EP1178219A1 - Dispositif hydraulique pour le réglage d'une pression de pilotage - Google Patents

Dispositif hydraulique pour le réglage d'une pression de pilotage Download PDF

Info

Publication number
EP1178219A1
EP1178219A1 EP00830561A EP00830561A EP1178219A1 EP 1178219 A1 EP1178219 A1 EP 1178219A1 EP 00830561 A EP00830561 A EP 00830561A EP 00830561 A EP00830561 A EP 00830561A EP 1178219 A1 EP1178219 A1 EP 1178219A1
Authority
EP
European Patent Office
Prior art keywords
piloting
pressure
hydraulic
valve
conduit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00830561A
Other languages
German (de)
English (en)
Other versions
EP1178219B1 (fr
Inventor
Andrea Storci
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.)
Oil Control SpA
Original Assignee
Oil Control SpA
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 Oil Control SpA filed Critical Oil Control SpA
Priority to DE60019743T priority Critical patent/DE60019743T2/de
Priority to AT00830561T priority patent/ATE294332T1/de
Priority to EP00830561A priority patent/EP1178219B1/fr
Publication of EP1178219A1 publication Critical patent/EP1178219A1/fr
Application granted granted Critical
Publication of EP1178219B1 publication Critical patent/EP1178219B1/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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/045—Compensating for variations in viscosity or temperature
    • 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
    • F15B11/003—Systems with load-holding 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid 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
    • F15B2211/30—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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check valve
    • 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
    • F15B2211/40—Flow control
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/413—Flow control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid 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
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out 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
    • F15B2211/40—Flow control
    • F15B2211/47—Flow control in one direction only
    • F15B2211/473—Flow control in one direction only without restriction in the reverse direction
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back 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

Definitions

  • the invention is usefully applied in an actuator hydraulic transmission circuit, for controlling the piloting pressure of an overcentre valve in turn predisposed for controlling a flow rate in a backline of the circuit during a discharge phase.
  • the prior art includes a hydraulic circuit activator in a hydraulic actuator, for example a winch arm cylinder, in which a first circuit branch connects the hydraulic distributor with the actuator chamber associated to load lifting and a second branch connects the distributor with the lowering chamber.
  • the circuit has an overcentre valve predisposed for controlling the flow rate in the first branch during the load descent phase; a pilot line takes a piloting pressure from the second branch which is used to open the overcentre valve during the load descent phase.
  • This type of circuit is prone to instability and oscillation in the overcentre valve on activation of the cylinder or on reversing its direction.
  • the load when the load is lowered, there can be a frequent succession of stops and starts in the actuator before it finally stabilises, causing the load to oscillate dangerously.
  • an adjustable choke on the pilot conduit determines a loss of localised load by effect of which the pilot pressure P PIL which opens the overcentre valve becomes gradual and controlled with respect to the increase in pressure P B in the second branch (i.e. the branch which during the load lowering phase is the delivery branch).
  • the curve S represents the progress of piloting pressure P PIL in relation to the pressure P B in the second branch.
  • a drawback in the above-described prior art solution is the delay in cylinder activation after the operator has selected it. This is especially evident when the liquid operating in the hydraulic circuit is very viscous (for example when cold). This delay is due to the fact that the piloting pressure Ppil reaches value P V , the value at which the overcentre valve opens (which value is predetermined by the valve spring calibration) when cylinder delivery pressure P B has already reached a relatively high P S value (see figure 1). This means that the cylinder actuation during the lowering phase starts when the pressure P B reaches value P S . The time necessary for pressure P B to reach value P S (to which value P V of the piloting pressure Ppil corresponds) can be relatively high, resulting in the above-mentioned delay.
  • the main aim of the present invention is to provide a device for controlling a hydraulic piloting pressure which can overcome the above-described drawback in the prior art, i.e. reduce the delay in response to the hydraulically-piloted organ.
  • An advantage of the invention is that it provides a device for controlling piloting of a hydraulically piloted organ, affording immediate and progressive activation of the organ itself.
  • the activation is immediate inasmuch as the activation of the hydraulically-piloted organ follows the operator's command with a very rapid response time, reducing the delay to a minimum, and is also progressive inasmuch as it proceeds gradually and controlledly subsequent to activation.
  • a further advantage of the present invention is to make available a control device which is particularly useful in a hydraulic activation circuit of a hydraulic actuator for piloting an overcentre valve, being able considerably to reduce the delay in overcentre valve opening and thus prevent occurrence of instability and oscillation phenomena in the valve itself.
  • 1 denotes in its entirety a hydraulic device for controlling a piloting pressure.
  • the device 1 comprises a two-way valve 2 destined to operate on a hydraulic pilot conduit operating on at least one hydraulically piloted organ.
  • the two-way valve 2 has a first line 3 connected to a piloting pressure and a second line 4 connected to the organ which is to be hydraulically piloted.
  • the piloting pressure supplied by the first line 3 of the two-way valve 2, is supplied to the organ to be piloted through the second line 4.
  • the two-way valve 2 can assume an open position in which it enables communication between the first line 3 and the second line 4, and a closed position in which it prevents passage of the operating liquid in the pilot conduit from the first line 3 to the second line 4.
  • the valve 2 is normally open and is predisposed to close by effect of a predetermined pressure on the first line 3.
  • the two-way valve 2 is provided with an obturator, which is a body of revolution, in the illustrated embodiment a sphere, axially mobile inside an internal conduit of the two-way valve 2; the conduit is passed through by the operative liquid of the hydraulic pilot conduit.
  • the obturator 5 is located between a first end of the piston arm 7 and a second elastic element 8 i.e. a helix spring, opposing the first elastic element 6 but having a considerably lower load than the first elastic element 6.
  • a second end of the piston arm 7, opposite to the first end, is in communication with the outside environment, normally at a pressure (for example atmospheric pressure) which is lower than the pressure internally of the valve 2.
  • the obturator 5 closes automatically when the directional thrust of the piston arm 7 due to the internal pressure of the valve 2 overcomes the thrust due to the load of first elastic element 6 acting in the opposite direction.
  • Figure 4 shows a control system for a hydraulic actuator 9 which applies the device 1 of figures 2 and 3.
  • the hydraulic actuator 9 has a first chamber 10 and a second chamber 11 associated respectively to the lifting and lowering of a load.
  • the control system comprises: a hydraulic distributor 13; a hydraulic circuit having a first branch 14 which connects the distributor 13 with the first chamber 10 and a second branch 15 which connects the distributor 13 with the second chamber 11; an overcentre valve 16 for controlling the flow rate into the first branch 14 during the load 12 lowering phase; a piloting conduit 17 which takes from the second branch 15 a piloting pressure which opens the flow-rate control, or overcentre valve 16.
  • the flow-rate control valve is an overcentre valve 16 of known type, having a first connection which is connected to the first chamber 10 and a second connection which is connected to the distributor 13.
  • the overcentre valve has an axially-mobile first obturator which operates between the first and the second connection, which is closed by a spring and opened by a piloting pressure provided through a piloting connection.
  • the overcentre valve comprises a single-acting valve predisposed in parallel with the first obturator to allow flow from the second to the first connection.
  • the first obturator is destined to open by effect of the pressure at the piloting connection.
  • the hydraulic control device 1 of figures 2 and 3 is predisposed on the piloting conduit 17; the first line 3 is connected to the second branch 15, i.e. the delivery branch during the discharge phase, and the second line 4 is connected to the overcentre valve 16 for controlling the flow rate.
  • the pressure P B in the second branch 15 increases, and so does the pressure in the piloting conduit 17. Since the two-way valve 2 is open, the piloting pressure P PIL acting to open the overcentre valve 16 is the same as pressure P B in the second branch 15. The piloting pressure P PIL at the pilot connection of the overcentre valve 16 reaches the predetermined value at which the overcentre valve 16 opens in a relatively short time. This piloting pressure P PIL is limited by the two-way valve 2 which closes the piloting conduit 17 when the pressure P B in the first line 3 exceeds the calibration value of the first elastic element 6 or spring.
  • Figure 5 illustrates a control system for a hydraulic actuator which comprises all of the elements of the system shown in figure 4 (the same elements have the same numbers).
  • the control device 18 comprises, apart from the two-way valve 2, also a choke 19 (or any other device which causes a considerable loss of localised load in the circuit), which is located in parallel with the two-way valve 2 on an auxiliary by-pass conduit 20.
  • the choke 19 can be fixed or adjustable.
  • the first elastic element 6 of the two-way valve 2 is calibrated so that the two-way valve 2 closes when the pressure in the first line 3 has a value P X which is slightly lower than that of value P V of the piloting pressure determining the start of the opening of the overcentre valve 16 for controlling the flow rate (see figure 1).
  • the two-way valve 2 is open and the overcentre valve 16 closed.
  • the pilot connection of the overcentre valve 16 is directly connected, through the piloting conduit 17, to the second branch 15 of the circuit.
  • the piloting pressure P PIL On increasing the pressure P B the piloting pressure P PIL also continues to increase, but at a lower gradient than when the two-way valve 2 was open (see curve T of figure 1). This gradient depends on the fall in pressure caused by the stabilising choke 19 located in the by-pass conduit 20.
  • the piloting pressure reaches a predetermined value P V at which the overcentre valve 16 opens when the pressure P B is at a predetermined value P T .
  • the choke 19 which has the task of stabilising the actuator 9 operation during the load lowering phase, carries out this task effectively even if the passage section of the choke itself is relatively large.
  • the choke 19 of the device of the invention can be decidedly more "open” with respect to a stabilising choke of known type. This is evidenced in figure 1, from, the fact that the gradient of curve S, relative to a choke of known type, is less than the gradient of the second tract (in which P PIL is greater than P X ) of the curve T, relative to the choke used in the device of the invention. It has been seen that this confers on the operator a more direct and immediate degree of control of the actuator. The actuator response is even more immediate to any and every variation in position of the command distributor 13, with a consequent enormous facilitation in the guiding of the actuator 9.
  • the control device 18 operatively associated with the system illustrated in figure 5 enables the overcentre valve 16 to be automatically closed when the pressure P B in the second branch 15 falls.
  • control devices 1 and 18 of the systems illustrated in figures 4 and 5 can be separate from the overcentre valve 16 and arranged on the piloting conduit 17, or can also be incorporated in a single body with the overcentre valve 16.
  • Figure 6 shows a hydraulic distributor 21 with a double pilot, in which each pilot is controlled by a control device 18 as in figure 5.
  • Two piloting conduits 22 and 23 are connected to the distributor 21 and each is also connected to a supply of a piloting pressure.
  • a two-way valve operates on each piloting conduit, the two-way valves are normally open and are closed by effect of the piloting pressure coming from the above-mentioned supply.
  • the distributor 21 is connected to the corresponding supply through the choke 19 on the by-pass conduit 20.
  • the control device can be used for piloting any hydraulically piloted organ, with the aim of obtaining a very rapid activation of the piloted organ in response to an external command supplied through the supply of piloting pressure.
  • the device prevents delays in the activation of the hydraulically-piloted organ and at the same time prevents instability phenomena in the operation of the piloted organ after activation.
EP00830561A 2000-08-04 2000-08-04 Dispositif hydraulique pour le réglage d'une pression de pilotage Expired - Lifetime EP1178219B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE60019743T DE60019743T2 (de) 2000-08-04 2000-08-04 Hydraulische Vorrichtung zum Steuern eines Vorsteuerdrucks
AT00830561T ATE294332T1 (de) 2000-08-04 2000-08-04 Hydraulische vorrichtung zum steuern eines vorsteuerdrucks
EP00830561A EP1178219B1 (fr) 2000-08-04 2000-08-04 Dispositif hydraulique pour le réglage d'une pression de pilotage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00830561A EP1178219B1 (fr) 2000-08-04 2000-08-04 Dispositif hydraulique pour le réglage d'une pression de pilotage

Publications (2)

Publication Number Publication Date
EP1178219A1 true EP1178219A1 (fr) 2002-02-06
EP1178219B1 EP1178219B1 (fr) 2005-04-27

Family

ID=8175441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830561A Expired - Lifetime EP1178219B1 (fr) 2000-08-04 2000-08-04 Dispositif hydraulique pour le réglage d'une pression de pilotage

Country Status (3)

Country Link
EP (1) EP1178219B1 (fr)
AT (1) ATE294332T1 (fr)
DE (1) DE60019743T2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1860009A3 (fr) * 2006-05-23 2010-07-21 Robert Bosch GmbH Soupape pré-commandée
EP2330303A1 (fr) 2009-11-30 2011-06-08 Walvoil S.p.A. Dispositif de contrôle d'un signal de pression pilote
CN102116329A (zh) * 2010-01-05 2011-07-06 耐姆股份公司 利用基本不可压缩流体进行导引的装置
EP2372167A1 (fr) 2010-03-30 2011-10-05 Bosch Rexroth Oil Control S.p.A. Dispositif de contrôle de la pression de pilote, en particulier dans un robinet d'équilibrage
EP2631517A1 (fr) 2012-02-22 2013-08-28 Atlantic Fluid Tech S.r.l. Soupape à maintien de charge
IT201700062799A1 (it) * 2017-06-08 2018-12-08 Vbr S R L Dispositivo di controllo di un cilindro idraulico

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0499694A2 (fr) * 1991-02-21 1992-08-26 HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG Dispositif de commande hydraulique
EP0955472A1 (fr) * 1998-05-07 1999-11-10 HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG Soupape à siège

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0499694A2 (fr) * 1991-02-21 1992-08-26 HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG Dispositif de commande hydraulique
EP0955472A1 (fr) * 1998-05-07 1999-11-10 HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG Soupape à siège

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1860009A3 (fr) * 2006-05-23 2010-07-21 Robert Bosch GmbH Soupape pré-commandée
EP2330303A1 (fr) 2009-11-30 2011-06-08 Walvoil S.p.A. Dispositif de contrôle d'un signal de pression pilote
US8413688B2 (en) 2009-11-30 2013-04-09 Walvoil S.P.A. Device for controlling a pilot pressure signal
CN102116329A (zh) * 2010-01-05 2011-07-06 耐姆股份公司 利用基本不可压缩流体进行导引的装置
EP2341253A1 (fr) 2010-01-05 2011-07-06 Nem S.P.A. Dispositif hydraulique de pilotage
EP2372167A1 (fr) 2010-03-30 2011-10-05 Bosch Rexroth Oil Control S.p.A. Dispositif de contrôle de la pression de pilote, en particulier dans un robinet d'équilibrage
EP2631517A1 (fr) 2012-02-22 2013-08-28 Atlantic Fluid Tech S.r.l. Soupape à maintien de charge
EP2631517B1 (fr) * 2012-02-22 2020-12-09 Atlantic Fluid Tech S.r.l. Soupape à maintien de charge
IT201700062799A1 (it) * 2017-06-08 2018-12-08 Vbr S R L Dispositivo di controllo di un cilindro idraulico

Also Published As

Publication number Publication date
DE60019743T2 (de) 2006-03-02
EP1178219B1 (fr) 2005-04-27
ATE294332T1 (de) 2005-05-15
DE60019743D1 (de) 2005-06-02

Similar Documents

Publication Publication Date Title
US6691510B2 (en) Pipe breakage control valve device
US7818968B2 (en) Hydraulic control device of construction machine
US6334308B1 (en) Pressure compensating valve, unloading pressure control valve and hydraulically operated device
EP2372167B1 (fr) Dispositif de contrôle de la pression de pilote, en particulier dans un robinet d'équilibrage
US9683587B2 (en) Fluid pressure control device
US6241212B1 (en) Hose rupture control valve unit
CN102691683B (zh) 液压控制阀装置
KR20040007595A (ko) 모바일 작동 머신
EP1178219B1 (fr) Dispositif hydraulique pour le réglage d'une pression de pilotage
US20200325915A1 (en) Hydraulic pressure amplifier arrangement
EP1375927B1 (fr) Dispositif de commande hydraulique et engin à travaux avec un dispositif de commande hydraulique
EP2093431B1 (fr) Circuit hydraulique d'une machine de construction
WO1996008652A1 (fr) Unite de commande de capacite d'une pompe hydraulique a capacite variable
JP2634969B2 (ja) 土木・建設機械の油圧駆動装置及びアンロード弁
JPH05202903A (ja) 液圧駆動システム
US5626015A (en) Delivery control device for hydraulic pumps and hydraulic systems with such devices
JP3513172B2 (ja) 油圧制御装置
JP2011038543A (ja) 設定圧可変式のリリーフ弁
EP2339073A1 (fr) Système hydraulique pour machine, machine et procédé d'utilisation
JP2006045851A (ja) 液圧回路の液圧制御装置
CN213655278U (zh) 控制装置和工作设备
JPS5960082A (ja) 可変容量型ポンプの制御装置
EP3347600B1 (fr) Dispositif de commande de détection de charge pour vannes de priorité
JP3344745B2 (ja) 油圧制御回路
EP2341253B1 (fr) Dispositif hydraulique de pilotage

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: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020327

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AXX Extension fees paid

Free format text: AL PAYMENT 20020327;LT PAYMENT 20020327;LV PAYMENT 20020327;MK PAYMENT 20020327;RO PAYMENT 20020327;SI PAYMENT 20020327

17Q First examination report despatched

Effective date: 20031107

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

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

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050427

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050427

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050427

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050427

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050427

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050427

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60019743

Country of ref document: DE

Date of ref document: 20050602

Kind code of ref document: P

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

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050727

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050727

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050727

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

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050804

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050804

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050804

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050807

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050831

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051010

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20050427

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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

ET Fr: translation filed
26N No opposition filed

Effective date: 20060130

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

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

Ref country code: GB

Payment date: 20150824

Year of fee payment: 16

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

Ref country code: FR

Payment date: 20150824

Year of fee payment: 16

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

Effective date: 20160804

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170428

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160804

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160831

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

Ref country code: IT

Payment date: 20190821

Year of fee payment: 20

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

Ref country code: DE

Payment date: 20191021

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 60019743

Country of ref document: DE