SE7902627L - HYDRAULIC DIRECTION VALVE - Google Patents

HYDRAULIC DIRECTION VALVE

Info

Publication number
SE7902627L
SE7902627L SE7902627A SE7902627A SE7902627L SE 7902627 L SE7902627 L SE 7902627L SE 7902627 A SE7902627 A SE 7902627A SE 7902627 A SE7902627 A SE 7902627A SE 7902627 L SE7902627 L SE 7902627L
Authority
SE
Sweden
Prior art keywords
connection port
spool
pump
flow path
pressurized liquid
Prior art date
Application number
SE7902627A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE439183B (en
Inventor
C-J Omberg
T Zettergren
Original Assignee
Nordhydraulic Ab
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 Nordhydraulic Ab filed Critical Nordhydraulic Ab
Priority to SE7902627A priority Critical patent/SE439183B/en
Priority to DE19803009699 priority patent/DE3009699A1/en
Priority to GB8008952A priority patent/GB2044892B/en
Publication of SE7902627L publication Critical patent/SE7902627L/en
Publication of SE439183B publication Critical patent/SE439183B/en

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
    • F15B13/0433—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 pilot valves being pressure control valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Servomotors (AREA)

Abstract

In a hydraulically operated directional control valve of open- centre type the spool (12) is remotely operated electro-hydraulically by valves (36,37) controlling flow of pressurized liquid from a pump connection port (23) to drain. The pressurized liquid acting in chambers (13,13A) on the ends of the spool. In order that an adequate operating pressure may always be available, the spool (12) is adapted upon movement away from the neutral position to restrict the flow path between the pump connection port (23) and the tank connection port (25) rapidly enough to ensure that the pressure produced by the pump increases to the value required for a firmly controlled displacement of the spool (12) throughout the displacement range before the opening of the flow path between the pump connection port (23) and the load connection port (26,27) begins. <IMAGE>
SE7902627A 1979-03-23 1979-03-23 HYDRAULIC DIRECTION VALVE SE439183B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE7902627A SE439183B (en) 1979-03-23 1979-03-23 HYDRAULIC DIRECTION VALVE
DE19803009699 DE3009699A1 (en) 1979-03-23 1980-03-13 CONTROL VALVE WITH NEUTRAL POSITION
GB8008952A GB2044892B (en) 1979-03-23 1980-03-17 Hydraulic directional control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7902627A SE439183B (en) 1979-03-23 1979-03-23 HYDRAULIC DIRECTION VALVE

Publications (2)

Publication Number Publication Date
SE7902627L true SE7902627L (en) 1980-09-24
SE439183B SE439183B (en) 1985-06-03

Family

ID=20337628

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7902627A SE439183B (en) 1979-03-23 1979-03-23 HYDRAULIC DIRECTION VALVE

Country Status (3)

Country Link
DE (1) DE3009699A1 (en)
GB (1) GB2044892B (en)
SE (1) SE439183B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3137527A1 (en) * 1981-09-22 1983-04-07 Robert Bosch Gmbh, 7000 Stuttgart Hydraulic control arrangement with a directional control valve
DE3138411A1 (en) * 1981-09-26 1983-04-14 Robert Bosch Gmbh, 7000 Stuttgart Hydraulic directional control valve
US4574843A (en) * 1983-05-26 1986-03-11 Double A Products Co. Solenoid valve override cartridge
GB2171778B (en) * 1985-03-01 1988-11-30 Coal Ind Hydraulic valve block for determining the operational condition of hydraulic circuits
DE19800720C2 (en) * 1998-01-12 2001-10-31 Sauer Danfoss Nordborg As Nord Control valve for a hydraulic motor
CA2842663A1 (en) * 2011-08-29 2013-03-07 Exxonmobil Upstream Research Company System and method for high speed hydraulic actuation
EP2956676B1 (en) * 2013-02-15 2019-07-17 Parker Hannifin Corporation Variable load sense open center hybrid system

Also Published As

Publication number Publication date
GB2044892B (en) 1983-02-23
SE439183B (en) 1985-06-03
GB2044892A (en) 1980-10-22
DE3009699A1 (en) 1980-10-02

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