• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A pressure shift valve assembly for a submersible hammer (10) having a valve (38, 138, 238) having a first valve pressure surface (40), a second valve pressure surface (42) and a third valve pressure surface (44). The first pressure surface (40) engages an inner surface of the casing hammer housing. The second valve pressure surface (42) is connected to a high-pressure opening by the submersible hammer (10). The third valve pressure surface (44) communicates with a passage which extends through a manifold (22) inside the submersible hammer (10). The valve (38, 138, 238) also includes a valve channel (46, 146, 246) which extends through the valve and which communicates with a first volume (52) of the submersible hammer (10). The first volume (52) is formed by surfaces of the manifold (22) and the third valve pressure surface (44).
    公开号:SE537461C2
    申请号:SE1150504
    申请日:2011-05-31
    公开日:2015-05-05
    发明作者:Leland H Lyon；Warren Thomas Lay
    申请人:Ct Rock Inc；
    IPC主号:
    专利说明:

    TITLE Pressure shift valve device for a submersible hammer.
    BACKGROUND This invention relates to a sledgehammer. The invention relates in particular to a percussion hammer which has a pressure-sensitive valve for controlling the drive chamber of the percussion hammer.
    Conventional pressure sensing valves are designed to provide efficient use of machining fluids to drive the hammer. However, such conventional pressure valves are often complicated by the need for a complex connection system in the hammer distributor. Therefore, there is a need for a pressure-sensitive valve that uses the processing liquids in an efficient manner without the need for any suitable complex distributor. The present invention corrects the shortcomings of conventional pressure sensing valves.
    SUMMARY OF THE INVENTION In accordance with a first preferred embodiment, the proposed invention discloses a pressure shift valve for a sledgehammer device. The device comprises a first, a second and a third pressure surface. The first valve pressure surface abuts an inner surface of a housing in the submersible drilling device and communicates with a drive chamber in the submersible drilling device. The second valve pressure surface is connected to a high-pressure opening in the submersible drilling device. The third valve pressure surface communicates with a passage that extends through a manifold within the housing. The device also comprises a valve channel which projects through the pressure changeover valve which is in connection with a first volume of the submersible drilling device. The first volume is formed by surfaces of the manifold and the third valve pressure surface. In accordance with a second preferred embodiment, the proposed invention shows an assembly of a pressure shift valve for a submersible drilling device comprising a housing, a manifold and a valve. The manifold is housed in the housing and includes an outlet shaft, a central cavity projecting axially through the manifold, and a number of openings projecting radially through the outlet shaft. The valve rests against the outlet shaft and is movable between an open and a 1 closed position. In the open position, a high-pressure opening is connected to a drive chamber. In the closed position, the high-pressure opening is closed against the drive housing. The valve comprises a first pressure surface, a second pressure surface, a third pressure surface and a valve channel which projects through the valve and is connected to a first volume of the submersible drilling device. The first volume is formed by surfaces of the manifold and at least one of the first, second or third valve pressure surface.
    According to a third preferred embodiment, the proposed invention discloses an assembly for a pressure shift valve for a submersible drilling device comprising a manifold and a valve. The manifold includes an upper body portion, a lower body portion having a side wall, and an outlet shaft extending distally from the lower body portion. The valve comprises a base part, a side cradle and a valve channel. The base part has a proximal surface, a distal surface and a hall that occupies the outlet shaft. The side cradle protrudes from the base part and has an inner side surface and an outer side surface. The valve channel extends through the valve and communicates with an area formed by the manifold and the proximal surface of the base member.
    Brief description of the figures' different views.
    The above-mentioned summary saval as the following detailed description will be understood if they are read in conjunction with the accompanying figures. To illustrate the invention, the figures show the most preferred embodiments. It is to be understood, however, that the invention is not limited to the exact devices and means shown.
    In the figures: Fig. 1 shows a perspective view of a submersible hammer in accordance with a first preferred embodiment of the proposed invention; Fig. 2 shows an enlarged view of a top closure of the submersible hammer in Fig. 1; Fig. 3 shows a cross section of the top closure in Fig. 2 in an upright view; Fig. 4 shows a perspective view of a non-return valve of the submersible hammer in Fig. 1; Fig. 5 shows a cross section of the non-return valve in Fig. 4 in an upright view; Fig. 6 shows a perspective view of a distributor of the submersible hammer in Fig. 1; Fig. 7 shows a cross section of the distributor in Fig. 4 in an upright view; Fig. 8 shows a cross-section of the distributor of Fig. 6 in an upright view with the cross-section taken through the through-holes in the distributor; Fig. 9 shows an enlarged view of a valve of the submersible hammer of Fig. 1; Fig. 10 shows a cross section of the valve of Fig. 9 in an upright view; Fig. 11 shows a partial cross-section of the submersible hammer in Fig. 1 with the non-return valve in a closed position and a valve in an open position.
    Fig. 12 shows an enlarged partial cross-section of the submersible hammer of Fig. 11 in an upright view with the valve in an open position and the cross-section taken through the distributor hl through.
    Fig. 13 shows a partial cross-section of the submersible hammer of Fig. 1 in an upright view with the valve in a closed position and the cross-section taken through the through hole of the distributor.
    Fig. 14A shows a greatly enlarged partial view of the valve / distributor interface of Fig. 14.
    Fig. 14 shows an enlarged partial cross-section of the submersible hammer of Fig. 13 in an upright view with the valve in a closed position and the cross-section taken through the distributor. Fig. 15 shows an enlarged partial cross-section of a valve and a distributor of the submersible hammer according to a second preferred embodiment in an upright view; and Fig. 16 shows an enlarged partial cross-section of a valve and a distributor of a submersible hammer in accordance with a third preferred embodiment in an elevated view; DETAILED DESCRIPTION OF THE INVENTION Some words are used for convenience only in the following description and are not limiting. The words "right", "left", "upper" and "lower" generally denote directions in the figures to which they refer. For convenience, the word "distal" refers to the end of the drill bit on the plow hammer, and "proximal" generally refers to the top closure of the plow hammer as shown in Figure 1. Furthermore, the word "one" used in the specification means "at least one".
    The terminology includes the words specifically mentioned above, but also inflections of these words as well as words of similar meaning.
    In a first preferred embodiment, the invention shows a submersible hammer 10, which is best shown in Figures 1-14. The sink hammer 10 generally comprises a housing 3 12, a drill bit 13, a piston 14, a top closure 16 and a non-return valve device 18, as shown in Figures 1, 11 and 13. The top closure 16 and the piston 14 are assembled with the housing 12 on a conventional set in accordance with the state of the art. Therefore, a detailed discussion of the assembly of the top closure 16 and the piston 14 of the submersible hammer 10 is not required for a complete first invention.
    However, the top closure 16 is constructed, as shown in Figures 2 and 3, with a gangway for connection to a drill string (not shown). The gangway includes gangway 16a. The top closure 16 also includes passages 16b for gangway connection to the housing 12 (Figure 11). An inlet opening 20 extends through the top closure 16 and communicates with an inside 16c of the top closure 16 (Figure 3).
    The non-return valve device 18 (Figure 11) comprises a non-return valve 19, a biasing part 21 and a distributor 22. The non-return valve 19 is configured, as can be seen in Figures 4 and 5, and operatively assembled to the distributor 22, which is best seen in Figure 11. The non-return valve 19 comprises a rod proximal spirit 19a and an open distal spirit 19b. The non-return valve 19 also includes an inside 19c having a radially feeding extending distal surface 19d at a proximal spirit of the inside 19c. The non-return valve may also include a recess 19e for receiving a seal 19f (Figure 11).
    The manifold 22 is configured, as shown at the base of Figures 6-8, and located within the housing 12, s6 which is shown at the base of Figure 11. The manifold 22 includes a shaft 24, an upper body portion 26, a lower body portion 28 and an outlet shaft 32. The distributor also includes a central cavity 34 and a plurality of openings 36. The central cavity 34 extends axially through the distributor 22 about a central axis of the distributor 22. The openings 36 are located at an inboard distance from each other along the periphery and extend in a radial direction from a surface on the inside of the central cavity 34 to an outer side of the outlet shaft 32 at the proximal spirit. The openings 36 allow fluid communication radially through the outlet shaft 32. The shaft 24 extends proximally from the upper body portion 26. The shaft has an outer diameter smaller than the outer diameter of the upper body portion 26. The shaft 24 also includes a radially extending collar 24a around a central portion along the length of the shaft 24.
    The upper body portion 26 has an outer diameter which is slightly underdimensioned in comparison with the inner diameter of the housing 12, to fit with the housing without a significant play. The upper body portion 26 includes a through hole 26a (Figure 8) extending axially through the upper body portion 26 from a proximal surface 26b to a distal surface 26c of the upper body portion 26. Preferably, the upper body portion 26 comprises a plurality of through holes 26a along the periphery and, more preferably, six (6) continuous slopes at an even spaced distance from each other along the periphery. The through Mien 26a allows fluid communication from an area above the upper body portion 26 to a region below the upper body portion 26. The distal surface 26c of the upper body portion 26 also engages a proximal end 12d of the inner 12a of the housing. to as a cylinder), while the proximal surface 26b engages a distal spirit 16d of the top closure 16 when mounted within the housing 12 (Figure 11). The assembly of the manifold 22 between the proximal duct 12d on the inside 12a of the housing and the distal duct 16d has the top closure 16 securing the position of the manifold 22 within the housing 12.
    The inside 12a of the I-16 light is preferably a separate component of the housing 12 which is assembled with the housing 12 after already being assembled. However, the inside 12a of the housing may be formed integrally, as part of the housing 12, instead of being a separate component which is sensed together with the housing.
    The lower body portion 28 of the manifold 22 is configured to substantially look like a truncated cone with a sidewall 30 extending slightly from a distal surface 28a of the truncated conical portion of the lower body portion 28. The lower body portion 28 also includes a distal surface 28b projecting radially inwardly from the sidewall 30.
    The outlet shaft 32 projects distally from a bottom portion of the lower body portion 28. The openings 36 therein are located around the proximal spirit of the outlet shaft 32. Preferably, the outlet shaft 32 includes a plurality of openings 36 and more preferably, four (4) openings 36 located along the periphery at an even inboard distance from each other.
    Referring to Figure 11, the non-return valve 19 slidably engages the shaft 24 of the manifold 22 as it is mounted. The non-return valve 19 is the father buckle to a closed position (Figure 11) for closing the inlet opening 20 which projects through the top closure 16. The non-return valve 19 is pre-tensioned to the closed layer by a pre-tensioning part 21, such as a compression spring. The biasing member 21 is located between the check valve 19 and the shaft 24 within an inside 19c of the check valve and an inside 24b of the shaft 24. In particular, the biasing member 21 has a proximal spirit engaging a distal surface 19d of the check valve 19 and a distal spirit engaging engagement with the radial food extending collar 24a.
    The submersible hammer 10 also includes a valve 38, as shown in Figures 9-11. Valve 38 is generally shaped like an upturned and nerve-wrapped cap, as shown in Figure 9, with a generally "U" shaped cross-section, as shown in Figure 10. Valve 38 includes a base portion 48 and a side wall 50 which extends from the base portion 48. The side cradle 50 has an inside 50a and an outside 50b. The base portion 48 includes a through hole 48c that extends through a central portion of the base portion 48. The valve 38 also includes a first pressure surface 40, a second pressure surface 42, a third pressure surface 44, and a valve passage 46.
    The base portion 48 may be formed with a total outer diameter TYbas which is substantially the same as the total outer diameter of the sidewall 50 TYsidewall. On the other hand, the base part 48 is preferably formed with a total outer diameter TYbas which is longer than the total outer diameter of the side wall 50 TY side wall. The longer TYbas advantageously provides a means for controlling the flow rate through the first passage without restricting the flow of work shoes to other areas of the submersible hammer 10 which communicate with a volume limited by the sidewall 50. The valve first pressure surface 40 is a distal surface of the first pressure surface 40 of the valve is also arranged aft in connection with the drive chamber 58. The second pressure surface 42 of the valve is a proximal surface of the side wall 50. The second pressure surface 42 of the valve is also arranged to be in communication with a high pressure opening of the submersible hammer 10, such as described below. The third pressure surface 44 of the valve is a proximal surface of the base part 48. The third surface 44 of the valve is also arranged to be in communication with a channel formed with and protruding through the central cavity 34 which protrudes through the distributor 22, via opening 36 which stacks radially through the outlet shaft 32, as further described below.
    The valve channel 46 is generally provided as a continuous h1 extending from at least one of an inside 50a of the side wall 50 and the third surface 44 of the valve, to the first pressure surface 40 of the valve. The valve channel 46 comprises a proximal spirit, and a distal spirit projecting radially outward, distal to the proximal spirit.
    The distal end of the valve channel 46 is arranged to be fully engaged with an upper surface 12c having the circular projection 12b when the valve is in a closed position (Figure 14). The upper surface 12c is an inner surface of the housing 12. Preferably, the valve 38 includes a plurality of valve channels 46, and more preferably, four (4) valve channels 46 along the periphery at an equal distance from each other.
    The valve 38 may also include a recess 53 around the through tail 48c and a recess 55 at the inside 50a of the cradle 50. The recesses 53 and 55 are arranged to receive seals 54 and 56, respectively, as shown in Figure 11. Seals 54 and 56 can e.g. be 0-rings made of an elastic material or some other edge material suitable for this use. As shown in Figure 11, the socket 54 is located between the outlet shaft 32 and the base portion 48 to create a tight connection between the base portion 48 and the outlet shaft 32. The socket 56 is located between the side wall 30 of the lower body portion 28 and the valve side 58 of the valve 38 to connection between the side cradle 30 and the side cradle 58.
    The valve 38 is assembled inside the submersible hammer 10 and to the manifold 22, as shown in Figure 11. The valve 38 and the manifold 22 are located inside the housing 12. The vane 12 includes an inner housing 12a which receives the lower body portion 28 of the manifold 22 and the valve 38. The inner housing 12a includes a circular projection 12b extending radially from approximately an upper region of the inner housing 12a. The inner housing 12a can e.g. be a cylinder with opening functions, in accordance with the state of the art.
    The valve 38 is mounted to the manifold 22 on such a sail that the through-hole 48c receives the outlet shaft 32 while the side wall 50 receives the lower body portion 28 of the manifold 22. In an assembled condition, the valve 38 is located above the circular projection 12b.
    The valve is arranged to stop against the outlet shaft 32 and is movable between an open position (Figure 11) and a closed position (Figure 13). In the open position, as best shown in Figure 12, the drive chamber 58 is in communication with the inlet port 20. That is, the valve 38 allows working fluid to flow through the inlet port 20, around the check valve assembly 18, down through the manifold 22 through hole 26a and around the valve 38. , passing between the first pressure surface 40 of the valve and the upper surface 12c of the circular projection 12b and into the drive chamber 58. The river trough just described shows a first passage leading from the inlet opening 20 to the drive chamber 58. The first passage also relates to a high pressure opening of the submersible hammer 10 , therefore high pressure work shoes are fed to the sledgehammer through it.
    Further, in the open position, the valve 38 is connected to the outlet shaft 32 so that an upper portion of the inner side surface 48d connects tail to openings 36 of the outlet shaft 32. In other words, the inner side surface 48d completely abuts the openings 36.
    The assembly of the valve 38 to the manifold 22 also forms a first volume 52 bounded by the valve 38 and a distal surface 28b of the manifold 22. The first volume 52 communicates with the valve channel 46. Furthermore, in the open position, the first volume 52 in connection with the drive chamber 58 via the valve duct 46.
    The first volume 52 and the cross-sectional flow area through the valve channel 46 are preferably arranged to have a ratio between [volume (inches 3)]: [area (inches 2)] 8 of approximately 20-40 (approximately 0.00032774 m 3 - 0.0258 m2). It is this relationship that preferably allows a user to adjust and control the timing of opening and closing of the valve 38 and thereby, control and adjust the overall efficiency of the sledgehammer 10. The cross-sectional area through the valve channel 46 can be adjusted, for example, by any number of valve channels 46. formed by the valve 38 or by all adjusting the total diameter of an individual valve channel 46.
    In the closed position, as shown in Fig. 14, the high pressure sap is spaced from the drive chamber 58. The valve 38 is thus rotated distally until the first valve pressure surface 40 engages the lower surface 12c of the circular projection 12b, i.e., an inner surface of the housing 12. In its position, the first passage is barred and the distal spirit of the valve channel 46 is barred by the lower surface 12c. Furthermore, the proximal spirit of the base member 48 moves distally to partially expose the openings 36, thereby allowing connection between the first volume 52 and the central cavity 34 of the manifold 22. In other words, the second passage allows connection between the first volume 52 and the drive chamber 58 when the valve is in its closed position. The openings 36 optionally allow all pressurized working volumes within the first volume 52 to be drained through the manifold 22, so that all the valve 38 can be rammed proximally and repositioned in the open position, which is further described below.
    The assembly of the valve 38 and the manifold 22 provides a first passage which allows fluid communication between the high pressure tap and the drive chamber 58, as described above. The assembly of the valve 38 and the manifold 22 also provides a second passage which allows fluid communication between the first volume 52 and the drive chamber 58 when the valve 38 is in the open position. The second passage protrudes through the valve passage 46. Finally, the assembly of the valve 38 and the divider 22 provides a third passage which allows surface connection between the first volume 52 and the central hollow 34 of the manifold 22 when the valve 38 is in its closed position. The third passage protrudes through the socket 36. 9 In operation, the piston (14 (as shown in Fig. 13) moves back and forth inside the submersible hammer 10, as a result of the operation of the valve 38 and the working fluid volumes delivered to the submersible hammer 10 via The piston 14 expressly moves between a return position, where the piston 14 has its most proximal position inside the hammer drill 10, and a striking position, where the distal spirit of the piston 14 strikes the drill bit 13. The movement of the piston 14 from the striking position to the return position is called The movement of the piston 14 from the return position to the striking position is called the drive cycle.
    During the return cycle, the valve 38 is in its closed position. However, as the piston reaches the return position during the return cycle, the pressure inside the drive chamber 58 increases due to the decreasing volume or volume contraction of the drive chamber 58 during the return cycle. The created pressure applies a force to the first pressure surface 40 of the valve which moves the valve 38 to the open position.
    The needle valve 38 moves to the open position, opens the first passage and supplies the drive chamber 58 with high pressure working volumes and moves the piston 14 towards the stroke position (i.e., initiation of the drive cycle). As the piston 14 moves distally during the drive cycle, the drive chamber 58 is pressurized via the first passage and the first volume 52 is pressurized via the second passage. However, the first volume 52 is substantially smaller than the volume of the drive chamber 58 and is pressurized faster than the drive chamber 58. Further, as the piston 14 moves distally, the volume of the drive chamber 58 expands, and as the piston 14 has passed the distal end of the outlet shaft 32, the pressure inside the drive chamber 58 the central slowness of the piston. The resulting combination of the expansion of the drive chamber 58 volume and then the emptying of the drive chamber 58 watering shoes results in a pressure difference between the pressure inside the first volume 52 and the pressure inside the drive chamber 58 to move the valve 38 from the open position to the closed position (Fig. 13) . Due to the shape of the first volume 52, the flow rate through the valve channel 46 or the total cross-sectional flow area through the valve channel 46, and the drive cycle of the piston 14, the valve 38 closes after the piston 14 moves distally by about 50-90%, and preferably about 70-80%. of the total drive cycle length. Then, after the piston 14 has reached the stroke position, the drive and return cycles are repeated with the previously described opening and closing of the valve 38.
    Fig. 15 shows a valve 138 in accordance with a second preferred embodiment of the present invention. The valve 138 is arranged substantially in the same manner as the valve 38 in the first preferred embodiment, except for the valve channel 146. The valve channel 146 is arranged to extend from at least one of the third valve pressure surface 144 and an inner side surface 150a of the side cradle 150 to an outer side surface 150b of valve 138. Preferably, the valve channel 146 is substantially horizontal. The valve channel 146 provides a fluid connection between a first volume 152 and the high pressure port as the valve 138 is in either the closed or open position.
    Fig. 16 shows a valve 238 in accordance with a third preferred embodiment of the present invention. The valve 238 is arranged in substantially the same manner as the valve 38 and the valve 138 in the first and second preferred embodiments, except for the valve channel 246. The valve channel 246 is arranged to extend from at least one of a third valve pressure surface 244 and an inner side surface 250a of the valve 238. and a distal spirit of the valve 238. In other words, the valve channel 246 extends to the first valve pressure surface 240. Preferably, the valve channel 246 is substantially vertical or parallel to the central hollow 34 of the manifold 22. As such, the valve channel 246 allows flow communication between a first volume 252 and the drive chamber 58 when the valve 238 is in either a rod or an open position. In other words, the distal spirit of the valve channel 246 is located at a distance from the upper surface 12c of the circular projection 12b, so that the salt channel 246 is not closed or thanked by the inner housing 12a when it is in the closed position.
    Valves 138 and 238 in the second and third preferred embodiments operate on substantially the same sail as valve 38 in the first preferred embodiment.
    It will be apparent to one skilled in the art that modifications may be made to the proposed embodiments without departing from their broad inventive concept. It is to be understood, therefore, that the invention is not limited by the proposed embodiments but is intended to appreciate modifications within the spirit and scope of the present invention as defined in the appended claims. 12
    权利要求:
    Claims (14)
    [1]
    1. a first valve pressure surface (40), for engaging an inner surface has the housing (12) when the valve is in the closed position and in connection with the drive chamber (58),> a second valve pressure surface (42), in fluid communication with the high pressure opening, 2 a third valve pressure surface (44, 144, 244) in connection with a passage formed by and protruding through the distributor (22) via flake of the openings (36) and, • a valve channel (46, 146, 246), which stacks through the valve between at least one of an inner side surface (50a, 150a, 250a) of a side wall (50, 150) of the valve and the third valve pressure surface (44, 144, 244), and at least one of the first valve pressure surface (40), an outer side surface (50b, 150b) of the valve, and a distal spirit has the valve, and in river communication with a first volume (52), which first volume (52) is formed by the distal surface (28b) has the carriage divider (22) and the third valve pressure surface (44, 144, 244). 13
    [2]
    The pressure switching valve device according to claim 1, wherein the valve channel (46, 146) is closed by the inner surface of the housing (12) when the valve is in the closed position.
    [3]
    The pressure switching valve device according to claim 1, wherein the valve channel (46, 146, 246) is in flush connection with the first volume (52) and the drive chamber (58) when the valve (38, 138, 238) is in the open or closed position.
    [4]
    The pressure shift valve assembly of claim 1, wherein the valve passage (146) projects from at least one of a third valve pressure surface (144) and an inner side surface (150a) of the side cradle (150) to the outer side surface of the valve (138), the valve passage (146) ) is connected to the first volume (52) and the high pressure opening when the valve (138) is in the open or closed position.
    [5]
    The pressure switching valve device according to claim 1, wherein the inner surface of the housing (12) is a radially extending portion (12b) of the housing.
    [6]
    The pressure change valve device of claim 1, wherein the first valve pressure surface (40) comprises a distal surface and the third valve pressure surface (44) comprises a proximal surface.
    [7]
    The pressure shift valve assembly of claim 1, wherein the pressure shift valve assembly further comprises a second passageway, the plurality of openings (36) extending in the radial direction from an inner surface of the central cavity (34) to an outer surface of the outlet shaft (32) at its proximal wherein the valve (38), when the valve (38) is in its open position, is in engagement with the outlet shaft (32) so that an inner side surface (48d) of the valve is in engagement with the openings (36) of the outlet shaft (32), the inner surface (48d) completely and the Wallet thanking the number of openings (36), and the valve (38), when the valve (38) is in its closed position, being moved distally & partially exposing the openings (36) ), the second passage allowing a river connection between the first volume (52) and the drive chamber (58). 14
    [8]
    The pressure switching valve device of claim 1, wherein the pressure switching valve device further comprises a first passage allowing flow connection between the high pressure port and the drive chamber, the valve (38) being arranged to advance between an open position, the first passage allowing river connection between the high pressure port (58) , and a closed position, the first pressure surface (40) engaging the inner surface of the housing (12) and preventing river connection in the first passage between the high pressure opening and the drive chamber (58).
    [9]
    The pressure switching valve device according to claim 1, wherein the distributor (22) comprises: - an upper body part (26), and - a lower body part (28) having a side cradle, the outlet shaft protruding distally from the lower body part, the valve (38, 138, 238) comprises: a base portion (48) having a proximal surface, a distal surface and a through-hole for receiving the outlet shaft (32), the side wall (50) extending from the base portion (48).
    [10]
    The pressure switching valve device according to claim 9, wherein the base portion (48) of the valve (38, 138, 238) is in engagement with the outlet shaft (32) and the inner side surface (50a) of the side wall (50) of the valve is in engagement with the side wall at the lower body portion (28) of the manifold (22).
    [11]
    The pressure switch valve assembly of claim 9, wherein the valve passage (46, 146, 246) extends from at least one of the proximal surface of the base portion (48) and the inner side surface (50a) of the side wall (50) to the distal surface of the base portion (48). ).
    [12]
    The pressure switching valve assembly of claim 9, wherein the valve passage (46, 146, 246) extends from the inner side surface (50a) to the outer side surface (50b) of the side wall (50) of the valve (38, 138, 238).
    [13]
    The pressure switch valve assembly of claim 9, wherein the valve passage (46, 146, 246) extends in a direction from at least one of the proximal surface of the base portion (48) and the inner side surface (50a) of the side wall (50) radially outward and distal.
    [14]
    The pressure relief valve assembly of claim 9, further comprising a first seal (54) located between the central through hole of the base member (48) and the outlet shaft (32), and a second seal (56) located between the side wall of the lower body member (28) and the side wall of the valve (38). 16 1/8 13 2/8 16 1 6a 16b
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    同族专利:
    公开号 | 公开日
    US20110297447A1|2011-12-08|
    KR20110133441A|2011-12-12|
    ZA201103973B|2012-07-25|
    KR101527760B1|2015-06-10|
    AU2011202481A1|2011-12-22|
    SE1150504A1|2011-12-05|
    CA2742024A1|2011-12-04|
    AU2011202481B2|2014-07-17|
    CA2742024C|2014-05-20|
    US8631884B2|2014-01-21|
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    申请号 | 申请日 | 专利标题
    US12/794,314|US8631884B2|2010-06-04|2010-06-04|Pressure reversing valve assembly for a down-the-hole percussive drilling apparatus|
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