EP1492958B1 - Entrainement de contraction - Google Patents

Entrainement de contraction Download PDF

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Publication number
EP1492958B1
EP1492958B1 EP03708119A EP03708119A EP1492958B1 EP 1492958 B1 EP1492958 B1 EP 1492958B1 EP 03708119 A EP03708119 A EP 03708119A EP 03708119 A EP03708119 A EP 03708119A EP 1492958 B1 EP1492958 B1 EP 1492958B1
Authority
EP
European Patent Office
Prior art keywords
clamping
contraction
tube
drive according
contraction drive
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.)
Expired - Lifetime
Application number
EP03708119A
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German (de)
English (en)
Other versions
EP1492958A1 (fr
Inventor
Bernd Lorenz
Stefan Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP1492958A1 publication Critical patent/EP1492958A1/fr
Application granted granted Critical
Publication of EP1492958B1 publication Critical patent/EP1492958B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
    • F15B15/103—Characterised by the construction of the motor unit the motor being of diaphragm type using inflatable bodies that contract when fluid pressure is applied, e.g. pneumatic artificial muscles or McKibben-type actuators

Definitions

  • the invention relates to a fluid-operated contraction drive, comprising a contraction tube extending between two head pieces, which undergoes a length contraction when fluid is admitted to the hose inner space defined by it and exerts axial tensile forces acting on the head pieces in the sense of mutual approach, the contraction hose being attached to at least one head piece is fastened in that it is clamped with its respective end portion in an annular clamping gap, between at least partially inclined with respect to the longitudinal axis of the contraction tube clamping surfaces of a serving with external tap force tap means first clamping unit and a relative to the first clamping unit axially displaceable second clamping unit is defined.
  • a contraction tube extends between two head pieces, which are each equipped with two clamping units which are screwed together in the manner of a union nut. Between the clamping units, an annular clamping gap is defined, in which the contraction tube is clamped with its associated end region. If the tube interior of the contraction tube is filled with pressure medium under a certain operating pressure, the contraction tube widens radially and at the same time pulls the two head pieces towards one another. On In this way, external structures or components, which are fixed to the Kraftabgriffsmitteln the headers, are displaced relative to each other and / or clamped together.
  • Patent Abstracts of Japan Vol. 015, No. 006 (M-1066), Jan. 8, 1991 (1991-01-08) & JP 02 256 993 A discloses a hose fitting in which a hose used to transfer fluid is clamped between two clamping units. In order to avoid leakage even if the hose has an irregular wall thickness, the two clamping units are additionally resiliently biased against each other.
  • the solution to this problem is characterized by additionally provided for contraction hose, effective between the two clamping units clamping means, the clamping units in Apply a sense of reducing the width of the nip.
  • the two clamping units are automatically readjusted to the extent that the wall thickness of the clamped end section of the contraction tube is reduced, so that the desired clamping force can be maintained permanently and also under unfavorable environmental influences.
  • the clamping means in such a way that they only become effective or only for certain events, for example, when the ambient temperature exceeds a certain level.
  • Such a design could be realized by the use of so-called memory metal.
  • a solution is considered to be simpler and at least more cost-effective, in which the clamping means are designed so that they are constantly effective.
  • This can be realized, in particular, by the use of tensioning means having elastic properties, in particular in the form of a mechanical spring device of a corresponding construction.
  • Particularly compact dimensions promises a mechanical spring device which is composed of a plate spring package.
  • the clamping surfaces run within the nip so inclined to each other that increases their distance from the longitudinal axis of the contraction tube to the contraction tube axially opposite outer end portion of the respective head piece out.
  • the ring diameter of the annular clamping gap then increases toward the outer end region of the head piece preferably gradually.
  • the respective head piece is provided with holding means, which serve to clamp the two clamping units for obtaining a base clamping of the contraction tube independently of the Fluidbeetzstoffs Kunststoff the hose interior with each other.
  • the holding means can be realized for example by a threaded connection, which is provided between a clamping nut and the Kraftabgriffsteil the first clamping unit.
  • a particularly compact arrangement results when responsible for the active clamping of the contraction tube Clamping means are located in an area that is located within the contraction tube.
  • an advantageous safety aspect can also be realized. Since slipping out of the contraction tube from the head piece is prevented by the secure fixation and automatic readjustment of the clamp fastening, with increasing overstress the effect occurs that the tube material becomes slightly porous in the thinner clamping region becoming thinner. Through the fine holes can then escape air, so that overuse of the tubing or even a bursting of the same is prevented.
  • FIGURE shows a preferred embodiment of the actuator according to the invention, partially in longitudinal section.
  • the illustrated contraction drive includes two mutually spaced first and second headers 2, 3, wherein in the drawing, for the sake of simplicity, only one of the headers 2 is shown completely.
  • the two head pieces 2, 3 are firmly connected to each other via a linearly extending contraction tube 4.
  • the contraction tube 4 At least in the deactivated state of the contraction drive, the contraction tube 4 has a hollow-cylinder-like shape.
  • the longitudinal axis of the contraction drive which simultaneously represents the longitudinal axis of the contraction tube 4, is indicated at 9.
  • the contraction tube 4 expediently has an existing material with rubber-elastic properties elongated tubular body 5.
  • the material is preferably rubber or an elastomeric material used with comparable properties.
  • strand structure 1 is embedded, which is suitably completely enclosed by the hose body material and which has a coaxial to the hose body 5 arrangement.
  • the structural configuration of the contraction tube 4 can correspond in particular to that described in DE 29906626 U1 or in EP 0 161 750 B1.
  • the contraction tube 4 is fixed with its two axial end portions 10 on each associated head piece 2, 3, on the one hand, a fluid-tight connection between the hose body 5 and the respective head piece 2, 3 is present, and on the other hand, the strand structure 1 is capable of tensile forces to exercise the respective head piece 2, 3.
  • the strand structure 1 instead of the strand structure 1, other suitable measures for the transmission of axial tensile forces can be taken.
  • the tube interior 13 opens at least one fluid channel 14 which in the embodiment, the fully shown first header 2 preferably passes coaxially.
  • the fluid channel 14 is connectable to a fluid line, not shown, which leads to a pressure medium source.
  • the contraction drive is preferably operated with gaseous pressure medium, in particular compressed air.
  • gaseous pressure medium in particular compressed air.
  • a hydraulic fluid for example with oil or with water.
  • Each headpiece 2, 3 is equipped with force tapping means 17 at an externally accessible location. These are formed in the embodiment of a threaded portion of the respective head piece 2, 3 and allow attachment of the respective head piece 2, 3 to a non-illustrated component. For example, it would be possible to fix the first head piece 2 with its force gripping means 17 on the frame of a machine and to connect the other head piece 3 with a machine part to be moved relative to the machine frame.
  • the contraction drive is suitable for virtually all applications that require relocating or clamping two components relative to one another.
  • connection to the corresponding component can take place directly via the force tapping means 17 or with the interposition of an adapter part not shown in detail, which is fixed to the Kraftabgriffsstoffn 17.
  • a pressure medium under a predetermined operating pressure is fed into the tube interior 13 via the fluid channel 14. Due to this overpressure, the wall of the contraction tube 4 is acted upon radially outwardly from the inside, so that an admission takes place in the sense of a radial widening of the contraction tube 4.
  • This has the consequence that the contraction tube 4 is acted upon simultaneously in the sense of an axial contraction, wherein the axial tensile forces caused by the contraction tube 4 act on the head pieces 2, 3 in the sense of a mutual approach.
  • this is accompanied by a more or less strong mutual axial approach of the two head pieces 2, 3, wherein the here by the head pieces 2, 3 relative to each other traveled distance can be referred to as a hub.
  • the pressure medium is at least partially drained from the hose interior 13.
  • the contraction tube 4 then extends back into the starting position, so that the head pieces 2, 3 return to the starting position. If necessary, this return movement can be promoted by additional support measures, for example by return springs.
  • the particular movement and deformation behavior of the contraction tube 4 is ensured in the embodiment by the strand structure 1.
  • the construction associated therewith may correspond, for example, to that explained in German Utility Model DE 29906626 U1 or EP 0161750 B1.
  • the strand structure 1 preferably contains a plurality of bending flexible, but at the same time a high tensile strength, single or multifilament strands extending between the two head pieces 2, 3, a design in which the strands are helical in the direction of the circumference of the hose body 5 extend between the headers 2, 3 and are arranged in particular in a cross-over configuration, so that form diamond-like grid areas.
  • the power transmission to the head pieces 2, 3 is realized in that the contraction tube 4 is firmly clamped at its end portions 10 in each associated head piece 2, 3.
  • the head pieces 2, 3 are equipped with a particularly advantageous clamping device 18, which is expediently identical in both head pieces.
  • a particularly advantageous clamping device 18 which is expediently identical in both head pieces.
  • the clamping device 18 is a direct component of the relevant head piece 2, 3. It contains a first clamping unit 22 which is equipped with the Kraftabgriffsstoffn 17, and further has a respect to the first clamping unit 22 separately formed second clamping unit 23, which has no Kraftabgriffsstoff 17.
  • the two clamping units 22, 23 engage coaxially with each other, wherein a provided on the first clamping unit 22 first clamping surface 24 of a provided on the second clamping unit 23 second clamping surface 25 is radially opposite.
  • the two clamping surfaces 24, 25 are oriented transversely to the longitudinal axis 9 and facing each other.
  • the two clamping units 22, 23 define between the two clamping surfaces 24, 25 an annular clamping gap 26. This is open to the other head facing the inner end of the respective head piece out, the contraction tube 4 from the open side with its end portion 10 concentric engages in the nip 26.
  • the two clamping units 22, 23 are so tightly clamped together during assembly of the contraction drive that they act on the wall of the end portion lying between them 10 with a clamping force called base clamping clamping force.
  • the clamping surfaces 24, 25 are on the one hand on the inner surface and the other on the outer surface of the hose body 5, against which they are firmly biased.
  • the end portion 10 of the contraction tube 4 is enclosed by the first clamping unit 22 on the outside.
  • the second clamping unit 23 dives from the front side coaxially into the contraction tube 4.
  • the second clamping unit 23 is formed in the embodiment of a cone-like element whose lateral surface forming the second clamping surface 25 at least over a partial length and preferably at least approximately over the entire length has a conically tapering towards the contraction tube 4 course.
  • the second clamping surface 25 is expediently not formed smooth-surfaced, but has a wave-shaped cross-sectional contour. This results in an outer surface with an axial succession of alternating annular elevations and depressions.
  • the first clamping unit 22 is designed in several parts and has a force tapping means equipped with the force sensing means 28 and a threaded engagement with this, designed as a union nut clamping nut 29.
  • the Kraftabgriffsteil 28 engages with an axially extending central bearing extension 32 in a complementary contoured LagerungsausEnglishung 33 second clamping unit 23 into it, wherein the LagerungsausEnglishung 33 expediently is formed by a the second clamping unit 23 over its entire length passing through, stepped passage 34.
  • the Kraftabgriffsteil 28 has an axial through hole 35, which forms the fluid channel 14 together with the adjoining the bearing extension 32 longitudinal portion of the passage opening 34 and which is provided with the Kraftabgriffsmitteln 17 as an internal thread.
  • the two clamping units 22, 23 are designed to be movable relative to each other in the longitudinal direction of the contraction tube 4, wherein the possible direction of movement 36 is indicated by a double arrow.
  • the bearing recess 33 together with the bearing extension 32 engaging in it forms an axial displacement guide.
  • the clamping nut 29 has a sleeve-like structure with an inwardly oriented first clamping surface 24 defining clamping portion 42 and an axially adjoining mounting portion 43 which engages over the force tapping portion 28 in the region of a flange-shaped portion outside. Between the clamping nut 29 and the Kraftabgriffsteil 28 holding means 44 are provided which define a screw connection, which makes it possible to vary the axial relative position between the two components. Instead of the screw and other equivalent holding means could be selected.
  • the provided on the clamping nut 29 first clamping surface 24 has the same inclination as the second clamping surface facing her 25. It is preferably formed smoothly or with only a small roughness.
  • both clamping surfaces 24, 25 of the skew is chosen so that the distance to the longitudinal axis 9 with increasing Approaching the contraction tube 4 axially opposite outer end portion of the head piece 2 increases.
  • the diameter of the annular clamping gap 26 thus expands starting from the axially inner end of the head piece 2 axially outward.
  • the clamping device 18 contains, in addition to the previously described components between the two clamping units 22, 23 effective clamping means 45, which are able to act on the two clamping units 22, 23 in the sense of reducing the width B of the clamping gap 26.
  • the clamping means 45 have in the embodiment of spring elastic properties and are formed by a mechanical spring means which is arranged coaxially between the second clamping unit 23 and the Kraftabgriffsteil 28 of the first clamping unit 22.
  • the tensioning means 45 is a disk spring package.
  • the clamping means 45 are in the embodiment in an area which is located within the contraction tube 4. They are seated in an admission space 46, which is in front of the bearing extension 32 to the second clamping unit 23, wherein it is defined by an extended portion of the passage opening 34.
  • the loading space 26 is delimited by two axially opposing loading surfaces 47, 48, wherein the first loading surface 47 is provided on the end face of the bearing extension 32 and the second loading surface 48 opposite to the second clamping unit 23. Radially outward, the loading space 46 is bounded directly by the second clamping unit 23, which overlaps the bearing extension 32 like a hatch.
  • the clamping means 45 simultaneously act on the two loading surfaces 47, 48 and thus push the second clamping unit 23 away from the force tapping part 28, in the sense of an approximation of the second clamping surface 25 to the first clamping surface 24.
  • the admission chamber 46 is also in constant communication with the tube interior 13 via the passage opening 34.
  • the second clamping unit 23 is first pushed onto the bearing extension 32 of the force tapping part 28 after the tensioning means 45 have been inserted in advance.
  • the clamping nut 29 is not yet installed here.
  • the end portion 10 of the contraction tube 4 is attached to the abutment against a second stop 52 on the second clamping unit 23.
  • the contraction tube is widened trumpet-like.
  • the previously plugged onto the contraction tube 4 clamping nut 29 is pushed over the unit of Kraftabgriffsteil 28 and second clamping unit 23, so that the second clamping unit 23 coaxially within the clamping nut 29 comes to rest.
  • the clamping nut 29 is now screwed onto the Kraftabgriffsteil 28, wherein the first clamping surface 24 presses from the outside against the contraction tube 4, which is supported on the inside of the second clamping surface 25.
  • the supporting force of the second clamping surface 25 results from the clamping means 45, which are supported between the two clamping units 22, 23.
  • the clamping nut 29 is now tightened until the desired base clamping of the contraction tube 4 is reached.
  • the second clamping unit 23 coaxially pushed onto the bearing extension 32, at the same time the intermediate clamping means 45 are compressed, so that builds up a restoring force, which is constantly effective and provides the counterforce for clamping the contraction tube 4.
  • the contraction tube 4 is now firmly anchored in the nip 26, wherein the tubing according to the shape of the clamping surfaces 24, 25 has deformed.
  • the tensioning means 45 prevent the clamping force from lowering below the preselected base restraint. Any reductions in the wall thickness of the contraction tube 4 within the nip 26 are compensated immediately and automatically by the second clamping surface 25 is tracked by the force of the clamping means 45. The clamping gap is then a little narrower, but the clamping forces are retained. Even under unfavorable circumstances slipping out of the contraction tube 4 from the head piece 2, 3 is avoided in this way.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Supports For Pipes And Cables (AREA)
  • Clamps And Clips (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Pipe Accessories (AREA)
  • Actuator (AREA)

Claims (16)

  1. Mécanisme de contraction actionné par un fluide, comportant un tuyau de contraction (4), qui s'étend entre deux abouts (2, 3) et qui, lorsque son volume intérieur (13) est sollicité par un fluide, subit une contraction en longueur et exerce des forces de traction axiales agissant dans le sens d'un rapprochement réciproque sur les abouts (2,3), le tuyau de contraction (4) étant fixé à au moins un about (2, 3) par le fait que, par son extrémité (10) concernée, il est serré dans une fente de serrage (26) annulaire, qui est définie par des surfaces de serrage (24, 25), au moins partiellement inclinées par rapport à l'axe longitudinal (9) du tuyau de contraction (4), d'une première unité de blocage (22), munie de moyens de prise de force destinés à une prise de force extérieure, et d'une deuxième unité de blocage (23), apte à être déplacée axialement par rapport à la première unité de blocage (22), caractérisé par des moyens de serrage (45), qui sont prévus en plus du tuyau de contraction (4) pour agir entre les deux unités de blocage (22, 23), et qui sollicitent les unités de blocage (22, 23) dans le sens d'une diminution de la largeur de la fente de serrage (26).
  2. Mécanisme de contraction selon la revendication 1, caractérisé en ce que les moyens de serrage (45) sont réalisés de telle sorte qu'ils sont actifs en permanence.
  3. Mécanisme de contraction selon la revendication 1 ou 2, caractérisé en ce que les moyens de serrage (45) possèdent des propriétés d'élasticité.
  4. Mécanisme de contraction selon l'une des revendications 1 à 3, caractérisé en ce que les moyens de serrage (45) comportent un dispositif à ressort mécanique, tel qu'un bloc de ressorts Belleville.
  5. Mécanisme de contraction selon l'une des revendications 1 à 4, caractérisé en ce que, entre des surfaces de sollicitation (47, 48), axialement face à face, des deux unités de blocage (22, 23), est défini un espace de sollicitation (46) qui contient les moyens de serrage (45).
  6. Mécanisme de contraction selon la revendication 5, caractérisé en ce que l'espace de sollicitation (46) est en liaison fluidique avec le volume intérieur (13) du tuyau.
  7. Mécanisme de contraction selon l'une des revendications 1 à 6, caractérisé en ce que les surfaces de serrage (24, 25) à l'intérieur de la fente de serrage (26) sont inclinées de telle sorte que leur écartement s'agrandit depuis l'axe longitudinal du mécanisme de contraction vers la zone d'extrémité extérieure de l'about (2, 3), axialement opposée au tuyau de contraction (4).
  8. Mécanisme de contraction selon l'une des revendications 1 à 7, caractérisé en ce qu'une ou les deux surfaces de serrage (24, 25) suivent un tracé conique au moins partiellement et avantageusement sur à peu près toute leur longueur.
  9. Mécanisme de contraction selon l'une des revendications 1 à 8, caractérisé en ce qu'au moins une des surfaces de serrage (24, 25), de préférence celle de l'unité de blocage s'engageant dans le tuyau de contraction (4), présente un contour de section ondulé.
  10. Mécanisme de contraction selon l'une des revendications 1 à 9, caractérisé en ce que la première unité de blocage (22), munie des moyens de prise de force (17), enserre de l'extérieur le tuyau de contraction (4).
  11. Mécanisme de contraction selon l'une des revendications 1 à 10, caractérisé en ce qu'il est prévu des moyens de retenue (44) qui sont destinés à bloquer l'une contre l'autre les deux unités de blocage (22, 23) pour obtenir un serrage de base du tuyau de contraction (4) indépendamment de l'état de sollicitation du volume intérieur (13) du tuyau par le fluide.
  12. Mécanisme de contraction selon l'une des revendications 1 à 11, caractérisé en ce que la première unité de blocage (22) comporte un élément de prise de force (28), muni des moyens de prise de force (17), et un écrou de serrage (29), apte à être vissé sur l'élément de prise de force (28) et comportant une des surfaces de serrage (24), tandis que la deuxième unité de blocage (23), comportant l'autre surface de serrage (25), est disposée coaxialement à l'intérieur de l'écrou de serrage (29) et est posée de manière mobile dans le sens axial sur l'élément de prise de force (28).
  13. Mécanisme de contraction selon la revendication 12, caractérisé en ce que la deuxième unité de blocage (23) s'engage de l'extérieur de manière mobile dans le sens axial au-dessus d'un prolongement formant palier (32) de l'élément de prise de force (28).
  14. Mécanisme de contraction selon la revendication 12 ou 13, caractérisé en ce que les moyens de serrage (45) sont disposés entre la deuxième unité de blocage (23) et l'élément de prise de force (28).
  15. Mécanisme de contraction selon l'une des revendications 1 à 14, caractérisé en ce que les moyens de serrage (45) sont disposés dans une zone qui est située à l'intérieur du tuyau de contraction (4).
  16. Mécanisme de contraction selon l'une des revendications 1 à 15, caractérisé en ce que le tuyau de contraction (4) comporte un corps de tube (5), réalisé dans un matériau avec des propriétés d'élasticité, et une structure à brins (1) disposée coaxialement au corps de tube (5), ladite structure à brins (1) étant avantageusement enrobée dans le matériau du corps de tube (5).
EP03708119A 2002-04-11 2003-02-21 Entrainement de contraction Expired - Lifetime EP1492958B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20205719U DE20205719U1 (de) 2002-04-11 2002-04-11 Fluidbetätigter Kontraktionsantrieb
DE20205719U 2002-04-11
PCT/EP2003/001781 WO2003085271A1 (fr) 2002-04-11 2003-02-21 Entrainement de contraction

Publications (2)

Publication Number Publication Date
EP1492958A1 EP1492958A1 (fr) 2005-01-05
EP1492958B1 true EP1492958B1 (fr) 2006-09-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03708119A Expired - Lifetime EP1492958B1 (fr) 2002-04-11 2003-02-21 Entrainement de contraction

Country Status (7)

Country Link
US (1) US7222887B2 (fr)
EP (1) EP1492958B1 (fr)
AT (1) ATE339618T1 (fr)
DE (2) DE20205719U1 (fr)
ES (1) ES2268333T3 (fr)
MX (1) MXPA04009945A (fr)
WO (1) WO2003085271A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE10324321A1 (de) * 2003-05-27 2004-12-23 Putzmeister Ag Transportrohr für Dickstoffe
IL177035A (en) * 2006-07-23 2010-11-30 Sagiv Agudah Shitufit Chaklait Be Am Pipe fitting assembly and a method for forming it
US20080143107A1 (en) * 2006-12-13 2008-06-19 Bowling Bruce A Fluid interconnect assembly
US7806187B2 (en) * 2008-05-19 2010-10-05 Trendsetter Engineering, Inc. Connector assembly for connecting a hot stab to a hydraulic hose
GB201507720D0 (en) 2015-05-06 2015-06-17 Ge Oil And Gas Uk Ltd Access provision
GB201507718D0 (en) * 2015-05-06 2015-06-17 Ge Oil And Gas Uk Ltd Termination of a flexible pipe
JP6889992B2 (ja) * 2016-09-02 2021-06-18 株式会社ブリヂストン 流体圧アクチュエータ
JP7109893B2 (ja) * 2017-09-11 2022-08-01 株式会社コガネイ アクチュエータ
GB2586118A (en) 2019-06-14 2021-02-10 Actuation Lab Ltd Contractile device for use as an actuator, pump or compressor
CN112682603B (zh) * 2020-12-21 2022-04-01 安徽蓝通科技股份有限公司 一种可伸缩适应pvc管大小的管头

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Publication number Priority date Publication date Assignee Title
US2470538A (en) * 1944-02-18 1949-05-17 Parker Appliance Co Four-piece hose coupling
FR1092792A (fr) * 1954-02-05 1955-04-27 Raccord automatique
JPH02256993A (ja) * 1988-12-16 1990-10-17 Fuji Electric Co Ltd ホース接続装置
JPH0366995A (ja) * 1989-08-03 1991-03-22 Matsumura Kikai Seisakusho:Kk チューブ接続用継手
GB2248664A (en) * 1990-10-12 1992-04-15 Draftex Ind Ltd Quick-assembly hose clamping device
US5735553A (en) * 1996-03-08 1998-04-07 Niemiec; Albin J. Flared tube fitting for connecting flow conductors
DE29906626U1 (de) * 1999-04-14 1999-07-15 Festo AG & Co, 73734 Esslingen Betätigungseinrichtung
DE10027731C1 (de) * 2000-06-03 2001-11-29 Festo Ag & Co Durch Fluidbeaufschlagung aktivierbare Betätigungseinrichtung
DE10034389C2 (de) 2000-07-14 2002-06-13 Festo Ag & Co Durch Fluidbeaufschlagung aktivierbare Betätigungseinrichtung

Also Published As

Publication number Publication date
WO2003085271A1 (fr) 2003-10-16
MXPA04009945A (es) 2005-06-20
US7222887B2 (en) 2007-05-29
DE50305035D1 (de) 2006-10-26
EP1492958A1 (fr) 2005-01-05
ATE339618T1 (de) 2006-10-15
ES2268333T3 (es) 2007-03-16
DE20205719U1 (de) 2002-07-11
US20050093293A1 (en) 2005-05-05

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