GB1231935A - - Google Patents

Info

Publication number
GB1231935A
GB1231935A GB1231935DA GB1231935A GB 1231935 A GB1231935 A GB 1231935A GB 1231935D A GB1231935D A GB 1231935DA GB 1231935 A GB1231935 A GB 1231935A
Authority
GB
United Kingdom
Prior art keywords
spool
ram
valve
energized
flow
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
Application number
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 filed Critical
Publication of GB1231935A publication Critical patent/GB1231935A/en
Expired 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86582—Pilot-actuated
    • Y10T137/86614—Electric

Landscapes

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

Abstract

1,231,935. 935. Hydraulic motor control circuits. ROBERT BOSCH G.m.b.H. April 23, 1969 [April 24, 1968], No.20722/69. Heading F1P. [Also in Division F2] The spool 19 of a reversing valve is urged to a neutral position by a double acting spring device 34, and is moved to provide the deserved flow and return connections to ram 17 by selectively connecting the ends of cylinder 27 to pressure fluid inlet 13 via orifice 43 and electromagnetically actuated pilot valves 45, 47. With both pilot valves open spool 19 is hydraulically free but is centralized by device 34 so locking ram 17. Energizing valve 45 closes the path between chamber 39 and outlet 14 so that pressure is applied to both chambers 37, 39 causing differential piston 36 to move spool 19 to the left. If now valve 47 is energized, a spool 19 is locked hydraulically and flow to ram 17 continues until valves 45, 47 are de-energized whereupon spool 19 is returned to its neutral position by device 34 and ram 17 is locked in its new position. To reverse the action of ram 17 valve 47 is energized so that fluid can only flow to chamber 37 thereby moving the spool to the right. According to a modification (not shown) the pilot valves are of single bent type. .
GB1231935D 1968-04-24 1969-04-23 Expired GB1231935A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1750358A DE1750358B2 (en) 1968-04-24 1968-04-24 Electro-hydraulic control device

Publications (1)

Publication Number Publication Date
GB1231935A true GB1231935A (en) 1971-05-12

Family

ID=5691778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1231935D Expired GB1231935A (en) 1968-04-24 1969-04-23

Country Status (4)

Country Link
US (1) US3556154A (en)
DE (1) DE1750358B2 (en)
FR (1) FR1597888A (en)
GB (1) GB1231935A (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987702A (en) * 1970-08-21 1976-10-26 Messerschmitt-Bolkow-Blohm Gmbh Method and device for electrohydraulic control of a hydraulic actuator
DE2112813C3 (en) * 1971-03-17 1981-04-30 Robert Bosch Gmbh, 7000 Stuttgart Electro-hydraulic control device
JPS5630883Y2 (en) * 1973-05-09 1981-07-23
DE2517205A1 (en) * 1975-04-18 1976-10-28 Danfoss As HYDRAULIC CONTROL DEVICE
DE2533829C2 (en) * 1975-07-29 1985-01-10 Robert Bosch Gmbh, 7000 Stuttgart Electro-hydraulic control device
JPS6048641B2 (en) * 1976-06-11 1985-10-29 株式会社日立製作所 fluid pressure servo valve
US4220074A (en) * 1977-05-25 1980-09-02 Vapor Corporation Switching valve
US4303003A (en) * 1977-05-25 1981-12-01 Vapor Corporation Switching valve
DE2928005A1 (en) * 1978-07-18 1980-02-14 Diesel Kiki Co REMOTE CONTROLLED PROPORTIONAL CONTROL DIRECTION SWITCHING CONTROL VALVE DEVICE
US4199942A (en) * 1978-09-28 1980-04-29 Eaton Corporation Load sensing control for hydraulic system
IT1119444B (en) * 1979-10-30 1986-03-10 Fiat Ricerche HYDRAULIC DISTRIBUTOR
US4638720A (en) * 1980-12-01 1987-01-27 Deere & Company Electro-hydraulic control system
EP0054619A1 (en) * 1980-12-22 1982-06-30 GebràœDer Sulzer Aktiengesellschaft Actuator with differential piston
US4804009A (en) * 1982-06-08 1989-02-14 Johnson Service Company Pneumatic interface apparatus for control of process systems
DE3246738C2 (en) * 1982-09-28 1987-02-05 Dr. H. Tiefenbach Gmbh & Co, 4300 Essen Self-medium controlled hydraulic valve with adjustable flow cross-section
US4566530A (en) * 1983-05-11 1986-01-28 United Aircraft Products, Inc. Pressure operated shuttle valve
US4770200A (en) * 1985-10-28 1988-09-13 Johnson Service Company Pneumatic interface apparatus
US5046397A (en) * 1987-04-29 1991-09-10 Vickers, Incorporated Electrohydraulic and hydromechanical valve system for dual-piston stroke controller
US4934143A (en) * 1987-04-29 1990-06-19 Vickers, Incorporated Electrohydraulic fluid control system for variable displacement pump
DE3817122A1 (en) * 1988-05-19 1989-11-30 Herion Werke Kg SAFETY VALVE
US5459405A (en) * 1991-05-22 1995-10-17 Wolff Controls Corp. Method and apparatus for sensing proximity of an object using near-field effects
US7775240B2 (en) * 2006-02-07 2010-08-17 Sturman Digital Systems, Llc Spool valve
US10202987B2 (en) * 2013-07-19 2019-02-12 Dresser, Llc Valve assembly having dual functionality for directional control of a piston on a fluid actuated device
US9546737B1 (en) * 2015-09-09 2017-01-17 James Wang Solenoid valve

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993510A (en) * 1956-11-28 1961-07-25 Int Basic Economy Corp Fluid control valve
US2898936A (en) * 1957-04-17 1959-08-11 Int Basic Economy Corp Pilot actuated fluid control valve
US2916051A (en) * 1958-03-12 1959-12-08 Elizabeth H Taylor Fluid pressure operated valve
US3129645A (en) * 1962-05-02 1964-04-21 Double A Prod Co Electrically modulated fluid valve
US3434390A (en) * 1966-04-25 1969-03-25 Bosch Arma Corp Valve control apparatus

Also Published As

Publication number Publication date
US3556154A (en) 1971-01-19
DE1750358B2 (en) 1974-09-19
FR1597888A (en) 1970-06-29
DE1750358C3 (en) 1975-04-30
DE1750358A1 (en) 1971-02-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee