• 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:
    This air blow gun (1) comprises a body (2), comprising an upstream duct (20b) which extends along a first axis (X20b) and an downstream duct (20a) of air ejection, and a hole (22), which extends along a second axis (Y22), a closure member (16), which is movable in translation within the hole between a closed position and an open position, a trigger (4) which is manipulable between a relaxed configuration, where it keeps the closure member in the closed position and a blow configuration, and means (8) for returning the trigger to its relaxed configuration. This blower further comprises a tubular sleeve (14), which is immobilized inside the upstream duct (20b), which extends parallel to the first axis (X20b) and which delimits an air passage while the closing member (16) in closed position, is adapted to close an orifice of the air passage forming with the sleeve a sealed contact.
    公开号:FR3019066A1
    申请号:FR1452825
    申请日:2014-03-31
    公开日:2015-10-02
    发明作者:Alain-Christophe Tiberghien；Antoine Chambaud
    申请人:Staeubli Faverges SCA；
    IPC主号:
    专利说明:

    [0001] The invention relates to a compressed air blowgun, used for example in a workshop to expel air on machined parts covered with chips, clean or dust machines and workstations. The compressed air guns are powered by a pneumatic network with various connection points distributed in the workshop. The blowers are portable and the air blowing through the blower is activated by squeezing a trigger. These blowguns include a mechanism for selective opening of the passage of the compressed air, which is controlled by the trigger. Operators use in practice these blowers a dozen times a day, which severely solicits the mechanism of opening and closing the passage of compressed air. IT-B-1 097 346 discloses a compressed air blower comprising a main body, which is traversed by a duct for the passage of compressed air and which has a hole opening obliquely in this duct. A closure member is movable in translation within the hole between a closed position where the air passage duct is sealed and an open position where the air can circulate. The displacement of the closing member is controlled by a trigger, which is manipulable by the operator between a relaxed configuration, where it keeps the closure member in the closed position, and a blowing configuration, where the air can circulate. in the conduit. In addition, the blower comprises another valve, which is disposed downstream of the closure member in the duct for the passage of compressed air and which is designed to block the passage of air in case of overpressure according to a section. circular sealing.
    [0002] The major disadvantage of this blower is that the conduit for the passage of compressed air is relatively congested by all the constituent parts of the two valves and that the actuation of the pressure relief valve is against the pressure of the pressure. network, resulting in accelerated degradation of parts. In addition, three channels are necessary to make the pressure relief valve, which involves a complex machining of the body of the gun. On the other hand, DE-A-88 05 752 also discloses a compressed air blower, with which it is possible to expel alternately hot air or cold air. This blower comprises a connection piece to the pneumatic network and a conduit for the passage of compressed air into the body of the blower. A hole opens obliquely in the conduit for the passage of compressed air and a closure member is movable in translation inside the hole. This closure member carries at its end a nozzle shaped to seal the passage of air into the hole. When the blow gun is at rest, this nozzle bears on a seat to prevent the infiltration of air into the hole in a circular sealing section. The closure member can be moved inside the hole by pulling a trigger. Upon actuation of the trigger, the tip of the closure member takes off from its seat and the compressed air can infiltrate the hole. This tip is also subjected to an elastic return spring to return to the sealed position when the trigger is released. In total, four air passage channels are machined in the body of the gun, which is expensive to achieve. In addition, the opening of the valve is against the pressure of the compressed air, which can cause, in case of high pressure, a sudden and difficult opening of the passage and does not allow blowing of the air. air in a progressive and controlled way. It is to these drawbacks that the invention more particularly intends to remedy by proposing a simplified air-blower. For this purpose, the invention relates to a compressed air blower, comprising: a body, comprising a duct for the passage of compressed air, including an upstream duct which extends along a first axis and a downstream duct for ejection of air, and a hole, which extends along a second axis and which opens obliquely in the upstream duct, - a closure member, which is movable in translation, parallel to the second axis, inside the hole between a closed position, where it blocks the passage of air in the duct and an open position, where the air is free to circulate between the upstream duct and the downstream duct, - a trigger for controlling the displacement of the closure, which is manipulable between a relaxed configuration, where it holds the closure member in the closed position and a blow configuration, where the closure member is in the open position, - means for returning the trigger to its relaxed configuration .
    [0003] According to the invention, this blower further comprises a tubular sleeve, which is immobilized inside the upstream duct, which extends parallel to the first axis and which delimits an air passage, whereas the organ closing, in the closed position, is adapted to close an orifice of the air passage forming with the sleeve a sealed contact.
    [0004] Thanks to the invention, only the duct for passage of compressed air and the hole opening into this duct require machining in the body of the blower, which greatly simplifies the manufacture of the body of the blower. In addition, only two internal parts are required to seal in the closed position that can be mounted without a screwing operation. According to advantageous but non-mandatory aspects of the invention, a compressed air blower may incorporate one or more of the following features, taken in any technically permissible combination: - The sleeve defines a contact surface with the closure member, which is disposed in an oblique plane relative to a plane perpendicular to the first axis. - The contact surface of the sleeve is an annular surface having elliptical inner and outer contours. - The sleeve and the closure member each comprise a beveled edge and in that the contact surface of the sleeve is defined on its beveled edge. - The contact surface of the sleeve comprises a relief, which forms a sealing surface with the closure member when the latter is in the closed position. - The blower comprises a connection end to a compressed air supply tube, this end being adapted to be fixed to the body of the blower and being adapted to cooperate sealingly with one end of the sleeve opposite the hole. The blower comprises means for immobilizing the abutment in the upstream duct, which comprise a rider which is immobilized in a housing of the body by the trigger return means and which cooperates with a peripheral groove of the abutment for block the sliding of the abutment inside the upstream duct. - The closure member is held in the closed position by a trigger of the trigger, which bears against one end of the closure member opposite the upstream conduit and in that the pusher acts on the closure member according to the second axis of the hole. The blower comprises means for immobilizing the sleeve in rotation inside the upstream duct, which comprise a longitudinal rib carried by the sleeve and a groove for receiving this rib formed in the body of the blower. The trigger comprises means for driving the translation member in translation towards its open position and in that these means comprise at least one housing for receiving a projecting base of the closure member, and in that the projecting base is disposed at an end opposite the upstream duct and is engaged in the housing or the housing of the trigger with an axial clearance, measured parallel to the second axis of the hole, between the base of the closure member and a contact edge of the accommodation (s). - The receiving hole of the closure member extends along its second axis perpendicularly to the first axis of the upstream conduit. - The sleeve is elastic material, in particular plastic or rubber. The invention and other advantages thereof will appear more clearly in the light of the following description of three embodiments of a compressed air blower in accordance with its principle, given solely by way of example and made with reference to the drawings in which: - Figure 1 is a perspective view of a compressed air blower according to the invention, wherein a body of the gun is shown in half-section, - Figure 2 is a sectional view. of the blower of FIG. 1, in which the blower is shown in a rest configuration, or unused, FIG. 3 is a section similar to FIG. 2, in which the blower is shown in a blowing configuration, FIG. 4 is a section on a larger scale along line IV-IV in FIG. 3; FIG. 5 is a section on a larger scale along the line VV in FIG. 3; FIG. 6 is a section on a larger scale; according to the VI-VI in FIG. 3; FIG. 7 is a perspective view of a sleeve belonging to the blow gun of the preceding figures; FIG. 8 is a perspective view of the blow gun of the preceding figures, which is shown with FIG. a part torn off to show a set of movement of a closure member inside the blower, - Figure 9 is a section similar to Figure 2 of a compressed air blower according to a second embodiment of the invention, and - Figure 10 is a partial sectional view showing a third embodiment of a compressed air blower according to the invention. In Figure 1 is shown a compressed air gun 1, used to expel air on machined parts covered with chips, clean or dust machines and workstations. In this document, the "upstream" and "downstream" directions must be interpreted with respect to the flow of air flowing in the blower 1.
    [0005] This gun 1 has the appearance of a pistol and comprises a main body 2. The body 2 is bent, that is to say it comprises an upstream portion 2b which extends in a slightly deflected direction relative to at a downstream part 2a. In operation, the downstream part 2a is directed towards the part to be cleaned and the upstream part 2b is directed towards a source of compressed air. The body 2 is traversed by a conduit 20 for the passage of compressed air. This duct 20 comprises a downstream duct 20a and an upstream duct 20b which are delimited respectively in the downstream portion 2a and the upstream portion 2b of the body 2. The downstream duct 20a is an air ejection duct while the upstream duct 20b is an air injection duct. The ducts 20a and 20b respectively extend along axes X20a and X20b which are concurrent and which form between them an obtuse angle, approximately equal to 120 °. The body 2 also defines a hole 22 which opens obliquely in the conduit 20b. In particular, the hole 22 is hollowed perpendicularly to the conduit 20b, that is to say that it extends along an axis Y22 perpendicular to the axis X20b. The hole 22 opens at a downstream end of the conduit 20b, that is to say close to the upstream end of the conduit 20a. The hole 22 is a bore, that is to say it has a cylindrical wall. The axes Y22 and X20b, respectively of the hole 22 and the upstream duct 20b, are perpendicular, which is considered as a configuration where the hole opens, along its axis, obliquely in the air duct - by relative to the axis of the duct. A trigger 4 is hingedly mounted relative to the body 2. This trigger 4 triggers the expulsion of air by the blower 1. The trigger is such that a manipulable lever with one hand. The trigger 4 is rotatably mounted around a shaft 6 which extends along an axis Z6. The axis Z6 thus forms an axis of rotation of the trigger 4 relative to the body 2. The axis Z6 is perpendicular to both the X20b and Y22 axes. In Figure 1, the trigger 4 is shown in a relaxed configuration, where the expulsion of air through the gun 1 is blocked. By pulling the trigger 4, the trigger 4 goes into a blowing configuration, where the air is expelled from the blower 1.
    [0006] The blower 1 is enterable by an operator regardless of the right hand or the left hand. When grasping, the operator places the palm of his hand against the part 2a of the body 2 and places his fingers around the trigger 4. Reminder means maintain the trigger 4 in relaxed configuration. These return means include a helical spring 8. The trigger 4 is provided to tilt around the shaft 6 against the elastic force exerted by the spring 8. In other words, the spring 8 is compressed when the operator pulls the trigger 4. The spring 8 extends between the trigger 4 and the body 2. It is centered on an axis Y8 which is substantially perpendicular to the axis X20b. A sleeve 14 is immobilized inside the conduit 20b of the body 2. This sleeve 14 is better visible in Figure 7, where it is shown alone. The sleeve 14 is hollow and comprises two opposite orifices 014 and 0'14 for the passage of compressed air. The orifices 014 and 0'14 are respectively disposed at the downstream and upstream ends of the sleeve 14. The sleeve 14 is generally tubular and is centered on an axis X14 which is parallel or even coincident with the axis X20b in the configuration installed in the conduit 20b . The sleeve 14 thus extends parallel to the axis X20b and comprises an edge 140 bevelled. This edge 140 is a downstream edge of the sleeve 14 and has a surface S140. This surface S140 is an annular surface having elliptical outer and inner contours. The surface S140 of the edge 140 has a relief 142, which extends around the orifice 014. This relief 142 delimits the contour of the orifice 014. In operation, the compressed air passing through the conduit 20 circulates to the Inside the sleeve 14. The sleeve thus delimits an air passage P14 which extends between the two orifices 014 and 0'14 of the sleeve 14. The air passage P14 is a central or internal passage of the sleeve 14, which connects the upstream duct and the downstream duct of the blower. The orifices 014 and 0'14 constitute the opposite ends of the passage P14.
    [0007] Furthermore, the sleeve 14 is elastically deformable, especially at the surface S140 and the relief 142. The sleeve 14 is preferably made of an elastic material, such as plastic or rubber. It may also be made of a rigid material and comprise, at the beveled edge 140, an elastic ring instead of the relief 142.
    [0008] The sleeve 14 comprises a collar 144 for positioning the sleeve 14 inside the conduit 20b. Indeed, in assembled configuration of the sleeve 14 in the conduit 20b, the collar 144 abuts against a shoulder 24 of the body 2. This shoulder 24 is directed towards the inside of the conduit 20b and causes a reduction of the section of the conduit 20b in the downstream direction. Thus, the sleeve 14 is immobilized in translation. The sleeve 14 also comprises a rib 146 which extends, parallel to the axis X14, from the collar 144 and towards the beveled edge 140. This rib 146 is an angular indexing rib of the sleeve 14 to the inside the conduit 20b. Indeed, this rib 146 is provided to be inserted into a corresponding groove 26 formed in the conduit 20b. In this way, the sleeve 14 is immobilized in rotation inside the conduit 20b in the required angular position.
    [0009] The sleeve 14 comprises an upstream end 148 of connection with an end 12: this end of the sleeve, opposite the hole 22 is adapted to cooperate sealingly with the inner surface of the end 12 by fitting of the two elements. The end 12 connects the blower 1 to a compressed air supply pipe, which is not shown in the figures. The connection between the end 12 and the compressed air supply pipe is a male / female type connection. The end 12 extends along an axis X12 which is parallel, or even coincident with the axis X20b. The end 12 passes the body 2 and is immobilized inside the conduit 20b by means of a jumper 10, which makes it possible to fix it to the body 2.
    [0010] As can be seen in FIG. 6, the jumper 10 is of symmetrical shape with respect to the axis Y8. The jumper 10 "overlaps" the end 12, that is to say that it is mounted around a peripheral groove 120 dug in the end 12. More specifically, it comprises a rounded wall 102, which is complementary of the groove 120 and which surrounds more than half of the circumference of the groove 120. In this way, the rider 10 and the abutment 12 are secured in translation along the axis X12 due to the elasticity of the rider. However, as shown in Figure 3, the jumper 10 is inserted with a small clearance in a through housing 28 formed in the body 2. This housing 28 extends parallel to the axis Y8 and allows to immobilize the rider 10 in translation along the X12 axis. Therefore, the jumper 10 prevents the end 12 from sliding in the conduit 20b. The jumper 10 also comprises two shoulders 104, which are oriented towards the trigger 4, opposite to the rounded wall 102. In the direction of the trigger 4, the shoulders 104 reduce the width of the jumper 10, this width being measured parallel to the Z6 axis. One end of the spring 8 bears on these shoulders 104, the other end of the spring 8 being supported against two shoulders of the trigger 4. Thus, the rider 10 is kept pressed into its housing 28, that is to say against the end 12 by the elastic force exerted by the spring 8. Otherwise formulated, the rounded wall 102 is held in the groove 120. A closure member 16 is disposed inside the hole 22 of the body 2. This member closure 16, also called "piston", is generally cylindrical in shape and extends along an axis Y16 parallel, or even coincident with the axis Y22 on which is centered the bore 22. The closure member 16 is movable in translation parallel to the axis Y22 between a closed position, where it blocks the passage of air in the conduit 20 and an open position, where the air is free to flow between the upstream conduit 20b and the downstream conduit 20a. In the open position, which is a blow position, the blow gun 1 expels air.
    [0011] The closure member 16 is provided to cooperate with the sleeve 14 in the closed position. For this purpose, the member 16 comprises a beveled edge 166 which is complementary to the beveled edge 140 of the sleeve 14, that is to say that the edge 166 is configured to bear flat against the edge 140 in the closed position. The edge 166 is a solid elliptical edge, configured to come into sealing contact with the edge 140 of the sleeve 14 in the closed position. More specifically, the beveled edge 166 of the closure member 16 is adapted to close the orifice 014 of the passage P14 in the closed position, forming with the sleeve 14 a sealed contact. In this position the compressed air is no longer free to circulate between the upstream duct and the downstream duct. The surface S140 of the edge 140 thus forms a contact surface between the sleeve 14 and the member 16. Although not shown, the invention provides that the edge 166 of the closure member 16 and the edge 140 of the sleeve 14 can be concave, convex or otherwise irregular, but complementary to cooperate and form a sealing contact surface in the closed position of the closure member 16. These edge configurations 166 and 140 have a contact surface generally disposed in an oblique plane P1 by relative to a plane P2 perpendicular to the conduit 20b. The contact between the sleeve 14 and the member 16 is all the more tight because of the presence of the relief 142, which ensures the deformation of the elastic sleeve around the orifice 014 over its entire periphery. Indeed, during the contact between the sleeve 14 and the closure member 16, the sleeve 14 is resiliently biased in compression in its axial direction X14 due to the presence of the relief 142. Thus, the sleeve 14, seeking to resume its initial form by springback, exerts on the closure member 16 an opposite force directed parallel to the axis X14, which ensures a tight contact with the member 16. The closure member therefore has, by its relief 142, a deformable contact surface which seals the entire periphery of the orifice 014. The contact surface S140 between the sleeve 14 and the closure member 16 is an annular surface, which ensures an optimum seal . This surface has elliptical inner and outer contours and is disposed very close to a plane P1, or in a plane P1 oblique with respect to a plane P2 perpendicular to the conduit 20b. More specifically, the plane P1 marks with the plane P2 an angle Al approximately equal to 45 °. However, the angle Al is in practice between 20 ° and 70 °. The inner contour of the annular surface is such that an ellipse of width a and of length b for a sleeve whose passage diameter is of value a. For a sleeve whose plane P1 is at 45 °, the length of! Ellipse will be equal to b = a - / 2. In this configuration which is a preferred configuration, the contact area will be at least equal to the area of the inner ellipse such that a / 2 x b / 2 x [1, ie a2 x - / 2 x jI x 0.25. In known configurations, where the seal is formed perpendicularly to the fluid passage, whose circular passage diameter is of value a, the sealing surface is equal to (a / 2) 2 x jI = a2 x jI x 0.25. For the same diameter of passage, the sealing surface made at the end of a 45 ° bevel sleeve is therefore multiplied by - i2, an increase of about 41%. This configuration thus makes it possible to increase the sealing perimeter in a non-negligible way without increasing the bulk of the passage ducts and to deform the sleeve in an optimized manner to facilitate the sealing engagement of the closure member. The closure member 16 comprises a base 160 which is opposite the beveled edge 166 along the axis Y16. This base 160 protrudes peripherally with respect to the rest of the body of the closure member 16. It is generally rectangular and bears against a pusher 40 of the trigger 4. The pusher 40 is a protruding portion of the trigger 4 directed towards the body 2. The closure member 16 comprises, approximately in the middle, a peripheral groove 162 for receiving a seal 164. This seal 164 makes it possible to prevent air from occurring. infiltrates into the hole 22 in operation. A single seal is used in the construction of the gun 1, which facilitates assembly.
    [0012] As can be seen in FIG. 4, the rectangular base 160 of the closing member 16 is partially engaged in two transverse housings 44 delimited in the trigger 4. The housings 44 are opposite one another with respect to one another. P3 plane of the gun and in a direction parallel to the axis Z6. The plane P3 is a plane perpendicular to the plane P2 and to the axis Z6, which contains the axes Y16 and Y22. The plane P3 is also the cutting plane of the blower 2 in FIGS. 1 to 3. These housings 44 are rectangular openings disposed on either side of the member 16. They have a width, measured parallel to the Y16 axis, which is greater than the thickness of the base 160. Thus, a set of contact J exists between the base 160 and a contact edge 440 of the housing 44. The edge 440 is the edge of the housing 44 closest to the upstream duct 20b and which is opposed to the pusher 40. The edge 440 is the edge capable of coming into contact with the base 160 of the member 16 during the actuation of the trigger 4. In the example of the figures, the edge 440 is the edge of housing 44 closest to base 160, but it may be different. The contact clearance J is an axial clearance which changes as a function of the disposition of the base 160 in the housings 44. In the closed position, this clearance J is of the order of 0.5 mm.
    [0013] The axial clearance J available to the closure member 16 inside the hole 22 allows it to make optimal contact, that is to say, as tightly as possible, with the sleeve 14 in the closed position. . As explained above, in the case where the sleeve 14 is rigid, it carries at its bevelled edge 140 an elastic ring. This elastic ring is compressed during contact with the closure member 16 to obtain a tight contact between the two parts, and a maximum seal. Furthermore, the closure member 16 is guided in translation in the duct 22. Indeed, as shown in Figure 5, the rectangular base 160 is received in a cavity 42 of the trigger 4. This cavity 42 generally follows the shape of the base 160, so that the closing member is immovable in rotation about the axis Y16 inside the hole 22. In addition, the base 160 comprises two shoulders, which delimit a portion 160a of width, measured parallel to the Z6 axis, narrowed relative to the remainder of the base 160. This allows to properly index the closure member 16 inside the hole 22, that is to say to position the body angularly closure 16 so that its beveled edge 166 is in perfect plane contact with the edge 140 of the sleeve 14 in the closed position. At rest, that is to say in the configuration of Figures 1 and 2, the spring 8 exerts on the trigger 4 a force F3 directed along the axis Y8. This elastic load F3 tends to tilt the trigger 4 around the shaft 6 in a clockwise direction in Figure 2. However, the movement of the trigger 4 is limited in this direction by the body 2. Therefore, the push member 40 presses the closure member 16 in a direction F4 directed parallel to the axis Y16, and in the direction of the conduit 20b. The support force F4 of the pusher 40 on the closure member 16 keeps the closure member 16 in the closed position under the pressure of the compressed air. Indeed, the compressed air coming from the abutment 12 exerts a pressure F5 on the beveled edge 166 of the closure member 16 and causes pressure forces on the contact surface 166 of the closure member 16 which generate a component of force along the axis Y16 in the direction of the pusher 40. The closure member 16 behaves like a wedge, that is to say that the pressure exerted by the compressed air in the conduit 20b on the member 16 tends to move the closure member 16 in a direction opposite to the conduit 20 and along the axis Y16. However, the support force F4 of the pusher 40 is preponderant in front of the pressure F5 of the compressed air exerted on the closure member 16, so that the trigger 4 can not rock alone towards the body 2 , ie in blowing configuration.
    [0014] To expel compressed air, the user pulls the trigger 4 by clenching his fist. Thus, the trigger 4 leaves its relaxed configuration and pivots around the shaft 6 against the spring loading force F3 of the spring 8, as represented by the arrows F1 and F2 in FIG. 2. By pivoting, the pusher 40 moves away from the closure member 16, that is to say it no longer exerts a retention force F4. Thus, if the pressure of the compressed air injected into the duct 20 is sufficient, the closure member 16 is driven in translation in a direction F7. This direction F7 is oriented parallel to the axis Y16 due to the presence of the beveled edge 166, which acts as a wedge. The displacement of the closure member 16 in the direction F7 causes the rupture of the sealing contact between the closure member 16 and the sleeve 14. The air can circulate, as represented by the arrows F6 in FIG. in the case where the air pressure injected into the conduit 20b is insufficient, the closure member 16 is however driven by the trigger 4 in translation in the direction F7. Indeed, during the tilting of the trigger 4 towards the body 2, the clearance J existing between the base 160 of the closure member 16 and the housing 44 of the trigger 4 is overtaken and the base 160 comes into contact with the edges 440 of the housing 44, which causes the closing member 16 in translation. The advantage of using a closing edge 166 of the inclined conduit 20 ensures that the displacement of the closure member 16 is not in opposition to the pressure of the compressed air injected into the end 12. Thus, the pressure of the compressed air accompanies the movement of the closure member 16 between its closed position and its open position. The operator does not have to force to squeeze the trigger 4 and the gun 1 is easily manipulated. In other words, the forces required to open the conduit 20 must not overcome the pressure force F5 exerted by the air upstream and the operator does not act against the pressure of the network when he wishes to expel air by the blower. As a result, the blowing can be carried out in a progressive and controlled manner. The tightening of the trigger 4 brings the blower 1 into the configuration of FIG. 3. The trigger 4 is then in the blowing configuration, where the air circulates in the duct 20. When the operator has finished using the 1, the gun releases the pressure on the trigger 4. The trigger 4 then returns to its relaxed configuration under the spring return force F3 of the spring 8. The spring 8 relaxes. Thus, the trigger 4 pivots around the shaft 6 and the pusher 40 presses the closure member 16 to drive it in translation inside the hole 22 until it comes into contact with the edge Beveled 140 of the sleeve 14. The sleeve 14 and the closure member 16 are then again in sealing contact and the passage of air in the orifice 014 of the sleeve 14 is blocked. In Figure 9 is shown a second embodiment of a compressed air blower according to the invention. For the sake of brevity, only the different elements of the first embodiment are described below. In addition, the elements that are identical or that operate in a similar manner with respect to the blower of the first embodiment retain their numerical reference while the additional elements or elements that operate differently with respect to those of the first embodiment carry other numerical references. . The air-blower 1 of FIG. 9 differs from that of the first embodiment in that the body 2 comprises a handle 30 for handling the air-blower 1. This handle 30 makes it easier to grip the blower 1 In addition, the blower 1 comprises a body 2 having a bent portion 2a on which a nozzle 36 is snapped. Snap-fastening means that it may be an elastic locking mechanism on assembly, a pin or peripheral claws of the nozzle configured to penetrate into a curvilinear groove or bent body. The nozzle 36 may also be screwed to the end of the bent portion 2a of the body 2. In addition, the blow gun 1 of this embodiment comprises a butt 38 which is also snapped inside the body 2. The advantage of this embodiment is that the nozzle is interchangeable and allows in particular to adapt the shape of the jet. FIG. 10 shows a third embodiment of a compressed air gun 1. In this third embodiment, the gun 1 comprises a body 2 also comprising a handling handle 30. In addition, the gun 1 comprises a nozzle 1 compressed air ejection which is carried out in two parts. Indeed, a first portion 34 is snapped onto a bent portion 2a of the body 2 and a second portion 32 is inserted into a conduit 20a of the bent portion 2a and is immobilized by the portion 34 by means of retaining means belonging to Part 34. In variant not shown, the end 12 is integral with the body 2.
    [0015] In variant not shown, the housings 44 are blind. In variant not shown, the closure member 16 can be movable in a hole which opens into the conduit 20b upstream relative to the sleeve 14, and close the upstream edge 148 of the sleeve 14 and not the downstream edge 140 as previously presented.
    [0016] As a variant not shown, the closure member 16 may not have a beveled edge but an edge perpendicular to its axis and extend along a translation axis perpendicular to the contact surface S140 of the beveled edge of the sleeve 14. Alternatively not shown, the sleeve 14 may not have beveled edge and the contact surface S140 may be such that an annular surface having circular inner and outer contours. In variant not shown, the closure member 16 has a slight play in rotation about its axis X16, which can improve the contact with the sleeve 14, that is to say, catch up with a possible lack of coplanarity between the contact surfaces of the sleeve 14 and the member 16. The technical features of the variants and embodiments envisaged above can be combined with one another to generate new embodiments of the invention.
    权利要求:
    Claims (12)
    [0001]
    CLAIMS1.- Air-blower (1), comprising: a body (2), comprising a conduit (20) for the passage of compressed air including an upstream duct (20b) which extends along a first axis (X20b) and an air ejection duct (20a), and a hole (22), which extends along a second axis (Y22) and which opens obliquely in the upstream duct (20b), a closure member (16), which is movable in translation, parallel to the second axis, inside the hole between a closed position, where it blocks the passage of air in the duct and an open position, where the air is free of circulating between the upstream duct and the downstream duct, a trigger (4) for controlling the movement of the closure member, which can be manipulated between a relaxed configuration, where it keeps the closure member in the closed position and a blowing configuration , where the closure member is in the open position, - means (8) for returning the trigger towards its co releasable nfiguration, characterized in that it further comprises a tubular sleeve (14), which is immobilized within the upstream duct (20b), which extends parallel to the first axis (X20b) and which delimits a air passage (P14) and in that the closing member (16), in the closed position, is adapted to close an orifice (014) of the air passage (P14) forming a sealed contact with the sleeve.
    [0002]
    2. A blower according to claim 1, characterized in that the sleeve (14) defines a contact surface (S140) with the closure member (16), which is arranged in a plane (P1) oblique with respect to a plane (P2) perpendicular to the first axis (X20b).
    [0003]
    3. A blower according to claim 2, characterized in that the contact surface (S140) of the sleeve (14) is an annular surface having elliptical inner and outer contours.
    [0004]
    4. A blower according to one of claims 2 and 3, characterized in that the sleeve (14) and the closure member (16) each comprise an edge (140, 166) bevelled and in that the surface contact (S140) of the sleeve is delimited on its beveled edge.
    [0005]
    5. A blower according to one of claims 2 to 4, characterized in that the contact surface (S140) of the sleeve comprises a relief (142), which forms a sealing surface with the closure member (16). when it is in the closed position.
    [0006]
    6. A blower according to one of the preceding claims, characterized in that it comprises an end (12) for connection to a compressed air supply tube, this end being adapted to be fixed to the body (2) of the blower and being adapted to cooperate sealingly with one end (148) of the sleeve (14) opposite the hole (22).
    [0007]
    7. A blower according to claim 6, characterized in that it comprises means (10, 8, 28) for immobilizing the abutment (12) in the upstream duct (20b), which comprise a jumper (10) which is immobilized in a housing (28) of the body by the return means (8) of the trigger and which cooperates with a peripheral groove (120) of the end (12) to block the sliding of the end to the inside the upstream duct (20b).
    [0008]
    8. A blower according to one of the preceding claims, characterized in that the closure member (16) is held in the closed position by a pusher (40) of the trigger (4), which bears against one end ( 160) of the closure member opposite the upstream conduit and in that the pusher acts on the closure member along the second axis (Y22) of the hole.
    [0009]
    9. A blower according to one of the preceding claims, characterized in that it comprises means (24, 146) for immobilizing the sleeve (14) in rotation inside the upstream duct (20b), which comprise a longitudinal rib (146) carried by the sleeve and a groove (24) for receiving this rib formed in the body of the gun.
    [0010]
    10. A blower according to one of the preceding claims, characterized in that the trigger (4) comprises means (44) for driving the closure member (16) in translation towards its open position and in that these means comprise at least one housing (44) for receiving a protruding base (160) of the closure member, and in that the projecting base (160) is disposed at an end opposite the upstream conduit (20b) and is engaged in the housing (s) (44) of the trigger (4) with an axial clearance (J), measured parallel to the second axis (Y22) of the hole, between the base (160) of the closure member and an edge of contact (440) of the housing (44),
    [0011]
    11. A blower according to one of the preceding claims, characterized in that the hole (22) for receiving the closure member (16) extends along its second axis perpendicularly to the first axis (X20b) of the duct. upstream (20b).
    [0012]
    12. A blower according to one of the preceding claims, characterized in that the sleeve (14) is of elastic material, in particular plastic or rubber.15.
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    同族专利:
    公开号 | 公开日
    TWI649127B|2019-02-01|
    KR20150113904A|2015-10-08|
    KR102357230B1|2022-01-28|
    CA2886172A1|2015-09-30|
    DK2926912T3|2017-10-23|
    TW201600173A|2016-01-01|
    CN104941836A|2015-09-30|
    ES2645213T3|2017-12-04|
    US9511380B2|2016-12-06|
    MX2015003884A|2015-09-29|
    EP2926912B1|2017-09-06|
    US20150273485A1|2015-10-01|
    FR3019066B1|2016-04-29|
    CN104941836B|2019-10-25|
    EP2926912A1|2015-10-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4124164A|1977-07-08|1978-11-07|Armstrong Cork Company|Tamper proof safety cut-off fluid nozzle|
    FR2550474A1|1983-08-13|1985-02-15|Festo Kg|COMPRESSED AIR BLOW GUN|
    DE8805752U1|1987-08-03|1988-09-15|Marresearch|
    US6398135B1|2001-02-23|2002-06-04|Chieh-Jen Hsiao|Air spray device|
    JPS52133068U|1976-04-05|1977-10-08|
    DE2734584A1|1977-08-01|1979-02-15|Festo Maschf Stoll G|COMPRESSED AIR BLOW GUN|
    US4286755A|1979-10-15|1981-09-01|Lenco, Inc.|Valve for a sandblasting device|
    US4907744A|1988-05-03|1990-03-13|Les Produits Associes Lpa-Broxo S.A.|Oral hygiene device|
    DE202006000066U1|2006-01-02|2006-04-27|Begon, Wolfgang|Pistol for fire extinguisher has assembly of operating lever and handgrip angled in relation to body and so enables operation as with hand fire extinguisher|
    WO2007126998A2|2006-03-29|2007-11-08|Spraying Systems Co.|Hand held trigger-operated spray gun|US9726456B1|2016-04-18|2017-08-08|Li-Tang Jhu|Blow gun|
    USD812189S1|2016-05-26|2018-03-06|Guardair Corp.|Safety air gun|
    SE540737C2|2017-03-02|2018-10-23|Silvent Ab|Blow gun|
    USD865120S1|2017-05-29|2019-10-29|Silvent Ab|Compressed air gun|
    KR102141119B1|2018-07-02|2020-08-05|케맥스|Air Gun|
    法律状态:
    2015-03-17| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-27| PLFP| Fee payment|Year of fee payment: 4 |
    2018-03-26| PLFP| Fee payment|Year of fee payment: 5 |
    2019-11-29| ST| Notification of lapse|Effective date: 20191106 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1452825A|FR3019066B1|2014-03-31|2014-03-31|COMPRESSED AIR BLOW GUN|FR1452825A| FR3019066B1|2014-03-31|2014-03-31|COMPRESSED AIR BLOW GUN|
    US14/663,631| US9511380B2|2014-03-31|2015-03-20|Compressed air gun|
    CA2886172A| CA2886172A1|2014-03-31|2015-03-24|Compressed air gun|
    MX2015003884A| MX2015003884A|2014-03-31|2015-03-26|Compressed air gun.|
    EP15161599.4A| EP2926912B1|2014-03-31|2015-03-30|Compressed-air blower|
    TW104110340A| TWI649127B|2014-03-31|2015-03-30|Compressed air gun|
    KR1020150044405A| KR102357230B1|2014-03-31|2015-03-30|Compressed air gun|
    CN201510145508.5A| CN104941836B|2014-03-31|2015-03-30|Compressed ir spray gun|
    ES15161599.4T| ES2645213T3|2014-03-31|2015-03-30|Airsoft gun|
    DK15161599.4T| DK2926912T3|2014-03-31|2015-03-30|Compressed air blowing device|
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