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EP0181415B1 - Dispositif de positionnement pour vérin sans tige - Google Patents

Dispositif de positionnement pour vérin sans tige Download PDF

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Publication number
EP0181415B1
EP0181415B1 EP84113772A EP84113772A EP0181415B1 EP 0181415 B1 EP0181415 B1 EP 0181415B1 EP 84113772 A EP84113772 A EP 84113772A EP 84113772 A EP84113772 A EP 84113772A EP 0181415 B1 EP0181415 B1 EP 0181415B1
Authority
EP
European Patent Office
Prior art keywords
cylinder body
markings
piston
measuring
positioning device
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
EP84113772A
Other languages
German (de)
English (en)
Other versions
EP0181415A1 (fr
Inventor
Dieter Mai
Karl Wydra
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.)
Knorr Bremse AG
Original Assignee
Knorr Bremse AG
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
Priority to DE19833317113 priority Critical patent/DE3317113A1/de
Application filed by Knorr Bremse AG filed Critical Knorr Bremse AG
Priority to EP84113772A priority patent/EP0181415B1/fr
Priority to DE8484113772T priority patent/DE3469781D1/de
Publication of EP0181415A1 publication Critical patent/EP0181415A1/fr
Application granted granted Critical
Publication of EP0181415B1 publication Critical patent/EP0181415B1/fr
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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/084—Characterised by the construction of the motor unit the motor being of the rodless piston type, e.g. with cable, belt or chain
    • 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
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
    • 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
    • F15B15/2853—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using potentiometers
    • 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 relates to a positioning device with the features specified in the preambles of independent claims 1, 5 or 7.
  • Rodless cylinders are known in different embodiments.
  • the coupling members connecting the piston to the power delivery slide comprise a band connected to the piston, which is guided to the power delivery slide via deflection rollers arranged on both piston ends and is likewise fastened to the power delivery slide.
  • the power delivery slide can be guided in a longitudinally displaceable manner on the cylinder body and provided with a brake, by means of which it can be locked in any stroke position.
  • the rodless cylinders are particularly advantageous for applications in robot-type devices, for example handling devices, since they allow large stroke lengths to be carried out with a short installation length.
  • rodless cylinders to provide stroke switches, for example reed switches, which can be switched by the piston without contact.
  • stroke switches for example reed switches
  • pneumatically actuated cylinders have caused difficulties due to the compressibility of the compressed air.
  • Positioning devices are already known for cylinders provided with piston rods, which enable the setting of precise, predeterminable piston stroke positions.
  • the sensor signals are added to counters to display the piston position in an evaluation circuit.
  • the publication also shows that the signals from three sensors arranged on half the marking division can be fed to three coils arranged at an angle of 120 ° each, the rotating field of which control a magnetic needle indicating the position of the piston rod.
  • the document shows a magnetic tape to be arranged on the piston rod with two separately scannable rows of markings, one of which has a much greater division than the other row of marks.
  • FIGS. 1 to 3 different embodiments for positioning devices designed according to the invention are shown, for example.
  • a rodless cylinder is provided with a cylinder body 1, in the piston guide 2 of which a piston 3 is guided so as to be axially displaceable in a sealed manner.
  • the cylinder body 2 Near its two ends, the cylinder body 2 is provided with line connections 4, through which the piston 3 can be acted upon from both sides with pressure medium, preferably compressed air.
  • Pressure medium preferably compressed air.
  • Switching valves can be connected, via which the pressure medium applied to the piston 3 can be controlled.
  • a piston 5, preferably a thin steel strip, extends from the piston 3 on both sides and slidably extends through the cylinder covers 6 of the cylinder body 1 on both sides by a seal 7, which is only indicated.
  • Deflection rollers 9 are supported on the cylinder covers 6 by means of bearing blocks 8, over which the band 5 is guided and deflected by approximately 180 °, such that it extends from one to the other deflection roller 9 in a region 10 to the side next to the cylinder body 1.
  • a power delivery carriage 11 is held on the belt 5, which is displaceable in the direction of the arrow 12 parallel to the longitudinal direction of the cylinder body 1.
  • the band 5 can be designed as a closed loop, on which the piston 3 and the power delivery slide 11 are held, it can consist of a piece of tape, the ends of which are connected to one another on the piston 3 or the power delivery slide 11, or two band pieces can be provided, which each extend from the piston 3 to the power delivery carriage 11.
  • the power delivery carriage 11 can be guided in a longitudinally displaceable manner in any manner, for example it can be guided on the cylinder body 1 in the manner apparent from DE-A-2 945 133 or DE-A-3 124 915 and can be braked with respect thereto.
  • a preferably made of plastic strip 13 is attached to the cylinder body 1, which extends below the range of motion of the power output slide 11 and which on its side facing away from the cylinder body 1 carries a magnetic tape 14 which can only be seen as a line in the side view, the Magnetic tape can be designed in the manner of the usual magnetic tapes.
  • the magnetic tape 14 is provided in the longitudinal direction of the cylinder body 1 with a series of digital, magnetic markings, for example magnetically stamped cross lines.
  • the power delivery carriage 11 carries a sensor 15, the receiving head of which faces the cylinder body in such a way that it is able to record the magnetic markings of the magnetic tape 14.
  • the sensor 15 When moving the power delivery sled 11, the sensor 15 thus emits sensor signals corresponding to the markings of the magnetic tape 14 that are moving relative to it, which signals are removed from the power delivery sled 11 via lines (not shown) and processed in a processing device (not shown) such that the respective position of the Power output sled 11 indicating, analog or digital output signal and / or control signals for the switching valves are formed such that the power output sled 11 is controlled by a corresponding actuation control of the piston 3 in a predetermined, specific position and is braked in this, if necessary.
  • the magnetic markings in one or more rows of markings on the band 5 made of steel or provided with a magnetic tape.
  • the sensor 18 scanning the markings can then be arranged according to FIG. 2 at a suitable location, preferably near a deflection roller 9 on the cylinder body 1.
  • a sensor 19 which is fastened to a bearing block 8 and which scans the band 5 in the area of its support on the associated deflection roller 9 with regard to the marking signals.
  • fixed sensors 18 and 19 can be used, which facilitates the removal of the sensor signals.
  • the cylinder according to FIG. 3 which shows a cross section through the cylinder, has a cylinder body 1, which is provided laterally next to the piston guide 2 with an elongate recess 20 parallel to the latter, for receiving guide and / or braking elements 21 of the power output slide 11, wherein the guiding and / or braking elements 21 are connected to the power output slide 11 by a connecting element 23 projecting outwardly from the recess 20 through an opening slot 22 and the opening slot 22 on both sides of the power output slide 11 cannot be covered in a manner not apparent from FIG. 3, it is expedient to arrange the measuring element formed from a measuring body fixed to the cylinder body and a sensor fixed to the force-transmitting carriage in the region of the recess 20. From FIG.
  • the cylinder body 1 on the bottom side of the recess 20 has a measuring tape 24 embedded in a longitudinal groove, for example formed according to the strip 13 and the magnetic tape 14 according to FIG. 1, which extends over the entire guide length for the power delivery slide 11 extends.
  • the guiding and / or braking elements 21 or the connecting elements 23 of the force output slide 11 are provided opposite the measuring tape 24 with a sensor 25, which is able to scan the markings on the measuring tape 24.
  • the structure and function of the measuring tape 24 and sensor 25 thus largely correspond to those of the magnetic tape 14 and sensor 15 according to FIG. 1, but they are arranged in a very well-protected position, so that the cylinder can be used even in a heavily contaminated environment or atmosphere Malfunction of the positioning device is operable.
  • the strip 13 which The annular surface 16, the band 5 or the measuring band 24 can also be provided with different types of markings, for example optical or structural types, the sensor of course having to be adapted to these types of markings.
  • markings for example optical or structural types
  • the sensor of course having to be adapted to these types of markings.
  • the annular surface 16 does not have to be arranged directly on a deflection roller 9, it can also be located on a separate measuring wheel to be connected to the deflection roller 9 in a rotationally fixed manner.
  • the markings mechanically, for example as tooth-like protrusions, which are scanned optically or magnetically by the sensors.
  • This arrangement is particularly expedient in the case of an annular arrangement of the markings, for example on the annular surface 16 or a measuring wheel connected to the deflection roller 9. It is also possible to connect one of the deflection rollers 9 to the setting shaft of a potentiometer, so that the latter outputs changes in resistance corresponding to the piston position as measured values.
  • the measuring organ embodiment according to FIG. 1 with sensor 15 or FIG. 3 can be used for any type of rodless cylinder, while the other exemplary embodiments in their application to so-called band cylinders, in which the coupling links form a band 5 have are limited.
  • Correspondingly designed measuring elements with sensors 17 or 19 corresponding sensors can also be used in rodless cylinders in which the force is output by a shaft that can be driven by a belt or a threaded rod by the piston.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Claims (11)

1. Dispositif de positionnement pour des cylindres sans tige de piston, qui possèdent un piston (3) qui est guidé axialement dans un corps de cylindre ( 1 ) et qui est susceptible d'être chargé sur un côté ou sur ses deux côtés avec un milieu sous pression, ainsi qu'un chariot de prise de force (11) qui est accouplé à l'aide d'éléments d'accouplement (5, 9) au piston (2) et qui est éventuellement guidé de manière à se déplacer longitudinalement par rapport au corps de cylindre (1), caractérisé par le fait qu'entre le corps de cylindre (1 ) et le chariot de prise de force (11 ) est prévu un organe de mesure qui émet des signaux de mesure lors des déplacements relatifs entre ledit corps de cylindre et ledit chariot, lequel organe de mesure comporte un ruban de mesure (13, 14; 24) qui est monté de façon fixe sur le corps de cylindre (1 ), qui s'étend sur toute la course du chariot de prise de force et qui porte des repères longitudinaux analogiques ou numériques, lequel ruban de mesure est susceptible d'être détecté par un détecteur (15; 25) qui est monté de façon fixe sur le chariot de prise de force (11) et qui est disposé directement en face du ruban de mesure (13, 14; 24), lequel détecteur (15; 25) émet, en fonction des repères longitudinaux qui se déplacent par rapport à lui, des signaux de détection (figures 1, 3).
2. Dispositif de positionnement selon la revendication 1, caractérisé par le fait que le ruban de mesure (24) se trouve près de sa face de guidage ou de freinage (21 ) pour le chariot de prise de force (11), sur le corps de cylindre (1) (figure 3).
3. Dispositif de positionnement selon la revendication 2, caractérisé par le fait que le ruban de mesure (24) se trouve dans une ouverture de guidage (20) du corps de cylindre (1) qui est réalisé d'une seule ou de plusieurs pièces, qui s'étend parallèlement du guidage de piston (2), qui reçoit les surfaces de guidage ou de freinage (21) et qui est susceptible d'être recouverte par rapport à l'extérieur à l'aide d'un ruban de couverture qui est susceptible d'être soulevé par le chariot de prise de force (11) (figure 3).
4. Dispositif de positionnement selon la revendication 1, 2 ou 3, caractérisé par le fait que le ruban de mesure (24) se trouve sur une réglette en matière plastique (13) et qui est montée dans une gorge longitudinale du corps de cylindre (1).
5. Dispositif de positionnement pour des cylindres sans tige de piston, qui comportent un piston (3) qui est guidé axialement dans un corps de cylindre ( 1 ) et qui est susceptible d'être chargé sur un ou sur deux côtés avec un milieu sous pression, ainsi qu'un chariot de prise de force (11) qui est accouplé, par l'intermédiaire d'organes d'accouplement (5, 9), avec le piston (3) et qui est éventuellement guidé le long du corps de cylindre (1), du type dans lequel les organes d'accouplement comprennent un ruban qui passe sur des galets de renvoi (9) et qui relie le piston (3) avec le chariot de prise de force (11), caractérisé par le fait qu'entre le ruban (5) et le corps de cylindre (1) est monté un organe de mesure qui émet des signaux de mesure lors de déplacements relatifs entre le ruban et le corps de cylindre, ledit organe de mesure comportant des repères longitudinaux numériques disposés sur le ruban (5) ainsi qu'un détecteur (18, 19) qui est solidaire du carter qui se situe directement en face des repères longitudinaux et qui détecte ceux-ci, ledit détecteur émettant des signaux de détection en fonction des repères longitudinaux qui se déplacent relativement par rapport à lui (figure 2).
6. Dispositif de positionnement selon la revendication 5, caractérisé par le fait que les repères longitudinaux sont réalisés sous la forme de repères à trous du ruban (5).
7. Dispositif de positionnement pour des cylindres sans tige de piston, qui comportent un piston (3) qui est guidé axialement dans un corps de cylindre ( 1 ) et qui est susceptible d'être chargé sur un ou sur deux côtés avec un milieu sous pression, ainsi qu'un chariot de prise de force (11) qui est accouplé, par l'intermédiaire d'organes d'accouplement (5, 9), avec le piston (3) et qui est éventuellement guidé le long du corps de cylindre (1 du type dans lequel les organes d'accouplement comprennent un ruban qui passe sur des galets de renvoi (9) et qui relient le piston (3) avec le chariot de prise de force (11), caractérisé par le faitqu'entre au moins un galet de renvoi (9) et le corps de cylindre (1) est monté un organe de mesure qui émet des signaux de mesure lors de mouvements de rotation du galet de renvoi (9), ledit organe de mesure comprenant une surface annulaire (16) disposée sur le galat de renvoi (9) ou sur une roue de mesure qui est solidaire en rotation dudit galet de renvoi, ainsi qu'un détecteur qui est monté fixe sur le corps de cylindre (1) et directement en face de la surface annulaire (16), la réalisation étant telle que la surface annulaire (16) est pourvue de repères numériques ou analogiques qui se déplacent avec celle-ci, de façon à être détecté par le détecteur (18, 19), celui-ci émettant des signaux de détection en fonction des repères qui se déplacent par rapport à lui.
8. Dispositif de positionnement selon la revendication 7, caractérisé par le fait que les repères du galet de renvoi (9) ou de la roue de mesure, sont réalisés sous la forme d'appendice mécanique à la manière d'une denture.
9. Dispositif de positionnement selon l'une des revendications 1 à 4 ou 7, caractérisé par le fait que le ruban de mesure qui porte les repères analogiques longitudinaux ou la surface annulaire qui porte les repères analogiques, est réalisé sous la forme d'une résistance électrique qui peut être détectée ou palpée, à la manière d'un rhéostat ou d'un potentiomètre, par l'organe de mesure qui répond à des variations de la résistance.
10. Dispositif de positionnement suivant l'une des revendications 1 à 5 ou 7, caractérisé par le fait que les repères numériques longitudinaux ou les repères qui sont disposés de façon à tourner, sont réalisés sous la forme de repères magnétiques ou optiques, auxquelles est associé un organe de mesure correspondant, qui agit par voie magnétique ou optique.
11. Dispositif de positionnement selon la revendication 10, caractérisé par le fait que les repères magnétiques sont prévus sur une bande magnétique qui constitue le ruban de mesure (14) ou la surface annulaire (16), ou qui est reliée au ruban (5).
EP84113772A 1983-05-10 1984-11-14 Dispositif de positionnement pour vérin sans tige Expired EP0181415B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19833317113 DE3317113A1 (de) 1983-05-10 1983-05-10 Positioniereinrichtung fuer kolbenstangenlose zylinder
EP84113772A EP0181415B1 (fr) 1983-05-10 1984-11-14 Dispositif de positionnement pour vérin sans tige
DE8484113772T DE3469781D1 (en) 1984-11-14 1984-11-14 Positioning device for a rodless actuator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833317113 DE3317113A1 (de) 1983-05-10 1983-05-10 Positioniereinrichtung fuer kolbenstangenlose zylinder
EP84113772A EP0181415B1 (fr) 1983-05-10 1984-11-14 Dispositif de positionnement pour vérin sans tige

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP86103865A Division EP0196572A3 (fr) 1984-11-14 1984-11-14 Dispositif de positionnement pour vérin sans tige
EP86103865.1 Division-Into 1986-03-21

Publications (2)

Publication Number Publication Date
EP0181415A1 EP0181415A1 (fr) 1986-05-21
EP0181415B1 true EP0181415B1 (fr) 1988-03-09

Family

ID=25810683

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113772A Expired EP0181415B1 (fr) 1983-05-10 1984-11-14 Dispositif de positionnement pour vérin sans tige

Country Status (2)

Country Link
EP (1) EP0181415B1 (fr)
DE (1) DE3317113A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3436946C2 (de) * 1984-10-09 1994-06-09 Mannesmann Ag Linearantrieb
DE8525587U1 (de) * 1985-09-07 1987-01-08 Robert Bosch Gmbh, 7000 Stuttgart Wegmeßeinrichtung
DE3619473A1 (de) * 1986-06-10 1987-12-17 Knorr Bremse Ag Druckmittelgetriebener, kolbenstangenloser arbeitszylinder
SE454288B (sv) * 1986-08-21 1988-04-18 Bo Granbom Anordning vid pneumatiska cylinder-kolvanordningar
US4781066A (en) * 1986-08-22 1988-11-01 Gilbarco Inc. Linear sensing apparatus for positive displacement meter
DE3731073A1 (de) * 1987-09-16 1989-03-30 Wabco Westinghouse Steuerung Linearantrieb
DE3822103A1 (de) * 1988-06-30 1990-02-08 Winkler Duennebier Kg Masch Vorrichtung zum verschieben von teilen
DE3905561C2 (de) * 1989-02-23 1995-04-20 Rexroth Pneumatik Mannesmann Druckmittelbetätigbarer Arbeitszylinder
DE3909344A1 (de) * 1989-03-22 1990-09-27 Rexroth Pneumatik Mannesmann Druckmittelbetaetigbarer arbeitszylinder
DE29505345U1 (de) * 1995-03-31 1995-05-18 Festo Kg, 73734 Esslingen Abtriebsglied eines Linearantriebes
DE20100672U1 (de) 2001-01-16 2001-03-22 Festo AG & Co, 73734 Esslingen Linearantrieb mit Positionserfassungseinrichtung
DE102007024033A1 (de) * 2007-05-23 2008-11-27 Schaeffler Kg Linearantrieb
DE102019207270A1 (de) 2019-05-17 2020-11-19 Volkswagen Aktiengesellschaft Anlage sowie Verfahren zur Betätigung einer Verfahreinheit der Anlage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1897277U (de) * 1963-10-22 1964-07-23 Festo Maschf Stoll G Fuer den betrieb mit einem pneumatischen druckmedium bestimmter arbeitszylinder.

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Publication number Priority date Publication date Assignee Title
US3956973A (en) * 1972-07-11 1976-05-18 Basic Aluminum Castings Company Die casting machine with piston positioning control
FR2233512A1 (en) * 1973-06-14 1975-01-10 Repiquet Sa Vice with controlled displacement - has plastic marks on stem for photodetector
DE2348066A1 (de) 1973-09-25 1975-03-27 Schloemann Siemag Ag Druckmittelzylinder mit einer vorrichtung zur erfassung von kolbenpositionen
DE2855681A1 (de) * 1978-12-21 1980-06-26 Kracht Pumpen Motoren Mit einem fluid zu betreibender antriebszylinder
DE2933557C2 (de) 1979-08-18 1982-11-04 Robert Bosch Gmbh, 7000 Stuttgart Meßumformer zur berührungslosen Weg- oder Geschwindigkeitsmessung
DE2945895C2 (de) * 1979-11-14 1986-06-05 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Magnetischer Stellungsgeber für hydrauliche oder pneumatische Arbeitszylinder
DE3403830A1 (de) * 1983-04-12 1984-10-18 Knorr-Bremse GmbH, 8000 München Fluidgetriebener kolbenstangenloser arbeitszylinder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1897277U (de) * 1963-10-22 1964-07-23 Festo Maschf Stoll G Fuer den betrieb mit einem pneumatischen druckmedium bestimmter arbeitszylinder.

Also Published As

Publication number Publication date
DE3317113A1 (de) 1984-11-15
EP0181415A1 (fr) 1986-05-21

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