EP2550461B1 - Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydraulique - Google Patents

Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydraulique Download PDF

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Publication number
EP2550461B1
EP2550461B1 EP11708718.9A EP11708718A EP2550461B1 EP 2550461 B1 EP2550461 B1 EP 2550461B1 EP 11708718 A EP11708718 A EP 11708718A EP 2550461 B1 EP2550461 B1 EP 2550461B1
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EP
European Patent Office
Prior art keywords
switching
pressure
piston
clamping
switching 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.)
Not-in-force
Application number
EP11708718.9A
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German (de)
English (en)
Other versions
EP2550461A1 (fr
Inventor
Winfried RÜB
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.)
Hydac Filtertechnik GmbH
Original Assignee
Hydac Filtertechnik 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 Hydac Filtertechnik GmbH filed Critical Hydac Filtertechnik GmbH
Priority to PL11708718T priority Critical patent/PL2550461T3/pl
Publication of EP2550461A1 publication Critical patent/EP2550461A1/fr
Application granted granted Critical
Publication of EP2550461B1 publication Critical patent/EP2550461B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage valves
    • 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
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Definitions

  • the invention relates to a device for locking an axially displaceable component of a hydraulic system, wherein the axially displaceable component in at least one axial position via a detent with a detent body releasably releasably fixed, and with a notching device for notching the detent body from the axially displaceable component, wherein the detent means of a tensioning piston and using an energy accumulator is latched and released, and wherein the tensioning piston is movable in a loadable by a clamping pressure working space.
  • the DE 39 23 743 A1 discloses a hydraulic directional control valve with a locking device which holds the spool in a working position.
  • the locking device has a Ausklink adopted for the spool of the directional control valve, so that at a possible overpressure or even at a corresponding low pressure of the spool can be returned to its neutral center position.
  • the locking device has for this purpose an overpressure responsive pressure valve with a piston member and a piston with a spring accumulator, which responds to low pressure. Both the piston and the piston member are operatively connected to a cone, which relieves locking balls located in the locking position, so that the spool can be moved to its neutral center position.
  • the EP 1 446 599 B1 again shows a device for locking an axially displaceable component, such as a spool of a hydraulic directional control valve, by means of which the axially movable member in axial positions via a detent is durable.
  • the detent is releasable by means of a notching device for notching detent bodies from the axially displaceable component.
  • the locking positions that allow the detent variably adjustable by changing a position of a Codier stresses. It can thus represent a mechanical coding that allows multiple functional configurations of the directional control valve and thus allows the same various operating conditions.
  • Out DE 41 07 980 A1 is a generic hydraulically actuated locking device for a longitudinally movable part relative to a stationary part by means of a radially movable ball known.
  • the ball is arranged in a transverse bore of a stationary, sleeve-shaped part and is able to penetrate into the detent position in a latching groove on the movable part, in unlocked position in a groove on a radially outer sliding sleeve.
  • the latching device further comprises a pressure medium connection from a pressure medium source to a pressure chamber delimited by the movable part, wherein a part of the pressure medium connection is formed in the movable part itself.
  • the longitudinally movable member is typically a piston which is mechanically locked after a certain sliding travel by the latching means. In this position, the sliding sleeve abuts with its end face at the tube end and the compression spring is fully biased. If the piston is to be extended, pressure medium is introduced into the pressure chamber via a bore under a correspondingly high pressure. About this pressure medium, a pressure builds up, which shifts the sliding sleeve against the force of the compression spring, so that the annular groove can reach into the region of the ball and the piston is unlocked again.
  • a disadvantage of the device could be considered that always takes place on reaching a certain working pressure, the unlatching of the spool.
  • a permanent detenting or a deactivated detenting and an operation performed with such a configuration of the component or a directional control valve is not possible.
  • the present invention seeks to provide a device for locking an axially displaceable component of a hydraulic system, in particular for locking a spool, which does not have the disadvantages mentioned.
  • a particularly advantageous feature of the device characterizing the invention is that the tensioning piston can be adjusted by a switching device at least into a switching position.
  • the switching device ensures on the one hand, that the clamping pressure is guided to the clamping piston and can be wegvul again by the energy storage from its latching position at drop of the clamping pressure in this first, called “kick-out switching position" switching position of the clamping piston.
  • at least two further switching positions can preferably be realized with the switching device, wherein a further second switching position serves to discharge pressure medium from the clamping piston in a pressure medium container, so that the spool can return to a neutral position.
  • a third switching position of the switching device preferably provides for a blocking of the tensioning piston in the respective assumed switching position, in particular in the latching position.
  • the component may be a spool of a hydraulic directional control valve.
  • the switching device is acted upon as a clamping pressure of a load pressure of a consumer, which is preferably controlled by the directional control valve. This results in that no latching function is possible in a working position of a hydraulic working tool when a pressure medium pump is connected. In a restart of the pressure medium pump is thus reliably prevented that the spool of the directional control valve is in a position in which a working connection is directly connected to the pressure medium-promoting pressure medium pump and thus a dangerous, unintentional actuation of a consumer is possible (safety function).
  • a so-called "kick-out" function of the switching device should cancel the locking action when reaching a predetermined load height at the working port of the directional control valve and push the valve slide out of the detent position with the aid of the energy accumulator (kick-out).
  • the switching device can be operated preferably manually and thereby preferably three switching positions or operating modes for the detent can be realized. Since the switching device controls the pressurization of the clamping piston for the detent, a permanent release of the clamping piston can be effected with a second switching position of a valve member of the switching device by the working space is connected to a pressure fluid container for emptying the working space and a connection of the working space of the clamping piston with a Load pressure of a consumer is omitted. This results in a permanent inoperative position of the detent.
  • a blocking of the supply and removal of pressure medium to or from the working space of the tensioning piston can be effected. This results in a blocking position of the clamping piston.
  • the choice of the various switching positions can be done via a rotary switch or switch button, all three switching positions of the valve member of the switching device at half a turn of the switch knob or less are approached.
  • the valve member of the switching device can perform a combined Drehund translational movement, as this is very space-saving about with a control piston feasible.
  • the "kick-out" function is realized, in which the clamping piston for the detent is subjected to a clamping pressure. Left and right of this neutral position can be provided the two other switching positions.
  • this is integrated in a housing of the directional control valve and a longitudinal axis of the control piston is arranged parallel to a longitudinal axis of the valve member of the directional control valve.
  • the inventive device is particularly suitable for an arrangement in hydraulic systems of commercial vehicles, such as so-called. Tractors.
  • Fig.1 is a schematic diagram of a device 1 to a directional control valve 3 for locking a valve member 18 of the directional control valve 3 shown.
  • the valve member 18 is formed as a valve spool and as an axially displaceable component 2 in a conventional manner.
  • the pertinent directional control valve 3 a pressure supply port P for providing a working and pump pressure, a return port R, a section load sensing port LS, two control ports P ' A and P' B and two Nutzan say E, F on.
  • the said fluid connections LS, P ' A , P' B , R, E, F are arranged in a part of a housing 14 of the directional control valve 3.
  • a lower portion of the housing 14 has an annular channel assembly 19, in which a pressure compensator 11 is inserted, which is connected upstream of the directional control valve 3 and this provides the function of a Quiltnabschneidung through the LS-pressure limitation.
  • This can be at a drive a designed as a hydraulic cylinder load 10, which is shown only schematically and should be located at an end stop, to cut off the overload of the pressure medium pump, the flow rate of pressure medium to the hydraulic cylinder.
  • the device 1 for locking the valve member 18 to the housing 14 of the directional control valve 3 is affiliated.
  • the device 1 consists of one, like the Figure 2 ' shows detent 4 with a movable in the same axial direction as the valve member 18 locking piston 20, in the extension of an element 21 is arranged in the manner of a cone bush, the control or inclined surfaces 22 has.
  • the device 1 is arranged in a single housing 29, wherein the housing 29 has a rectangular, formed with rounded corners, massive flange plate 30 with which it can be screwed to a flat end face of the housing 14 of the directional control valve 3 from the left side is.
  • Fig. 7 illustrates in a perspective view that the housing 29 is formed in the manner of a cup with a substantially conically widening to the housing 14 shape, wherein in the housing 29, a cylindrical bore 31 is introduced.
  • the bore 31 has an approximately twice as large diameter D as the diameter of the locking piston 20, which extends through the bore 31 substantially in its entire length.
  • the locking piston 20 is formed as a cylindrical rotary member integral with the valve member 18 of the directional control valve 3 and has a diameter reduction of about 1 ⁇ 4 of the diameter of the valve member 18 in the axial region of the flange plate 30, wherein the diameter in the axial region of the housing 29 with the exception of two locking recesses 24,25 forming grooves 32 is designed to be consistent.
  • the grooves 32 have a part-circular cross-section.
  • the locking piston 20 is mounted at its free end 33 in a guide bushing 34 and lies with its slightly less than half its length reaching collar on the wall formed by the bore 31.
  • the locking piston 20 can penetrate the guide bushing 34 by its free end 33 can engage in a blind hole at the top of the housing 29 depending on its displacement position.
  • the grooves 32 are located in the in the Figure 3 and 4 shown displacement position of the locking piston 20 in the region of the respective end faces 36,36 'of the guide bush 34th
  • latching body 5 can occur in the form of balls.
  • latching body 5 can occur in the form of balls.
  • the inclined surfaces 22 extend approximately 45 ° to a longitudinal axis 17 of the valve member 18 to the guide bush 34, so that the locking body 5 or balls are held in contact with the inclined surfaces 22 on an end face 36 of the guide bush 34.
  • the stop sleeve 35 is acted upon by a cylindrical compression spring 37, which is guided at a radial distance on the locking piston 20, and is supported on the stop sleeve 35 at an end formed by an extension of the inner diameter of the stop sleeve 35 face 38 axially.
  • the compression spring 37 is guided on an inner circumferential surface 39 of the stop sleeve 35.
  • the stop sleeve 35 has an inner contour in the manner of a piston.
  • the compression spring 37 is held in contact with a tensioning piston 7.
  • the clamping piston 7 is arranged axially displaceably in a blind bore 40, which is guided by a stop surface 41 for the flange plate 30.
  • the blind bore 40 has a slightly larger diameter Ds, so that the clamping piston guided therein 7 can reach with its bore 31 facing end face 42 into abutment against the flange plate 30.
  • the compression spring 37 is located in a recess 43 in the clamping piston 7 and is radially guided in this respect.
  • a cylindrical helical compression spring 44 which is a force accumulator 8, arranged, and applies a compressive force on one of the inclined or control surfaces 22 radially outwardly adjacent end face 45 of the stop sleeve 35 , The pressure force is so far directed against the pressure force of the compression spring 37.
  • a working space 27 between a bottom of the blind bore 40 and the back of the clamping piston 7 can be acted upon with a clamping pressure p, in all in the Fig. 1 to 7 shown embodiments, a load pressure P 'of the pressure compensator 11 is.
  • the load pressure p ' is via an in the channel 14 of the directional control valve 3 guided channel 46 is tapped, wherein the channel 46 has only the dimension of a control pressure line.
  • the channel 46 adjoins an end face 47 of a valve member 12 formed as a control piston 15 of a switching device 9.
  • the control piston 15 is aligned with its longitudinal axis 16 parallel to the longitudinal axis 17 of the valve member 18 and has on the one hand, as Figure 3 in a longitudinal section, a through hole 48, which is guided axially by the control piston 15.
  • the through hole 48 is guided off-center. Further, on the outer periphery of the control piston 15 of the through hole 48 opposite a wrench-like milled recess 49 is disposed on the outer periphery of the control piston 15.
  • the control piston 15 is with its end face 47 into abutment with a blunt needle tip 50 of a bearing needle 51 which is inserted in the housing 14 of the directional control valve 3 in the direction of the longitudinal axis 16 of the control piston 15.
  • the control piston 15 is slidably guided substantially in a blind bore 52 which is parallel to the blind bore 40 for the clamping piston 7.
  • the blind bore 52 is guided by the same stop surface 41 of the housing 14 of the directional control valve 3 as the blind bore 40 itself.
  • the diameter of the valve member 12 is reduced, wherein a cylindrical compression spring 28 is pushed, which is supported at its end remote from the control piston 15 on a shaft 53 of a switch knob 13.
  • the shaft 53 is guided in the housing 29 and has at its end facing the compression spring 28 the same outer diameter as the switching piston 15.
  • the diameter of the shaft 53 tapers in a first diameter recess 54 within the housing 29 to the switch knob 13 and again when exiting the housing 29.
  • the shaft 53 extends through the switch knob 13 and is in this with a splined connection 55 (tongue and groove) partly guided.
  • the switch knob 13 is also fixed with a cap nut 56 fixed on a thread of the shaft 53.
  • the switching knob 13 is, as in particular the Figure 7 shows, designed as a double-wing knob that is manually operable.
  • a spring chamber 57 for the compression spring 37 and a spring chamber 58 for the compression spring 28 are connected to a pressure medium tank T in the form of a tank connection (see. Figure 7 ) connected.
  • a pertinent channel 59 extends in the direction of the 2 'to 5 seen in the housing 14 of the directional control valve 3 in a direction parallel to the longitudinal axes 16,17 and above the valve member 18.
  • the channel 59 is diagonal, the flange plate 30 and an adjoining housing portion of the housing 29 arranged transversely and terminates in the spring chamber 57. As the Figure 7 shows, this channel 59 opens at its other end to a milled side surface 60 of the valve housing 29.
  • the clamping piston 7, a position as in the Figure 4 shown occupy and in connection with a corresponding operational switching position of the valve member 18 at a pressurization of a hydraulic load 10 can lead to a latching by incidence of the locking body 5 in one of the two detent recesses 24 and 25.
  • the locking piston 20 and the integrally formed therewith valve member 18 are releasably secured to the stop sleeve 35.
  • the detent body 5 formed as balls abut against the inclined or control surfaces 22 of the stop sleeve 35, which in turn is pressed by the tensioning piston 7 caused by the increased spring bias of the compression spring 37 against the guide bushing 34.
  • the locking piston 20 at reduced spring force of the compression spring 37 and in the direction of the Fig. 2 'and 5 shown positions of the receding clamping piston 7 due to the power storage 8, the helical compression spring 44 and by the valve spring, not shown (other valve spool end) in one, the locking body 5 from the respective detent recess 24,25 releasing and throwing out position (kick-out).
  • all functions of the switching device 9 can be put out of operation (cf. Fig. 5 ).
  • the switching knob 13 is then in a position offset by approximately 90 °.
  • the clamping piston working chamber 27 is then set via the transverse channel 61 and the milled recess 49 to pass to the lower pressure medium tank connection T. This can, for example, in a steady lifting-lowering work with a consumer 10, which is designed as a hydraulic cylinder, be helpful because the valve member switching positions can change constantly.
  • a third switching position of the switching device 9 see.
  • Figure 3 can be set a Treasureverrastung the locking piston 20 by a voltage applied in the clamping piston working chamber 27 clamping pressure p 'is cut off by the pressure compensator 11 after a latching has occurred. This allows a continuous operation of hydraulic motors are made possible.
  • the housing 29 can be unscrewed in a simple manner from the housing 14 of the directional control valve 3 (not shown).
  • a flat gasket 62 can serve as the simplest sealing element for sealing said fluid-carrying connections and spring chambers between the two housings 14 and 29.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Actuator (AREA)
  • Mechanical Control Devices (AREA)

Claims (13)

  1. Dispositif de verrouillage d'un composant (2) coulissant axialement d'une installation hydraulique, le composant (2) coulissant axialement pouvant être fixé de manière amovible par complémentarité de forme dans au moins une position axiale par un encliquetage (4) avec une pièce (5) d'encliquetage et comprenant un dispositif (6) de désencliquetage pour désencliqueter la pièce (5) d'encliquetage respective du composant (2) coulissant axialement, l'encliquetage (4) pouvant être encliqueté et désencliqueté au moyen d'un piston (7) de serrage et en utilisant un accumulateur (8) de force et le piston (7) de serrage pouvant être déplacé dans un espace (27) de travail pouvant être alimenté en une pression de serrage, caractérisé en ce que le piston (7) de serrage est réglable, au moins dans une position de commutation, par un dispositif (9) de commutation, en ce que le piston (7) de serrage peut être alimenté en la pression de serrage au moyen du dispositif (9) de commutation et peut, dans cette position de commutation, être éloigné de sa position d'encliquetage par l'accumulateur (8) de force, si la pression de serrage s'abaisse.
  2. Dispositif suivant la revendication 1, caractérisé en ce que, dans une autre deuxième position de commutation du dispositif (9) de commutation, de l'huile sous pression peut être envoyée par le piston (7) de serrage de l'espace (27) de travail à un récipient (T) de fluide sous pression, de manière à ce que le composant (2) puisse revenir à sa position neutre.
  3. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que, dans une troisième position de commutation du dispositif (9) de commutation, un blocage du piston (7) de serrage dans la position de commutation prise respectivement, notamment dans la position d'encliquetage, peut être effectué.
  4. Dispositif suivant l'une des revendications précédentes, caractérisé en ce que le composant (2) est un tiroir de commande d'un distributeur (3) hydraulique.
  5. Dispositif suivant l'une des revendications précédentes, caractérisé en ce que le dispositif (9) de commutation peut être alimenté en une pression de serrage par une pression (p') de charge d'un utilisateur (10), qui peut être commandée de préférence par le distributeur (3).
  6. Dispositif suivant l'une des revendications 2 à 5, caractérisé en ce que le dispositif (9) de commutation peut être mis manuellement dans au moins deux, de préférence dans au moins trois, positions (A, B, C) de commutation.
  7. Dispositif suivant l'une des revendications précédentes, caractérisé en ce que le dispositif (9) de commutation alimente, dans une position d'encliquetage de l'encliquetage (4), le piston (7) de serrage en une pression de fluide sous pression, qui correspond à la pression (p') de sortie d'une balance (11) manométrique.
  8. Dispositif suivant l'une des revendications 2 à 7, caractérisé en ce que le dispositif (9) de commutation a un élément (12) de vanne, dont au moins deux, de préférence trois, positions (A, B, C) de commutation sont provoquées par un mouvement de rotation et par un mouvement de translation.
  9. Dispositif suivant la revendication 8, caractérisé en ce que le dispositif (9) de commutation a un bouton (13) de commande, qui peut tourner d'environ 180° et par lequel les au moins deux positions (A, B, C) de commutation de l'élément (12) de vanne du dispositif (9) de commutation peuvent être données à l'avance.
  10. Dispositif suivant la revendication 9, caractérisé en ce que le dispositif (9) de commutation a une position neutre de son bouton (13) de commande tournant, dans laquelle le piston (7) de serrage est alimenté en la pression de serrage.
  11. Dispositif suivant l'une des revendications 4 à 10, caractérisé en ce que le dispositif (9) de commutation est intégré à un boîtier (14) du distributeur (13) hydraulique et la pression de serrage est amenée dans le boîtier (14) du distributeur (3) au dispositif (9) de commutation.
  12. Dispositif suivant l'une des revendications 4 à 11, caractérisé en ce que le dispositif (9) de commutation a un élément (12) de vanne, qui est constitué sous la forme d'un piston (15) de commande et dont l'axe (16) longitudinal s'étend parallèlement à un axe (17) longitudinal d'un élément (18) de vanne du distributeur (3) hydraulique.
  13. Dispositif suivant l'une des revendications précédentes, caractérisé en ce que la pression (p') de charge est séparée d'un espace (6) sous pression du piston (7) de serrage par un point d'étranglement.
EP11708718.9A 2010-03-20 2011-03-05 Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydraulique Not-in-force EP2550461B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11708718T PL2550461T3 (pl) 2010-03-20 2011-03-05 Urządzenie do ryglowania przesuwnego osiowo elementu konstrukcyjnego instalacji hydraulicznej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010012158A DE102010012158A1 (de) 2010-03-20 2010-03-20 Vorrichtung zum Verriegeln eines axial verschiebbaren Bauteils einer hydraulischen Anlage
PCT/EP2011/001092 WO2011116877A1 (fr) 2010-03-20 2011-03-05 Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydraulique

Publications (2)

Publication Number Publication Date
EP2550461A1 EP2550461A1 (fr) 2013-01-30
EP2550461B1 true EP2550461B1 (fr) 2015-01-07

Family

ID=44169130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11708718.9A Not-in-force EP2550461B1 (fr) 2010-03-20 2011-03-05 Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydraulique

Country Status (6)

Country Link
US (1) US20120304850A1 (fr)
EP (1) EP2550461B1 (fr)
JP (1) JP2013522739A (fr)
DE (1) DE102010012158A1 (fr)
PL (1) PL2550461T3 (fr)
WO (1) WO2011116877A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106809008B (zh) * 2017-02-15 2018-12-21 苏州萨伯工业设计有限公司 机液混合四挡传动方法
DE102018212114A1 (de) * 2018-07-20 2020-01-23 Robert Bosch Gmbh Wegeventil mit Rastung, Kick-Out und Neutralstartsicherung

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2393962A (en) * 1943-03-09 1946-02-05 Electrical Inc Fluid actuated lock cylinder
US2768610A (en) * 1953-11-12 1956-10-30 Mead Specialties Company Inc Control mechanism for pressure fluid apparatus
US3161400A (en) * 1963-05-14 1964-12-15 Audco Ltd Fluid control valve
US3402642A (en) * 1965-10-23 1968-09-24 Huck Mfg Co Reciprocating valve and piston
US3790125A (en) * 1972-10-31 1974-02-05 Fluid Controls Inc Control valve with power accumulating, snap action, spool drive
US3941141A (en) * 1974-05-03 1976-03-02 Robert Eddie L Blowout preventer locking apparatus and method
US3972398A (en) * 1975-04-17 1976-08-03 Caterpillar Tractor Co. Parking brake and transmission valve interlock
US4083382A (en) * 1976-06-03 1978-04-11 J. I. Case Company Regulating valve with hydraulic detent
US4309022A (en) * 1980-04-14 1982-01-05 Consolidated Controls Corporation Poppet valve actuator apparatus
US4716933A (en) * 1986-10-16 1988-01-05 J. I. Case Company Valve unit
DE3923743A1 (de) 1989-07-18 1991-01-24 Bosch Gmbh Robert Hydraulisches wegeventil mit verriegelungseinrichtung
DE4107980A1 (de) * 1991-03-13 1992-09-17 Bosch Gmbh Robert Hydraulisch betaetigte rasteinrichtung
DE10157030A1 (de) 2001-11-21 2003-05-28 Bosch Gmbh Robert Vorrichtung zum Verriegeln eines längsbeweglich geführten Bauteiles
DE102008022509A1 (de) * 2008-05-07 2009-11-12 Robert Bosch Gmbh Wegeventil mit einer Rastvorrichtung

Also Published As

Publication number Publication date
US20120304850A1 (en) 2012-12-06
WO2011116877A1 (fr) 2011-09-29
EP2550461A1 (fr) 2013-01-30
DE102010012158A1 (de) 2011-09-22
JP2013522739A (ja) 2013-06-13
PL2550461T3 (pl) 2015-05-29

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