EP0124727B1 - Working cylinder - Google Patents

Working cylinder Download PDF

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Publication number
EP0124727B1
EP0124727B1 EP84102818A EP84102818A EP0124727B1 EP 0124727 B1 EP0124727 B1 EP 0124727B1 EP 84102818 A EP84102818 A EP 84102818A EP 84102818 A EP84102818 A EP 84102818A EP 0124727 B1 EP0124727 B1 EP 0124727B1
Authority
EP
European Patent Office
Prior art keywords
piston rod
cylinder
rod
piston
cylinder tube
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
Application number
EP84102818A
Other languages
German (de)
French (fr)
Other versions
EP0124727A3 (en
EP0124727A2 (en
Inventor
Erich Dipl.-Ing. Kleinknecht
Richard Pinter
Diether Dipl.-Ing. Slowak
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0124727A2 publication Critical patent/EP0124727A2/en
Publication of EP0124727A3 publication Critical patent/EP0124727A3/en
Application granted granted Critical
Publication of EP0124727B1 publication Critical patent/EP0124727B1/en
Expired 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/262—Locking mechanisms using friction, e.g. brake pads
    • 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
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2846—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using detection of markings, e.g. markings on the piston rod
    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means

Definitions

  • the invention is based on a working cylinder according to the preamble of main claim 1.
  • the braking device in the known working cylinder it is achieved that the piston rod can be braked to a certain extent exactly in a certain position.
  • the braking device receives a signal in the form of a pneumatic or hydraulic pressure, whereupon the piston rod is braked by a piston actuating an eccentric disk.
  • the piston rod can be rotated by the eccentric due to the braking process, which is often undesirable.
  • FIG. 1 shows a side view of a working cylinder, partly in section
  • FIG. 2 shows a top view of the working cylinder
  • FIG. 3 shows a section along III-III according to FIG. 2.
  • 10 denotes a cylinder tube which is closed on both sides by covers 11, 12 and via which the cylinder tube is clamped to the covers with the aid of four clamping screws 13.
  • An opening 14, 15 for supplying and discharging the pressure medium for actuating the piston or the piston rod is formed in each of the covers 11 and 12.
  • two through bores 16, 17 are formed in the cover 12, in which rods 18, 18 'are slidably guided and are connected at their end facing away from the cover 11 by a yoke 19.
  • the rod 18 is encoded, e.g. in that rings 20 made of a material with magnetic properties are inserted at certain intervals, which differ significantly from the magnetic properties of the material of the rod 18.
  • thread-like grooves can also be provided, which are filled with a similar material, or a band of magnetized material can also be inserted into the rod 18.
  • the piston rod is designated 25.
  • An eccentric ring 26 is slidably rotatably mounted on it, which is also supported in a bore 27 of the cover 12.
  • the eccentric 26 has an upstanding bolt 28 which engages in a slot 29 of a piston 30 which is slidably guided in a bore 31 of the braking device.
  • the piston 30 is acted upon by a valve 32 through a bore 32 and a line, not shown, with pressure medium. Contrary to the pressure medium pressure force acts on the piston 30 a compression spring 34 which is supported on a spring abutment 35 which is housed in a side part 36 of the braking device.
  • Such a braking device is known from DE-A-2515 566.
  • the compression spring 34 brings the piston 30 into such a position that the bolt 28 rotates the eccentric 26 so that it clamps the piston rod 25.
  • the electronics actuate the valve 23 in such a way that pressure medium flows through the bore 32 into the bore 31.
  • the piston 30 moves to the left, the pin 28 is pivoted counterclockwise in such a way that the eccentric ring 26 releases the piston rod.
  • the piston and piston rod now move. If this has reached a certain position, which is identified by the coding on the rod 18, the electronics 22 emits a signal to the valve 23, which now immediately stops the pressure medium flow to the bore 32. Now the compression spring 34 brings the braking device back into the braking position, the piston rod is immediately tightened.
  • the piston rod can be moved to any position and clamped there.
  • a compensating coupling 39 is provided between the yoke 19 and the piston rod 25 so that no rotation of the yoke 19 with the guide rods 18, 18 ′ is possible due to the eccentric movement acting on the piston rod 25.
  • This consists essentially of a cylindrical body 40 which is screwed onto the piston rod 25 by means of a screw bolt 41 and a nut 42 arranged at its end.
  • the cylindrical body 40 has a transverse slot 45, into which a disk 43 is inserted with a bolt 44 which extends toward the yoke and which is screwed to the yoke by means of a screw 46 arranged therein.
  • the cylindrical body 40 is thus firmly connected on the one hand to the piston rod 25, and on the other hand via the disk 43 and the bolt 44 with little axial and radial play with the yoke 19.

Landscapes

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

Description

Die Erfindung geht aus von einem Arbeitszylinder nach der Gattung des Hauptanspruchs 1. Mit der Bremseinrichtung wird bei dem bekannten Arbeitszylinder erreicht, dass die Kolbenstange einigermassen genau in einer bestimmten Stellung festgebremst werden kann. Dazu erhält die Bremseinrichtung ein Signal in Form eines pneumatischen oder hydraulischen Druckes, worauf die Kolbenstange über einen eine Exzenterscheibe betätigenden Kolben festgebremst wird. Dabei kann es jedoch geschehen, dass durch den Bremsvorgang die Kolbenstange durch den Exzenter verdreht werden kann, was häufig unerwünscht ist. Ausserdem ist es bei dem bekannten Arbeitszyiirrder nicht vorgesehen eine Wegmessung der Kolbenstange durchzuführen (DE-A-2515 566).The invention is based on a working cylinder according to the preamble of main claim 1. With the braking device in the known working cylinder it is achieved that the piston rod can be braked to a certain extent exactly in a certain position. For this purpose, the braking device receives a signal in the form of a pneumatic or hydraulic pressure, whereupon the piston rod is braked by a piston actuating an eccentric disk. However, it may happen that the piston rod can be rotated by the eccentric due to the braking process, which is often undesirable. In addition, it is not provided in the known rbeitszyiirrder A to perform a position measurement of the piston rod (DE-A-2 515 566).

Es ist im übrigen bekannt, die Stellung der Kolbenstange durch einen Detektor 26 festzustellen, welcher mit einem an der Kolbenstange in deren Längserstreckung angeordneten Indikator zusammenwirkt. Der Ausgang des Detektors führt beispielsweise zu einem Steuerventil. Durch dessen Steuerung wird die Bewegung der Kolbenstange korrigiert (DE-A-2032 625). Bei dieser Anordnung ist eine mit der Innenwand des Zylinders zusammenwirkende Bremse im Kolben vorgesehen.It is also known to determine the position of the piston rod by means of a detector 26 which interacts with an indicator arranged on the piston rod in its longitudinal extension. The output of the detector leads to a control valve, for example. The movement of the piston rod is corrected by its control (DE-A-2032 625). In this arrangement, a brake cooperating with the inner wall of the cylinder is provided in the piston.

Es ist eine Aufgabe der Erfindung, einen Ar- beitszyiinder nach der Gattung des Anspruchs 1 rl.i schaffen, bei dem die Kolbenstange in einer bestimmten Position sehr schnell festgespannt werden kann, ohne dass dabei störende Kräfte auf dieselbe einwirken, z.B. eine Verdrehung, und bei dem ferner die Position der Kolbenstange jederzeit exakt festgestellt und über eine entsprechende Programmierung der Bremseinrichtung signalisiert werden kann.It is an object of the invention beitszyiin a working he d according to the preamble of claim 1 rl.i create, in which the piston rod can be clamped fast in a predetermined position, without the disturbing forces acting on the same, for example, a torsion , and in which the position of the piston rod can also be determined exactly at any time and signaled by appropriate programming of the braking device.

Dies wird bei einem gattungsgemässen Arbeitszylinder durch die kennzeichnenden Merkmale des Anspruchs 1 erreicht.This is achieved in a generic cylinder by the characterizing features of claim 1.

Eine besonders exakte Führung der Kolbenstange und eine ebenfalls besonders gute Verdrehsicherung derselben, erhält man durch die Massnahme nach Anspruch 2.A particularly precise guidance of the piston rod and also a particularly good anti-rotation device are obtained by the measure according to claim 2.

ZeicnnungDrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine Seitenansicht eines Arbeitszylinders, teilweise im Schnitt, Figur 2 eine Draufsicht auf den Arbeitszylinder, Figur 3 einen Schnitt längs III-III nach Figur 2.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. FIG. 1 shows a side view of a working cylinder, partly in section, FIG. 2 shows a top view of the working cylinder, FIG. 3 shows a section along III-III according to FIG. 2.

Beschreibung des AusführungsbeispielsDescription of the embodiment

In den Figuren ist mit 10 ein Zylinderrohr bezeichnet, das beidseitig durch Deckel 11, 12 verschlossen ist und über welche das Zylinderrohr mit Hilfe von vier Spannschrauben 13 mit den Deckeln festgespannt wird. In den Deckeln 11 und 12 ist jeweils eine Öffnung 14,15 für das Zuführen bzw. Abführen des Druckmittels zum Betätigen des Kolbens bzw. der Kolbenstange ausgebildet.In the figures, 10 denotes a cylinder tube which is closed on both sides by covers 11, 12 and via which the cylinder tube is clamped to the covers with the aid of four clamping screws 13. An opening 14, 15 for supplying and discharging the pressure medium for actuating the piston or the piston rod is formed in each of the covers 11 and 12.

Seitlich und parallel zum Zylinderrohr 10 verlaufend sind im Deckel 12 zwei durchgehende Bohrungen 16, 17 ausgebildet, in welchen Stangen 18, 18' gleitend geführt sind, die an ihrem dem Deckel 11 abgewandten Ende durch ein Joch 19 verbunden sind. Die Stange 18 ist kodiert, z.B. dadurch, dass in bestimmten Abständen Ringe 20 aus einem Werkstoff mit magnetischen Eigenschaften eingelegt sind, die sich wesentlich von den magnetischen Eigenschaften des Werkstoffs der Stange 18 unterscheiden. Es können aber auch gewindeartige Rillen vorgesehen sein, die mit einem ähnlichen Material gefüllt sind oder es kann auch ein Band aus magnetisiertem Werkstoff in die Stange 18 eingelassen sein.Running laterally and parallel to the cylinder tube 10, two through bores 16, 17 are formed in the cover 12, in which rods 18, 18 'are slidably guided and are connected at their end facing away from the cover 11 by a yoke 19. The rod 18 is encoded, e.g. in that rings 20 made of a material with magnetic properties are inserted at certain intervals, which differ significantly from the magnetic properties of the material of the rod 18. However, thread-like grooves can also be provided, which are filled with a similar material, or a band of magnetized material can also be inserted into the rod 18.

Zum Abtasten der Position der Stange 18 und damit auch der Kolbenstange dient ein Sensor 21, der Teil einer auf dem Deckel 12 angeordneten Elektronik 22 ist. Mit Hilfe dieser Elektronik wird ein Steuerventil 23 betätigt, das über der Elektronik und auf dem Deckel sitzt und das zur Steuerung einer Bremseinrichtung 24 dient, die ebenfalls am Deckel 12 angeordnet ist.A sensor 21, which is part of electronics 22 arranged on the cover 12, is used to sense the position of the rod 18 and thus also the piston rod. With the help of this electronics, a control valve 23 is actuated, which sits above the electronics and on the cover and which serves to control a braking device 24, which is also arranged on the cover 12.

Die Kolbenstange ist mit 25 bezeichnet. Auf ihr ist gleitend drehbar ein Exzenterring 26 gelagert, der gleichzeitig auch in einer Bohrung 27 des Deckels 12 gelagert ist. Der Exzenter 26 hat einen nach obenstehenden Bolzen 28, der in einen Schlitz 29 eines Kolbens 30 greift, der in einer Bohrung 31 der Bremseinrichtung gleitend geführt ist. Der Kolben 30 wird über eine Bohrung 32 und eine nicht dargestellte Leitung vom Ventil 23 her mit Druckmittel beaufschlagt. Entgegen der Druckmitteldruckkraft wirkt auf den Kolben 30 eine Druckfeder 34, die sich an einem Federwiderlager 35 abstützt, das in einem Seitenteil 36 der Bremseinrichtung untergebracht ist. Eine derartige Bremseinrichtung ist bekannt aus der DE-A-2515 566.The piston rod is designated 25. An eccentric ring 26 is slidably rotatably mounted on it, which is also supported in a bore 27 of the cover 12. The eccentric 26 has an upstanding bolt 28 which engages in a slot 29 of a piston 30 which is slidably guided in a bore 31 of the braking device. The piston 30 is acted upon by a valve 32 through a bore 32 and a line, not shown, with pressure medium. Contrary to the pressure medium pressure force acts on the piston 30 a compression spring 34 which is supported on a spring abutment 35 which is housed in a side part 36 of the braking device. Such a braking device is known from DE-A-2515 566.

Wenn kein Druck in der Bohrung 31 ansteht, bringt die Druckfeder 34 den Kolben 30 in eine solche Position, dass der Bolzen 28 den Exzenter 26 so verdreht, dass er die Kolbenstange 25 festspannt.If there is no pressure in the bore 31, the compression spring 34 brings the piston 30 into such a position that the bolt 28 rotates the eccentric 26 so that it clamps the piston rod 25.

Soll die Kolbenstange 25 in eine bestimmte Position fahren, so wird von der Elektronik das Ventil 23 derart angesteuert, dass Druckmittel über die Bohrung 32 in die Bohrung 31 strömt. Dadurch bewegt sich der Kolben 30 nach links, der Bolzen 28 wird entgegen dem Uhrzeigersinn derart verschwenkt, dass der Exzenterring 26 die Kolbenstange freigibt. Durch Beaufschlagung des Kolbens im Zylinderrohr verfährt nun der Kolben samt Kolbenstange. Hat diese eine bestimmte Position erreicht, die durch die Kodierung auf der Stange 18 gekennzeichnet ist, so gibt die Elektronik 22 ein Signal an das Ventil 23, das nun sofort den Druckmittelzufluss zur Bohrung 32 stoppt. Jetzt bringt die Druckfeder 34 die Bremseinrichtung wieder in Bremsstellung, die Kolbenstange wird sofort festgespannt. Durch entsprechende Kodierung und Ansteuerung über die Elektronik kann die Kolbenstange in jede beliebige Stellung gefahren und dort festgespannt werden.If the piston rod 25 is to move into a specific position, the electronics actuate the valve 23 in such a way that pressure medium flows through the bore 32 into the bore 31. As a result, the piston 30 moves to the left, the pin 28 is pivoted counterclockwise in such a way that the eccentric ring 26 releases the piston rod. By acting on the piston in the cylinder barrel, the piston and piston rod now move. If this has reached a certain position, which is identified by the coding on the rod 18, the electronics 22 emits a signal to the valve 23, which now immediately stops the pressure medium flow to the bore 32. Now the compression spring 34 brings the braking device back into the braking position, the piston rod is immediately tightened. By appropriate coding and control via the electronics the piston rod can be moved to any position and clamped there.

Damit durch die auf die Kolbenstange 25 wirkende exzentrische Bewegung keine Verdrehung des Jochs 19 mit den Führungsstangen 18, 18' möglich ist, ist zwischen dem Joch 19 und der Kolbenstange 25 eine Ausgleichskupplung 39 vorgesehen. Diese besteht im wesentlichen aus einem zylindrischen Körper 40, der auf die Kolbenstange 25 mittels eines an ihrem Ende angeordneten Schraubenbolzen 41 und einer Mutter 42 aufgeschraubt ist. Der zylindrische Körper 40 weist einen Querschlitz 45 auf, in den eine Scheibe 43 eingesetzt ist mit einem zum Joch hin sich erstreckenden Bolzen 44, der mit dem Joch mittels einer in dieser angeordneten Schraube 46 verschraubt ist. Der zylindrische Körper 40 ist somit einerseits mit der Kolbenstange 25 fest verbunden, andererseits über die Scheibe 43 und den Bolzen 44 mit geringem axialem und radialem Spiel mit dem Joch 19.A compensating coupling 39 is provided between the yoke 19 and the piston rod 25 so that no rotation of the yoke 19 with the guide rods 18, 18 ′ is possible due to the eccentric movement acting on the piston rod 25. This consists essentially of a cylindrical body 40 which is screwed onto the piston rod 25 by means of a screw bolt 41 and a nut 42 arranged at its end. The cylindrical body 40 has a transverse slot 45, into which a disk 43 is inserted with a bolt 44 which extends toward the yoke and which is screwed to the yoke by means of a screw 46 arranged therein. The cylindrical body 40 is thus firmly connected on the one hand to the piston rod 25, and on the other hand via the disk 43 and the bolt 44 with little axial and radial play with the yoke 19.

Claims (4)

1. Working cylinder having a pressure-charged piston, which is guided in a cylinder tube (10) and has a piston rod (25), and having a brake device (24) for the piston rod (25), which brake device (24) is arranged at the end of the cylinder tube (10) in an attachment, characterized by the combination of the following features:
a) at least one guide rod (18,18') running parallel to the cylinder tube is mounted in sliding manner on a housing part (12) arranged on the cylinder tube (10), which guide rod (18, 18') is firmly connected to the piston rod (25);
b) a coding device (20) of any type for an electric displacement sensor (21) for the piston rod position is arranged on the guide rod (18), which coding device (20) runs in the longitudinal direction of the latter;
c) the guide rod (18) is connected with slight axial and radial play to the piston rod (25) via a compensating coupling (39) in order to keep the movement effects of the brake device (24) on the piston rod (25) away from the guide rod (18, 18').
2. Working cylinder according to Claim 1, characterized in that guide rods (18, 18') for the piston rod (25) are arranged on the cylinder or on a housing part (11, 12) arranged on the cylinder (10), which guide rods (18, 18') run on both sides and parallel to the cylinder tube, and that both guide rods are connected via a yoke (19) and the latter itself is in turn connected to the compensating coupling (39).
3. Working cylinder according to Claim 1 and/or 2, characterized in that the displacement sensor (21) is a part of an electronic control system (22) which is allocated to a control valve (23) via which a pressure medium is directed towards the brake device (24).
4. Working cylinder according to Claim 2, characterized in that the compensating coupling (39) consists of a cylindrical body which is screwed to the piston rod (25) and in which a transverse slot (42, 45) is made which accommodates a disc (43) having a pin (44), and that the disc, together with the pin, is screwed to the yoke (19) by means of a screw (46).
EP84102818A 1983-04-06 1984-03-15 Working cylinder Expired EP0124727B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8310037 1983-04-06
DE8310037U 1983-04-06

Publications (3)

Publication Number Publication Date
EP0124727A2 EP0124727A2 (en) 1984-11-14
EP0124727A3 EP0124727A3 (en) 1985-07-24
EP0124727B1 true EP0124727B1 (en) 1987-06-03

Family

ID=6751949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102818A Expired EP0124727B1 (en) 1983-04-06 1984-03-15 Working cylinder

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EP (1) EP0124727B1 (en)
JP (1) JPS59172802U (en)
DE (1) DE3464084D1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60263713A (en) * 1984-06-11 1985-12-27 Takashi Kimura Intermediate stop air pressure cylinder with reduction gear
FR2588328B1 (en) * 1985-10-04 1989-07-21 Schrader STOP AT ALL POINTS
JPH0419214Y2 (en) * 1986-01-21 1992-04-30
US4756229A (en) * 1986-09-25 1988-07-12 United Technologies Corporation Digital motor feedback for a position actuator
DE8703310U1 (en) * 1987-03-05 1988-06-30 Robert Bosch Gmbh, 7000 Stuttgart Working cylinder
JP2662817B2 (en) * 1989-08-03 1997-10-15 明男 松井 Cylinder stop device
DE29509582U1 (en) * 1995-06-12 1995-08-24 Afag AG für automatische Fertigungstechnik, Aarberg Linear module
EP2199624B1 (en) * 2008-12-17 2012-06-06 FESTO AG & Co. KG Fluid operated linear actuator with guiding unit
JP7063435B2 (en) * 2019-07-04 2022-05-09 Smc株式会社 Sensor fixtures and fluid pressure cylinders

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1751404A1 (en) * 1968-05-24 1971-09-09 Juergens Walter Hydraulic cylinder
FR1596551A (en) * 1968-07-31 1970-06-22
US3665812A (en) * 1969-07-01 1972-05-30 Chukyo Electric Co Apparatus for controlling rectilinear motion
CH600171A5 (en) * 1975-04-10 1978-06-15 Gatermann B Ingenieurbuero Gmb
DE2515566A1 (en) * 1975-04-10 1976-10-21 Gatermann Ingenieurbuero Gmbh Brake for cylindrical body - has sliding eccentric with notches engaged by piston rods
US4214795A (en) * 1977-11-25 1980-07-29 Shoketsu Kinzoku Kogyo Kabushiki Kaisha Piston braking device for hydraulic or pneumatic cylinders
JPS56106209U (en) * 1980-01-16 1981-08-18

Also Published As

Publication number Publication date
JPH0219604Y2 (en) 1990-05-30
DE3464084D1 (en) 1987-07-09
EP0124727A3 (en) 1985-07-24
JPS59172802U (en) 1984-11-19
EP0124727A2 (en) 1984-11-14

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