EP0177693A2 - Potentiomètre - Google Patents

Potentiomètre Download PDF

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Publication number
EP0177693A2
EP0177693A2 EP85109435A EP85109435A EP0177693A2 EP 0177693 A2 EP0177693 A2 EP 0177693A2 EP 85109435 A EP85109435 A EP 85109435A EP 85109435 A EP85109435 A EP 85109435A EP 0177693 A2 EP0177693 A2 EP 0177693A2
Authority
EP
European Patent Office
Prior art keywords
carrier
sliding contact
resistance track
piston rod
potentiometer
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.)
Granted
Application number
EP85109435A
Other languages
German (de)
English (en)
Other versions
EP0177693B1 (fr
EP0177693A3 (en
Inventor
Walter Dipl.-Ing. Brausfeld
Helmut Göttling
Rudolf Ing. grad. Möller
Peter Müller
Gerhard Ing. Grad. Scharnowski
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.)
Wabco Westinghouse Steuerungstechnik and Co GmbH
Original Assignee
Wabco Westinghouse Steuerungstechnik and Co 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 Wabco Westinghouse Steuerungstechnik and Co GmbH filed Critical Wabco Westinghouse Steuerungstechnik and Co GmbH
Priority to AT85109435T priority Critical patent/ATE43886T1/de
Publication of EP0177693A2 publication Critical patent/EP0177693A2/fr
Publication of EP0177693A3 publication Critical patent/EP0177693A3/de
Application granted granted Critical
Publication of EP0177693B1 publication Critical patent/EP0177693B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/38—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path
    • H01C10/44—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path the contact bridging and sliding along resistive element and parallel conducting bar or collector
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/38—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path

Definitions

  • the invention relates to a potentiometer, in particular for detecting the position of the piston of a pressure-actuated working cylinder, according to the preamble of patent claim 1.
  • a potentiometer consisting of a resistance track and a sliding contact on the working cylinder and to connect the sliding contact to the piston rod via a linkage or, in the case of rodless cylinders, to the piston using a driver .
  • the piston When the piston is lifted, it is attached to a rod-shaped support ordered sliding contact shifted on the resistance track between two points. With each change in the distance of the sliding contact to the two points, the voltage picked up by the potentiometer also changes. The respective voltage corresponds to the respective piston position.
  • the potentiometer must also have a large overall length. This means that the resistance track and the support designed as a rod for the sliding contact must have a length which corresponds to the maximum stroke of the piston.
  • the invention is therefore based on the object of providing a potentiometer of the type mentioned at the outset which is simple in construction and in which bending of the support for the sliding contact or of the support for the resistance track is prevented with simple means.
  • the invention offers the advantage, in particular, of creating a robust potentiometer with simple means, in which disturbances due to a short circuit between the potentiometer rod and the resistance path are excluded.
  • the potentiometer is integrated in a pressure-actuated working cylinder, whereby a compact unit consisting of a working cylinder and a device for detecting the piston position of the working cylinder is achieved.
  • the potentiometer is protected against damage when the piston rod is turned.
  • the carrier for the sliding contact and the sliding contact or the carrier and the connecting element between the carrier and the sliding contact can be rotated relative to one another, which also enables the carrier for the sliding contact to be rotated relative to the resistance track without the sliding contact and damage the resistance track.
  • the carrier for the resistance track is arranged protected within the tubular carrier for the sliding contact and is additionally supported and held by the connecting element between the carrier and the sliding contact.
  • the assembly and disassembly of the potentiometer is simplified by first inserting the connecting element into the tubular carrier for the sliding contact and then the resistor web-bearing carrier is inserted into a slot-shaped recess of the connecting element, the connecting element being pressed apart so far that a circumferential projection arranged on the connecting element engages in a corresponding recess in the tubular carrier, so that a connection between the tubular carrier and the connecting element arises, which allows a relative rotational movement between these two parts, but no relative movement in the axial direction.
  • Fig. 1 shows a working cylinder 1, in which a piston 8 connected to a piston rod 4 is arranged displaceably and sealed.
  • the piston 8 divides the working cylinder 1 into a first pressure medium chamber 3 on the piston rod side and one opposite the first pressure medium chamber 3 and a second pressure medium chamber 12 on the other side of the piston 8.
  • the two pressure medium chambers 3, 12 are each via a pressure medium connection 2 or 11 and one Valve device, not shown, can be connected to a pressure medium source.
  • the piston rod 4 has a preferably cylindrical recess 5 running in the direction of its longitudinal axis, which begins at the end of the piston rod 4 which extends into the cylinder 1 and, in the manner of a blind bore, in the direction of the recess 25 provided in the cylinder bottom from the Working cylinder 1 extends end portion of the piston rod 4 to.
  • the piston 8 and the piston rod 4 are formed and so ver together bound that the end of the piston rod 4 lying inside the working cylinder 1 is guided centrally through the piston 8.
  • a tubular body 6 is arranged coaxially to the piston rod 4 and extends into the recess 5 of the piston rod 4.
  • a sealing element 10 mounted in a groove 9 of the piston rod 4 surrounds the tubular body 6 and thus seals the recess 5 of the piston rod 4 against the second pressure medium chamber 12.
  • a carrier 19, preferably made of plastic, for a resistance track 13 and a conductor 18 is arranged in the tubular body 6. As shown in FIG. 2, the carrier 19 can consist of two identical parts 19a and 19b which are arranged symmetrically to one another. The outer contour of the carrier 19 is adapted to the inner wall of the tubular body 6.
  • Grooves 31, 32 are provided in the carrier 19 in the direction of the longitudinal axis of the carrier 19 and are used to guide a rod-shaped carrier 22 for sliding contacts 15, 16.
  • the resistance track 13 and the conductor 18 are inserted parallel to the longitudinal axis of the carrier 22 in corresponding grooves of the parts 19a, 19b and arranged to the carrier 22 such that the resistance track 13 interacts with the sliding contact 15 and the conductor 18 with the sliding contact 16.
  • the carrier 22 for the sliding contacts 15, 16 has an approximately cruciform profile and has a stepped part at its free end region for fastening the sliding contacts 15, 16 resiliently resting on the resistance track 13 and the conductor 18 .
  • the end of the carrier 22 facing away from the sliding contacts 15, 16 is connected via a coupling 23 to a bolt 26 which is in a bore 27 adjoining the recess 5 of the piston rod 4 the piston rod 4 is guided. Thread 29 is cut into the free end region of the bolt 26, onto which a nut 28 is screwed. The nut 28 is arranged in a counterbore 30 in the piston rod 4.
  • An elastic body 24 is arranged between the coupling and the conical bottom of the piston rod 4 delimiting the recess 5, which rests as a play compensation between the coupling 23 and the bottom. Electrical lines 7, 17, 14 are connected to the resistance track 13 and the conductor 18 and lead to a plug 21 arranged on the working cylinder 1.
  • the carrier for the resistance track and the conductor or the guide for the carrier 36 having the sliding contacts is designed as a tubular body 33.
  • a tubular body 33 Provided on the inner wall 37 of the tubular body 33 are two mutually opposite grooves 34 and 38 which run in the longitudinal direction of the body 33, a resistance track 39 being arranged on the groove base of the one groove 38 and a conductor 35 being arranged on the groove base of the other groove 34.
  • the carrier 36 for the sliding contacts 15, 16 is adapted to the contour of the wall of the tubular body 33 and has two mutually opposite projections which engage in the grooves 34, 38.
  • the corresponding projections arranged in the support for the resistance track 39 and the conductor 35 and the corresponding projections arranged on the support 33 for the sliding contacts 15, 16 are intended to prevent a twisting movement between the two supports 33, 36, ie between the resistance track, the conductor and the sliding contacts .
  • Any profile can be used for the sliding contact carrier, which prevents twisting movement between the sliding contact carrier and the carrier for the resistance track and can be easily sealed.
  • the coupling 23 is provided between the bolt 26, 29 and the carrier 22 for the sliding contacts.
  • FIG. 4 shows a working cylinder with an integrated potentiometer, in which both the carrier for the sliding contact and the carrier for the resistance track are each arranged in a tubular carrier.
  • the piston rod 4 has a recess 5 running in the direction of its longitudinal axis.
  • a carrier for two sliding contacts 44 conductively connected to one another is fastened to the coupling 23 located within the recess 5.
  • the carrier is designed as a tube 40 and has a holder 43 for the sliding contacts 44 in its free end region.
  • the tube 40 is arranged coaxially with a further tubular body 6, which is fastened to the base 20 of the cylinder.
  • the tubular body 6 and the tube 40 serving as a carrier for the sliding contacts 44 interact telescopically.
  • a carrier 41 made of plastic for a resistance track 42 and a conductor 48, which are arranged next to one another and are arranged parallel to the longitudinal axis of the carrier 41.
  • the carrier 41 is fastened to the base 20 and extends into the tube 40 having the sliding contacts 44.
  • the holder 43 for the sliding contacts 44 is designed such that it surrounds the carrier 41 and, when the sliding contacts 44 move, supports the carrier 41 for the resistance track 42 and the conductor 48 in the area traversed by the sliding contacts.
  • Connection lines 45, 46, 47 lead from the resistance track 42 and the conductor 48 to a plug 21 arranged on the cylinder 1.
  • the piston rod recess 5 is sealed against the second pressure medium chamber 12 by means of a between the wall 5 of the piston rod delimiting the recess and the outer surface of the tubular body 6 arranged sealing ring 10.
  • Fig. 5 shows a section through the piston rod 4, the two telescopically interacting tubes 6 and 40 and the support 41 for the resistance track 42 and the conductor 48.
  • the support 41 for the resistance track 42 and the conductor 48 has a semicircular cross section, wherein the straight surface carries the resistance track 42 and the conductor 48.
  • the function of the working cylinder shown in FIG. 4 is the same as the function of the working cylinder described in FIG. 1.
  • the potentiometer serving in the above exemplary embodiments as a device for detecting the position of the piston in a working cylinder can of course also be used as an independent component in or on other devices. For this purpose, it is only necessary to telescopically connect two pipes of different diameters, to fasten the support for the resistance track to the bottom of the one pipe in such a way that the support extends into the second pipe and to provide a sliding contact on the second pipe.
  • a guide for the carrier of the sliding contact In order to prevent the carrier for the sliding contact from bending, a guide for the carrier of the sliding contact must be arranged in the tube which has the resistance track.
  • the potentiometer can also consist of two telescopically interacting tubes, the sliding contact being arranged, for example, on the outer surface of the inner tube and, for example, the resistance track and the conductor being arranged in a groove in the inner wall of the outer tube.
  • the two tubes are dimensioned so that they support and guide each other along the entire length or at least part of their entire length.
  • a check valve can be provided, via which this space enclosed by the two telescopically interacting tubes can be vented into the pressure chamber or to the atmosphere.
  • the carrier having the resistance track or the sliding contact can be attached to its holder, e.g. the cylinder base, are mounted adjustable transversely to its longitudinal axis.
  • the potentiometer shown in FIG. 6 has a guide tube 51 which is screwed at one end into a stepped recess 67, 63 of a holding device 60.
  • a sealing ring 59 mounted in the wall delimiting the outer wall 67, 63 seals the gap between the outer surface of the guide tube 51 and the wall delimiting the recess 67, 63.
  • a further holding device 49 for the potentiometer is arranged, which encloses the guide tube 51.
  • a sealing ring 50 is also arranged between the lateral surface of the guide tube 51 and this holding device 49.
  • a tubular body serving as a carrier 53 for a sliding contact is inserted into the guide tube 51.
  • a bushing 52 which has a guiding function for the carrier 53, is mounted in a gradation 73 of the guide tube 51.
  • a ring serving as a stop 58 is mounted in the end region of the carrier 53 lying within the guide tube 51 in the end region of the carrier 53 lying within the guide tube 51 in the end region of the carrier 53 lying within the guide tube 51 there is a groove arranged in the lateral surface of the carrier 53 a ring serving as a stop 58 is mounted.
  • a scraper ring 74 is attached, which rests on the outer surface of the carrier 53 and thus prevents dirt from entering the interior of the potentiometer.
  • the tubular support 53 is closed at its end projecting from the guide tube 51 with the interposition of a sealing ring 75 by a cover 76.
  • a holder 64 for a carrier 54 having a resistance track 72 is mounted in the part 63 of the smaller diameter of the stepped recess 63, 67 arranged in the first holding device 60.
  • the carrier 4 for the resistance track 72 extends into the tubular carrier 53 for the sliding contact.
  • the holder 64 is fixed in the first holding device 60 by means of a screw 61 provided with a sealing ring 62.
  • a molded part made of plastic which serves as a connecting element 55, 70 between a sliding contact 69 and the support 53 and is divided in the direction of the longitudinal axis of the support 54.
  • Each of the two parts of the connecting element 55, 70 has a recess running in the direction of its longitudinal axis, which is essentially adapted to the contour of the carrier 54 for the resistance track 72, so that the connecting element 55, 70 and thus also the sliding contact with respect to the carrier 54 for the resistance track not twisted or across Longitudinal axis of the carrier 54 for the resistance track can be moved.
  • each of these two parts 55, 70 is a bulge-like projection 57 and 71, which engages in a circumferential groove 56 arranged in the wall of the tubular support 53.
  • the recesses arranged in the two parts 55 and 70 are dimensioned such that the two parts 55, 70 are pressed lightly against the wall of the tubular support 53 for the sliding contact by the support 54 having the resistance track 72. This measure prevents the projections 57, 71 of the two parts 55, 70 from emerging during a relative movement between the support 54 having the resistance track 72 and the support 53 connected to the sliding contact 69 via the connecting element 55, 70 in the direction of its longitudinal axis Jump out groove 56.
  • the sliding contact 69 is designed as an angled leaf spring, which is fastened by means of a screw 68 to the end face of the part 70 of the connecting element 55, 70.
  • the recess in the sliding contact 69 for receiving the screw 68 has the shape of an elongated hole, so that the bias with which the sliding contact 69 is to rest on the resistance track 72 can be changed by moving the sliding contact 69 towards the resistance track or away from it can.
  • the potentiometer described above is installed in such a way that first the support 54 having the resistance track 72 is inserted with its holder 64 into the recess 63 of the first holding device 60 and secured by means of the screw 61.
  • the two parts 55, 70 of the connecting element are inserted into the tubular support 53 for the sliding contact 69, namely until the circumferential projections 57, 71 of the two parts 55, 70 enter the groove 56 of the tubular support 53.
  • the connecting element consisting of the two parts 55, 70 is held in the tubular carrier 53.
  • the carrier 54 having the resistance track 72 is then inserted into the recess of the connecting element 55, 70, as a result of which the two parts 55, 70 are held against the wall of the tubular carrier 53 under slight pressure.
  • the tubular support 53 is pushed onto the holder of the support 54 having the resistance track 72 until it comes into contact with the gradation of the recess 63, 67 of the first holding device 60.
  • the guide tube 51 provided with the second holding device 49 is pushed onto the tubular support 53 and screwed with its end region facing the first holding device 60 into the threaded part 67 of the stepped recess 63, 67 of the first holding device.
  • the connecting element between the carrier 53 and the sliding contact 69 can be formed in one piece and have a slot-shaped recess running in the direction of its longitudinal axis for receiving the carrier 54 having the resistance track 72, which corresponds approximately to the profile of the carrier 54 for the resistance track 72.
  • Such an embodiment of the connecting element has the advantage that the connecting element can be inserted into the tubular support 53 with slight prestress, so that when the groove-like recess 56 in the tubular support 53 is reached, the circumferential projection arranged on the circumference of the connecting element automatically enters the groove-like recess 56 clicks into place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
EP85109435A 1984-10-05 1985-07-26 Potentiomètre Expired EP0177693B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85109435T ATE43886T1 (de) 1984-10-05 1985-07-26 Potentiometer.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3436560 1984-10-05
DE3436560 1984-10-05
DE3520199 1985-06-05
DE19853520199 DE3520199A1 (de) 1984-10-05 1985-06-05 Potentiometer

Publications (3)

Publication Number Publication Date
EP0177693A2 true EP0177693A2 (fr) 1986-04-16
EP0177693A3 EP0177693A3 (en) 1986-08-13
EP0177693B1 EP0177693B1 (fr) 1989-06-07

Family

ID=25825404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109435A Expired EP0177693B1 (fr) 1984-10-05 1985-07-26 Potentiomètre

Country Status (3)

Country Link
US (1) US4656457A (fr)
EP (1) EP0177693B1 (fr)
DE (2) DE3520199A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744085A1 (de) * 1987-12-24 1989-07-06 Bochumer Eisen Heintzmann Hydraulischer mehrfachteleskopzylinder
EP0268030A3 (en) * 1986-11-15 1989-11-29 Wabco Westinghouse Steuerungstechnik Gmbh & Co. Potentiometer or adjustable resistorce
EP0536926A1 (fr) * 1991-10-09 1993-04-14 Emhart Glass Machinery Investments Inc. Détecteur de mouvement à effet hall
EP0559634A1 (fr) * 1992-03-02 1993-09-08 Hoerbiger Ventilwerke Aktiengesellschaft Capteur de position
DE4228307A1 (de) * 1992-08-26 1994-03-03 Rexroth Mannesmann Gmbh Hydraulisches Gerät mit einem Wegaufnehmer
WO1997032138A1 (fr) * 1996-03-01 1997-09-04 Emg-Eltma Gmbh Appareil de levage electro-hydraulique
WO2007112745A1 (fr) * 2006-03-30 2007-10-11 Linak A/S Actionneur lineaire avec potentiometre
CN111059995A (zh) * 2019-12-28 2020-04-24 浙江大学 一种基于摩擦纳米发电机的自驱动位移传感器

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US4753028A (en) * 1986-12-15 1988-06-28 Farmer Thomas E Goose decoy
US4803318A (en) * 1988-01-07 1989-02-07 Lymburner Robert K Proximity switch for a cylinder
US4879440A (en) * 1988-01-07 1989-11-07 Lymburner Robert K Proximity switch for a cylinder
DE3907944A1 (de) * 1989-03-11 1990-09-13 Bochumer Eisen Heintzmann Stellvorrichtung mit einem zylinder und einem in dem zylinder gefuehrten kolben
US4982652A (en) * 1989-05-19 1991-01-08 Blatt John A Fluid operated actuator with recessed position sensor and recessed end cap fastener
JPH0341208U (fr) * 1989-08-31 1991-04-19
DE4015720A1 (de) * 1990-05-16 1992-04-09 Helag Electronic Gmbh Elektrischer weg- oder winkelsensor
DE4105702A1 (de) * 1991-02-21 1992-09-03 Mannesmann Ag Linearer wegaufnehmer
SE510803C2 (sv) * 1994-12-13 1999-06-28 Volvo Ab Tryckmediepåverkad manöveranordning
DE29508517U1 (de) * 1995-05-23 1995-08-10 Festo Kg, 73734 Esslingen Kolbenstangenloser Linearantrieb
US5704268A (en) * 1995-07-26 1998-01-06 Thermo Fibertek Inc. Electro-hydraulic shower oscillator for papermaking
DE19634308A1 (de) * 1996-08-24 1998-02-26 Roemheld A Gmbh & Co Kg Wegmeßsystem für Lineareinheiten
US5886617A (en) * 1997-06-18 1999-03-23 Ingersoll-Rand Company Composite tube transducer cylinder
FR2794236B1 (fr) * 1999-05-26 2006-06-16 Serta Dispositif permettant de connaitre la position et de mesurer les deplacements du piston ou de la tige de piston dans la chambre d'un verin du type comprenant un capteur potentiometrique rectiligne lineaire
DE19956307C1 (de) * 1999-11-12 2001-01-04 Mannesmann Ag Potentiometer
US6455800B1 (en) 2001-01-04 2002-09-24 Festo Corporation Servo-pneumatic modular weld gun
DE60140295D1 (de) * 2001-06-07 2009-12-10 Gefran Spa Anordnung eines Positionssensors in einer Kolben-Zylinder-Einheit
DE10337599B4 (de) * 2003-08-16 2006-04-13 Festo Ag & Co. Kontraktionseinheit mit Positionserfassungseinrichtung
WO2007011402A2 (fr) * 2004-10-26 2007-01-25 Georgia Tech Research Corporation Capteur de deplacement
FR2864222A1 (fr) * 2005-02-16 2005-06-24 Realisarions Tech Appliquees S Dispositif permettant de connaitre la position et de mesurer le deplacement du piston ou de la tige de piston dans la chambre d'un verin
US7234386B2 (en) * 2005-08-26 2007-06-26 Husco International, Inc. Three chamber hydraulic cylinder for an active vehicle suspension with integrated load leveling
US20090058430A1 (en) * 2007-09-05 2009-03-05 Sentrinsic Systems and Methods for Sensing Positions of Components
CN103127579B (zh) * 2011-11-21 2017-06-16 上海泽生科技开发股份有限公司 便携式注射泵的驱动系统
DE102015009990A1 (de) * 2015-07-31 2017-02-02 MAQUET GmbH Vorrichtung zur Positionserfassung beweglicher Operationstisch-Komponenten
US10787109B2 (en) 2016-11-11 2020-09-29 Herzog Railroad Services, Inc. System and method for operating a ballast car hopper door
PL240619B1 (pl) * 2018-03-30 2022-05-09 Politechnika Gdanska Urządzenie do pomiaru wysunięcia tłoczyska siłownika hydraulicznego
PL240618B1 (pl) * 2018-03-30 2022-05-09 Politechnika Gdanska Urządzenie do pomiaru wysunięcia tłoczyska siłownika hydraulicznego
US11248427B2 (en) 2018-08-06 2022-02-15 Schlumberger Technology Corporation Systems and methods for manipulating wellbore completion products
CN115917115A (zh) * 2020-05-02 2023-04-04 斯伦贝谢技术有限公司 用于定位移位轮廓几何的系统和方法
US12460482B2 (en) * 2023-06-23 2025-11-04 Halliburton Energy Services, Inc. Absolute linear position for downhole tool using rotary potentiometer

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US2644427A (en) * 1948-07-16 1953-07-07 Sperry Corp Servo system
US2998587A (en) * 1953-04-30 1961-08-29 Bourns Inc Linear motion variable resistor
DK104894C (da) * 1964-11-21 1966-07-18 Leif Erik Soerensen Glidepotentiometer, der samarbejder med en hydraulisk stempelmekanisme.
US3364454A (en) * 1965-06-22 1968-01-16 Beckman Instruments Inc Variable resistance device
FR1524363A (fr) * 1967-03-31 1968-05-10 Rayonnage démontable
US3572214A (en) * 1968-12-04 1971-03-23 Ford Motor Co Vacuum motor adapted for use in a vehicle speed control mechanism
US3726191A (en) * 1971-02-08 1973-04-10 Bunker Ramo Electrically controlled hydraulic system and transducer therefor
US4523514A (en) * 1981-09-08 1985-06-18 Deere & Company Position sensing cylinder
GB2117828B (en) * 1982-03-26 1985-08-14 Moog Inc Linear actuator with piston position transducer
DE3325399C2 (de) * 1983-07-14 1985-10-31 Integral Hydraulik & Co, 4000 Düsseldorf Hydraulik-Zylinder mit innenliegender Wegumformung
DE3325400C2 (de) * 1983-07-14 1986-04-10 Integral Hydraulik & Co, 4000 Düsseldorf Hydraulik-Zylinder mit innenliegender Wegumformung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0268030A3 (en) * 1986-11-15 1989-11-29 Wabco Westinghouse Steuerungstechnik Gmbh & Co. Potentiometer or adjustable resistorce
DE3744085A1 (de) * 1987-12-24 1989-07-06 Bochumer Eisen Heintzmann Hydraulischer mehrfachteleskopzylinder
EP0536926A1 (fr) * 1991-10-09 1993-04-14 Emhart Glass Machinery Investments Inc. Détecteur de mouvement à effet hall
US5318616A (en) * 1991-10-09 1994-06-07 Emhart Glass Machinery Investments Inc. Plunger mechanism with a Hall sensor movement detection device for a glassware forming machine
EP0559634A1 (fr) * 1992-03-02 1993-09-08 Hoerbiger Ventilwerke Aktiengesellschaft Capteur de position
DE4228307A1 (de) * 1992-08-26 1994-03-03 Rexroth Mannesmann Gmbh Hydraulisches Gerät mit einem Wegaufnehmer
WO1997032138A1 (fr) * 1996-03-01 1997-09-04 Emg-Eltma Gmbh Appareil de levage electro-hydraulique
WO2007112745A1 (fr) * 2006-03-30 2007-10-11 Linak A/S Actionneur lineaire avec potentiometre
CN111059995A (zh) * 2019-12-28 2020-04-24 浙江大学 一种基于摩擦纳米发电机的自驱动位移传感器

Also Published As

Publication number Publication date
EP0177693B1 (fr) 1989-06-07
DE3570906D1 (en) 1989-07-13
DE3520199A1 (de) 1986-04-10
US4656457A (en) 1987-04-07
EP0177693A3 (en) 1986-08-13

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