EP0558924B1 - Entraînement linéaire - Google Patents

Entraînement linéaire Download PDF

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Publication number
EP0558924B1
EP0558924B1 EP93101377A EP93101377A EP0558924B1 EP 0558924 B1 EP0558924 B1 EP 0558924B1 EP 93101377 A EP93101377 A EP 93101377A EP 93101377 A EP93101377 A EP 93101377A EP 0558924 B1 EP0558924 B1 EP 0558924B1
Authority
EP
European Patent Office
Prior art keywords
guide
linear drive
housing
drive according
movement
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.)
Revoked
Application number
EP93101377A
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German (de)
English (en)
Other versions
EP0558924A1 (fr
Inventor
Kurt Dipl.-Ing. Stoll
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6453174&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0558924(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP0558924A1 publication Critical patent/EP0558924A1/fr
Application granted granted Critical
Publication of EP0558924B1 publication Critical patent/EP0558924B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type

Definitions

  • the invention relates to a linear drive, with a housing which has a longitudinal slot, with a drive part which is arranged to be longitudinally movable in the housing, with a longitudinal guide which is arranged outside the housing and extends parallel to the direction of movement of the drive part and on which a guide part suitable for power take-off along a guide path is arranged movably guided in the longitudinal direction, and with a driver which connects the drive part to the guide part to form a jointly longitudinally movable movement unit and extends through the longitudinal slot, the longitudinal guide being designed as a rod guide which has at least one arranged radially to the housing next to the latter , along its guide path has exposed guide rod all around, which is encompassed by the guide part.
  • Linear drives of this type which are also referred to as slot cylinders, are known from US-A-2 473 43o.
  • At the drive part is formed by a piston which is displaced by the action of a pressure medium.
  • the slide-like guide part is moved synchronously because of the coupling that takes place via the driver when the drive part is moved. It serves as a power take-off and enables the attachment of loads to be moved.
  • the longitudinal guide is formed by a rod guide, which can be produced independently of the housing, so that the housing structure is simplified.
  • a guide rod can also be processed very precisely with relatively simple means, so that a high level of guidance accuracy is achieved.
  • US-A-4 813 341 discloses a linear drive in which the guide part sits on the outside of the housing containing the drive part. It spans the slotted housing area and is supported on guideways formed on both sides of the longitudinal slot directly on the outer circumference of the housing. The clasping thus achieved counteracts a widening of the housing under high internal pressure. On the other hand, however, high transverse forces occur in the area of the guide contact, which can cause jamming and impair functionality, but at least increase wear on the guide components.
  • rod guide includes a single guide rod. This eliminates the need for an additional relative adjustment, as may be necessary when using several guide rods. It can also be used to implement particularly compact linear drives.
  • a guide rod with a non-circular cross-section is recommended, which, if the guide part is appropriately adapted, results in an automatic rotation lock for the latter.
  • Pendulum movements of the guide part about its longitudinal axis are thereby excluded, which also prevents the drive part attached via the driver from sideways movements, which protects the sealing elements arranged on the latter.
  • a polygonal profile rod, which is in particular a square profile rod, is preferably used as the guide rod.
  • the guide part In order to be equipped for all load cases, it is proposed to equip the guide part with a guide device that positively encompasses the guide rod over its entire circumference.
  • the guide part can be optimally supported on the guide rod against lateral forces of practically any type and direction.
  • the use of two holders is recommended, which are fixed to the housing at a distance from each other in the direction of movement of the movement unit and which carry the guide rod, the guide section which can be covered by the guide part being located between the two holders.
  • At least one holder is expediently provided with a stroke limiting stop which projects into the path of the guide part and which can be formed directly by a part of the holder.
  • the length of the guide path can preferably be variably adjusted by means of the holder in order to be able to meet the respective requirements in practice.
  • the linear drive according to the example has a housing 1 with a linear extension, which is contoured essentially in a parallelepiped shape. It has detachably attached housing covers 2 in the area of the two axial end faces. An axially extending housing space 3 is formed in the interior of the housing 1, which is preferably circularly contoured. In it, a drive part 4 is received, which is axially displaceable back and forth according to double arrow 5.
  • the linear drive according to the example is actuated fluidically and above all pneumatically.
  • the housing 1 is therefore a cylinder housing, and the drive part 4 is formed by a piston.
  • Ring-shaped sealing elements 6 carried by the drive part 4, which cooperate sealingly with the wall of the housing space 3, effect a fluid-tight division of the housing space 3 into two working spaces 7, 7 ′ arranged on opposite sides of the drive part 4.
  • Two pressure medium connections 8, 8 ' which are preferably formed on one of the housing covers 2, enable pressure medium supply and / or discharge with respect to the working spaces 7, 7'.
  • Internal pressure medium channels 12, 12 ' establish the connection between the pressure medium connections 8.8' and the working spaces 7.7 '.
  • the housing 1 has a longitudinal slot 13. It extends along the housing space 3.
  • a driver 14 fastened to the drive part 4 protrudes laterally out of the housing 1 through the longitudinal slot 13.
  • a sled-like guide part 15 is coupled to it outside the housing 1 and is arranged on a longitudinal guide 16 which extends parallel to the direction of movement 5 of the drive part 4 and is guided such that it can move along.
  • the arranged outside the housing 1 Longitudinal guide 16 is fixedly connected to the housing 1 and practically represents a uniform component of the linear drive.
  • the guide member 15 is used for power take-off. It is equipped with fasteners 17, here: fastening grooves which enable the releasable attachment of objects or loads to be transported.
  • the guide part 15, together with the driver 14 and the drive part 4, represents a movement unit 18 which can be displaced uniformly linearly according to the double arrow 5. By acting on the drive part 4 arranged in the housing 1, the guide part 15 arranged outside the housing 1 can thus be displaced linearly.
  • the housing 1 is sealed in a manner known per se and described, for example, in DE 31 24 915 C2, EP 0 157 892 B1 or EP 0 113 790 B1. A detailed description is therefore unnecessary at this point; reference is made to the corresponding statements in these publications.
  • the longitudinal slot 13 is covered from the housing space 3 by a sealing tape 19 clamped in the area of the housing cover 2.
  • a sealing tape 19 clamped in the area of the housing cover 2.
  • it is raised from the longitudinal slot 13 and runs through an opening 22 in the drive part 4. Of the lifted sealing tape area moves together with the drive part 4 during its movement.
  • the working spaces 7, 7 ' are sealed off from the environment at all times, since the sealing tape 19 seals the longitudinal slot 13 in their area.
  • the longitudinal slot 13 can also be covered by a masking tape 23, which prevents the ingress of contaminants. It traverses the driver 14 through an opening 24 that is comparable to the opening 22, and is therefore also lifted from the longitudinal slot 13 in the region of the movement unit 18.
  • the longitudinal guide 16 is formed by a rod guide 25 which, in the exemplary embodiment of FIGS. 1 to 3, contains a single guide rod 26. This runs laterally next to the housing 1 at a radial distance and extends parallel to the direction of movement 5. Its longitudinal axis 27 thus runs parallel to the longitudinal axis 28 of the housing 1.
  • the guide rod 26 is detachably fixed to the housing 1 by means of two holders 32, 32 ′ spaced from one another in the longitudinal direction 27.
  • the section of the guide rod located between the holders 32, 32 ' 26 forms the guide section 34, which the guide part 15 can sweep over as part of its movement.
  • the specification of the stroke of the movement unit 18 is thus advantageously effected by acting on the guide part 15, so that corresponding precautions are not necessary on the drive part 4.
  • the guide rod 26 expediently has a non-circular cross-section, at least in the region of the guide section 34, and the guide part 15 is in positive contact with the guide rod 26 in the circumferential direction with respect to the longitudinal axis 27 fixed non-rotatably.
  • the guide rod 26 of the exemplary embodiment has a uniform non-circular cross section over its entire length. It has proven to be optimal in this regard to equip the guide rod 26 in the region of the guide section 34 with a square cross-section, so that it is present as a square profile rod in the exemplary embodiment. Because of the simpler manufacture and the resulting uniform A square rod cross-section is recommended for force distribution. In all cases, a guide rod 26 made of solid material is recommended.
  • the guide rod 26 is encompassed by the guide part 15, it being advantageous if, as shown, a complete encompassment takes place. The latter is possible because the guide rod 26 is exposed in the area of the guide section 34 over its entire circumference and is unsupported.
  • the guide part 15 is designed as a block-like or cuboid body which has an axially continuous rod receptacle 35 through which the guide rod 26 is inserted.
  • the guide rod 26 is encompassed by a guide device 36 fixed on the guide part 15 over the entire circumference with a constant positive locking contact which prevents twisting but enables axial displacement.
  • the guide device 36 contains two guide bushes 37 designed as sliding bushes, which are fixed axially immovable in the rod receptacle 35, for example by being pressed in, for example.
  • the guide bushes 37 have a sleeve shape, the inner contour being complementary to the outer contour of the guide rod 26.
  • roller bearings can also be used, whereby one Expediently used so-called roller bearing bushes.
  • the reduced friction is usually offset by higher costs.
  • annular wipers 38 are inserted into the rod receptacle 35 and positioned at the axial end region of the guide part 15, with one of the two guide bushes 37 following axially inward on each wiper 38.
  • the wipers 38 are preferably made of plastic material, their inner contour advantageously being preformed in accordance with the outer contour of the guide rod 26.
  • the travel path of the movement unit 18 is predetermined by the two stroke limit stops 33.
  • the guide part 15 moves with one of its end faces 42 onto the stroke limiting stop 33 opposite in the direction of travel.
  • this is formed by the end face of a respective holder 32, 32 ′ facing the guide part 15.
  • the stroke of the movement unit 18 can be variably adjusted by steplessly specifying guide lengths 34 of different lengths, for which purpose the two holders 32 are arranged on the housing 1 in an adjustable manner in the longitudinal direction 28.
  • the axial positions of the holders 32, 32 ' can be variably adjusted relative to the guide rod 26.
  • the corresponding holder 32 ′ is released both with respect to the housing 1 and with respect to the guide rod 26 and then relative to the desired position in the axial direction according to double arrow 43 (FIG. 2) moved to the housing 1 and to the guide rod 26. 2, the selected position is indicated by a dot-dash line at 44.
  • the position of the guide rod 26 relative to the housing 1 does not change here.
  • a corresponding setting is also possible on the part of the other holder 32. In this way, both the length of the guide section 34 and its axial arrangement with respect to the housing 1 can be specified.
  • the adjustable fastening of the holders 32, 32 'to the housing 1 is realized in the exemplary embodiment by means of a further longitudinal guide 45.
  • the housing 1 carries two axially extending guide rails which run parallel to one another and are preferably integrally formed 46, 46 '.
  • the guide rails 46, 46 ' are located on both sides of the longitudinal slot 13 in the region of the two housing longitudinal edges arranged next to the latter.
  • Each guide projection 47, 47 ' is equipped with a clamping device 48 in order to releasably clamp it to the respectively associated guide rail 46, 46'.
  • a respective holder 32, 32 ′ can be adjusted axially along the housing 1 and fixed again at the desired position 44 by means of the clamping device 48.
  • the guiding quality of the rod guide 25 is not affected by this, since the clamping takes place exclusively via components that are stationary during operation.
  • the housing 1 also has In the area of the two further housing edges, a guide rail 49 in each case.
  • the holders 32, 32 ′ can thus be arranged on each of the four peripheral sides of the housing 1. It is then only necessary to ensure that the frictional connection between the drive part 4 and the guide part 15 is present by a suitable design of the driver 14.
  • the exemplary embodiment has the advantage of an extremely compact design transverse to the longitudinal axis 28 of the housing.
  • the guide rod 26 is located radially opposite the longitudinal slot 13. It is therefore arranged in an axial-radial plane 50 containing the longitudinal axis 28 of the drive part 4 and the longitudinal slot 13.
  • the holders 32, 32 ' can be positioned at any point along the longitudinal slot 13.
  • the rod guide 25 remains unaffected by any stress on the housing 1, so that the highest precision is guaranteed. It would also be conceivable to fix a respective holder axially outside of the longitudinally slotted housing section, for example on the front housing covers 2. This measure is particularly recommended if an axial holder adjustment is not necessary.
  • the guide rod 26 is preferably also attached to the respective holder 32, 32 'by means of clamping devices 51.
  • each holder 32, 32' has an axially continuous clamping opening 52 into which the guide rod 26 is inserted.
  • the holder 32, 32 ' is divided longitudinally, so that a removable holder element 53 is present.
  • the clamping opening 52 is opened on the circumference.
  • the holder element 53 thus belongs to the clamping device 51, in particular a plurality of clamping screws 55 are provided for applying the clamping force, with which the holder element 53 can be braced with the holder base 54.
  • the correspondingly contoured clamping opening 52 according to FIG. 1 can be arranged such that the parting plane 58 dividing the holder element 53 from the holder base 54 runs parallel to two opposite side surfaces of the clamping opening 52.
  • An optimization of the clamping occurs, however, if the parting plane 58 between two diametrically opposite one another Corner areas of the clamping opening 52 runs, so that a kind of prism clamping results. This is the case in the exemplary embodiment according to FIGS. 2 and 3.
  • the advantage here is an automatic, backlash-free centering when tightening the clamping screws 55.
  • the holders 32, 32 ' are also suitable for holding shock absorbers 56 and / or proximity switches 57. If the guide part 15 approaches one of its two end positions, the end impact can be reduced and / or a signal that can be further processed can be reduced with such means.
  • the guide part 15 in the exemplary embodiment is supported only on the guide rod 26 and is not directly supported by the housing 1, overdeterminations are excluded.
  • the guide member 15 and its movements are unaffected by any minimal deformation of the housing 1.
  • the rod guide 25 can be easily attached to the housing 1 and adjusted.
  • the movement unit 18 can therefore be formed by a rigid unit.
  • only the drive part 4 and the driver 14 are rigidly connected to one another, while the guide part 15 is only coupled to the driver 14 via a suspension connection 62.
  • This can transmit axial forces without play, but there are relative radial movements just as possible as rotary movements about the coupling axis 63 extending transversely to the axial-radial plane 50.
  • the hook-in connection 62 is realized in the exemplary embodiment in that the driver 14 carries a cross pin 64 which extends from the facing underside 65 of the guide part 15 into one engages this trained radial slot 66 open to the driver 14.
  • the guide part 15 need only be attached to the driver 14 radially with respect to the longitudinal axis 28 in order to produce the hook-in connection.
  • the rod guide 25 has two parallel guide rods 26 which are arranged at a distance from one another. Both are fixed to holders 32, 32 'in accordance with the single guide rod 26 of the other exemplary embodiments.
  • non-circular rod contours can be dispensed with in order to obtain an anti-twist device, so that round rods with a circular cross section are provided, for example.
  • a linear drive with only one guide rod 26 has considerable advantages since, apart from the lower material expenditure, a relative adjustment between several guide rods 26 is not necessary.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transmission Devices (AREA)

Claims (15)

  1. Entraînement linéaire, avec un boîtier (1), qui présente une fente longitudinale (13), avec une partie d'entraînement (4) montée mobile longitudinalement dans le boîtier (1), avec un guidage longitudinal (16) situé à l'extérieur du boîtier (1), s'étendant parallèlement à la direction de déplacement (5) de la partie d'entraînement (4), sur lequel une partie de guidage (15), convenant à la prise de force, est montée mobile dans la direction longitudinale le long d'un parcours de guidage (34), et avec un entraîneur (14) s'étendant à travers la fente longitudinale (13), reliant la partie d'entraînement (4) à la partie de guidage (15) pour former une unité de déplacement (18) mobile longitudinalement dans son ensemble, dans lequel le guidage longitudinal (16) est conformé en guidage à tige (25), qui comporte au moins une tige de guidage (26) située à distance radiale du boîtier (1), sur le côté de celui-ci, se trouvant dégagée tout autour d'elle le long de son parcours de guidage (34), laquelle tige de guidage (26) est entourée par la partie de guidage (15), caractérisé en ce que le guidage à tige (25) est situé au-dessus de la fente longitudinale (13).
  2. Entraînement linéaire selon la revendication 1, caractérisé en ce que le guidage à tige (25) comprend une seule tige de guidage (26).
  3. Entraînement linéaire selon la revendication 1 ou 2, caractérisé en ce que la tige de guidage (26) présente une section transversale non circulaire, au moins dans la zone du parcours de guidage (34).
  4. Entraînement linéaire selon la revendication 3, caractérisé en ce que la section transversale non circulaire est une section transversale polygonale en particulier régulière et de préférence rectangulaire.
  5. Entraînement linéaire selon la revendication 4, caractérisé en ce que la tige de guidage (26) est formée par une tige profilée polygonale.
  6. Entraînement linéaire selon la revendication 5, caractérisé en ce que la tige de guidage (26) est formée par une tige profilée quadrangulaire, de section transversale carrée.
  7. Entraînement linéaire selon l'une des revendications 3 à 6, caractérisé en ce que la partie de guidage (15) est liée par contact par concordance de forme avec la tige de guidage (26), de manière à ne pouvoir tourner dans la direction périphérique par rapport à celle-ci.
  8. Entraînement linéaire selon l'une des revendications 1 à 7, caractérisé en ce que la partie de guidage (15) présente un dispositif de guidage (36) entourant par concordance de forme la tige de guidage (26), en particulier sur tout son pourtour.
  9. Entraînement linéaire selon la revendication 8, caractérisé en ce que le dispositif de guidage (36) comprend au moins une douille de guidage (37), conformée en douille de palier glissant ou de palier de roulement, qui entoure totalement, coaxialement, la tige de guidage (26).
  10. Entraînement linéaire selon l'une des revendications 1 à 9, caractérisé en ce que la tige de guidage (26) est fixée sur le boîtier (1), par deux supports (32, 32') espacés l'un de l'autre dans la direction de déplacement (5) de l'unité de déplacement (18), supports entre lesquels se trouve le parcours de guidage (34).
  11. Entraînement linéaire selon la revendication 10, caractérisé en ce que sur au moins un support (32, 32') est prévue une butée de limitation de course (33), s'engageant dans le parcours de la partie de guidage (15).
  12. Entraînement linéaire selon la revendication 11, caractérisé en ce que pour imposer de manière variable des parcours de guidage (34) de longueur différente, il est prévu au moins un support (32, 32') réglable dans la direction de déplacement (5) de l'unité de déplacement (18) sur le boîtier (1) et en ce qu'en outre la tige de guidage (26) est réglable sur au moins l'un des supports (32, 32'), dans la direction de déplacement (5) de l'unité de déplacement (18).
  13. Entraînement linéaire selon l'une des revendications 10 à 12, caractérisé en ce qu'un support (32, 32') au moins est placé à l'extérieur axialement de la portion de boîtier fendue longitudinalement, en particulier sur un couvercle de boîtier frontal (2).
  14. Entraînement linéaire selon l'une des revendications 1 à 13, caractérisé en ce qu'une tige de guidage (26) est placée dans un plan radial-axial (50) contenant l'axe longitudinal (26) de la partie d'entraînement (4) et la fente longitudinale (13), la partie de guidage (15) faisant face radialement à la fente longitudinale (13).
  15. Entraînement linéaire selon la revendication 14, caractérisé en ce que la partie de guidage (15) est montée amovible sur l'entraîneur (14) et est accrochée dans ce cas dans l'entraîneur (14) de manière que dans la direction axiale (28) du plan axial-radial (50), des forces d'entraînement sont transmissibles, mais que dans la direction radiale de ce plan, un déplacement de compensation relatif est possible.
EP93101377A 1992-03-04 1993-01-29 Entraînement linéaire Revoked EP0558924B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4206751A DE4206751A1 (de) 1992-03-04 1992-03-04 Linearantrieb
DE4206751 1992-03-04

Publications (2)

Publication Number Publication Date
EP0558924A1 EP0558924A1 (fr) 1993-09-08
EP0558924B1 true EP0558924B1 (fr) 1996-11-06

Family

ID=6453174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93101377A Revoked EP0558924B1 (fr) 1992-03-04 1993-01-29 Entraînement linéaire

Country Status (3)

Country Link
US (1) US5330272A (fr)
EP (1) EP0558924B1 (fr)
DE (2) DE4206751A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4402702A1 (de) * 1994-01-29 1995-08-03 Maschimpex Handels Und Consult Linearführung
JP3655367B2 (ja) * 1994-09-30 2005-06-02 Ｓｍｃ株式会社 リニアアクチュエータ
US5568982A (en) * 1994-10-14 1996-10-29 Festo Kg Linear drive
DE9416523U1 (de) * 1994-10-14 1994-12-01 Festo Kg, 73734 Esslingen Linearantrieb
AU2679597A (en) * 1996-04-22 1997-11-12 Tol-O-Matic Inc. Slot bearing
DE19649718C1 (de) * 1996-11-30 1998-04-23 Festo Ag & Co Linearantrieb
DE29706493U1 (de) * 1997-04-11 1997-07-03 Festo Kg, 73734 Esslingen Kolbenstangenloser Linearantrieb
JP3177949B2 (ja) * 1997-04-29 2001-06-18 豊和工業株式会社 ロッドレスシリンダ
JP3818752B2 (ja) * 1997-09-24 2006-09-06 Ｓｍｃ株式会社 ロッドレスシリンダ
US6857780B2 (en) * 2002-11-15 2005-02-22 Phd, Inc. Rodless slide assembly
JP4587103B2 (ja) * 2005-04-19 2010-11-24 Ｓｍｃ株式会社 シリンダ装置のガイド機構
CN101922481B (zh) * 2009-06-09 2012-11-28 天津市天二锻压机床有限公司 精密力通杆油缸

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE113790C (fr) *
US2473430A (en) * 1945-05-19 1949-06-14 Le Roi Company Piston coupling mechanism
DE3124915C2 (de) * 1981-06-25 1984-10-31 Kaiser, Siegmund H., Ing.(grad.), 7440 Nürtingen Druckmittelzylinder mit einem längsgeschlitzten endseitig verschlossenen Zylinderrohr
EP0157892B1 (fr) * 1984-04-10 1987-06-24 Reinhard Lipinski Transporteur linéaire
US4852465A (en) * 1985-12-18 1989-08-01 Tol-O-Matic, Inc. Carrier bracket for power cylinder
JPH0765602B2 (ja) * 1987-01-30 1995-07-19 豊和工業株式会社 ロツドレスシリンダ
US4813341A (en) * 1987-02-27 1989-03-21 Tol-O-Matic, Inc. Pneumatic cylinder and means for powering a second pneumatic unit
US4785716A (en) * 1987-02-27 1988-11-22 Tol-O-Matic, Inc. Pneumatic cylinder and brake mechanism therefor

Also Published As

Publication number Publication date
DE4206751A1 (de) 1993-09-09
US5330272A (en) 1994-07-19
DE59304376D1 (de) 1996-12-12
EP0558924A1 (fr) 1993-09-08

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