EP2926912B1 - Luftdüse für druckluft - Google Patents

Luftdüse für druckluft Download PDF

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Publication number
EP2926912B1
EP2926912B1 EP15161599.4A EP15161599A EP2926912B1 EP 2926912 B1 EP2926912 B1 EP 2926912B1 EP 15161599 A EP15161599 A EP 15161599A EP 2926912 B1 EP2926912 B1 EP 2926912B1
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EP
European Patent Office
Prior art keywords
sleeve
closing member
conduit
trigger
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15161599.4A
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English (en)
French (fr)
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EP2926912A1 (de
Inventor
Alain-Christophe Tiberghien
Antoine Chambaud
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Staubli Faverges SCA
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Staubli Faverges SCA
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Publication of EP2926912A1 publication Critical patent/EP2926912A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers

Definitions

  • the invention relates to a compressed air blow gun, 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.
  • 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.
  • DE-A-88 05 752 which discloses the features of the preamble, 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 into the duct 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.
  • the invention more particularly intends to remedy by proposing a simplified air-blower.
  • 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.
  • FIG. 1 there is shown a compressed air gun 1, used to expel air on machined parts covered with chips, clean or dust machines and workstations.
  • 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.
  • the part downstream 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.
  • 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.
  • 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.
  • the trigger 4 is shown in a relaxed configuration, where the expulsion of air through the blower 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.
  • 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 hold 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 at the figure 7 , where he is represented alone.
  • the sleeve 14 is 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 at the figure 7 , where he is represented alone.
  • the sleeve 14 is hollow and comprises two opposite orifices O14 and O'14 for the passage of compressed air.
  • the orifices O14 and O'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 coincidental, 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.
  • the sleeve therefore delimits an air passage P14 which extends between the two orifices O14 and O'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 O'14 constitute the opposite ends of the passage P14.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 makes it possible to immobilize the jumper 10 in translation along the axis X12. 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.
  • 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 closure member 16 also called “piston”, is generally cylindrical in shape and extends along a parallel axis Y16, or even coincides with the Y22 axis 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 duct 20b and the downstream duct 20a. In the open position, which is a blow position, the blow gun 1 expels air.
  • the closure member 16 is provided to cooperate with the sleeve 14 in the closed position.
  • 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.
  • edge 166 of the closure member 16 and the edge 140 of the sleeve 14 may be concave, convex or otherwise irregular, but complementary to cooperate and form a sealed contact surface in the closed position of the closure member 16.
  • These edge configurations 166 and 140 have a contact surface generally disposed in a plane P1 oblique with respect 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.
  • the sleeve 14 is resiliently biased in compression in its axial direction X14 due to the presence of the relief 142.
  • 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 A1 approximately equal to 45 °. However, the angle A1 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.
  • the contact surface will be at least equal to the surface of the inner ellipse such that a / 2 xb / 2 x ⁇ , that is to say 2 x ⁇ 2 x ⁇ x 0.25.
  • the sealing surface made at the end of a bevel sleeve 45 ° is multiplied by ⁇ 2, an increase of about 41%.
  • 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 entering the hole 22 operation.
  • a single seal is used in the construction of the gun 1, which facilitates assembly.
  • the rectangular base 160 of the closing member 16 is partially engaged in two through-holes 44 delimited in the trigger 4.
  • the housings 44 are opposite one another with respect to a plane P3 of the blowgun 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 to Figures 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 axis Y16, which is greater than the thickness of the base 160.
  • 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 conduit 20b and which is opposite the pusher 40.
  • the edge 440 is the edge likely to come in contact with the base 160 of the member 16 during the actuation of the trigger 4.
  • the edge 440 is the edge of the housing 44 closest to the base 160, but it may be differently .
  • 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.
  • 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. .
  • the sleeve 14 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.
  • the closure member 16 is guided in translation in the duct 22. Indeed, as visible in FIG. figure 5 , the rectangular base 160 is received in a cavity 42 of the trigger 4. This cavity 42 generally matches the shape of the base 160, so that the closure member is immobile in rotation about the axis Y16 inside.
  • the base 160 comprises two shoulders, which delimit a portion 160a of width, measured parallel to the axis Z6, narrowed relative to the rest of the base 160. This allows to correctly index the body of closing 16 inside the hole 22, that is to say to angularly position the closure member 16 so that its bevelled edge 166 is perfectly in plane contact with the edge 140 of the sleeve 14 in the closed position.
  • the spring 8 exerts on the trigger 4 a force F3 directed along the axis Y8.
  • This elastic load force F3 tends to tilt the trigger 4 around the shaft 6 in a clockwise direction to the figure 2 .
  • the movement of the trigger 4 is limited in this direction by the body 2. Therefore, the pusher 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.
  • 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.
  • 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.
  • the user pulls the trigger 4 by clenching his fist.
  • the trigger 4 leaves its relaxed configuration and pivots around the shaft 6 against the load F3 elastic load of the spring 8, as represented by the arrows F1 and F2 at the figure 2 .
  • the pusher 40 moves away from the closure member 16, that is to say that it no longer exerts a retaining force F4.
  • 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 closing 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 at the figure 3 .
  • 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.
  • 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.
  • 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.
  • the blowing can be carried out in a progressive and controlled manner.
  • Clamping the trigger 4 brings the blower 1 into the configuration of the figure 3 .
  • the trigger 4 is then in the blowing configuration, where the air circulates in the duct 20.
  • the trigger 4 When the operator has finished using the gun 1, it 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 .
  • 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.
  • FIG. 9 On the figure 9 is shown a second embodiment of a compressed air blower according to the invention.
  • 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 compressed air gun 1 of the figure 9 differs from that of the first embodiment in that the body 2 comprises a handle 30 for handling the air blow gun 1.
  • This handle 30 facilitates the grip of the blow gun 1.
  • the blow gun 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.
  • 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.
  • the blower 1 comprises a body 2 also comprising a handling handle 30.
  • the blower 1 comprises an ejection nozzle of compressed air that is made 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.
  • the end 12 is integral with the body 2.
  • the housings 44 are blind.
  • 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.
  • 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.
  • the sleeve 14 may not have a beveled edge and the contact surface S140 may be such that an annular surface having circular inner and outer contours.
  • 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 mating surfaces of sleeve 14 and member 16.

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Claims (11)

  1. Druckluft-Blasvorrichtung (1), umfassend:
    - einen Körper (2), der einen Kanal (20) für den Durchfluss von Druckluft, der einen sich gemäß einer ersten Achse (X20b) erstreckenden stromaufwärts gelegenen Kanal (20b) und einen stromabwärts gelegenen Kanal (20a) zum Ausstoßen von Luft einschließt, und eine Bohrung (22) aufweist, die sich gemäß einer zweiten Achse (Y22) erstreckt und in schräger oder senkrechter Weise in den stromaufwärts gelegenen Kanal (20b) mündet,
    - ein Verschlusselement (16), das translatorisch parallel zur zweiten Achse im Inneren der Bohrung zwischen einer geschlossenen Stellung, in der es den Durchgang von Luft in den Kanal blockiert, und einer Offenstellung, in der die Luft frei zwischen dem stromaufwärts gelegenen Kanal und dem stromabwärts gelegenen Kanal zirkulieren kann, beweglich ist,
    - einen Handgriff (4) zum Steuern der Verschiebung des Verschlusselements, der zwischen einer entspannten Konfiguration, in der er das Verschlusselement in der geschlossenen Stellung hält, und einer Blaskonfiguration, in der das Verschlusselement in der Offenstellung ist, handhabbar ist,
    - Mittel (8) zum Rückstellen des Handgriffs in seine entspannte Konfiguration,
    dadurch gekennzeichnet, dass sie außerdem eine rohrförmige Hülse (14) umfasst, die im Inneren des stromaufwärts gelegenen Kanals (20b) festgelegt ist, sich parallel zur ersten Achse (X20b) erstreckt und einen Luftdurchgang (P14) begrenzt, und dass das Verschlusselement (16) in der geschlossenen Stellung geeignet ist, eine Öffnung (014) des Luftdurchgangs (P14) zu verschließen, indem es mit der Hülse einen dichten Kontakt bildet.
  2. Blasvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Hülse (14) eine Kontaktfläche (S140) mit dem Verschlusselement (16) begrenzt, die in einer in Bezug auf eine Ebene (P2) senkrecht zur ersten Achse (X20b) schrägen Ebene (P1) angeordnet ist.
  3. Blasvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Kontaktfläche (S140) der Hülse (14) eine Ringfläche ist, die elliptische Innen- und Außenkonturen aufweist.
  4. Blasvorrichtung nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass die Hülse (14) und das Verschlusselement (16) jeweils einen angefasten Rand (140, 166) umfasst, und dass die Kontaktfläche (S140) der Hülse an ihrem angefasten Rand begrenzt ist.
  5. Blasvorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Kontaktfläche (S140) der Hülse eine Erhebung (142) aufweist, die mit dem Verschlusselement (16) eine Dichtungsfläche bildet, wenn dieses in der Verschlussstellung ist.
  6. Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie einen Ansatz (12) zum Anschließen an ein Rohr zur Versorgung mit Druckluft umfasst, wobei dieser Ansatz geeignet ist, an dem Körper (2) der Blasvorrichtung befestigt zu werden, und geeignet ist, in abgedichteter Weise mit einem zur Bohrung (22) entgegengesetzten Ende (148) der Hülse (14) zusammenzuarbeiten.
  7. Blasvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass sie Mittel (10, 8, 28) zur Festlegung des Ansatzes (12) in dem stromabwärts gelegenen Kanal (20b) umfasst, die einen Reiter (10) umfassen, der in einem Aufnahmeraum (28) des Körpers durch die Mittel (8) zum Rückstellen des Handgriffs festgelegt ist und der mit einer Umfangsnut (120) des Ansatzes (12) zusammenarbeitet, um die Verschiebung des Ansatzes im Inneren des stromaufwärts gelegenen Kanals (20b) zu blockieren.
  8. Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Verschlusselement (16) durch einen Drücker (40) des Handgriffs (4), der in Anlage gegen ein Ende (160) des Verschlusselements entgegengesetzt zu dem stromaufwärts gelegenen Kanal liegt, in der Verschlussstellung gehalten wird und dass der Drücker auf das Verschlusselement gemäß einer zweiten Achse (Y22) der Bohrung wirkt.
  9. Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Mittel (24, 146) zur drehfesten Festlegung der Hülse (14) im Inneren des stromaufwärts gelegenen Kanals (20b) umfasst, wobei die Mittel einen von der Hülse getragenen Längssteg (146) und eine in dem Körper der Blasvorrichtung eingearbeitete Nut (24) zur Aufnahme dieses Steges umfassen.
  10. Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Handgriff (4) Mittel (44) zur Mitnahme des Verschlusselements (16) translatorisch in seine Offenstellung umfasst, dass diese Mittel (44) mindestens einen Raum zur Aufnahme eines hervorspringenden Basisteils (160) des Verschlusselements umfassen und dass der hervorspringende Basisteil (160) an einem Ende entgegengesetzt zum stromaufwärts gelegenen Kanal (20b) angeordnet ist und in den oder die Aufnahmeräume (44) des Handgriffs (4) mit einem axialen Spiel (J), das parallel zur zweiten Achse (Y22) der Bohrung gemessen wird, zwischen dem Basisteil (160) des Verschlusselements und einem Kontaktrand (440) des oder der Aufnahmeräume (44) eingreift.
  11. Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Hülse (14) aus elastischem Material, insbesondere aus Kunststoff oder Kautschuk hergestellt ist.
EP15161599.4A 2014-03-31 2015-03-30 Luftdüse für druckluft Active EP2926912B1 (de)

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FR1452825A FR3019066B1 (fr) 2014-03-31 2014-03-31 Soufflette a air comprime

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USD812189S1 (en) * 2016-05-26 2018-03-06 Guardair Corp. Safety air gun
SE540737C2 (en) * 2017-03-02 2018-10-23 Silvent Ab Blow gun
USD865120S1 (en) * 2017-05-29 2019-10-29 Silvent Ab Compressed air gun
KR102141119B1 (ko) 2018-07-02 2020-08-05 (주)케맥스 에어건
US11406995B2 (en) * 2019-01-25 2022-08-09 Graco Minnesota Inc. Material spray gun
DE102019116307A1 (de) * 2019-05-08 2020-11-12 Ecoclean Gmbh Reinigungsvorrichtung und Verfahren zum Reinigen von Bauteilen
CN111520733A (zh) * 2020-05-28 2020-08-11 大唐长春第二热电有限责任公司 小型液压式水力除灰渣装置

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ES2645213T3 (es) 2017-12-04
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FR3019066A1 (fr) 2015-10-02
MX2015003884A (es) 2015-09-29
DK2926912T3 (en) 2017-10-23
EP2926912A1 (de) 2015-10-07
KR102357230B1 (ko) 2022-01-28
CA2886172C (fr) 2022-08-23
FR3019066B1 (fr) 2016-04-29
TW201600173A (zh) 2016-01-01
KR20150113904A (ko) 2015-10-08
US20150273485A1 (en) 2015-10-01
US9511380B2 (en) 2016-12-06
TWI649127B (zh) 2019-02-01
CN104941836A (zh) 2015-09-30

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