GB769310A - Improvements in or relating to hydraulic valve units - Google Patents

Improvements in or relating to hydraulic valve units

Info

Publication number
GB769310A
GB769310A GB2853153A GB2853153A GB769310A GB 769310 A GB769310 A GB 769310A GB 2853153 A GB2853153 A GB 2853153A GB 2853153 A GB2853153 A GB 2853153A GB 769310 A GB769310 A GB 769310A
Authority
GB
United Kingdom
Prior art keywords
piston
valve
spring
main valve
passage
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
GB2853153A
Inventor
George Orloff
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.)
British Messier Ltd
Original Assignee
British Messier Ltd
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 British Messier Ltd filed Critical British Messier Ltd
Priority to GB2853153A priority Critical patent/GB769310A/en
Publication of GB769310A publication Critical patent/GB769310A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512—Arrangement of valves
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
    • F16K31/383—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fluid-Driven Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

769,310. Valves controlled by auxiliary valves. BRITISH MESSIER, Ltd. Oct. 4, 1954 [Oct. 15, 1953], No. 28531/53. Class 135. In an hydraulic valve unit of the kind in which a main valve 11 resiliently biased towards a seating 15 is operated by a piston 34 under the control of a pilot valve 20, and in which the piston works in a cylinder 12 one end of which is connected to the main inlet passage 16 and the other end of which is connected by a by-pass passage 19, 21 containing the pilot valve 20 to the main outlet 22, a spring-loaded bleed control member movable relative to the piston in response to the pressure difference across the piston, is provided for varying the effective area of a bleed passage between the two sides of the piston so that the rate of travel of the main valve is controlled in a predetermined manner. In Fig. 1, the piston 34 and the main valve 11 are mechanically coupled for limited lost-motion, the valve head 13 being urged by a spring 31 against the seating 15, and the piston 34 by a spring 33 against a shoulder 35. The spring 33 also abuts against a fixed plug 32. The valve head 13 is carried on a stem 38 guided in a bore in the piston and carrying a ball-shaped poppet 39 forming the bleed control member. The poppet 39 after initial movement of the piston 34 sits in a hemispherical countersunk mouth 44 in the piston and cuts off the flow through the bleed passage constituted by ducts 41, 42, 43 so that the main valve is entrained by the piston 34. Subsequently the delivery pressure causes the main valve to move towards the plug 32 and the annular passage between the poppet 39 and the mouth 44 re-opens. The available flow area through this annular passage thus depends upon the pressure difference across the piston 34. In a further modification, the piston is integral with the head of the main valve and has a bore containing a shuttle member an orifice in which co-operates with a needle valve rigid with the piston. The shuttle member is normally pressed away from the needle valve by a spring.
GB2853153A 1953-10-15 1953-10-15 Improvements in or relating to hydraulic valve units Expired GB769310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2853153A GB769310A (en) 1953-10-15 1953-10-15 Improvements in or relating to hydraulic valve units

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2853153A GB769310A (en) 1953-10-15 1953-10-15 Improvements in or relating to hydraulic valve units

Publications (1)

Publication Number Publication Date
GB769310A true GB769310A (en) 1957-03-06

Family

ID=10277106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2853153A Expired GB769310A (en) 1953-10-15 1953-10-15 Improvements in or relating to hydraulic valve units

Country Status (1)

Country Link
GB (1) GB769310A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478412A (en) * 1982-05-26 1984-10-23 Muir Arthur M Exercise device and control valve therefor
US4611628A (en) * 1984-07-04 1986-09-16 Dragerwerk Aktiengesellschaft Attenuator valve for a pressure-gas conduit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478412A (en) * 1982-05-26 1984-10-23 Muir Arthur M Exercise device and control valve therefor
US4611628A (en) * 1984-07-04 1986-09-16 Dragerwerk Aktiengesellschaft Attenuator valve for a pressure-gas conduit

Similar Documents

Publication Publication Date Title
US2815041A (en) Single solenoid hydraulic control valve
GB920331A (en) Improvements in and relating to a control operator for valves
GB1526630A (en) Solenoid pilot operated valve
GB1237487A (en) Check valve
GB948378A (en) Improvements in or relating to multi-fluid spray guns
US2534821A (en) Control means
GB1339774A (en) Valves for fluids
GB1194556A (en) Improvements in or relating to Dual Brake Valves
GB1193773A (en) Control Valve
GB769310A (en) Improvements in or relating to hydraulic valve units
GB1050085A (en)
GB705669A (en) Improvements relating to valve systems for the control of fluid pressure
GB651963A (en) Hydraulic valve assembly for power transmission systems
GB1083573A (en) Air conditioning apparatus for aircraft
US2350988A (en) Valve
GB1425892A (en) Electromagnetically actuable valves
GB783927A (en) Improvements relating to pilot valves
GB1145196A (en) Control valve
GB932788A (en) Improved pressure reducing valve
GB894544A (en) Valve system for controlling fluid flow
GB1200766A (en) Pressure regulating valve
GB742148A (en) Improvements in or relating to hydraulic variable pitch propellers
GB875126A (en) Improvements relating to hydraulic control systems
GB992613A (en) A fluid flow control valve
GB1176590A (en) Improvements in or relating to Cushion Relief Valves