STAGE AIR PUMP

专利摘要:
A step air pump includes a cylinder assembly (33), a second piston assembly (32) slidably mounted through the cylinder assembly (33), and a first piston assembly (31) protruding into the second piston assembly (32). Multiple chambers (301, 302, 303) are defined in the stage air pump and communicate with each other through multiple non-return mechanisms (3233, 3133). The air sucked into the multistage air pump is compressed in multiple stages with a single push. Therefore, a large amount of high pressure air is supplied.
公开号:FR3021370A1
申请号:FR1457842
申请日:2014-08-14
公开日:2015-11-27
发明作者:Chui-Ching Yang；Hsin-Yi Yang
申请人:Chui-Ching Yang；Hsin-Yi Yang；
IPC主号:

专利说明:

[0001] The present invention relates to a multi-stage air pump, in particular an air pump which can pressurize air inside the air pump in multiple stages in a single thrust. 'A piston. Air pumps are common tools used in everyday life. Air pumps are used to inflate items such as balloons or tires, particularly mountain bikes tires. Referring to Figure 15, it can be seen that a first conventional air pump comprises a cylinder 12, a piston assembly 11 and an exhaust seat 13. The cylinder 12 is tubular and has a front cap 121 and a rear cap 122 respectively mounted on two opposite ends of the cylinder 12. An inlet check valve is mounted in the front cap 121 of the cylinder 12 and allows only air to flow into the cylinder 12. The rear cap 122 has a through hole 123. The piston assembly 11 has a piston rod 111, a handle 112, a piston 113 and a sealing ring 114. The piston rod 111 is mounted through the cap rearward 122 and protrudes axially 25 in the cylinder 12. The handle 112 is mounted on an outer end of the piston rod 111. The piston 113 is mounted on an inner end of the piston rod 111. The sealing ring 114 is mounted around the piston 113. L The piston 113 and the sealing ring 114 are disposed within the cylinder 12 and are driven to move alternately and alternatively forwardly and rearwardly by the piston rod 111. A front chamber is defined in the cylinder 12 and between the piston 113 and the front cap 121. A rear chamber is defined in the cylinder 12 and between the piston 113 and the rear cap 122. The exhaust seat 13 is mounted in the front cap 121 of the cylinder 12.
[0002] During operation, the exhaust seat 13 is connected to an inflatable article. A user holds the handle and alternately pushes and pulls the piston assembly 11 to cause the piston 113 and the sealing ring 114 to move forward and backward alternately. When the piston assembly 11 is pulled backward, air outside the cylinder 12 is sucked into the front chamber of the cylinder 12 via the inlet check valve, and the air inside the rear chamber of the cylinder 12 is urged to flow out of the rear chamber through the through hole 123 of the rear cap 122. When the piston assembly 11 is pushed forward, the The air inside the front chamber of the cylinder 12 is pressurized and then flows out of the front chamber through the exhaust seat 13 to inflate the inflatable article. However, although the first conventional air pump has a simple structure and is easy to use, the first conventional air pump can provide only low pressure air. Thus, the first conventional air pump can only be used to inflate items that require low pressure air, such as balloons. The first conventional air pump can not be used to inflate articles that require high pressure air, such as bicycle tires. Referring also to Figure 16, it can be seen that there is shown a second conventional air pump developed to inflate the tires of the bicycles, particularly the tires of mountain bikes. The conventional air pump comprises a cylinder 22, a piston assembly 21 and an exhaust seat 23. The cylinder 22 has a front cap 221 and a rear cap 222 respectively mounted on two opposite ends of the cylinder 22. A non-return valve -Input return is mounted in the front cap 221 of the cylinder 22. The rear cap 222 has a through hole. The piston assembly 21 has a piston rod 211, a handle 212, a piston 213 and a sealing ring 214. The piston rod 211 is mounted through the rear cap 222. The handle 212 is mounted on an outer end 211. The piston 213 is mounted on an inner end of the piston rod 211. The sealing ring 214 is mounted around the piston 213. The piston 213 and the sealing ring 214 are driven to meet each other. move forwardly and rearward alternately by the piston rod 211. The exhaust seat 23 is mounted in the front cap 221 of the cylinder 22. Compared with the first conventional air pump, a volume cylinder 22 and a cross-sectional area of the piston 213 of the second air pump are reduced. As a result, an inside diameter of the cylinder 22 of the second conventional air pump is smaller than an inside diameter of the cylinder 12 of the first conventional air pump. The second conventional air pump has a higher compression ratio than the first conventional air pump and can provide high pressure air to inflate the tires of the bicycles. However, since the volume of the cylinder 22 of the second conventional air pump is reduced, each time the user pushes the piston rod 211, only a small amount of high pressure air is formed. Therefore, to inflate the same article, the number of times pushing and pulling the piston assembly 21 of the second conventional air pump is greater than the number of times that one pushes and the piston assembly 11 is pulled out of the first conventional air pump. Inflating the article with the second conventional air pump requires more work and increases the duration of the operation, which leads to low efficiency. The present invention aims to provide a multistage air pump. The stage air pump comprises a cylinder assembly, a second piston assembly slidably mounted through the cylinder assembly, and a first piston assembly mounted on the cylinder assembly and projecting into the second piston assembly. Multiple chambers are defined in the stage air pump communicating with the outside of the stage air pump via at least one inlet non-return mechanism and at least one non-return mechanism. output feedback, and communicate with each other through multiple non-return mechanisms. During operation, the air that is drawn into the stage air pump is compressed and pressurized in multiple stages by a single push of the piston assemblies. Thus, the stage air pump can supply a large amount of high pressure air, so that inflating the article with the stage air pump saves labor and is effective. The present invention therefore relates to a multistage air pump, characterized in that it comprises: a cylinder assembly having: a cylinder having a front end and a rear end; and a rear cap mounted on the rear end of the cylinder and having a through hole; A second piston assembly slidably mounted through the through hole of the rear cap and having: a second rod slidably mounted through the through hole of the rear cap and having an inner end projecting into the cylinder; an outer end protruding from the cylinder; and a slide channel formed axially between the inner end of the second rod and the outer end of the second rod; a second piston formed on the inner end of the second rod and having: a through hole formed axially through the second piston and communicating with the sliding channel of the second rod; and an inner side wall formed around the through hole of the second piston; a second end cap mounted on the outer end of the second rod; an inner seal ring mounted on and around the inner side wall of the second piston; and at least one non-return mechanism mounted in the second piston; a first piston assembly mounted on the cylinder and having: a first rod axially mounted in the cylinder, mounted through the through hole of the second piston and bearing against the inner sealing ring of the second piston assembly, and the first rod having a inner end protruding into the sliding channel of the second rod and an outer end; a first piston formed on the inner end of the first rod; a first end cap mounted on the front end of the cylinder and connected to the outer end of the first rod; and at least one non-return mechanism mounted in the first piston; a second chamber defined in the sliding channel of the second rod and between the second piston and the first piston; and a third chamber defined in the sliding channel of the second rod and between the second piston and the second end cap; a multistage air pump in which: the at least one non-return mechanism of the second piston assembly allows only air in an interior of the cylinder to flow into the second chamber; the at least one non-return mechanism of the first piston assembly only allows air inside the second chamber to flow into the third chamber; one of the piston assemblies further has at least one output non-return mechanism, the or one of the output non-return mechanisms being mounted in the end cap of said piston assembly, and the at least one an outlet non-return mechanism allowing only air within the third chamber to flow out of the stage air pump. According to particular optional features of the present invention: the second piston has an outer sidewall and a distal end; the second piston assembly further has an outer seal ring mounted on and around the outer side wall of the second piston; the at least one non-return mechanism of the second piston assembly is disposed between the distal end of the second piston and the outer sealing ring of the second piston assembly; the stage air pump has a first chamber defined in the cylinder and between the first end cap and the second piston; the first piston assembly has two output non-return mechanisms respectively mounted in the first end cap and the first piston; the first rod has an air channel axially formed in the first rod and between the outer end of the first rod and the inner end of the first rod, and the air channel of the first rod communicates with the third chamber through the output non-return mechanism which is mounted in the first piston, and communicates with the outside of the stage air pump via the output non-return mechanism which is mounted in the first end cap; the first piston assembly further has at least one input non-return mechanism mounted in the first end cap and disposed around the output non-return mechanism which is mounted in the first end cap; the at least one non-return mechanism of the second piston assembly only allows air inside the first chamber to flow into the second chamber; and the at least one inlet non-return mechanism allows only air outside the stage air pump to flow into the first chamber. According to particular optional features of the present invention: the second piston has an outer sidewall and a distal end; the second end cap has an air channel axially formed through the second end cap and communicating with the third chamber; the second piston assembly has: an outer sealing ring mounted on and around the outer lateral wall of the second piston and bearing against the cylinder; and - a first output non-return mechanism mounted in the air channel of the second end cap; the at least one non-return mechanism of the second piston assembly is disposed between the distal end of the second piston and the outer sealing ring of the second piston assembly; the multistage air pump has a first chamber defined in the cylinder and between the first end cap and the second piston; and - the first piston assembly has at least one input non-return mechanism mounted in the first end cap; the at least one non-return mechanism of the second piston assembly only allows air inside the first chamber to flow into the second chamber; and the at least one inlet non-return mechanism allows only air outside the stage air pump to flow into the first chamber. According to a particular embodiment of the present invention: - the rear cap has an inner side wall formed around the through hole of the rear cap; the cylinder assembly furthermore has: a sealing ring mounted on and around the inner side wall of the rear cap and bearing against the second rod; and - at least one input non-return mechanism mounted in the rear cap, disposed around the through hole of the rear cap and allowing only air outside the stage air pump to flow. inside the cylinder. In the particular embodiment mentioned above: the second piston may have an outer side wall and a proximal end attached to the second rod; - The second piston assembly may further have an outer seal ring mounted on and around the outer side wall of the second piston and bearing against the cylinder; the at least one non-return mechanism of the second piston assembly can be disposed between the proximal end of the second piston and the outer sealing ring of the second piston assembly; the stage air pump may have a first chamber defined in the cylinder and between the rear cap and the second piston; the first piston assembly may have two output non-return mechanisms mounted respectively in the first end cap and the first piston; and - the first rod may have an axially formed air channel in the first rod and between the outer end of the first rod and the inner end of the first rod, and the air channel of the first rod communicates with the third chamber through the outlet non-return mechanism which is mounted in the first piston, and communicates with the outside of the stage air pump via the output non-return mechanism which is mounted in the first end cap; the at least one non-return mechanism of the second piston assembly only allows air inside the first chamber to flow into the second chamber.
[0003] Alternatively, in the particular embodiment mentioned above: the second piston may have an outer sidewall and a proximal end attached to the second rod; the second end cap may have an air channel 5 formed axially through the second end cap and communicating with the third chamber; the second piston assembly may have: an outer sealing ring mounted on and around the outer side wall of the second piston and bearing against the cylinder; and an outlet non-return mechanism mounted in the air channel of the second end cap; the at least one non-return mechanism of the second piston assembly may be disposed between the proximal end of the second piston and the outer seal ring of the second piston assembly; and - the stage air pump may have a first chamber defined in the cylinder and between the rear cap and the second piston; The at least one non-return mechanism of the second piston assembly only allows air inside the first chamber to flow into the second chamber. Alternatively, in the particular embodiment mentioned above: the second piston may have an outer side wall, a distal end and a proximal end attached to the second stem; the second piston assembly may furthermore have an outer sealing ring mounted on and around the outer lateral wall of the second piston and bearing against the cylinder; the second piston assembly may have two non-return mechanisms disposed respectively between the proximal end of the second piston and the outer seal ring of the second piston assembly, and between the distal end of the second piston and the piston ring; external sealing of the second piston assembly; the stage air pump may have: a first chamber defined in the cylinder and between the rear cap and the second piston; and a fourth chamber defined in the cylinder and between the first end cap and the second piston; the first piston assembly may have two output non-return mechanisms mounted respectively in the first end cap and the first piston; the first rod may have an air channel formed axially in the first rod and between the outer end of the first rod and the inner end of the first rod, and the air channel of the first rod communicates with the first rod; third chamber through the outlet non-return mechanism which is mounted in the first piston, and communicates with the outside of the stage air pump via the output non-return mechanism which is mounted in the first end cap; and - the first piston assembly may further have at least one input non-return mechanism mounted in the first end cap and disposed around the output non-return mechanism which is mounted in the first end cap ; the non-return mechanisms of the second piston assembly only allow air inside the first chamber and the fourth chamber to flow into the second chamber; and the at least one inlet non-return mechanism of the first piston assembly only allows air outside the stage air pump to flow into the fourth chamber.
[0004] Alternatively, in the particular embodiment mentioned above: the second piston may have an outer sidewall, a distal end and a proximal end attached to the second rod; the second end cap may have an air channel 5 formed axially through the second end cap and communicating with the third chamber; the second piston assembly may furthermore have: an outer sealing ring mounted on and around the outer lateral wall of the second piston and bearing against the cylinder; and an outlet non-return mechanism mounted in the air channel of the second end cap; the second piston assembly may have two non-return mechanisms disposed respectively between the proximal end of the second piston and the outer sealing ring of the second piston assembly, and between the distal end of the second piston and the piston ring; external sealing of the second piston assembly; the stage air pump may have: a first chamber defined in the cylinder and between the rear cap and the second piston; and a fourth chamber defined in the cylinder and between the first end cap and the second piston; and the first piston assembly may further have at least one input non-return mechanism mounted in the first end cap; the non-return mechanisms of the second piston assembly only allow air inside the first chamber and the fourth chamber to flow into the second chamber; and the at least one inlet non-return mechanism of the first piston assembly only allows air outside the stage air pump to flow into the fourth chamber.
[0005] According to particular optional features of the present invention: - the or each of the non-return mechanisms comprises: a mounting hole having an exit end, of non-circular cross-section, and a tapered and cross-sectioned end of the invention circular; and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole; the tapered inlet end of the mounting hole of the or each of the non-return mechanisms of the second piston assembly extends towards and communicates with the first chamber; the tapered entrance end of the mounting hole of the or each of the non-return mechanisms of the first piston assembly extends towards and communicates with the second chamber; the tapered inlet end of the mounting hole of the or each inlet non-return mechanism extends away from the first chamber and communicates with the outside of the stage air pump; and - the tapered inlet end of the mounting hole of the or each of the output non-return mechanisms extends to and communicates with the third chamber. According to particular optional features of the present invention: - the or each input non-return mechanism of the cylinder assembly comprises: a mounting hole having an exit end, of non-circular cross-section, and an end tapered entrance and circular cross section; and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole; the tapered inlet end of the mounting hole of the or each inlet non-return mechanism of the cylinder assembly extends toward and communicates with the outside of the stage air pump. In accordance with particular facultative features of the present invention: the tapered entrance end of the mounting hole of the or each of the non-return mechanisms of the first piston assembly extends toward and communicates with the second chamber; the tapered entrance end of the mounting hole of the or each of the output non-return mechanisms extends to and communicates with the third chamber; and - the tapered inlet end of the mounting hole of the or each of the non-return mechanism of the second piston assembly extends towards and communicates with the cylinder. According to particular optional features of the present invention: the step air pump has a first chamber defined in the cylinder and between the first end cap and the second piston; The first piston assembly further has at least one input non-return mechanism mounted in the first end cap, and the or each input non-return mechanism has: an annular channel formed axially to through the first end cap; and a V-shaped seal ring mounted in the annular channel of the inlet non-return mechanism and having an annular groove, facing the first chamber, and two resilient tongues bearing against the first end cap; the or each of the non-return mechanisms of the first piston assembly has: an annular channel formed in and around an outer side wall of the first piston; and a V-shaped sealing ring mounted in the annular channel of the non-return mechanism of the first piston assembly, and having an annular groove, facing the third chamber, and two resilient tongues respectively bearing against the first piston and the second stem; the second piston has: an outer lateral wall; a distal end; and at least one ventilation hole formed radially through the second piston; and - the or each non-return mechanism of the second piston assembly is disposed between the distal end of the second piston and the ventilation hole, and has: - an annular channel formed in and around the outer side wall of the second piston ; and a V-shaped seal ring mounted in the annular channel of the non-return mechanism of the second piston assembly, and having an annular groove, facing the ventilation hole, and two resilient tongues bearing against the second piston and the cylinder . According to particular optional features of the present invention: - the cylinder assembly further has at least one input non-return mechanism mounted in the rear cap and disposed around the through hole of the rear cap, and the or each of input non-return mechanisms a: - an annular channel formed axially through the rear cap and around the through hole of the rear cap; and a V-shaped sealing ring mounted in the annular channel of the inlet non-return mechanism, and having an annular groove, facing the first chamber, and two resilient tongues bearing against the rear cap. According to particular facultative features of the present invention: - the or each of the non-return mechanisms of the first piston assembly has: - an annular channel formed in and around an outer side wall of the first piston; and a V-shaped sealing ring mounted in the annular channel of the non-return mechanism of the first piston assembly, and having an annular groove facing the third chamber, and two resilient tongues respectively bearing against the first piston. and the second stem. According to particular optional features of the present invention: - the second piston has: - an outer side wall; A proximal end attached to the second stem; and - a ventilation hole formed radially through the second piston; the at least one non-return mechanism of the second piston assembly is disposed between the proximal end of the second piston and the ventilation hole, and the or each of the non-return mechanisms of the second piston assembly has: annular channel formed in and around the outer side wall of the second piston; and a V-shaped sealing ring mounted in the annular channel of the non-return mechanism of the second piston assembly, and having an annular groove, turned towards the ventilation hole, and two resilient tongues bearing against the second piston and the cylinder.
[0006] In accordance with particular optional features of the present invention: the first piston assembly further has at least one input non-return mechanism mounted in the first end cap and disposed around the at least one non-return mechanism; an output return which is mounted in the first end cap, and the or each of the input non-return mechanisms has: an annular channel formed axially through the first end cap; and a V-shaped seal ring mounted in the annular channel of the inlet non-return mechanism, and having an annular groove, facing the first chamber, and two resilient tongues bearing against the first end cap; and - the second piston has: an outer side wall; a distal end; a proximal end attached to the second stem; and a ventilation hole formed radially through the second piston; the second piston assembly has two non-return mechanisms disposed respectively between the proximal end of the second piston and the ventilation hole, and between the distal end of the second piston and the ventilation hole, and each of the non-return mechanisms. returning the second piston assembly to: an annular channel formed in and around the outer side wall of the second piston; and a V-shaped seal ring mounted in the annular channel of the non-return mechanism of the second piston assembly, and having an annular groove, facing the ventilation hole, and two resilient tongues bearing against the second piston and the cylinder .
[0007] In accordance with particular optional features of the present invention: - the first piston assembly has two output non-return mechanisms respectively mounted in the first end cap and the first piston, each of the output non-return mechanisms comprises: a mounting hole having an exit end, of non-circular cross-section, and a tapered entrance end of circular cross section and extending towards and communicating with the third chamber; and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole; and the first rod has an air channel formed axially in the first rod and between the outlet end of the first rod and the inner end of the first rod, and the air channel of the first rod communicates with the third chamber through the outlet non-return mechanism which is mounted in the first piston, and communicates with the outside of the stage air pump via the output non-return mechanism which is mounted in the first end cap. According to particular optional features of the present invention: the second end cap has an air channel axially formed through the second end cap and communicating with the third chamber; the second piston assembly has an outlet non-return mechanism mounted in the air channel of the second end cap, and the output non-return mechanism has a mounting hole having an exit end, of non-circular cross section, and a tapered entrance end of circular cross-section, and extending towards and communicating with the third chamber; and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole. According to particular optional features of the present invention: the first piston assembly has two output non-return mechanisms respectively mounted in the first end cap and the first piston; the first rod has an air channel axially formed in the first rod and between the outer end of the first rod and the inner end of the first rod, and the air channel of the first rod communicates with the first rod; third chamber through the outlet non-return mechanism which is mounted in the first piston and communicates with the outside of the stage air pump via the output non-return mechanism which is mounted in the first end cap; each of the output non-return mechanisms comprises: a mounting hole having an exit end, of non-circular cross section, and a tapered entrance end of circular cross section and extending to and communicating with the third chamber ; and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole. According to particular optional features of the present invention: the second end cap has an air channel axially formed through the second end cap and communicating with the third chamber; the second piston assembly has an output non-return mechanism mounted in the air channel of the second end cap, and the output non-return mechanism has a mounting hole having a section exit end; non-circular cross-section, and a tapered entrance end of circular cross section and extending towards and communicating with the third chamber; and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole.
[0008] To better illustrate the object of the present invention, will be described hereinafter several particular embodiments with reference to the accompanying drawing. In this drawing: - Figure 1 is a side view in operation, in partial section, of a first embodiment of a stage air pump according to the present invention; - Figure 2 is another side view in operation, in partial section, of the stage air pump of Figure 1; - Figure 3 is a side view in operation, in partial section, of a second embodiment of a stage air pump according to the present invention; - Figure 4 is another side view in operation, in partial section, of the stage air pump of Figure 3; - Figure 5 is a side view in operation, in partial section, of a third embodiment of a stage air pump according to the present invention; - Figure 6 is another side view in operation, in partial section, of the stage air pump of Figure 5; - Figure 7 is a side view in operation, in partial section, of a fourth embodiment of a stage air pump according to the present invention; - Figure 8 is another side view in operation, in partial section, of the stage air pump of Figure 7; FIG. 9 is a side view in sectional view of a fifth embodiment of a stage air pump according to the present invention; - Figure 10 is another side view in operation, in partial section, of the stage air pump of Figure 9; - Figure 11 is a side view in operation, in partial section, of a sixth embodiment of a stage air pump according to the present invention; - Figure 12 is another side view in operation, in partial section, of the stage air pump of Figure 11; FIG. 13 is a side view in sectional view of a seventh embodiment of a stage air pump according to the present invention; - Figure 14 is another side view in operation, in partial section, of the stage air pump of Figure 13; - Figure 15 is a partial sectional side view of a conventional air pump according to the prior art; and - Figure 16 is a partial sectional side view of another conventional air pump according to the prior art.
[0009] Referring to Figures 1, 3, 5, 7, 9, 11 and 13, it can be seen that a stage air pump according to the present invention comprises a cylinder assembly 33, 43, 53, 63, 73 83, 93, a second piston assembly 32, 42, 52, 62, 72, 82, 92, a first piston assembly 31, 41, 51, 61, 71, 81, 91, a second chamber 302, 402, 502, 602, 702, 802, 902 and a third chamber 303, 403, 503, 603, 703, 803, 903. The cylinder assembly 33, 43, 53, 63, 73, 83, 93 comprises a cylinder 331, 431, 531, 631, 731, 831, 931 and a rear cap 332, 432, 532, 632, 732, 832, 932. The cylinder 331, 431, 531, 631, 731, 831, 931 is tubular and has a front end and an end. back. The rear cap 332, 432, 532, 632, 732, 832, 932 is mounted on the rear end of the cylinder 331, 431, 531, 631, 731, 831, 931 and has a through hole formed through 932. the cap 332, 432, 532, 632, 732, 832, the second piston assembly 32, 42, 52, 62, 72, 82, 92 is slidably mounted through the through hole of the rear cap 332, 432, 532, 632 , 732, 832, 932 and includes a second rod 321, 421, 521, 621, 721, 821, 921, a second piston 323, 423, 523, 623, 723, 823, 923, a second end cap 322, 422, 522, 622, 722, 822, 922, an inner sealing ring 3232, 6232 and at least one non-return mechanism 3233, 4233, 5233, 5234, 6233, 7233, 8233, 8234, 9233, 9234. The second rod 321, 421, 521, 621, 721, 821, 921 is slidably mounted through the through hole of the rear cap 332, 432, 532, 632, 732, 832, 932 and has an inner end, a outer end and a sliding channel t. The inner end of the second rod 321, 421, 521, 621, 721, 821, 921 projects into the barrel 331, 431, 531, 631, 731, 831, 931. The outer end of the second rod 321 , 421, 521, 621, 721, 821, 921 projects out of the cylinder 331, 431, 531, 631, 731, 831, 931. The sliding channel of the second rod 321, 421, 521, 621, 721, 821 921 is axially formed between the inner end 15 of the second rod 321, 421, 521, 621, 721, 821, 921 and the outer end of the second rod 321, 421, 521, 621, 721, 821, 921 The second piston 323, 423, 523, 623, 723, 823, 923 is formed on the inner end of the second rod 321, 421, 521, 621, 721, 821, 921, is mounted in the cylinder 331, 431, 531, 631, 731, 831, 931 and has a through hole and an inner side wall. The through hole of the second piston 323, 423, 523, 623, 723, 823, 923 is axially formed through the second piston 323, 423, 523, 623, 723, 823, 923 and communicates with the slide channel of the piston. second rod 321, 421, 521, 621, 721, 821, 921. The inner side wall of the second piston 323, 423, 523, 623, 723, 823, 923 is formed around the through hole of the second piston 323, 423, 523 , 623, 723, 823, 923. The second end cap 322, 422, 522, 622, 722, 822, 922 is mounted on the outer end of the second rod 321, 421, 521, 621, 721, 821, 921. The inner seal ring 3232, 6232 is mounted on and around the inner side wall of the second piston 323, 423, 523, 623, 723, 823, 923. The at least one return 3233, 4233, 5233, 5234, 6233, 7233, 8233, 8234 of the second piston assembly 32, 42, 52, 62, 72, 82, 92 is mounted in the second piston 323, 423, 523, 623, 723, 823 , 923.
[0010] The first piston assembly 31, 42, 51, 61, 71, 81, 91 is mounted on the cylinder 331, 431, 531, 631, 731, 831, 931 and has a first rod 311, 411, 511, 611, 711, 811, 911, a first piston 313, 413, 513, 613, 713, 813, 913, a first end cap 312, 412, 512, 612, 712, 812, 912 and at least one non-return mechanism 3133 , 4133, 5133, 6133, 7133, 8133, 9133. The first shaft 311, 411, 511, 611, 711, 811, 911 is mounted axially in the cylinder 331, 431, 531, 631, 731, 831, 931, is mounted through the through-hole of the second piston 323, 423, 523, 623, 723, 823, 923 bears against the inner sealing ring 3232, 6232 of the second piston assembly 32, 42, 52, 62, 72, 82, 92 and has an inner end and an outer end. The inner end of the first shaft 311, 411, 511, 611, 711, 811, 911 protrudes into the sliding channel of the second shaft 321, 421, 521, 621, 721, 821, 921. The outer end first shank 311, 411, 511, 611, 711, 811, 911 is opposed to the inner end of the first shank 311, 411, 511, 611, 711, 811, 911 and corresponds in position to the end. the first piston 313, 413, 513, 613, 713, 813, 913 is formed on the inner end of the first rod 311, 411, 511, 611, 711, 811, 911 and is mounted in the sliding channel of the second rod 321, 421, 521, 621, 721, 821, 921. The first end cap 312, 412, 512, 612, 712, 812, 912 is mounted on the front end of the cylinder 331, 431, 531, 631, 731, 831, 931 and is connected to the outer end of the first shaft 311, 411, 511, 611, 711, 811, 911. The at least one non-return mechanism 3133, 4133, 5133, 6133, 7133, 8133, 9133 of the first piston assembly 31, 41, 51, 61, 71, 81, 91 is mounted in the first piston 313, 413, 513, 613, 713, 813, 913. The second chamber 302, 402, 502, 602, 702, 802, 902 is defined in the slide channel of the second rod 321, 421, 521, 621, 721, 821, 921 and between the second piston 323, 423, 523, 623, 723, 823, 923 and the first piston 313, 413, 513, 613, 713, 813, 913. The at least one non-return mechanism 3233, 4233, 5233, 5234, 6233, 7233, 8233, 8234, 9233, 9234 of the second piston assembly 32, 42, 52, 62, 72, 82, 92 allows only air in an interior of the cylinder 331, 431, 531, 631, 731, 831, 931 of flow into the second chamber 302, 402, 502, 602, 702, 802, 902. The third chamber 303, 403, 503, 603, 703, 803, 903 is defined in the sliding channel of the second rod 321, 421 , 521, 621, 721, 821, 921 and between the second piston 323, 423, 523, 623, 723, 823, 923 and the second end cap 322, 422, 522, 622, 722, 822, 922, and selectively communicates with the second chamber 302, 402, 502, 602, 702, 802, 902 via the at least one non-contact mechanism. return 3133, 4133, 5133, 6133, 7133, 8133, 9133 of the first piston assembly 31, 41, 51, 61, 71, 81, 91. The at least one non-return mechanism 3133, 4133, 5133, 6133, 7133, 8133, 9133 of the first piston assembly 31, 41, 51, 61, 71, 81, 91 only allows air inside the second chamber 302, 402, 502, 602, 702, 802 , 903 to flow into the third chamber 303, 403, 503, 603, 703, 803, 903. One of the piston assemblies 31, 42, 51, 62, 72, 82, 92 further has at least one output nonreturn mechanism 3121, 3132, 4121, 4132, 5121, 5132, 6221, 7221, 8221, 9221. The one or one of the output nonreturn mechanisms 3121, 4121, 5121, 5221, 7221, 8221, 9221 is mounted in the end cap 312, 412, 512, 622, 722, 822 of the piston assembly 31, 42, 51, 62, 72, 82, 9 2. The third chamber 303, 403, 503, 603, 703, 803, 903 selectively communicates with an outside of the stage air pump via the at least one 5121 non-return mechanism, 5132, 6221, 7221, non-return mechanism of 5121, 5132, 6221, 7221, 8221, 9221 only allows air inside the third chamber 303, 403, 503, 603, 703, 803, 903 to flow out of the stage air pump. As shown in Figure 1, in a first preferred embodiment, the second piston 323 has an outer sidewall and a proximal end. The proximal end of the second piston 323 is attached to the second rod 321. The second piston assembly 32 further comprises an outer seal ring 3231. The outer seal ring 3231 of the second piston assembly 32 is mounted on and around of the outer side wall of the second piston 323 and bears against the cylinder 331. The at least one non-return mechanism 3233 of the second piston assembly 32 is disposed between the proximal end of the second piston 323 and the piston ring. outer seal 3231 of the second piston assembly 32. The multistage air pump comprises a first chamber 301 defined in the cylinder 331 and between the rear cap 332 and the second piston 323. The at least one non-return mechanism 3233 second piston assembly 32 allows only air within the first chamber 301 to flow into the second chamber 302. The first piston 313 has an outer sidewall. The first piston assembly 31 has two output non-return mechanisms 3121, 3132 and a sealing ring 3131. The output non-return mechanisms 3121, 3132 are respectively mounted in the first end cap 312 and the first piston 313. The output 3121, 3132, 4121, 4132, 8221, 9221. The at least one outlet 3121, 3132, 4121, 4132, sealing ring 3131 of the first piston assembly 31 is mounted on and around the wall outer side of the first piston 313 and bears against the second rod 321. The first rod 311 has an air channel. The air channel of the first shaft 311 is axially formed in the first shaft 311 and between the outer end of the first shaft 311 and the inner end of the first shaft 311. The air channel of the first shaft 311 communicates with the third chamber 303 via the outlet non-return mechanism 3132 which is mounted in the first piston 313, and communicates with the outside of the stage air pump via the non-return mechanism. output return 3121 which is mounted in the first end cap 312.
[0011] The rear cap 332 has an inner side wall formed around the through-hole of the rear cap 332. The cylinder assembly 33 further has a seal ring 3321 and at least one inlet non-return mechanism 3322. sealing 3321 of the cylinder assembly 33 is mounted on and around the inner side wall of the rear cap 332 and bears against the second rod 321. The at least one input non-return mechanism 3322 is mounted in the rear cap 332 is disposed around the through hole of the rear cap 332 and allows only air outside the stage air pump to flow into the first chamber 301. As shown in FIG. 1, during operation, the first end cap 312 is connected to an inflatable article. One user holds the cylinder assembly 33 and alternately pushes and pulls the second piston assembly 32 to cause the second rod 321 and the second piston 323 to move alternately forward and backward. As the second piston assembly 32 is pulled, the volumes of the first chamber 301 and the second chamber 302 decrease and the volume of the third chamber 303 increases. As a result, the air inside the first chamber 301 and the second chamber 302 is compressed and the air inside the third chamber 303 is decompressed. Thus, the air inside the second chamber 302 flows into the third chamber 303 through the at least one non-return mechanism 3133 of the first piston assembly 31. Even though the pressure of air inside the first chamber 301 is greater than the air pressure outside the stage air pump, the air inside the first chamber 301 can not flow out of the first chamber 301 through the at least one input non-return mechanism 3322. The air inside the first chamber 301 does not flow to the second chamber 302 via of the at least one non-return mechanism 3233 of the second piston assembly 32 until the air pressure inside the first chamber 301 becomes greater than the air pressure inside the second bedroom 302.
[0012] Referring also to Figure 2, it can be seen that as the second piston assembly 32 is pushed, the volumes of the first chamber 301 and the second chamber 302 increase and the volume of the third chamber 303 decreases. As a result, the air inside the third chamber 303 is compressed and the air inside the first chamber 301 and the second chamber 302 is decompressed. Thus, the air outside the stage air pump flows into the first chamber 301 through the at least one inlet non-return mechanism 3322 of the cylinder assembly 33. Since the air pressure inside the third chamber 303 is greater than the air pressure inside the second chamber 302, the air inside the second chamber 302 can not flow to the third chamber 303 through the at least one non-return mechanism 3133 of the first piston assembly 31. The compressed air inside the third chamber 303 flows into the article inflatable via the output non-return mechanism 3132 which is mounted in the first piston 313, the air channel of the first rod 311 and the output non-return mechanism 3121 which is mounted in the first cap 312. As shown in FIG. 3, in a second preferred embodiment the second piston 423 has an outer sidewall and a distal end. The second piston assembly 42 further comprises an outer seal ring 4231. The outer seal ring 4231 of the second piston assembly 42 is mounted on and around the outer side wall of the second piston 423 and bears against the cylinder. 431. The at least one non-return mechanism 4233 of the second piston assembly 42 is disposed between the distal end of the second piston 423 and the outer seal ring 4231 of the second piston assembly 42. The multi-stage air pump comprises a first chamber 401 defined in the cylinder 431 and between the first end cap 412 and the second piston 423. The at least one non-return mechanism 4233 of the second piston assembly 42 allows only air to flow. The first piston assembly 41 has two output non-return mechanisms 4121, 4132. The output non-return mechanisms mounted respectively in the first end cap 412 and the first piston 413. The first rod 411 has an air channel. The air channel of the first rod 411 is axially formed in the first rod 411 and between the outer end of the first rod 411 and the inner end of the first rod 411. The air channel of the first rod 411 35 communicates with the third chamber 403 via the outlet non-return mechanism 4132 which is mounted in the first piston 413, and communicates with the outside of the multistage air pump via the non-return mechanism. output-back 4121 which is mounted in the first end cap 412.
[0013] The first piston assembly 41 further has at least one input non-return mechanism 4122. The at least one input non-return mechanism 4122 is mounted in the first end cap 412 and is disposed around the output non-return mechanism 4121 which is mounted in the first end cap 412. The at least one input non-return mechanism 4122 only allows air outside the air pump In the first chamber 401, as shown in FIG. 3, during operation, the first end cap 412 is connected to the inflatable article. The user holds the cylinder assembly 43 and alternately pushes and pulls the second piston assembly 42 to cause the second rod 421 and the second piston 423 to move forwardly and rearwardly alternately. As the second piston assembly 42 is pulled, the volume of the second chamber 402 decreases and the volumes of the first chamber 401 and the third chamber 403 increase. As a result, the air inside the second chamber 402 is compressed and the air inside the first chamber 401 and the third chamber 403 is decompressed. Thus, air outside the stage air pump flows into the first chamber 401 via the at least one inlet non-return mechanism 4122 of the first piston assembly 41 Even if the air pressure inside the second chamber 402 is greater than the air pressure inside the first chamber 401, the compressed air inside the second chamber 402 can not not flow to the first chamber 401 through the at least one non-return mechanism 4233 of the second piston assembly 42. The compressed air within the second chamber 402 flows into the third chamber 403 through the at least one non-return mechanism 4133 of the first piston assembly 41. Referring further to FIG. 4, it can be seen that when the second piston assembly 42 is pushed, the volume of the second chamber 402 increases and the volumes of the first chamber 401 and the third my room 403 decreases. As a result, the air inside the first chamber 401 and the third chamber 403 is compressed and the air inside the second chamber 402 is decompressed. Thus, since the compressed air within the first chamber 301 can not flow out of the first chamber 301 through the at least one input non-return mechanism 4122, the compressed air inside the first chamber 401 flows into the second chamber 402 through the at least one non-return mechanism 4233 of the second piston assembly 42. In addition, even if the pressure of air inside the third chamber 403 is greater than the air pressure inside the second chamber 402, the air inside the third chamber 403 can not flow to the second chamber 402 through the at least one non-return mechanism 4133 of the first piston assembly 41. The compressed air within the third chamber 403 flows into the inflatable article via of the output non-return mechanism 4132 which is mounted in the first piston 413, of the r of the first rod 411 and the output non-return mechanism 4121 which is mounted in the first end cap 412. As shown in FIG. 5, in a third preferred embodiment, the second piston 523 has a wall outer side, a distal end and a proximal end. The proximal end of the second piston 523 is attached to the second shaft 521. The second piston assembly 52 further has an outer seal ring 5231. The outer seal ring 5231 of the second piston assembly 52 is mounted on and around the the outer side wall of the second piston 523 and bears against the cylinder 531. The second piston assembly 52 has two non-return mechanisms 5233, 5234. The non-return mechanisms 5233, 5234 of the second piston assembly 52 are arranged respectively between the proximal end of the second piston 523 and the outer seal ring 5231 of the second piston assembly 52, and between the distal end 10 of the second piston 523 and the outer seal ring 5231 of the second piston assembly 52. The stage air pump 501 comprises a first chamber 501 and a fourth chamber 504. The first chamber 501 is defined in the cylinder 531 and between the rear cap 532 and the second piston 523. The fourth chamber 504 is defined in the cylinder 531 and between the first end cap 512 and the second piston 523. The non-return mechanisms 5233, 5234 of the second piston assembly 52 only allow air to flow. the first chamber 501 and the fourth chamber 504 to flow into the second chamber 502. The first piston assembly 51 has two output non-return mechanisms 5121, 5132. The output non-return mechanisms 5121 5132 are respectively mounted in the first end cap 512 and the first piston 513. The first rod 511 has an air channel. The air channel of the first rod 511 is axially formed in the first rod 511 and between the outer end of the first rod 511 and the inner end of the first rod 511. The air channel of the first rod 511 communicates with the third chamber 503 via the outlet non-return mechanism 5132 which is mounted in the first piston 513, and communicates with the outside of the stage air pump through the mechanism of non-return output 5121 which is mounted in the first end cap 512.
[0014] The cylinder assembly 53 further has at least one input non-return mechanism 5322. The at least one input non-return mechanism 5322 of the cylinder assembly 53 is mounted in the rear cap 532, is arranged around the through hole of the rear cap 532 and allows only air outside the stage air pump to flow into the first chamber 501. The first piston assembly 51 further has at least one mechanism 5122. The at least one inlet non-return mechanism 5122 of the first piston assembly 51 is mounted in the first end cap 512 and is disposed around the exit non-return mechanism. 5121 which is mounted in the first end cap 512. The at least one inlet non-return mechanism 5122 of the first piston assembly 51 allows only the air outside of the air stage pump. to flow into the fourth chamber 504. As shown in FIG. operation, the first end cap 512 is connected to the inflatable article. The user holds the cylinder assembly 53 and alternately pushes and pulls the second piston assembly 52 to cause the second rod 521 and the second piston 523 to move alternately forward and backward. As the second piston assembly 52 is pulled, the volumes of the first chamber 501 and the second chamber 502 decrease and the volumes of the third chamber 503 and the fourth chamber 504 increase. As a result, the air inside the first chamber 501 and the second chamber 502 is compressed and the air inside the third chamber 503 and the fourth chamber 504 is decompressed. Thus, the compressed air inside the second chamber 502 flows into the third chamber 503 via the at least one non-return mechanism 5133 of the first piston assembly 51. the interior of the second chamber 502 can not flow to the first chamber 501 through the non-return mechanism 5233 which is disposed between the proximal end of the second piston 523 and the outer seal ring 5231 of the second piston assembly 52.
[0015] The air inside the first chamber 501 can not flow out of the stage air pump through the at least one inlet cylinder return mechanism 5322 of the cylinder assembly 53. Since the air pressure inside the first chamber 501 is greater than an air pressure inside the second chamber 502, the compressed air inside the first chamber 501 flows into the second chamber 502 through the non-return mechanism 5233 which is disposed between the proximal end of the second piston 523 and the outer seal ring 5231 of the second piston assembly 52. In addition, the The air outside the stage air pump flows into the fourth chamber 504 through the at least one inlet non-return mechanism 5122 of the first piston assembly 51. air inside the second chamber 502 is greater than the air pressure at the int In the fourth chamber 504, the air inside the second chamber 502 can not flow to the fourth chamber 504 through the non-return mechanism 5234 which is disposed between the distal end of the second chamber 502. second piston 523 and the outer sealing ring 5231 of the second piston assembly 52. Referring further to FIG. 6, it can be seen that when the second piston assembly 52 is pushed, the volumes of the first chamber 501 and the second chamber 502 increase and the volumes of the third chamber 503 and the fourth chamber 504 decrease. As a result, the air inside the third chamber 503 and the fourth chamber 504 is compressed and the air inside the first chamber 501 and the second chamber 502 is decompressed. Thus, the air outside the stage air pump flows into the first chamber 501 through the at least one inlet non-return mechanism 5322 of the cylinder assembly 53. The compressed air within the fourth chamber 504 flows into the second chamber 502 via the non-return mechanism 5234 which is disposed between the distal end of the second piston 523 and the ring of the second chamber 502. outer seal 5231 of the second piston assembly 52. The compressed air within the fourth chamber 504 can not flow out of the stage air pump through the at least one non-pneumatic mechanism. 5122 of the first piston assembly 51. In addition, the compressed air inside the third chamber 503 flows into the inflatable article via the outlet non-return mechanism 5132. which is mounted in the first piston 513, the air channel of the first rod 511 and the mecha 5121, which is mounted in the first end cap 512. As shown in FIG. 7, in a fourth preferred embodiment, the second piston 623 has an outer side wall and a distal end. The second end cap 622 has an air channel. The air channel of the second end cap 622 is axially formed through the second end cap 622 and communicates with the third chamber 603. The second piston assembly 62 has an outer seal ring 6231 and a seal mechanism. 6221. The outer seal ring 6231 of the second piston assembly 62 is mounted on and around the outer side wall of the second piston 623 and bears against the cylinder 631. The exit non-return mechanism 6221 is mounted in the air channel of the second end cap 622 and allows only air within the third chamber 603 to flow out of the 35-stage air pump. The at least one non-return mechanism 6233 of the second piston assembly 62 is disposed between the distal end of the second piston 623 and the outer seal ring 6231 of the second piston assembly 62. The multi-stage air pump comprises a first chamber 601 defined in the cylinder 631 and between the first end cap 612 and the second piston 623. The at least one non-return mechanism 6233 of the second piston assembly 62 allows only air within the the first chamber 601 to flow into the second chamber 602.
[0016] The first piston 613 has an outer sidewall. The first piston assembly 61 has at least one inlet non-return mechanism 6122 and a sealing ring 6131. The at least one inlet non-return mechanism 6122 is mounted in the first end cap 6122. and allows only air outside the stage air pump to flow into the first chamber 601. The seal ring 6131 of the first piston assembly 613 is mounted on and around the outer side wall. of the first piston 613 and bears against the second rod 621. As shown in Figure 7, during operation, the second end cap 622 is connected to the inflatable article. The user holds the cylinder assembly 63 and alternately pushes and pulls the cylinder assembly 63 and the first piston assembly 61 to move the first shaft 611 and the first piston 613 to move forwards and backwards. alternately. When the first piston assembly 61 is pulled, the volume of the second chamber 602 decreases and the volumes of the first chamber 601 and the third chamber 603 increase. As a result, the air inside the second chamber 602 is compressed and the air inside the first chamber 601 and the third chamber 603 is decompressed. Thus, the compressed air within the second chamber 602 can not flow to the first chamber 601 through the at least one non-return mechanism 6233 of the second piston assembly 62. Compressed air within the second chamber 602 flows into the third chamber 603 through the at least one non-return mechanism 6133 of the first piston assembly 61. Air to the outside the stage air pump 601 flows into the first chamber 601 through the inlet non-return mechanism 6122 of the first piston assembly 61. Referring further to FIG. can see that when the first piston assembly 61 is pushed, the volume of the second chamber 602 increases and the volumes of the first chamber 601 and the third chamber 603 decrease. As a result, the air inside the first chamber 601 and the third chamber 603 is compressed and the air inside the second chamber 602 is decompressed. Thus, compressed air within the first chamber 601 flows into the second chamber 602 through the at least one non-return mechanism 6233 of the second piston assembly 62. Compressed air within the third chamber 603 flows into the inflatable article via the air channel of the second end cap 622 and the outlet non-return mechanism 6221. As shown in FIG. 9, in a fifth preferred embodiment, the second piston 723 has an outer sidewall and a proximal end. The proximal end of the second piston 723 is attached to the second rod 721. The second end cap 722 has an air channel. The air channel of the second end cap 722 is axially formed through the second end cap 722 and communicates with the third chamber 703. The second piston assembly 72 has an outer seal ring 7231 and a non-return mechanism. The outer seal ring 7231 of the second piston assembly 72 is mounted on and around the outer side wall of the second piston 723 and bears against the cylinder 731. The exit non-return mechanism 7221 is mounted in the air channel of the second end cap 722. The at least one non-return mechanism 7233 of the second piston assembly 72 is disposed between the proximal end of the second piston 723 and the piston ring. outer seal 7231 of the second piston assembly 72. The multistage air pump has a first chamber 701 defined in the cylinder 731 and between the rear cap 732 and the second piston 723. The at least one non-return mechanism 7233 the second piston assembly 72 allows only air within the first chamber 701 to flow into the second chamber 702. The rear cap 732 has an inner side wall formed around the through hole of the rear cap 732 The cylinder assembly 73 further has a sealing ring 7321 and at least one inlet non-return mechanism 7322. The sealing ring 7321 of the cylinder assembly 73 is mounted on and around the side wall The at least one input non-return mechanism 7322 is mounted in the rear cap 732, is disposed around the through hole of the rear cap 732 and allows the inner end of the rear cap 732 to bear against the second rod 721. only to air outside the stage air pump to flow into the first chamber 701. As shown in FIG. 9, during operation, the second end cap 722 is connected to the inflatable article . The user holds the cylinder assembly 73 and alternately pushes and pulls the cylinder assembly 73 and the first piston assembly 71 to cause the first rod 711 and the first piston 713 to move forwards and toward the cylinder. back alternately. As the first piston assembly 71 is pulled, the volumes of the first chamber 701 and the second chamber 702 decrease and the volume of the third chamber 703 increases. As a result, the air inside the first chamber 701 and the second chamber 702 is compressed and the air inside the third chamber 703 is decompressed. Thus, the compressed air inside the second chamber 702 flows into the third chamber 703 through the at least one non-return mechanism 7133 of the first piston assembly 71. air inside the first chamber 701 is greater than the air pressure outside the stage air pump, the air inside the first chamber 701 does not flow out of the first chamber 701 through the at least one input non-return mechanism 7322. The air inside the first chamber 701 does not flow to the second chamber 702 via of the at least one non-return mechanism 7233 of the second piston assembly 72 until the air pressure inside the first chamber 701 becomes greater than the air pressure inside the second chamber 702. Referring also to Figure 10, it can be seen that when the first piston assembly 71 is pushed, the volume of the third chamber 703 decreases and the volumes of the first chamber 701 and the second chamber 702 increase. Therefore, the air inside the third chamber 703 is compressed and the air inside the first chamber 701 and the second chamber 702 is decompressed. Thus, the air outside the stage air pump flows into the first chamber 701 through the at least one input non-return mechanism 7322. The compressed air at the interior of the third chamber 703 can not flow to the second chamber 702 through the at least one non-return mechanism 7133 of the first piston assembly 71. The compressed air within the third chamber chamber 703 flows into the inflatable article through the air channel of the second end cap 722 and the outlet non-return mechanism 7221. As shown in FIG. 11, in a sixth embodiment of FIG. In a preferred embodiment, the second piston 823 has an outer side wall, a distal end and a proximal end. The proximal end of the second piston 823 is attached to the second rod 821. The second end cap 822 has an air channel. The air channel of the second end cap 822 is axially formed through the second end cap 822 and communicates with the third chamber 803. The second piston assembly 82 further has an outer seal 8231 and a first outer non-return mechanism 8221. The outer sealing ring 8231 of the second piston assembly 82 is mounted on and around the outer side wall of the second piston 823 and bears against the cylinder 831. The non-return mechanism 8221 Outlet 8221 is mounted in the air channel of the second end cap 822. The second piston assembly 82 has two non-return mechanisms 8233, 8234. The non-return mechanisms 8233, 8234 of the second set piston 82 are respectively disposed between the proximal end of the second piston 823 and the outer seal ring 8231 of the second piston assembly 82, and between the distal end of the second piston 823 and the seal ring. 8231 of the second piston assembly 82. The multistage air pump has a first chamber 801 and a fourth chamber 804. The first chamber 801 is defined in the cylinder 831 and between the rear cap 832 and the second piston 823. The fourth chamber 804 is defined in the cylinder 831 and between the first end cap 812 and the second piston 823. The non-return mechanisms 8233, 8234 of the second piston assembly 82 only allow air inside the cylinder. the first chamber 801 and the fourth chamber 804 to flow into the second chamber 802.
[0017] The cylinder assembly 83 further comprises at least one input non-return mechanism 8322. The at least one input non-return mechanism 8322 of the cylinder assembly 83 is mounted in the rear cap 832, is arranged around the through hole of the rear cap 832 and allows only air outside the stage air pump to flow into the first chamber 801. The first piston assembly 81 further has at least one mechanism 8122. The at least one inlet non-return mechanism 8122 of the first piston assembly 81 is mounted in the first end cap 812, and allows only air outside. The stage air pump 804 flows into the fourth chamber 804. As shown in FIG. 11, during operation, the second end cap 822 is connected to the inflatable article. The user holds the cylinder assembly 83 and alternately pushes and pulls the cylinder assembly 83 and the first piston assembly 81 to cause the first rod 811 and the first piston 813 to move forward and back alternately. When the first piston assembly 81 is pulled, the volumes of the first chamber 801 and the second chamber 802 decrease and the volumes of the third chamber 803 and the fourth chamber 804 increase. As a result, the air inside the first chamber 801 and the second chamber 802 is compressed and the air inside the third chamber 803 and the fourth chamber 804 is decompressed. Thus, the compressed air within the second chamber 802 flows into the third chamber 803 through the at least one non-return mechanism 8133 of the first piston assembly 81. Compressed air within the second chamber 802 can not flow to the first chamber 801 through the non-return mechanism 8233 which is disposed between the proximal end of the second piston 823 and the sealing ring. 8231 of the second piston assembly 82. The air inside the first chamber 801 can not flow out of the stage air pump through the at least one non-return mechanism. 8322 of the cylinder assembly 83. Since the air pressure inside the first chamber 801 is greater than the air pressure inside the second chamber 802, the compressed air the interior of the first chamber 801 flows into the second chamber 802 through through the non-return mechanism 8233 which is disposed between the proximal end of the second piston 823 and the outer seal ring 8231 of the second piston assembly 82. In addition, the air outside the step air flows into the fourth chamber 804 through the at least one inlet non-return mechanism 8122 of the first piston assembly 81. Even if the air pressure inside the second the chamber 802 is greater than the air pressure inside the fourth chamber 804, the air inside the second chamber 802 can not flow to the fourth chamber 804 through the 8234 which is disposed between the distal end of the second piston 823 and the outer seal ring 8231 of the second piston assembly 82. Referring further to FIG. 12, it can be seen that when the first set piston is pushed, the volumes of the first ch amber 801 and second chamber 802 increase and the volumes of the third chamber 803 and the fourth chamber 804 decrease. As a result, the air inside the third chamber 803 and the fourth chamber 804 is compressed and the air inside the first chamber 801 and the second chamber 802 is decompressed. Thus, the air outside the stage air pump flows into the first chamber 801 through the at least one inlet non-return mechanism 8322 of the cylinder assembly 83. The compressed air within the fourth chamber 804 flows into the second chamber 802 through the non-return mechanism 8234 which is disposed between the distal end of the second piston 823 and the sealing ring. 8231 of the second piston assembly 82. The compressed air within the fourth chamber 804 can not flow out of the stage air pump through the at least one non-return mechanism. 8122 of the first piston assembly 81. In addition, the compressed air within the third chamber 803 flows into the inflatable article via the air channel of the second end cap 822. and the output non-return mechanism 8221. In particular, in the first to sixth mo preferred embodiments described above, the or each of the non-return mechanisms 4132, 4133, 4233, 4121, 4122, 6133, 6233, 6221, 6122, 3322, 5322, 7322, 8322 comprises a mounting hole and a ball. The mounting hole has an output end and an input end. The exit end has a non-circular cross section. The inlet end is opposite the exit end, is tapered and has a circular cross section. The ball is mounted in the mounting hole and between the output end and the input end of the mounting hole. In the second to fourth preferred embodiments, the outlet end of the mounting hole of the or each of the non-return mechanisms 4233, 6233 of the second piston assembly 42, 62 communicates with the second chamber 402, 602, and the tapered inlet end 30 of the mounting hole of the or each of the non-return mechanisms 4233, 6233 of the second piston assembly 42, 62 extends towards and communicates with the first chamber 401, 601. The end of the exit of the mounting hole of the or each of the non-return mechanisms 4133, 6133 of the first piston assembly 41, 61 communicates with the third chamber 403, 603, and the tapered inlet end of the mounting hole of the each of the non-return mechanisms 4133, 6133 of the first piston assembly 41, 61 extends towards and communicates with the second chamber 402, 602. The exit end of the mounting hole of the or each of the non-return mechanisms input 4122, 6122 communicates with the first ch amber 401, 601 and the tapered inlet end of the mounting hole of the or each of the inlet non-return mechanisms 4122, 6122 extends away from the first chamber 401, 601 and communicates with the outside of the multi-stage air pump. The tapered inlet end of the mounting hole of the or each of the output non-return mechanisms 4132, 4121, 6221 extends toward and communicates with the third chamber 403, 603. In particular, in the second mode of preferred embodiment, the output end of the output non-return mechanism mounting hole 4132 which is mounted in the second piston 413 communicates with the air channel of the first rod 411, and the tapered inlet end of the output non-return mechanism mounting hole 4132 which is mounted in the second piston 413 extends towards and communicates with the third chamber 403. The output end of the mounting hole of the output non-return mechanism 4121 which is mounted in the first cap 412 communicates with the outside of the stage air pump and the tapered inlet end of the mounting hole of the output non-return mechanism 4121 which is mounted in the first cap 412 extends towards and communicates with With the air channel of the first rod 411. Thus, the tapered inlet end of the mounting hole of the output non-return mechanism 4121 which is mounted in the first cap 412 communicates with the third chamber 403 by the In the fourth preferred embodiment, the outlet end of the mounting hole of the outlet non-return mechanism 6221 of the second piston assembly 62 communicates with the outside of the air channel of the first rod 411. In the fourth preferred embodiment of the stage air pump and the tapered inlet end of the outlet non-return mechanism mounting hole 6221 of the second piston assembly 62 extends toward and communicates with the air channel of the second cap 622. Thus, the tapered inlet end of the outlet non-return mechanism mounting hole 6221 of the second piston assembly 62 communicates with the third chamber 603 via the air channel of the second cap 622.
[0018] In the first, third, fifth and sixth preferred embodiments, the exit end of the mounting hole of the or each of the input non-return mechanisms 3322, 5322, 7322, 8322 of the cylinder assembly 33, 53, 73, 83 communicates with the first chamber 301, 501, 701, 801 and the tapered inlet end of the mounting hole of the or each of the input non-return mechanisms 3322, 5322, 7322, 8322 of the cylinder assembly 33, 53, 73, 83 extends towards and communicates with the outside of the multistage air pump. The outlet end of the mounting hole of the or each of the non-return mechanisms 3133, 5133, 7133, 8133 of the first piston assembly 31, 51, 71, 81 communicates with the third chamber 303, 503, 703, 803 and the tapered inlet end of the mounting hole of the or each of the one-way mechanisms 3133, 5133, 7133, 8133 of the first piston assembly 31, 51, 71, 81 extends towards and communicates with the second chamber 302 , 502, 702, 802. The tapered inlet end of the mounting hole of the or each of the output non-return mechanisms 3121, 3132, 5121, 5132, 7221, 8221 extends to and communicates with the third chamber 303, 503, 703, 803. The outlet end of the mounting hole of the or each of the non-return mechanisms 3233, 5233, 5234, 7233, 8233, 8234 of the second piston assembly 32, 52, 72, 82 communicates with the second chamber 302, 502, 702, 802 and the tapered inlet end of the mounting hole of the or each one of the non-return mechanisms 3233, 523 3, 5234, 7233, 8233, 8234 of the second piston assembly 32, 52, 72, 82 extends towards and communicates with the cylinder 331, 531, 731, 831. In particular, the outlet end and the end of tapered inlet of the mounting hole of or each of the non-return mechanisms 3233, 5233, 7233, 8233 which are disposed between the proximal end of the second piston 323, 523, 723, 823 and the outer seal ring 3231, 5231, 7231, 8231 of the second piston assembly 32, 52, 72, 82 communicate respectively with the second chamber 302, 502, 702, 802 and the first chamber 303, 503, 703, 803. In addition, in the third and sixth preferred embodiments, the exit end and the tapered inlet end of the mounting hole of the or each one of the non-return mechanisms 5234, 8234 which are disposed between the distal end of the second piston 523 823 and outer sealing ring 5231, 8231 of the second piston assembly 52, 82 communicate with respect with the second chamber 502, 802 and the first chamber 503, 803. The outlet end of the mounting hole of the or each of the inlet non-return mechanisms 5122, 8122 of the first piston assembly 51, 81 communicates. with the fourth chamber 504, 804 and the tapered inlet end of the mounting hole of the or each inlet non-return mechanism 5122, 8122 of the first piston assembly 51, 81 extends towards and communicates with the outside of the multi-stage air pump. In particular, in the first and third preferred embodiments, the output end of the mounting hole of the output non-return mechanism 3132, which is mounted in the second piston 313, 513 communicates with the the first shank 311, 511 and the tapered inlet end of the exit non-return mechanism mounting hole 3132, 5132 which is mounted in the second piston 313, 513 extends toward and communicates with the third chamber 303, 503. The output end of the output nonreturn mechanism mounting hole 3121, 5121 which is mounted in the first cap 312, 512 communicates with the outside of the stage air pump and the the tapered entry end of the output nonreturn mechanism mounting hole 3121, 5121 which is mounted in the first cap 312, 512 extends toward and communicates with the air channel of the first shaft 311, 511 So, the tapered entrance end of the mounting hole of the mec Exit non-return anism 3121, 5121 which is mounted in the first cap 312, 512 communicates with the third chamber 303, 503 via the air channel of the first shaft 311, 511. In particular, in the fifth and sixth preferred embodiments, the outlet end of the output non-return mechanism mounting hole 7221, 8221 of the second piston assembly 72, 82 communicates with the outside of the stage air pump and the tapered inlet end of the outlet non-return mechanism mounting hole 7221, 8221 of the second piston assembly 72, 82 extends to and communicates with the air channel of the second cap 722, 822. Thus, the tapered inlet end of the output non-return mechanism mounting hole 7221, 8221 of the second piston assembly 72, 82 communicates with the third chamber 703, 803 via the air channel of the second cap 722, 822 .
[0019] As shown in FIG. 13, in a seventh preferred embodiment, the second piston 923 has an outer side wall, a distal end, a proximal end and at least one ventilation hole 9232. The proximal end of the second piston 923 is fixed at the second rod 921. The at least one ventilation hole 9232 is radially formed through the second piston 923. The second end cap 922 has an air channel. The air channel of the second end cap 922 is axially formed through the second end cap 922 and communicates with the third chamber 903. The second piston assembly 92 further includes a 9221 exit nonreturn mechanism. The outlet non-return mechanism 9221 is mounted in the air channel of the second end cap 922. The second piston assembly 92 has two non-return mechanisms 9233, 9234. The non-return mechanisms 9233 9234 of the second piston assembly 92 are respectively disposed between the proximal end of the second piston 923 and the at least one ventilation hole 9232, and between the distal end of the second piston 923 and the at least one ventilation hole 9232. The multistage air pump has a first chamber 901 and a fourth chamber 904. The first chamber 901 is defined in the cylinder 931 and between the rear cap 932 and the second piston 923. The fourth chamber 904 is defined in FIG. cyli 931 and between the first end cap 912 and the second piston 923. The non-return mechanisms 9233, 9234 of the second piston assembly 92 only allow air inside the first chamber 901 and the fourth chamber 904 to flow into the second chamber 902. The cylinder assembly 93 further has at least one input non-return mechanism 9322. The at least one input non-return mechanism 9322 of the cylinder assembly 93 is mounted in the rear cap 932, is disposed around the through hole of the rear cap 932 and allows only air outside the stage air pump to flow into the first The first piston assembly 91 further has at least one input non-return mechanism 9122. The at least one input non-return mechanism 9122 of the first piston assembly 91 is mounted in the first cap. 912 end, and only allows air outside the pom In particular, the outlet non-return mechanism 9221 of the second piston assembly 92 includes a mounting hole and a ball. The mounting hole has an output end and an input end. The exit end has a non-circular cross section. The inlet end is opposite the exit end, is tapered and has a circular cross section.
[0020] The outlet end of the outlet non-return mechanism mounting hole 9221 of the second piston assembly 92 communicates with the outside of the stage air pump and the tapered inlet end of the mounting mechanism mounting hole. output no-return 9221 of the second piston assembly 92 extends toward and communicates with the air channel of the second cap 922. The ball is mounted in the mounting hole and between the exit end and the end of the entrance to the mounting hole. Each of the remaining non-return mechanisms 9133, 9233, 9234, 9322, 9122 of the first piston assembly 91, the second piston assembly 92 and the cylinder assembly 93 comprise an annular channel and a V-shaped seal ring. V-shaped sealing ring is mounted in the annular channel and has a functional end surface, an annular groove and two resilient tongues. The annular groove is formed in and around the operative end surface of the V-shaped seal ring. The resilient tabs are oppositely formed adjacent to the annular groove.
[0021] The annular channel of the at least one non-return mechanism 9133 of the first piston assembly 91 is formed in and around an outer side wall of the first piston 913. The annular groove of the V-shaped seal ring of the at least one non-return mechanism 9133 of the first piston assembly 91 is facing the third chamber 903. The resilient tongues of the V-sealing ring of the at least one non-return mechanism 9133 of the first piston assembly 91 are respectively bearing against the first piston 913 and the second rod 921.
[0022] The annular channels of the non-return mechanisms 9233, 9234 of the second piston assembly 92 are formed separately in and around the outer side wall of the second piston 923. The annular grooves of the V-rings of the non-return mechanisms 9233 , 9234 of the second piston assembly 92 are turned towards the at least one ventilation hole 9232 of the second piston 923. The resilient tongues of each of the V-rings of the non-return mechanisms 9233, 9234 of the second piston assembly 92 are respectively bearing against the second piston 923 and the cylinder 931. The annular channel of the inlet non-return mechanism 9322 of the cylinder assembly 93 is formed in and around an inner side wall of the rear cap 932. The annular groove of the V-ring seal of the inlet non-return mechanism 9322 of the cylinder assembly 93 is turned towards the first chamber 901. The elastic tongues of the brass ring V-shape of the input non-return mechanism 9322 of the cylinder assembly 93 bears respectively against the rear cap 932 and the second rod 921. The annular channel of the input non-return mechanism 9122 of the first set Piston 91 is axially formed through the first end cap 912.
[0023] The annular groove of the V-ring seal of the inlet non-return mechanism 9122 of the first piston assembly 91 faces the fourth chamber 901. The resilient tongues of the V-ring seal of the non-return mechanism input return 9122 of the first piston assembly 91 abuts against the first end cap 912. As shown in FIG. 13, during operation, changes in the air pressure in the first chamber 901, 801, the Second chamber 902, 802, the third chamber 903, 803 and the fourth chamber 904, 804 of the seventh and sixth preferred embodiments of the multistage air pump are substantially identical. When the air pressure of the first chamber 901 is greater than the air pressure of the third chamber 903 and the air pressure of the fourth chamber 904, the air inside the first chamber 901 passes between the second piston 923 and the cylinder 931 and pushes the resilient tongue of the V-ring seal of the non-return mechanism 9233 which is disposed between the proximal end of the second piston 923 and the at least one ventilation hole 9232, to flow into the second chamber 902 through the at least one ventilation hole 9232. In addition, the air from the first chamber 901 fills the annular groove of the V-shaped seal ring. of the non-return mechanism 9233 which is disposed between the distal end of the second piston 923 and the at least one ventilation hole 9232, to prevent the V-ring from shrinking. Thus, the resilient tongue of the V-ring seal of the non-return mechanism 9233 which is disposed between the distal end of the second piston 923 and the at least one ventilation hole 9232 bears securely against the cylinder 931 and the air from the first chamber 901 does not flow to the fourth chamber 904.
[0024] Likewise, when the air pressure inside the first chamber 901 is lower than the air pressure outside the stage air pump, the air outside the air pump The multi-stage pushes the tongue of the V-ring seal of the inlet non-return mechanism 9322 of the cylinder assembly 93 to flow into the first chamber 901. When the air pressure therein of the first chamber 901 is greater than the air pressure outside the stage air pump, the air inside the first chamber 901 does not flow out of the stage air pump via the V-ring seal of the inlet check mechanism 9322 of the cylinder assembly 93. Descriptions of the air flows between the fourth chamber 904 and the outside of the pump multistage air, between the fourth chamber 904 and the second chamber 902, and between the third chamber 903 and an ar inflatable article are omitted. The stage air pump as described has the following advantages. The air sucked into the stage air pump is compressed and pressurized in multiple stages by a single push by the piston assemblies 31, 41, 51, 61, 71, 81, 91, 32, 42. , 52, 62, 72, 82, 92. Thus, the stage air pump can supply a large amount of high pressure air. As a result, inflating the article with the stepped air pump 15 saves labor and is effective.

权利要求:
Claims (14)
[0001]
CLAIMS1 - Staged air pump, characterized in that it comprises: a cylinder assembly (33, 43, 53, 63, 73, 83, 93) having: a cylinder (331, 431, 531, 631, 731, 831, 931) having a front end and a rear end; and a rear cap (332, 432, 532, 632, 732, 832, 932) mounted on the rear end of the cylinder (331, 431, 531, 631, 731, 831, 931) and having a through hole; a second piston assembly (32, 42, 52, 62, 72, 82, 92) slidably mounted through the through hole of the rear cap (332, 432, 532, 632, 732, 832, 932) and having: a second rod (321, 421, 521, 621, 721, 821, 921) slidably mounted through the through hole of the rear cap (332, 432, 532, 632, 732, 832, 932) and having: an inner end protruding into the cylinder (331, 431, 531, 631, 731, 831, 931); an outer end projecting from the cylinder (331, 431, 531, 631, 731, 831, 931); and a sliding channel formed axially between the inner end of the second rod (321, 421, 521, 621, 721, 821, 921) and the outer end of the second rod (321, 421, 521, 621, 721 821, 921); a second piston (323, 423, 523, 623, 723, 823, 923) formed on the inner end of the second rod (321, 421, 521, 621, 721, 821, 921) and having: a through hole formed axially through the second piston (323, 423, 523, 623, 723, 823, 923) and communicating with the sliding channel of the second rod (321, 421, 521, 621, 721, 821, 921); and an inner side wall formed around the through hole of the second piston (323, 423, 523, 623, 723, 823, 923); a second end cap (322, 422, 522, 622, 722, 822, 922) mounted on the outer end of the second rod (321, 421, 521, 621, 721, 821, 921); an inner seal ring (3232, 6232) mounted on and around the inner side wall of the second piston (323, 423, 523, 623, 723, 823, 923); and at least one non-return mechanism (3233, 4233, 5233, 5234, 6233, 7233, 8233, 8234, 9233, 9234) mounted in the second piston (323, 423, 523, 623, 723, 823, 923) ; a first piston assembly (31, 42, 51, 61, 71, 81, 91) mounted on the cylinder (331, 431, 531, 631, 731, 831, 931) and having: - a first rod (311, 411, 511, 611, 711, 811, 911) mounted axially in the cylinder (331, 431, 531, 631, 731, 831, 931), mounted through the through hole of the second piston (323, 423, 523, 623, 723 823, 923) and bearing against the inner seal ring (3232, 6232) of the second piston assembly (32, 42, 52, 62, 72, 82, 92), and the first piston rod (311, 411, 511 , 611, 711, 811, 911) having an inner end projecting into the slide channel of the second rod (321, 421, 521, 621, 721, 821, 921) and an outer end; a first piston (313, 413, 513, 613, 713, 813, 913) formed on the inner end of the first rod (311, 411, 511, 611, 711, 811, 911); a first end cap (312, 412, 512, 612, 712, 812, 912) mounted on the front end of the cylinder (331, 431, 531, 631, 731, 831, 931) and connected to the end outer of the first rod (311, 411, 511, 611, 711, 811, 911); and at least one non-return mechanism (3133, 4133, 5133, 6133, 7133, 8133, 9133) mounted in the first piston (313, 413, 513, 613, 713, 813, 913); a second chamber (302, 402, 502, 602, 702, 802, 902) defined in the sliding channel of the second rod (321, 421, 521, 621, 721, 821, 921) and between the second piston (323 , 423, 523, 623, 723, 823, 923) and the first piston (313, 413, 513, 613, 713, 813, 913); and a third chamber (303, 403, 503, 603, 703, 803, 903) defined in the sliding channel of the second rod (321, 421, 521, 621, 721, 821, 921) and between the second piston (323, 423, 523, 623, 723, 823, 923) and the second end cap (322, 422, 522, 622, 722, 822, 922); stage air pump in which: - the at least one non-return mechanism (3233, 4233, 5233, 5234, 6233, 7233, 8233, 8234, 9233, 9234) of the second piston assembly (32, 42, 52 , 62, 72, 82, 92) allows only air in an interior of the cylinder (331, 431, 531, 631, 731, 831, 931) to flow into the second chamber (302, 402, 502 , 602, 702, 802, 902); the at least one non-return mechanism (3133, 4133, 5133, 6133, 7133, 8133, 9133) of the first piston assembly (31, 42, 51, 61, 71, 81, 91) allows only air within the second chamber (302, 402, 502, 602, 702, 802, 902) flowing into the third chamber (303, 403, 503, 603, 703, 803, 903); one of the piston assemblies (31, 42, 51, 62, 72, 82, 92) further has at least one output non-return mechanism (3121, 3132, 4121, 4132, 5121, 5132, 6221, 7221, 8221, 9221), the one or one of the output non-return mechanisms (3121, 4121, 5121, 5221, 7221, 8221, 9221) being mounted in the end cap (312, 412, 512, 622, 722, 822, 922) of said piston assembly (31, 42, 51, 62, 72, 82, 92), and the at least one output non-return mechanism (3121, 3132, 4121, 4132, 5121 , 5132, 6221, 7221, 8221, 9221) allowing only air inside the third chamber (303, 403, 503, 603, 703, 803, 903) to flow out of the multi-stage air pump.
[0002]
2 - multistage air pump according to claim 1, characterized in that: - the second piston (423) has an outer side wall and a distal end; the second piston assembly (42) further has an outer seal ring (4231) mounted on and around the outer sidewall of the second piston (423); the at least one non-return mechanism (4233) of the second piston assembly (42) is disposed between the distal end of the second piston (423) and the outer seal ring (4231) of the second piston assembly (42); ); the stage air pump has a first chamber (401) defined in the cylinder (431) and between the first end cap (412) and the second piston (423); the first piston assembly (41) has two output non-return mechanisms (4121, 4132) respectively mounted in the first end cap (412) and the first piston (413); the first rod (411) has an air channel formed axially in the first rod (411) and between the outer end of the first rod (411) and the inner end of the first rod (411), and the air channel of the first rod (411) communicates with the third chamber (403) via the output non-return mechanism (4132) which is mounted in the first piston (413), and communicates with the outside of the stage air pump via the outlet non-return mechanism (4121) which is mounted in the first end cap (412), the first piston assembly (41) further has at least one an inlet non-return mechanism (4122) mounted in the first end cap (412) and disposed around the output non-return mechanism (4121) which is mounted in the first end cap (412); the at least one non-return mechanism (4233) of the second piston assembly (42) allows only air within the first chamber (401) to flow into the second chamber (402); and the at least one inlet non-return mechanism (4122) allows only air outside the stage air pump to flow into the first chamber (401).
[0003]
3 - stage air pump according to claim 1, characterized in that: the second piston (623) has an outer side wall and a distal end; the second end cap (622) has an air channel formed axially through the second end cap (622) and communicating with the third chamber (603); the second piston assembly (62) has: an outer seal ring (6231) mounted on and around the outer sidewall of the second piston (623) and bearing against the cylinder (631); and a first output non-return mechanism (6221) mounted in the air channel of the second end cap (622) the at least one non-return mechanism (6233) of the second piston assembly (62) is disposed between the distal end of the second piston (623) and the outer seal ring (6231) of the second piston assembly (62); - the multi-stage air pump has a first chamber (601) defined in the cylinder ( 631) and between the first end cap (612) and the second piston (623); and - the first piston assembly (61) has at least one input non-return mechanism (6122) mounted in the first end cap (612); the at least one non-return mechanism (6233) of the second piston assembly (62) allows only air within the first chamber (601) to flow into the second chamber (602) ; and the at least one inlet non-return mechanism (6122) allows only air outside the stage air pump to flow into the first chamber (601).
[0004]
4 - multistage air pump according to claim 1, characterized in that: - the rear cap (332, 532, 732, 832) has an inner side wall formed around the through hole of the rear cap (332, 532, 732 , 832); the cylinder assembly (33, 53, 73, 83) further has: a sealing ring (3321, 7321, 8321) mounted on and around the inner side wall of the rear cap (332, 532, 732, 832 ) and bearing against the second rod (321, 521, 721, 821); and at least one input non-return mechanism (3322, 5322, 7322, 8322) mounted in the rear cap (332, 532, 732, 832) disposed around the through hole of the rear cap (332, 532, 732) , 832) and allowing only air outside the stage air pump to flow into the cylinder (331, 531, 731, 831).
[0005]
5 - stage air pump according to claim 4, characterized in that: - the second piston (323) has an outer side wall and a proximal end attached to the second rod (321); the second piston assembly (32) further has an outer seal ring (3231) mounted on and around the outer sidewall of the second piston (323) and bearing against the cylinder (331); the at least one non-return mechanism (3233) of the second piston assembly (32) is disposed between the proximal end of the second piston (323) and the outer seal ring (3231) of the second piston assembly (32) ; the stage air pump has a first chamber (301) defined in the cylinder (331) and between the rear cap (332) and the second piston (323); the first piston assembly (31) has two output non-return mechanisms (3121, 3132) respectively mounted in the first end cap (312) and the first piston (313); and - the first rod (311) has an air channel formed axially in the first rod (311) and between the outer end of the first rod (311) and the inner end of the first rod (311), and the air channel of the first rod (311) communicates with the third chamber (303) via the output non-return mechanism (3132) which is mounted in the first piston (313), and communicates with the outside the stage air pump via the outlet non-return mechanism (3121) which is mounted in the first end cap (312); the at least one non-return mechanism (3233) of the second piston assembly (32) allows only air within the first chamber (301) to flow into the second chamber (302). 35
[0006]
6 - multistage air pump according to claim 4, characterized in that: - the second piston (723) has an outer side wall and a proximal end attached to the second rod (721); the second end cap (722) has an air channel axially formed through the second end cap (722) and communicating with the third chamber (703); the second piston assembly (72) has: an outer sealing ring (7231) mounted on and around the outer side wall of the second piston (723) and bearing against the cylinder (731); and an outlet non-return mechanism (7221) mounted in the air channel of the second end cap (722); the at least one non-return mechanism (7233) of the second piston assembly (72) is disposed between the proximal end of the second piston (723) and the outer seal ring (7231) of the second piston assembly ( 72); and - the stage air pump has a first chamber (701) defined in the cylinder (731) and between the rear cap (732) and the second piston (723); the at least one non-return mechanism (7233) of the second piston assembly (72) allows only air within the first chamber (701) to flow into the second chamber (702) . 30
[0007]
7 - multistage air pump according to claim 4, characterized in that: - the second piston (523) has an outer side wall, a distal end and a proximal end attached to the second rod (521); second piston assembly (52) further has an outer seal ring (5231) mounted on and around the outer side wall of the second piston (523) and bearing against the cylinder (531); the second piston assembly (52) has two non-return mechanisms (5233, 5234) respectively disposed between the proximal end of the second piston (523) and the outer seal ring (5231) of the second piston assembly (52). and between the distal end of the second piston (523) and the outer seal ring (5231) of the second piston assembly (52); the step air pump has: a first chamber (501) defined in the cylinder (531) and between the rear cap (532) and the second piston (523); and - a fourth chamber (504) defined in the cylinder (531) and between the first end cap (512) and the second piston (523); the first piston assembly (51) has two output non-return mechanisms (5121, 5132) respectively mounted in the first end cap (512) and the first piston (513); the first rod (511) has an air channel formed axially in the first rod (511) and between the outer end of the first rod (511) and the inner end of the first rod (511), and the channel of the first rod (511) communicates with the third chamber (503) via the exit non-return mechanism (5132) which is mounted in the first piston (513), and communicates with the outside the stage air pump via the outlet non-return mechanism (5121) which is mounted in the first end cap (512); and - the first piston assembly (51) further has at least one input non-return mechanism (5122) mounted in the first end cap (512) and disposed around the output non-return mechanism (5121) which is mounted in the first end cap (512); the non-return mechanisms (5233, 5234) of the second piston assembly (52) only allow air inside the first chamber (501) and the fourth chamber (504) to flow into the second bedroom (502); and - the at least one inlet non-return mechanism (5122) of the first piston assembly (51) allows only air outside the stage air pump to flow into the fourth bedroom (504).
[0008]
8 - multistage air pump according to claim 4, characterized in that: - the second piston (823) has an outer side wall, a distal end and a proximal end attached to the second rod (821); the second end cap (822) has an air channel axially formed through the second end cap (822) and communicating with the third chamber (803); - The second piston assembly (82) further has: - an outer seal ring (8231) mounted on and around the outer side wall of the second piston (823) and bearing against the cylinder (831); and an outlet non-return mechanism (8221) mounted in the air channel of the second end cap (822); the second piston assembly (82) has two non-return mechanisms (8233, 8234) respectively disposed between the proximal end of the second piston (823) and the outer seal (8231) of the second piston assembly (82). and between the distal end of the second piston (823) and the outer seal ring (8231) of the second piston assembly (82); - the multistage air pump has: - a first chamber (801) defined in the cylinder (831) and between the rear cap (832) and the second piston (823); and - a fourth chamber (804) defined in the cylinder (831) and between the first end cap (812) and the second piston (823); and - the first piston assembly (81) further has at least one input non-return mechanism (8122) mounted in the first end cap (812); the non-return mechanisms (8233, 8234) of the second piston assembly (82) allow only air inside the first chamber (801) and the fourth chamber (804) to flow into the second bedroom (802); and - the at least one inlet non-return mechanism (8122) of the first piston assembly (81) allows only air outside the stage air pump to flow into the fourth room (804).
[0009]
9 - stage air pump according to one of claims 2 or 3, characterized in that: - the or each of the non-return mechanisms (4132, 4133, 4233, 4121, 4122, 6133, 6233, 6221, 6122) comprises: a mounting hole having an exit end, of non-circular cross-section, and a tapered and circular cross-section; and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole; the tapered inlet end of the mounting hole of the or each of the non-return mechanisms (4233, 6233) of the second piston assembly (42, 62) extends towards and communicates with the first chamber (401, 601 the tapered inlet end of the mounting hole of the or each of the non-return mechanisms (4133, 6133) of the first piston assembly (41, 61) extends towards and communicates with the second chamber (402); , 602); the tapered inlet end of the mounting hole of the or each of the inlet non-return mechanisms (4122, 6122) extends opposite the first chamber (401, 601) and communicates with the outside of the multistage air pump; and - the tapered inlet end of the mounting hole of the or each of the output non-return mechanisms (4132, 4121, 6221) extends toward and communicates with the third chamber (403, 603).
[0010]
10 - multistage air pump according to one of claims 4, 5, 6, 7 or 8, characterized in that: - the or each of the input non-return mechanisms (3322, 5322, 7322, 8322 ) of the cylinder assembly (33, 53, 73, 83) comprises: a mounting hole having an exit end, of non-circular cross-section, and a tapered entrance end of circular cross-section; and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole; the tapered inlet end of the mounting hole of the or each of the input non-return mechanisms (3322, 5122, 5322, 7322, 8122, 8322) of the cylinder assembly (33, 53, 73, 83) extends to and communicates with the outside of the stage air pump.
[0011]
11 - multistage air pump according to claim 35, characterized in that: - the tapered inlet end of the mounting hole of the or each of the non-return mechanisms (3133, 5133, 7133, 8133) the first piston assembly (31, 51, 71, 81) extends towards and communicates with the second chamber (302, 502, 702, 802); the tapered entrance end of the mounting hole of the or each of the output non-return mechanisms (3121, 3132, 5121, 5132, 7221, 8221) extends towards and communicates with the third chamber (303 503, 703, 803); and - the tapered entrance end of the mounting hole of the or each of the non-return mechanism (3233, 5233, 5234, 7233, 8233, 8234) of the second piston assembly (32, 52, 72, 82) extends towards and communicates with the cylinder (331, 531, 731, 831).
[0012]
12 - multistage air pump according to claim 1, characterized in that: - the stage air pump has a first chamber defined in the cylinder and between the first end cap and the second piston; the first piston assembly (41, 61) further has at least one input non-return mechanism (4122, 6122) mounted in the first end cap (412, 612), and the or each non-return input (4122, 6122) has: - an annular channel formed axially through the first end cap (412, 612); and a V-shaped seal ring mounted in the annular channel of the inlet non-return mechanism (4122, 6122) and having an annular groove, facing the first chamber (401, 601), and two resilient support tongues against the first end cap (412, 612); the or each of the non-return mechanisms (4133, 6133) of the first piston assembly (41, 61) has: an annular channel formed in and around an outer sidewall of the first piston (413, 613); and a V-shaped seal ring mounted in the annular channel of the non-return mechanism (4133, 6133) of the first piston assembly (41, 61), and having an annular groove, facing the third chamber (403, 603) and two resilient tongues respectively bearing against the first piston (413, 613) and the second rod (421, 621); the second piston (423, 623) has: an outer lateral wall; a distal end; and at least one ventilation hole formed radially through the second piston (423, 623); and the or each of the non-return mechanisms (4233, 6233) of the second piston assembly (42, 62) is disposed between the distal end of the second piston (423, 623) and the vent hole, and has a annular channel formed in and around the outer side wall of the second piston (423, 623); and a V-shaped seal ring mounted in the annular channel of the non-return mechanism (4233, 6233) of the second piston assembly (42, 62), and having an annular groove, facing the vent hole, and two tabs resilient bearing against the second piston (423, 623) and the cylinder (431, 631).
[0013]
13 - multistage air pump according to claim 1, characterized in that: - the cylinder assembly (33, 53, 73, 93) further has at least one inlet non-return mechanism (3322, 5322 , 7322, 9322) mounted in the rear cap (332, 532, 732, 932) and disposed around the through hole of the rear cap (332, 532, 732, 932), and the or each input non-return mechanism (3322, 5322, 7322, 9322) a: - an annular channel formed axially through the rear cap (332, 532, 732, 932) and around the through hole of the rear cap (332, 532, 732, 932); and a V-shaped seal ring mounted in the annular channel of the inlet non-return mechanism (3322, 5322, 7322, 9322), and having an annular groove, facing the first chamber (301, 501, 701, 801), and two resilient tongues resting against the rear cap (332, 532, 732, 932).
[0014]
14 - multistage air pump according to claim 13, characterized in that: - the or each of the non-return mechanisms (3133, 5133, 7133, 9133) of the first piston assembly (31, 51, 71, 91 a) an annular channel formed in and around an outer side wall of the first piston (313, 513, 713, 913); and a V-shaped seal ring mounted in the annular channel of the non-return mechanism (3133, 5133, 7133, 9133) of the first piston assembly (31, 51, 71, 91), and having an annular groove, rotated to the third chamber (303, 503, 703, 903), and two resilient tongues respectively bearing against the first piston (313, 513, 713, 913) and the second rod (321, 521, 721, 921). 30 - stage air pump according to claim 14, characterized in that: - the second piston (323, 723) has: an outer side wall; A proximal end attached to the second shank (321, 721); anda vent hole formed radially through the second piston (323, 723); the at least one non-return mechanism (3233, 7233) of the second piston assembly (32, 72) is disposed between the proximal end of the second piston (323, 723) and the vent hole, and the or each of non-return mechanisms (3233, 7233) of the second piston assembly (32, 72) a: - an annular channel formed in and around the outer sidewall of the second piston (323, 723); and a V-shaped seal ring mounted in the annular channel of the non-return mechanism (3233, 7233) of the second piston assembly (32, 72), and having an annular groove, facing the vent hole, and two tabs resilient bearing against the second piston (323, 723) and the cylinder (331, 731). 16 - multistage air pump according to claim 14, characterized in that: - the first piston assembly (51, 91) further has at least one input non-return mechanism (5122, 9122) mounted in the first end cap (512, 912) and disposed around the at least one output non-return mechanism (5121, 9121) which is mounted in the first end cap (512, 912), and the each of the input non-return mechanisms (5122, 9122) has: an annular channel formed axially through the first end cap (512, 912); and a V-shaped seal ring mounted in the annular channel of the inlet non-return mechanism (5122, 9122), and having an annular groove, facing the first chamber (501, 901), and two resilient tongues in bearing against the first end cap (512, 912); and the second piston (523, 923) has: an outer side wall; a distal end; a proximal end attached to the second shank (521, 921); and - a ventilation hole formed radially through the second piston (523, 923); the second piston assembly (52, 92) has two non-return mechanisms (5233, 5234, 9233, 9234) disposed respectively between the proximal end of the second piston (523, 923) and the ventilation hole, and between the distal end of the second piston (523, 923) and the vent hole, and each of the non-return mechanisms (5233, 5234, 9233, 9234) of the second piston assembly (52, 92) has: an annular channel formed in and around the outer side wall of the second piston (523, 923); and a V-shaped seal ring mounted in the annular channel of the non-return mechanism (5233, 5234, 9233, 9234) of the second piston assembly (52, 92), and having an annular groove, facing the vent hole and two resilient tongues bearing against the second piston (523, 923) and the cylinder (531, 931). 17 - multistage air pump according to claim 12, characterized in that: - the first piston assembly (41) has two output non-return mechanisms (4121, 4132) respectively mounted in the first end cap ( 412) and the first piston (413), each of the output non-return mechanisms (4121, 4132) comprises: a mounting hole having an exit end, of non-circular cross-section, and a tapered entrance end of circular cross section and extending to and communicating with the third chamber (403); and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole; and the first rod (411) has an air channel axially formed in the first rod (411) and between the exit end of the first rod (411) and the inner end of the first rod (411), and the air channel of the first rod (411) communicates with the third chamber (403) via the output non-return mechanism (4132) which is mounted in the first piston (413), and communicates with the outside the stage air pump via the outlet non-return mechanism (4121) which is mounted in the first end cap (412). 18 - multistage air pump according to claim 12, characterized in that: - the second end cap (622) has an air channel formed axially through the second end cap (622) and communicating with the third bedroom (603); the second piston assembly (62) has an outlet non-return mechanism (6221) mounted in the air channel of the second end cap (622), and the output non-return mechanism (6221) has a mounting hole having an exit end, of non-circular cross section, and a tapered entrance end of circular cross-section, and extending towards and communicating with the third chamber (603); and a ball mounted in the mounting hole and between the outlet end and the inlet end of the mounting hole.19 - Staged air pump according to one of claims 15 or 16, characterized in that the first piston assembly (31, 51) has two output non-return mechanisms (3121, 3132, 5121, 5132) respectively mounted in the first end cap (312, 512) and the first piston (313, 513); the first rod (311, 511) has an air channel formed axially in the first rod (311, 511) and between the outer end of the first rod (311, 511) and the inner end of the first rod; (311, 511), and the air channel of the first rod (311, 511) communicates with the third chamber (303, 303) via the output non-return mechanism (3132, 5132) which is mounted in the first piston (313, 513) and communicates with the outside of the stage air pump through the outlet non-return mechanism (3121, 5121) which is mounted in the first end cap (312, 512); each of the output non-return mechanisms (3121, 3132, 5121, 5132) comprises: a mounting hole having an exit end, of non-circular cross-section, and a tapered entrance end of circular cross-section and extending to and communicating with the third chamber (303, 503); and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole. 20 - multistage air pump according to one of claims 15 or 16, characterized in that: - the second end cap (722, 922) has an air channel formed axially through the second cap of end (722, 922) and communicating with the third chamber (703, 903); - the second piston assembly (72, 92) has an output non-return mechanism (7221, 9221) mounted in the air channel of the second end cap (722, 922), and the output non-return mechanism (7221, 9221) has: a mounting hole having an exit end of non-circular cross-section, and a tapered entrance end of circular cross section and extending to and communicating with the third chamber (703, 903); and a ball mounted in the mounting hole and between the output end and the input end of the mounting hole.

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同族专利:

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公开号 | 公开日

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US20150337821A1|2015-11-26|

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JP5886385B2|2016-03-16|

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TWI513896B|2015-12-21|

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JP2015218724A|2015-12-07|

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US9869306B2|2018-01-16|

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DE102014110639A1|2015-11-26|

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DE102014110639B4|2016-08-18|

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DE202014103484U1|2015-01-13|

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TW201500643A|2015-01-01|

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CN110017712B|2018-01-09|2021-03-26|讯凯国际股份有限公司|Double-sided blowing-up plate, embedding and riveting structure of double-sided blowing-up plate and embedding and riveting method of embedding and riveting structure|

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US10844849B2|2018-03-09|2020-11-24|Dongguan Tiger Point, Metal & Plastic Products Co., Ltd.|Manual dual-directional inflating device|

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EP3540219B1|2018-03-15|2020-02-26|Dongguan Tiger Point, Metal & Plastic Products Co., Ltd.|Manual dual-directional inflating device|

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CN110701019B|2018-07-09|2021-02-26|侨雄实业股份有限公司|Tenon type inflator|

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TWI662189B|2018-07-09|2019-06-11|僑雄實業股份有限公司|Mortise pump|

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CN111043044B|2019-12-27|2020-08-14|江苏盐邦泵业制造有限公司|Anti-leakage water pump|

法律状态:
2015-07-21| PLFP| Fee payment|Year of fee payment: 2 |

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2016-07-13| PLFP| Fee payment|Year of fee payment: 3 |

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2017-05-30| PLFP| Fee payment|Year of fee payment: 4 |

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2018-06-27| PLFP| Fee payment|Year of fee payment: 5 |

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2018-08-10| PLSC| Search report ready|Effective date: 20180810 |

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2020-04-10| RX| Complete rejection|Effective date: 20200305 |

优先权:

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申请号 | 申请日 | 专利标题

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TW103117784A|TWI513896B|2014-05-21|2014-05-21|Multi-stage pressurized pump|

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