WO2001069090A1 - Fluidbetätigter linearantrieb - Google Patents
Fluidbetätigter linearantrieb Download PDFInfo
- Publication number
- WO2001069090A1 WO2001069090A1 PCT/EP2001/002660 EP0102660W WO0169090A1 WO 2001069090 A1 WO2001069090 A1 WO 2001069090A1 EP 0102660 W EP0102660 W EP 0102660W WO 0169090 A1 WO0169090 A1 WO 0169090A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- receiving space
- linear drive
- valve
- electronics
- drive according
- 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.)
- Ceased
Links
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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
-
- 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
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- 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
- F15B15/202—Externally-operated valves mounted in or on the actuator
-
- 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
- F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
Definitions
- the invention relates to a fluid-actuated linear drive, the housing of which contains a piston which can be displaced by the application of fluid and an electrically activatable control valve device which serves to control the application of fluid.
- a linear drive of this type known from EP 0 713 980 A2 contains centrally a piston receiving space which extends in the longitudinal direction and in which a piston connected to a piston rod is displaceably arranged.
- pressure medium can be fed in in a controlled manner, for which purpose there is a control valve device which contains a plurality of control valves inserted into the end cover of the housing of the linear drive in the manner of a cartridge.
- the control valves are activated by means of valve control electronics, which are also fixed to the housing.
- the known linear drive already offers a high degree of integration of the functionally relevant components, but is less suitable for realizing miniaturized sizes. It is therefore the object of the present invention to create a linear drive on the basis of which more compact dimensions can be achieved while maintaining an integrated solution.
- This object is achieved by a fluid-actuated linear drive, with a flat housing having an elongated cross-sectional contour, in which there are several receiving spaces lying next to one another in the direction of the cross-sectional longitudinal axis in a common housing plane, with a longitudinally extending one in the area of a first of the two narrow sides of the housing and a piston-containing space connected to a piston which is guided to the outside, and an electronics-containing space containing a valve control electronics is provided in the region of the opposite second housing narrow side, and at least one for the piston-receiving space and the electronics-receiving space Control of the fluid loading of the piston serving, electrically actuated control valve device containing valve receiving space.
- the linear drive thus has an extremely flat housing, which can be designated as a flat housing, in which receiving spaces serving to hold function-relevant components are arranged alongside one another in such a way that they lie in a common plane that coincides with the longitudinal cross-sectional axis of the flat housing, whereby available volume of the flat housing is optimally used.
- the piston receiving space is assigned to one of the narrow sides of the housing, so that a relatively small wall thickness is established on three sides, which enables reliable sensor interrogation of the piston position if required.
- An electronics receiving space is assigned to the opposite housing narrow side, which contains the valve control electronics, which can generate the switching signals necessary for the actuation of the control valve device.
- the control valve device sits in the direction of the cross-sectional longitudinal axis of the flat housing between the piston receiving space and the electronics receiving space, so that on the one hand there are short electrical signal paths to the valve control electronics and on the other hand, set short fluid paths to the piston receiving space.
- the linear drive including its various components, is very easy to install, and combined with a very compact design results in an extremely robust overall unit that is also suitable for miniaturized applications.
- valve control electronics is expediently provided on a circuit board-like electronics carrier, which is used in particular in the electronics receptacle in such a way that its plate plane is at right angles to the cross-sectional longitudinal axis of the flat housing, so that compact dimensions can also be maintained in the longitudinal cross-sectional direction.
- a uniform control receiving space is expediently provided, which is subdivided into sections which on the one hand represent the valve receiving space and on the other hand the electronic receiving space.
- a sensor receiving space can be provided in the interior of the housing, which contains a position detection device used to detect the piston position.
- This expediently has one or more sensors which can be variably adjusted in the longitudinal direction of the sensor receiving space and which are in electrical connection with the valve control electronics. It is particularly advantageous to equip the position detection device with a printed circuit board which extends in the longitudinal direction of the sensor receiving space and which is used to transmit position detection signals. tion signals from and / or to sensors, which can be arranged on the printed circuit board in a longitudinally adjustable manner.
- a design with two separate control valve units, each with a 3/2-switching function, is particularly recommended, and each for the fluid application of the piston in one of the two possible directions of movement are responsible.
- These two control valve units are preferably housed one behind the other in the longitudinal direction of the flat housing in a common valve receiving space, it being possible for at least the valve control signals belonging to a control valve unit to also be transmitted via the position detection device, so that these are transmitted with respect to the transmission electrical signals can perform a dual function.
- the flat housing of the linear drive expediently contains a housing main body, in which the various receiving spaces are formed continuously from one axial end to the other, with the housing main body being designed as an extrusion part or extruded part. Attached cover-like covers can take over the end of the housing main body, which at the same time can also fill the holding function for the control valve device.
- a circuit board can be interposed between a respective cover and the main body of the housing, which can be used for signal transmission between the position detection device and the valve control electronics and / or the control valve units.
- the printed circuit board can be provided with sealing means which ensure a fluid-tight connection between the cover and the main housing body and which, if necessary, can at least partially take over the function of light guide means in order to make generated light signals visible from the outside.
- the Light signals can indicate, for example, the activation state of the control valve device and / or the piston position.
- the linear drive is particularly suitable for being equipped with a control valve device, the valves of which are at least partially formed by micromechanically manufactured micro valves, but it would also be possible to use piezo valves.
- both the fluidic and the electrical connections of the linear drive are combined on a common end face of the flat housing, which is expediently the rear face, which is opposite the front face penetrated by a piston rod.
- FIG. 1 shows a preferred design of the fluid-actuated linear drive according to the invention in an oblique view and with a partially longitudinally sectioned flat housing, the section line being indicated in FIG. 3 at I-I,
- FIG. 2 shows the linear drive from FIG. 1 from a somewhat changed perspective and with the cover shown removed on the rear, and
- FIG 3 shows the linear drive from FIGS. 1 and 2 in a perspective illustration in cross section according to section line III-III from FIGS. 1 and 2.
- the linear drive 1 has an elongated housing, which due to its flat shape is referred to as a flat housing 2.
- this flat housing 2 has an elongated cross section with a preferably rectangular contour, the longitudinal cross section axis being designated by reference number 3. The latter runs at right angles to the longitudinal axis of the flat housing 2, designated by reference number 4.
- the flat housing 2 contains a housing main body 5 which defines the major part of the overall length and two front and rear cover-like covers 6a, 6b attached to its axially oriented end faces. All of these parts have the aforementioned oblong-rectangular cross-sectional shape.
- a total of four receiving spaces 8, each running parallel to the longitudinal axis 4 of the housing, are provided inside the flat housing 2 and lie alongside one another in the direction of the longitudinal cross-sectional axis 3, wherein they extend in a common housing plane which extends through the longitudinal cross-sectional axis 3 and the longitudinal axis of the housing.
- axis 4 is spanned. The latter is also the sectional plane of the representations in FIGS. 1 and 2, in which the main housing body 5 is shown in longitudinal section.
- the receiving spaces 8 run parallel to one another and each extend through the housing main body 5 over its entire length. It is therefore advisable to design the main housing body 5 as an extruded aluminum part.
- a piston receiving space 12 which contains a piston 13 which can be displaced in the longitudinal direction and which axially divides the piston receiving space 12 into a front and a rear working space 14a, 14b with sealing.
- the piston 13 is coaxial with a piston rod 16, which is sealed and longitudinally displaceable through the front cover 6a is guided to the outside and forms a force tapping part, on the outside of which a force or movement can be tapped.
- the outer end portion of the piston rod 16 can be connected to any device to be moved.
- a separate first fluid channel 17a, 17b opens into each working space 14a, 14b, through which a fluid pressure medium, in particular compressed air, can optionally be fed or discharged, around the piston 13 and the piston rod 16 in a forward or backward linear movement to drive parallel to the longitudinal axis 4 of the housing.
- a fluid pressure medium in particular compressed air
- the piston receiving space 12 is located in the region of a first housing narrow side 21.
- the oppositely oriented second housing narrow side 22 is assigned a receiving space 8 designed as an electronics receiving space 23, which contains valve control electronics 24. This is used to electrically control a control valve device 25, which is accommodated in a receiving space 8, which is located between the piston receiving space 12 and the electronic receiving space 23 and which is referred to as the valve receiving space 26.
- the remaining fourth receiving space 8 is referred to as the sensor receiving space 27 and is located on the longitudinal side of the piston receiving space 12 opposite the valve receiving space 26 between the latter and the adjacent first narrow-side outer surface section 31 of the main body of the housing 5.
- Receiving space 27 contains a position detection device 32, which in the exemplary embodiment is designed to detect certain predetermined axial positions of the piston 13. However, it would also be possible to design it as a position measuring system with which every current piston position can be determined.
- the valve control electronics 24 occupies only a partial length of the electronics receiving space 23, in which it rear end portion is housed. It is connected by means of dash-dotted first electrical conductors 33 to the electrical connection means 34 provided on the rear cover 6b and accessible from the outside, which are preferably designed as plug-in means and enable an electrical connection to an external control device (not shown).
- the valve control electronics 24 are preferably provided on a plate-like electronics carrier 35, for example on a printed circuit board which is inserted from the rear into the electronics receptacle 23 and is fixed there by suitable fastening means 36.
- the alignment is in particular such that the plate plane of the electronics carrier 35 runs at right angles to the cross-sectional longitudinal axis 3, in other words the width direction of the electronics carrier 35 is aligned parallel to the cross-sectional transverse axis 37 of the flat housing 2. In this way, the dimensions of the flat housing 2 in the cross-sectional longitudinal axis 3 coinciding with the thickness direction of the electronics carrier 35 are kept very small.
- control valve device 35 receives the necessary electrical actuation signals through the intermediary of the valve control electronics 24 and in coordination with the external control device in order to bring about the fluid loading of the piston 13 in the desired manner. It can be provided that the valve control electronics 24 generate the switching signals for the control valve device 25 from a received switching signal or bus signal.
- the microprocessor required for the bus protocol can be used by means of corresponding logic links for specifying the switching states of the control valve device. If 25 types of valve are used in the control valve device, which differ from the voltage normally fed in
- valve control electronics can require voltage - for example in the case of so-called micro valves or piezo valves 24 also contain the corresponding means for voltage conversion.
- valve control electronics 24 can have their own, preferably variably programmable control program, but this is not necessarily necessary.
- the control signals can also be supplied solely by the external control device, the valve control electronics 24 having suitable communication means in order to be able to distribute the incoming and possibly also outgoing control signals in the direction of assignment.
- control valve device 25 is divided into two control valve units 38a, 38b, each of which preferably contains the functionality of a 3/2-way valve. These can be 3/2 switching valves directly, or, for example, links between two 2/2 valves, if necessary supplemented by an amplifier, which is particularly advantageous if the control valve units 38a, 38b are so-called valve technology Micro valves are built. Micro valves are generally manufactured using suitable micromechanical structuring methods and enable very small sizes, which also applies to piezo valves.
- the two control valve units 38a, 38b are accommodated one behind the other in the valve receiving space 26 in the longitudinal direction 4 of the flat housing 2. Due to their short overall length, they are axially separated from each other by a space.
- the control valve units 38a, 38b expediently sit in the front or rear end section of the valve receiving space 26, into which they are inserted from the respective end face.
- each control valve unit 38a, 38b is fixed to the associated front or rear cover 6a, 6b, with the cross-sectional contour of the valve Receiving space 26 a transverse support can take place in the interior of the flat housing 2.
- each control valve unit 38a, 38b is assigned a printed circuit board 42a, 42b which is equipped with electrical conductors and / or electrical or electronic components and which the respective control valve unit 38a, 38b flanked on the long side assigned to the electronics receiving space 23 and in the process electrically contacted with the respectively assigned control valve unit.
- These printed circuit boards 42a, 42b whose length expediently corresponds approximately to that of the associated control valve unit 38a, 38b, expediently run parallel to the electronics carrier 35 and thus also at right angles to the longitudinal cross-sectional axis 3.
- the printed circuit board 42b located on the rear control valve unit 38b projects Electrical contact means 43 in direct connection with the directly adjacent valve control electronics 24.
- the front circuit board 42a assigned to the front control valve unit 38a is also electrically linked to the valve control electronics 24 via second electrical conductors 44.
- valve receiving space 26 and the electronic receiving space 23 are designed as merging room sections of a common receiving space, which is used as a control tion-receiving space 45, which can be seen particularly well from FIG.
- control receiving space 45 which is somewhat enlarged in cross section and which, as a unit, represents both the valve receiving space 26 and the electronics receiving space 23.
- the position detection device 32 accommodated in the sensor receiving space 27 has a printed circuit board 45 which extends over the entire length of the sensor receiving space and on which at least one sensor 46, shown in broken lines in FIG. 1, is arranged such that it has first signal conductors 47 on the printed circuit board 45 is in electrical connection.
- the senor 46 is expediently held on a slide body 48 which completely or partially encompasses the circuit board 45 in such a way that it is held on the circuit board 45 and at the same time is displaceably guided in the longitudinal direction of the circuit board 45 and thus parallel to the longitudinal axis 4 of the housing.
- a guide on the flat housing 2 is unnecessary.
- the electrical contact between the sensor 46 and the first signal conductors 47 is designed such that it is independent of the instantaneous longitudinal position of the slide body 48 and the sensor 46 arranged thereon.
- An actuating element 49 for example a permanent magnet, which is connected to the piston 13 or the piston rod 16 and is movable, is able to activate the sensor 46, which is formed by a so-called reed switch, for example, when it moves radially into a sensor 46 that is opposite the sensor 46 Position reached.
- the magnetic field of the actuating element 49 can penetrate the thin intermediate wall 52 of the flat housing 2 that separates the piston receiving space 12 from the sensor receiving space 27. If the sensor is activated, the corresponding position detection signals are transmitted via the first signal conductors 47 to the valve control electronics 24.
- third electrical conductors 53 which are provided on a rear printed circuit board 54b and which is interposed axially between the rear end face of the housing main body 5 and the rear cover 6b attached thereto.
- Electrical contact means pairs 55 which cooperate with one another and are preferably designed as plug connectors ensure the electrical contacting of the rear printed circuit board 54b with the printed circuit board 45 of the position detection device 32 on the one hand and with the valve control electronics 24 or the printed circuit board 42b of the rear control valve unit 38b electrically coupled thereto.
- a plurality of sensors can also be variably adjusted and positioned in any desired manner in the longitudinal direction on the printed circuit board 45, which are connected in a comparable manner to the valve control electronics 24.
- the longitudinal slot 56 thus opens inside the sensor receiving space 27 and outside to the first narrow-side outer surface section 31. Through it, access to the slide body 48 or sensor 46 is possible for the purpose of axial adjustment.
- the longitudinal slot 56 is normally closed by a slot cover 58.
- this is detachably inserted into the longitudinal slot 56 and can be removed briefly to adjust the sensor 46.
- The is preferred Slot cover 58 formed by an elastomer part that can be easily adapted to the desired slot length.
- a particular advantage of the linear drive 1 according to the example is that the position detection device 32 has a multiple function and is also used to transmit valve control signals from the valve control electronics 42 to the front control valve unit 38a arranged on the front cover 6a.
- second signal conductors 59 provided on the circuit board 45 of the position detection device 32 are used as components of the above-mentioned second electrical conductors 44 in order to establish the electrical connection.
- this is solved in the exemplary embodiment in such a way that also between the front
- a circuit board referred to as a front circuit board 54a is interposed, which, like the rear circuit board 54b, produces an electrical connection between the front control valve unit 28a and the circuit board 45 of the position detection device 32.
- the further signal routing to the valve control electronics 24 then takes place via the third electrical conductors 53 already mentioned.
- the front and rear printed circuit boards 54a, 54b also serve as seal carriers and are equipped with sealing means 63, which ensure a tight connection between the housing main body 5 and the attached front and rear covers 6a, 6b.
- the sealing means 63 can at least partially be designed as light-guiding means, which ensure that light-emitting signals generated by the lighting means provided on the printed circuit boards 54a, 54b are directed to the peripheral region of the flat housing 2 and are thus visible to an external viewer. In this way, any position, function and status displays can be easily implemented.
- Both the front and the rear printed circuit boards 54a, 54b can be used, if necessary, for the integration of further electronic parts for, for example, the valve control or the sensors.
- the exemplary embodiment provides that, apart from the electrical ones, there is a common end face of the flat housing 2, in this case on the rearward facing end face of the rear cover 6b Connection means 34 and fluid connection means 64 for feeding and / or discharging fluid energy are also provided.
- the fluidic connection means 64 communicate with fluid channels 65 running in the interior of the flat housing 2, which lead to the two control valve units 38a, 38b in order to feed or vent compressed air.
- the control valve units 38a, 38b link the further fluid channels 65 with the already mentioned first fluid channels 17a, 17b depending on the switching position in order to produce the desired piston movement.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Actuator (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Fluid-Driven Valves (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP01925408A EP1266145B1 (de) | 2000-03-17 | 2001-03-09 | Fluidbetätigter linearantrieb |
| DE50102270T DE50102270D1 (de) | 2000-03-17 | 2001-03-09 | Fluidbetätigter linearantrieb |
| US10/221,539 US6786127B2 (en) | 2000-03-17 | 2001-03-09 | Fluid-actuated linear drive |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20004976U DE20004976U1 (de) | 2000-03-17 | 2000-03-17 | Fluidbetätigter Linearantrieb |
| DE20004976.3 | 2000-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001069090A1 true WO2001069090A1 (de) | 2001-09-20 |
Family
ID=7938930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2001/002660 Ceased WO2001069090A1 (de) | 2000-03-17 | 2001-03-09 | Fluidbetätigter linearantrieb |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6786127B2 (de) |
| EP (1) | EP1266145B1 (de) |
| DE (2) | DE20004976U1 (de) |
| WO (1) | WO2001069090A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10048049A1 (de) * | 2000-09-28 | 2002-05-02 | Festo Ag & Co | Fluidtechnische Einrichtung mit einer Diagnoseeinrichtung |
| DE20301251U1 (de) | 2003-01-28 | 2003-04-03 | FESTO AG & Co., 73734 Esslingen | Fluidbetätigte Linearantriebsvorrichtung mit modularer Steuereinheit |
| DE202005006795U1 (de) * | 2005-04-22 | 2005-07-21 | Festo Ag & Co. | Antriebsvorrichtung mit Stellungsregler |
| DE102007008338B4 (de) * | 2007-02-20 | 2009-12-17 | Festo Ag & Co. Kg | Positionssensoreinrichtung und damit ausgestatteter Aktor |
| US20090072580A1 (en) * | 2007-09-14 | 2009-03-19 | Wojtach Jr Robert S | Integrated valve/cylinder device |
| CA2675497A1 (en) * | 2009-08-18 | 2011-02-18 | Tcb Welding And Construction Ltd. | Switching assembly for a hydraulic pump jack |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3158068A (en) * | 1961-12-28 | 1964-11-24 | Conair | Hydraulic actuator and control unit |
| EP0355179A1 (de) * | 1988-08-18 | 1990-02-28 | Festo KG | Linear-Antriebseinrichtung |
| EP0621408A1 (de) * | 1993-03-19 | 1994-10-26 | Zindel Consulting | Fluidbetätigter Arbeitszylinder mit integrierten Stell- und Steuergliedern |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4150686A (en) * | 1976-11-15 | 1979-04-24 | Textron Inc. | Electrohydraulic control module |
| US4481451A (en) * | 1982-08-20 | 1984-11-06 | Johnson Service Company | Electronically controlled positioner for pneumatic actuators |
| DE3325399C2 (de) | 1983-07-14 | 1985-10-31 | Integral Hydraulik & Co, 4000 Düsseldorf | Hydraulik-Zylinder mit innenliegender Wegumformung |
| WO1993002880A1 (en) * | 1991-08-07 | 1993-02-18 | Microhydraulics, Inc. | Active suspension system |
| DE4438164A1 (de) | 1994-10-26 | 1996-05-02 | Festo Kg | Antriebsvorrichtung |
| DE29518539U1 (de) | 1995-11-22 | 1996-01-18 | Festo Kg, 73734 Esslingen | Positionserfassungsvorrichtung |
| DE29814578U1 (de) | 1998-08-14 | 1998-10-22 | Festo AG & Co, 73734 Esslingen | Linearantrieb |
-
2000
- 2000-03-17 DE DE20004976U patent/DE20004976U1/de not_active Expired - Lifetime
-
2001
- 2001-03-09 EP EP01925408A patent/EP1266145B1/de not_active Expired - Lifetime
- 2001-03-09 US US10/221,539 patent/US6786127B2/en not_active Expired - Fee Related
- 2001-03-09 WO PCT/EP2001/002660 patent/WO2001069090A1/de not_active Ceased
- 2001-03-09 DE DE50102270T patent/DE50102270D1/de not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3158068A (en) * | 1961-12-28 | 1964-11-24 | Conair | Hydraulic actuator and control unit |
| EP0355179A1 (de) * | 1988-08-18 | 1990-02-28 | Festo KG | Linear-Antriebseinrichtung |
| EP0621408A1 (de) * | 1993-03-19 | 1994-10-26 | Zindel Consulting | Fluidbetätigter Arbeitszylinder mit integrierten Stell- und Steuergliedern |
Also Published As
| Publication number | Publication date |
|---|---|
| US20030029309A1 (en) | 2003-02-13 |
| DE50102270D1 (de) | 2004-06-17 |
| US6786127B2 (en) | 2004-09-07 |
| EP1266145B1 (de) | 2004-05-12 |
| EP1266145A1 (de) | 2002-12-18 |
| DE20004976U1 (de) | 2000-05-31 |
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