[go: up one dir, main page]

EP0310134B1 - Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile - Google Patents

Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile Download PDF

Info

Publication number
EP0310134B1
EP0310134B1 EP88116284A EP88116284A EP0310134B1 EP 0310134 B1 EP0310134 B1 EP 0310134B1 EP 88116284 A EP88116284 A EP 88116284A EP 88116284 A EP88116284 A EP 88116284A EP 0310134 B1 EP0310134 B1 EP 0310134B1
Authority
EP
European Patent Office
Prior art keywords
control
pressure
valve
switch
delay
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 - Lifetime
Application number
EP88116284A
Other languages
German (de)
English (en)
Other versions
EP0310134A2 (fr
EP0310134A3 (en
Inventor
Heribert Dipl.-Landw. Adams
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT88116284T priority Critical patent/ATE79664T1/de
Publication of EP0310134A2 publication Critical patent/EP0310134A2/fr
Publication of EP0310134A3 publication Critical patent/EP0310134A3/de
Application granted granted Critical
Publication of EP0310134B1 publication Critical patent/EP0310134B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30585—Assemblies of multiple valves having a single valve for multiple output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3138—Directional control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/322—Directional control characterised by the type of actuation mechanically actuated by biasing means, e.g. spring-actuated
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/355—Pilot pressure control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Definitions

  • the invention relates to a hydraulic control device for the working hydraulics of a vehicle which can be used in particular in agriculture and construction, preferably for a constant current system, with at least one control slide which can be fixed by a spring-loaded catch which can be hydraulically disengaged from the pressure in a control line and which, after being released, is automatically activated by a restoring force can be reset to its neutral position, the unlocking of the control spool can be triggered each time a predeterminable operating pressure is reached when the consumer, which is acted upon by the control spool, is switched on and is delayed by means of a delay device in the control line, which in turn is used to apply control pressure via a preload valve to the pump pressure line in Flow direction is connected before the spool.
  • each of the catches engaging on the control valves is designed as part of a piston guided in a cylinder, which is operated by spring force in the blocking direction and by pressure fluid in the Unlocking sense is applied.
  • the hydraulic spaces of the catches are connected to one another by a control line, which is connected directly to the pump pressure line via a hydraulic delay device for supplying hydraulic fluid.
  • the delay device consists exclusively of hydraulic components, which, however, at least partially require special manufacture due to their mode of operation. A device made of such components is quite expensive.
  • the invention has for its object to provide a delay device for a hydraulic control device of the type outlined at the outset, which can be produced inexpensively without custom-made components using commercially available simple means.
  • control line for the detent behind the bias valve to a pressure cell for actuating an electrical switch and parallel to it via a throttle and a check valve parallel to the detent an electromagnetically or spring-actuated two-way valve is connected, which is in the open position connects the control line with the line leading from the control slide to a further downstream control unit and that the switch of the pressure cell forms an electrical circuit with the electromagnetic actuator of the two-way valve in connection with a current source, which can be switched with a delay by a delay relay.
  • the electromagnetic two-way valve is loaded in the closing direction by a spring and that the switch of the pressure cell is in its open position in the closed position and comes into the open position when the pressure in the pressure cell rises.
  • the electromagnetic two-way valve is loaded by a spring in the opening direction and that the switch of the pressure cell is in its open state in the open position and comes into the closed position when the pressure in the pressure cell rises.
  • the circuit formed from the electromagnetic actuator of the two-way valve, the switch of the pressure cell and the relay can be connected to the positive pole of a power source via a switch arranged in the ignition lock of the vehicle.
  • a control slide 1 designed as a multi-way valve is provided, which is used to actuate, for example, an actuating cylinder, not shown.
  • This hydraulic consumer is connected to lines 2, 3.
  • Springs 4 and 5 acting on both sides of the control slide 1 ensure the centering of the movable slide part in the neutral position shown.
  • the control slide 1 has a detent 6 which is effective in a plurality of switching positions and can be mechanically engaged by spring force and hydraulically disengaged.
  • the catch 6 has a plunger 8 which is loaded by the force of a spring 7 and which, depending on the switching position of the control slide 1, engages in one of a plurality of recesses 9 in a slide part 10.
  • the detent 6 For the hydraulic actuation of the detent 6, it has a hydraulic actuator 11 which acts against the force of the spring 7 and which is coupled to a two-way valve 12.
  • a control line 14 provided for supplying the detent 6 with pressure fluid is connected to the actuator 11 by a line 15 and to the two-way valve 12 by a line 16 branching off the line 15.
  • the line 16 In the open position of the two-way valve 12 shown, caused by the spring 7, the line 16 is connected to the collecting container 19 for pressure fluid by a throttle 17 arranged in the spool of the two-way valve 12 by a line 18 connected to the outlet side thereof.
  • the control slide 1 has on the output side through a line 27 a connection to the line 18, which in turn is connected via a line 28 to the collecting container 19.
  • a biasing valve 29 is used to supply the control line 14 with pressure fluid, which is connected on the inlet side to the pressure line 22 and on the outlet side by a line 30 to a pressure cell 31.
  • the control line 14 is connected to the line 30 by switching on a throttle 32 and a check valve 33.
  • the hydraulic system has an electrical delay device 35 for the hydraulic actuation of the catch 6.
  • the delay device 35 has a two-way valve 37, which is acted upon by the force of a spring 36 in the closing direction and is actuated in the opening direction by an electromagnetic actuator 38.
  • the two-way valve 3 is connected on the input side to the control line 14 and on the output side through a line 39 to the line 23 leading from the control slide 1 to the control unit 24.
  • a switch 40 actuated by the latter, which is closed when the pressure cell 31 is unloaded and is connected on the one hand via ground to the negative pole of a power source and on the other hand via a line 41 to the electromagnetic actuator 38 of the two-way valve 37.
  • the actuator 38 is also by a Line 42 and a fuse 43 are connected to the positive pole of a power source via a switch 44 operating in the ignition lock of the vehicle.
  • a relay 45 is used as the delay element, which is connected to the negative pole of the current source with a connection 46 via ground. There are also connections of the delay relay 45 through a line 47 to line 42 and by a line 48 to line 41.
  • the switch 44 When starting the engine of the vehicle, the switch 44 is actuated in the closing direction, so that a circuit is closed by the line 42, the actuator 38, line 41 and the switch 40 in the closed position. As a result, the two-way valve 37 comes into the open position, so that the lines 14 and 39 come into connection with one another.
  • the hydraulic pump 20, which is constantly driven by the internal combustion engine, conveys hydraulic fluid through the pressure line 22 to the hydraulic system, so that when the control spool 1 is in neutral position, a circulating pressure is built up by the control unit 24 arranged at the end of the line 23, which pressure is then present in all lines connected directly to it.
  • control slide 1 If the control slide 1 is now shifted from the neutral position shown into an adjacent working position, then the consumer connected to the lines 2, 3 is pressurized with hydraulic fluid, while at the same time the inflow of hydraulic fluid to the line 23 or to the control unit 24 is interrupted. The line 23 is therefore depressurized. If the control slide 1 reaches the desired working position during its displacement, then the plunger 8 of the catch 6 engages in the corresponding recess 9 on the slide part 10 by the force of the spring 7. When supplying the control valve connected to spool 1 Consumer, for example an actuating cylinder, the pressure in line 22 increases when the piston is in the final position in the actuating cylinder, so that finally, at a predetermined pressure, the preload valve 29 connected to line 22 opens and releases pressure fluid into control line 30.
  • the control valve connected to spool 1 Consumer for example an actuating cylinder
  • a pressure is built up in the control line 30 so that hydraulic fluid passes through the throttle 32 and the check valve 33 into the control line 14.
  • No significant pressure can initially build up in the control line 14, since pressure fluid can continuously flow from the control line 14 through the open two-way valve 37 to line 23 and through lines 15, 16 and the throttle 17 in the two-way valve 16 to the return.
  • the switch 40 Due to the pressure increase in the control line 30, the switch 40 is opened via the pressure cell 31, so that the circuit closed via this is interrupted.
  • the delay relay 45 keeps the circuit closed for a time via the electromagnetic actuator 38, so that the two-way valve 37 initially remains in the open position.
  • the pressure reduction leads to the closing of the switch 40 via the pressure cell 31, so that the two-way valve 37 opens and releases the direct routes from the control line 14 to the lines 39 and 23 which are pressurized with circulating pressure.
  • the hydraulic system is thus in the starting position again and a new switching operation can take place on the control slide 1.
  • FIG. 2 shows a delay device 50, the structure of which essentially corresponds to that of the delay device 35 in FIG. 1.
  • the delay device 50 uses a delay relay 51 which closes a circuit with a delay when its excitation current is switched on.
  • a two-way valve 52 is provided, which is actuated by the force of a spring 53 in the opening direction and by an electromagnetic actuator 54 in the closing direction.
  • On the pressure cell 55 of this device there is a switch 56 which is in the initial position, i.e. with the pressurized can 55 in the open position.
  • the operation of this delay device 50 is such that the switch 56 closes at a certain pressure in the pressure cell 55, so that the delay relay 51 moves the two-way valve 52 with a delay against the force of the spring 53 in the closing direction against the force of the spring 53.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Vehicle Body Suspensions (AREA)

Claims (4)

  1. Dispositif de commande hydraulique pour l'hydraulique fonctionnelle d'un véhicule utilisable notamment dans l'agriculture et la construction civile, de préférence pour un système à courant constant, avec au moins un tiroir de commande (1) susceptible d'être fixé par un enclenchement (6), sollicité par un ressort et susceptible d'être désenclenché hydrauliquement par la pression dans une conduite de commande (14, 30), cependant que le tiroir (1) après ce désenclenchement est susceptible d'être ramené automatiquement dans sa position neutre par une force de rappel (ressorts 4, 5), tandis que le désenclenchement du tiroir de commande (1) est susceptible d'être déclenché chaque fois qu'est atteinte une pression de fonctionnement prédéfinie lors de la mise en circuit d'un dispositif utilisateur alimenté par l'intermédiaire de ce tiroir de commande (1) (canalisations 2, 3) et est mis en oeuvre en étant retardé par un dispositif de temporisation (35 ou bien 50) sur la canalisation de commande (14, 30) qui, de son côté, pour l'alimentation avec la pression de commande, est reliée par l'intermédiaire d'une soupape de précontrainte (29) à la canalisation de refoulement (22) de la pompe en amont du tiroir de commande (1), dispositif de commande caractérisé en ce que la canalisation de commande (14, 30) pour l'enclenchement (6) est raccordée derrière la soupape de précontrainte (29) à une capsule manométrique (31) pour l'actionnement d'un commutateur électrique (46 ou bien 56) et est raccordée parallèlement à cela par l'intermédiaire d'un étranglement (32) ainsi que d'une soupape de retenue (33) en parallèle à l'enclenchement (6) à une vanne à deux voies (37 ou bien 52) susceptible d'être actionnée électromagnétiquement ou bien par l'action d'un ressort, et qui, dans sa position d'ouverture, relie la canalisation de commande (14, 30) à la canalisation (23) allant du tiroir de commande (1) à un autre appareil de commande branché à la suite, et en ce que le commutateur (46 ou bien 56) de la capsule manométrique (31 ou bien 55) constitue avec l'organe de commande électromagnétique (38 ou bien 54) de la vanne à deux voies (37 ou bien 52) en combinaison avec une source de courant, un circuit électrique de commutation qui est susceptible d'être commuté avec retard par un relais de temporisation (45 ou bien 56).
  2. Dispositif de commande selon la revendication 1, dans lequel le relais (45) est réalisé de façon qu'il interrompt un circuit de courant lors de la coupure de son courant d'excitation, caractérisé en ce que la vanne électromagnétique à deux voies (37) est sollicitée dans le sens de la fermeture par un ressort (36) et en ce que le commutateur (40) de la capsule manométrique (31) se trouve dans sa position de fermeture lorsque cette capsule n'est pas sollicitée et qu'il arrive dans sa position d'ouverture lorsque la pression augmente dans la capsule manométrique (31).
  3. Dispositif de commande selon la revendication 1, dans lequel le relais (51) est réalisé de façon que lors de la coupure de son courant d'excitation, il ferme avec retard un circuit de courant, caractérisé en ce que la vanne électromagnétique à deux voies (52) est sollicitée dans le sens de l'ouverture par un ressort (53) et en ce que le commutateur (56) de la capsule manométrique (55) se trouve dans sa position d'ouverture lorsque cette capsule n'est pas sollicitée et qu'il arrive dans sa position de fermeture lorsque la pression augmente dans la capsule manométrique (55).
  4. Dispositif de commande selon une des précédentes revendications, caractérisé en ce que le circuit de courant constitué par l'organe de commande électromagnétique (38 ou bien 54) de la vanne à deux voies (37 ou bien 52), par le commutateur (46 ou bien 56) de la capsule manométrique (31 ou bien 55) et par le relais (45 ou bien 51) est susceptible d'être relié avec le pôle positif d'une source de courant par l'intermédiaire d'un commutateur (44) disposé dans la serrure de contact du véhicule.
EP88116284A 1987-10-02 1988-10-01 Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile Expired - Lifetime EP0310134B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88116284T ATE79664T1 (de) 1987-10-02 1988-10-01 Hydraulische steuereinrichtung fuer die arbeitshydraulik eines land- und bauwirtschaftlich nutzbaren fahrzeugs.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873733371 DE3733371A1 (de) 1987-10-02 1987-10-02 Hydraulische steuereinrichtung fuer die arbeitshydraulik eines land- und bauwirtschaftlich nutzbaren fahrzeugs
DE3733371 1987-10-02

Publications (3)

Publication Number Publication Date
EP0310134A2 EP0310134A2 (fr) 1989-04-05
EP0310134A3 EP0310134A3 (en) 1990-04-25
EP0310134B1 true EP0310134B1 (fr) 1992-08-19

Family

ID=6337498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116284A Expired - Lifetime EP0310134B1 (fr) 1987-10-02 1988-10-01 Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile

Country Status (3)

Country Link
EP (1) EP0310134B1 (fr)
AT (1) ATE79664T1 (fr)
DE (2) DE3733371A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2440949A (en) 2006-08-15 2008-02-20 Agco Gmbh Spool valve
DE102008042386A1 (de) * 2008-09-26 2010-04-08 Zf Friedrichshafen Ag Arretierungsvorrichtung für einen Ventilschieber
CN101660551B (zh) * 2009-09-25 2011-08-24 中国北方车辆研究所 油气悬挂液压闭锁装置
CN103352889B (zh) * 2013-07-08 2015-07-01 太原理工大学 一种扒渣机液压系统冲击的缓冲方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646968A (en) * 1970-09-30 1972-03-07 Sperry Rand Corp Power transmission valve with detent
US3716075A (en) * 1971-10-12 1973-02-13 Parker Hannifin Corp Power assist mechanism for fluid control valves
US4195551A (en) * 1977-06-23 1980-04-01 Gresen Manufacturing Company Hydraulic control valve including electromagnetic detent
DE3125482A1 (de) * 1981-06-29 1983-01-13 Günter Till Präzisionsmechanik, 3330 Helmstedt "steuerschieber"
DE3203465A1 (de) * 1982-02-03 1983-08-11 Klöckner-Humboldt-Deutz AG, 5000 Köln Druckmittelkreislauf, insbesondere fuer ein maehwerk
DE8311270U1 (de) * 1982-04-16 1983-11-17 Steyr-Daimler-Puch AG, 1011 Wien Vorrichtung zum Betätigen des hydraulischen Kolbentriebes eines Zusatzgerätes, insbesondere für Ackerschlepper
DE3334253A1 (de) * 1983-09-22 1985-04-04 Klöckner-Humboldt-Deutz AG, 5000 Köln Hydraulische steuereinrichtung fuer die arbeitshydraulik von traktoren

Also Published As

Publication number Publication date
EP0310134A2 (fr) 1989-04-05
EP0310134A3 (en) 1990-04-25
ATE79664T1 (de) 1992-09-15
DE3733371A1 (de) 1989-04-13
DE3873868D1 (de) 1992-09-24

Similar Documents

Publication Publication Date Title
EP0972138B1 (fr) Systeme de commande hydraulique
DE102011104530A1 (de) Hydraulische Stellanordnung
DE4212184A1 (de) Hydraulische Steuereinrichtung für einen Arbeitszylinder
EP1630425A2 (fr) Circuit de sécurité pour un utilisateur à actionnement par fluide et méthode pour son utilisation
DE2735559A1 (de) Steuergeraet fuer hydraulische arbeitsgeraete
EP0310134B1 (fr) Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile
DE3420631C2 (fr)
DE2240607B2 (de) Elektrohydraulische Steuereinrichtung
EP3436705B1 (fr) Dispositif de commande
EP0074419B1 (fr) Disjoncteur électrique à haut pouvoir de coupure ayant un dispositif de commande hydraulique
EP0136417B1 (fr) Système de commande hydraulique pour tracteurs
DE2849704C2 (fr)
DE2942552A1 (de) Hydraulischer bremsverstaerker
DE102022101020A1 (de) Hydrauliksystem und Verfahren zum Betreiben eines Hydrauliksystems
DE1930387B2 (de) Vorgesteuertes wegeventil, insbesondere fuer einen doppelwirkenden verbraucher
DE3519148C2 (fr)
DE3222435C2 (fr)
EP0538606A1 (fr) Frein hydraulique pour remorque
DE10016026C2 (de) Hydraulische Leitungskupplungsanordnung
DE2835063A1 (de) Hydraulischer antrieb
DE4418514B4 (de) Elektrohydraulisches Wegeventil
DE102013207298A1 (de) Hydraulische Steuervorrichtung mit Kupplungsbuchse
EP1574720A1 (fr) Commande électro-hydraulique
DE2850056C2 (de) Hydraulische Steuerschaltung für hydraulisch angetriebene Arbeitsmaschinen wie Pressen, Scheren o.dgl.
DE4244516C1 (de) Anfahrüberwachungseinrichtung für eine hydraulisch angetriebene Maschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT DE FR GB IT

17P Request for examination filed

Effective date: 19900428

17Q First examination report despatched

Effective date: 19910521

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KLOECKNER-HUMBOLDT-DEUTZ AG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT

REF Corresponds to:

Ref document number: 79664

Country of ref document: AT

Date of ref document: 19920915

Kind code of ref document: T

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920907

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19920910

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920911

Year of fee payment: 5

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3873868

Country of ref document: DE

Date of ref document: 19920924

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930701

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19931001

Ref country code: AT

Effective date: 19931001

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19931001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051001