FR2448059A1 - HYDRAULIC PILOT VALVE - Google Patents

HYDRAULIC PILOT VALVE

Info

Publication number
FR2448059A1
FR2448059A1 FR8002464A FR8002464A FR2448059A1 FR 2448059 A1 FR2448059 A1 FR 2448059A1 FR 8002464 A FR8002464 A FR 8002464A FR 8002464 A FR8002464 A FR 8002464A FR 2448059 A1 FR2448059 A1 FR 2448059A1
Authority
FR
France
Prior art keywords
pilot valve
pressure
hydraulic pilot
distributor
activated
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
FR8002464A
Other languages
French (fr)
Other versions
FR2448059B1 (en
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.)
Claas KGaA mbH
Original Assignee
Claas KGaA mbH
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 Claas KGaA mbH filed Critical Claas KGaA mbH
Publication of FR2448059A1 publication Critical patent/FR2448059A1/en
Application granted granted Critical
Publication of FR2448059B1 publication Critical patent/FR2448059B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—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
    • F15B13/043—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 electrically-controlled pilot valves
    • F15B13/0431—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 electrically-controlled pilot valves the electrical control resulting in an on-off function

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Check Valves (AREA)
  • Safety Valves (AREA)

Abstract

VANNE-PILOTE HYDRAULIQUE CARACTERISEE EN CE QU'AU MOINS UN DISTRIBUTEUR 2, 3 EST MAINTENU, UNIQUEMENT PAR LA PRESSION DE CIRCULATION, A L'ENCONTRE DE LA FORCE D'UN RESSORT 3, 5 DANS UNE POSITION NEUTRE ASSURANT LA LIBRE CIRCULATION DE L'HUILE LORSQUE LA SOUPAPE PILOTE CORRESPONDANTE 24, 9 N'EST PAS ACTIONNEE ET QUE LORS DE L'ACTIONNEMENT DE LA SOUPAPE PILOTE 24, 9 LE DISTRIBUTEUR 2, 3 EST AMENE DANS UN ETAT D'EQUILIBRE HYDRAULIQUE GRACE A LA PRESSION DE LA POMPE, ET EST AMENE DANS UNE POSITION QUI BLOQUE LA LIBRE CIRCULATION DE L'HUILE ET TRANSMET LA PRESSION DE LA POMPE AU CIRCUIT D'UTILISATION 6, 22, UNIQUEMENT PAR LA FORCE DU RESSORT 3, 5.HYDRAULIC PILOT VALVE CHARACTERIZED IN THAT AT LEAST ONE DISTRIBUTOR 2, 3 IS HELD, ONLY BY CIRCULATING PRESSURE, AGAINST THE FORCE OF A SPRING 3, 5 IN A NEUTRAL POSITION ENSURING FREE CIRCULATION OF L '' OIL WHEN THE CORRESPONDING PILOT VALVE 24, 9 IS NOT ACTIVATED AND WHEN THE PILOT VALVE 24, 9 IS ACTIVATED, THE DISTRIBUTOR 2, 3 IS TAKEN IN A STATE OF HYDRAULIC BALANCE THANKS TO THE PRESSURE OF THE PUMP , AND IS TAKEN INTO A POSITION WHICH BLOCKS FREE CIRCULATION OF OIL AND TRANSMITS PUMP PRESSURE TO OPERATING CIRCUIT 6, 22, ONLY BY THE FORCE OF SPRING 3, 5.

FR8002464A 1979-02-05 1980-02-05 HYDRAULIC PILOT VALVE Granted FR2448059A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792904293 DE2904293A1 (en) 1979-02-05 1979-02-05 HYDRAULIC CONTROL VALVE

Publications (2)

Publication Number Publication Date
FR2448059A1 true FR2448059A1 (en) 1980-08-29
FR2448059B1 FR2448059B1 (en) 1983-11-18

Family

ID=6062199

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8002464A Granted FR2448059A1 (en) 1979-02-05 1980-02-05 HYDRAULIC PILOT VALVE

Country Status (3)

Country Link
DE (1) DE2904293A1 (en)
FR (1) FR2448059A1 (en)
GB (1) GB2042135B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552492B1 (en) * 1983-09-23 1988-01-15 Alsacienne Constr Meca ELECTRO-HYDRAULIC VALVE CONTROL UNIT FOR AN INTERNAL COMBUSTION ENGINE
FR2585765B1 (en) * 1985-08-02 1989-06-30 Alsacienne Constr Meca ELECTRO-HYDRAULIC VALVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
DE4308084C2 (en) * 1993-03-13 1998-06-04 Claas Ohg Hydraulic control valve
DE19743801A1 (en) * 1997-10-02 1999-04-08 Claas Selbstfahr Erntemasch Device for controlling a hydraulic cylinder in a self-propelled harvesting machine
DE10023340A1 (en) 2000-05-12 2001-11-15 Claas Industrietechnik Gmbh Control valve for switching a hydraulic piston-cylinder unit for driving an oscillating machine part

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2236132A1 (en) * 1973-07-03 1975-01-31 Messier Hispano Sa
FR2322315A1 (en) * 1975-08-25 1977-03-25 Caterpillar Tractor Co Solenoid direction control valve - has pilot valves directing fluid to alternate chambers to shift control slide

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2232857C2 (en) * 1972-07-05 1983-11-24 Robert Bosch Gmbh, 7000 Stuttgart Control device for a hydraulically driven implement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2236132A1 (en) * 1973-07-03 1975-01-31 Messier Hispano Sa
FR2322315A1 (en) * 1975-08-25 1977-03-25 Caterpillar Tractor Co Solenoid direction control valve - has pilot valves directing fluid to alternate chambers to shift control slide

Also Published As

Publication number Publication date
FR2448059B1 (en) 1983-11-18
GB2042135B (en) 1983-03-09
GB2042135A (en) 1980-09-17
DE2904293A1 (en) 1980-08-07
DE2904293C2 (en) 1988-12-22

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Legal Events

Date Code Title Description
ST Notification of lapse