GB2012922A - Control Valve with Spring Return - Google Patents

Control Valve with Spring Return

Info

Publication number
GB2012922A
GB2012922A GB791935A GB7901935A GB2012922A GB 2012922 A GB2012922 A GB 2012922A GB 791935 A GB791935 A GB 791935A GB 7901935 A GB7901935 A GB 7901935A GB 2012922 A GB2012922 A GB 2012922A
Authority
GB
United Kingdom
Prior art keywords
spring
valve
control
control valve
connections
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
GB791935A
Other versions
GB2012922B (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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen 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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of GB2012922A publication Critical patent/GB2012922A/en
Application granted granted Critical
Publication of GB2012922B publication Critical patent/GB2012922B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
    • 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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves

Landscapes

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

Abstract

The valve comprises a valve housing (4) having connections (1), (2) (3) for control supply and discharge medium, annular channels (5, 6) at the connections (2) and (3), and a control slide valve (7), having control edges (8, 9) respectively associated with the channels. The position of the slide valve is determined by the control pressure obtaining on one side and by a helical primary spring (10) on the other side. A secondary helical spring (11) is concentrically received within the primary spring and is held captive within a sleeve (12). The length of spring (10) is significantly greater than the secondary spring. The pretension of the secondary spring is adjustable within the sleeve by an abutment (13), the axial position of which can be varied by screwthreads before or after assembly of the valve. <IMAGE>
GB791935A 1978-01-21 1979-01-19 Control valve with spring return Expired GB2012922B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782802675 DE2802675A1 (en) 1978-01-21 1978-01-21 CONTROL VALVE WITH SPRING RESET

Publications (2)

Publication Number Publication Date
GB2012922A true GB2012922A (en) 1979-08-01
GB2012922B GB2012922B (en) 1982-04-21

Family

ID=6030093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB791935A Expired GB2012922B (en) 1978-01-21 1979-01-19 Control valve with spring return

Country Status (6)

Country Link
BR (1) BR7900350A (en)
DE (1) DE2802675A1 (en)
FR (1) FR2417046A1 (en)
GB (1) GB2012922B (en)
IT (1) IT1114349B (en)
PL (1) PL212926A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440272A (en) * 1980-08-12 1984-04-03 Zahnradfabrik Friedrichshafen Ag Apparatus for controlling the braking effect of a hydraulic retarder
EP0136567A2 (en) * 1983-09-05 1985-04-10 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Seat valve for the flow control of a medium flowing through a tube

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE452471A (en) *
DE2049818A1 (en) * 1970-10-10 1972-04-13 Ver Flugtechnische Werke Pressure relief valve
DE2547916C2 (en) * 1975-10-25 1986-06-05 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Limit switch-off for the steering motor of hydraulic motor vehicle power steering systems

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440272A (en) * 1980-08-12 1984-04-03 Zahnradfabrik Friedrichshafen Ag Apparatus for controlling the braking effect of a hydraulic retarder
EP0136567A2 (en) * 1983-09-05 1985-04-10 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Seat valve for the flow control of a medium flowing through a tube
EP0136567A3 (en) * 1983-09-05 1987-01-21 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Seat valve for the flow control of a medium flowing through a tube

Also Published As

Publication number Publication date
PL212926A1 (en) 1979-11-05
GB2012922B (en) 1982-04-21
BR7900350A (en) 1979-08-14
FR2417046A1 (en) 1979-09-07
DE2802675A1 (en) 1979-07-26
IT7947671A0 (en) 1979-01-17
IT1114349B (en) 1986-01-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee