GB1217304A - Fluid flow control instrumentality - Google Patents

Fluid flow control instrumentality

Info

Publication number
GB1217304A
GB1217304A GB3240469A GB3240469A GB1217304A GB 1217304 A GB1217304 A GB 1217304A GB 3240469 A GB3240469 A GB 3240469A GB 3240469 A GB3240469 A GB 3240469A GB 1217304 A GB1217304 A GB 1217304A
Authority
GB
United Kingdom
Prior art keywords
valve
motor
pressure
spool
exhaust
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
GB3240469A
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.)
Koehring Co
Original Assignee
Koehring Co
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 Koehring Co filed Critical Koehring Co
Publication of GB1217304A publication Critical patent/GB1217304A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
    • 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
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87177—With bypass

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Safety Valves (AREA)

Abstract

1,217,304. Hydraulic motor control circuit. KOEHRING CO. June 26, 1969 [Dec. 13, 1968], No. 32404/69. Heading F1P. [Also in Division F2] In a valve mechanism for controlling doubleacting motor 7, fluid pump 12 passes via check valve 18, passage 15 and line 17 to chamber 16 whence it is admitted to one side or the other of the motor upon raising of spool 19 or 20 by actuation of pilot valve 8 to pressurize port C1 or C2. The other port is simultaneously depressurized to allow the other spool to be lowered by work port pressure applied there above via 34, 35 to exhaust the other side of the motor. When the motor is acting against a load, delivery pressure at 15 is high and acts via 60 on plunger 61 to unseat valve 51 to provide an exhaust path via 30, 53, 52, 13. When the load assists the motor pressure at 15 falls whereas that at 52 rises and the pressure differential across valve 50 eventually unseats the latter to allow the exhaust fluid to flow to 15 thereby supplementing the pump output and preventing void formation in the motor. The exhaust fluid also flows via 67, 68, 57, 69 to assist in keeping pilot operated pump unloader valve 48 closed, and via 43 and pilot valve 8 to assist in keeping the operative spool raised. In Fig. 2, pressure rise at 52 eventually moves valve 80 leftwards and acts in chamber 57 to bias relief valve 72 closed. Valve 80 may be embodied in the relief valve.
GB3240469A 1968-12-13 1969-06-26 Fluid flow control instrumentality Expired GB1217304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78362268A 1968-12-13 1968-12-13

Publications (1)

Publication Number Publication Date
GB1217304A true GB1217304A (en) 1970-12-31

Family

ID=25129888

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3240469A Expired GB1217304A (en) 1968-12-13 1969-06-26 Fluid flow control instrumentality

Country Status (7)

Country Link
US (1) US3534775A (en)
BE (1) BE742228A (en)
DE (1) DE1955862A1 (en)
ES (1) ES369424A1 (en)
FR (1) FR2026047A1 (en)
GB (1) GB1217304A (en)
NL (1) NL6917223A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2916507A1 (en) * 1979-04-24 1980-11-13 Bosch Gmbh Robert MULTI-CIRCUIT PROTECTION VALVE UNIT
GB2149889A (en) * 1980-08-13 1985-06-19 Commercial Shearing A combination check and relief valve

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041836A (en) * 1974-05-08 1977-08-16 Hikaru Murata Open circuit type acceleration/deceleration device
JP7095589B2 (en) * 2018-12-26 2022-07-05 株式会社豊田自動織機 Hydraulic drive for industrial vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2916507A1 (en) * 1979-04-24 1980-11-13 Bosch Gmbh Robert MULTI-CIRCUIT PROTECTION VALVE UNIT
GB2149889A (en) * 1980-08-13 1985-06-19 Commercial Shearing A combination check and relief valve

Also Published As

Publication number Publication date
US3534775A (en) 1970-10-20
FR2026047A1 (en) 1970-09-11
NL6917223A (en) 1970-06-16
ES369424A1 (en) 1971-05-16
DE1955862A1 (en) 1970-07-02
BE742228A (en) 1970-05-04

Similar Documents

Publication Publication Date Title
GB1040379A (en) Fluid motor control system
US3943824A (en) Hydraulic system
US2467508A (en) Hydraulic system
GB1467603A (en) Control valve for controlling the operation of a mechanism to be powered from a pressurised fluid supply
GB1027184A (en) Hydraulic forming press
ES420137A1 (en) Pumps with servo-type actuation for cheek plate unloading
GB1201787A (en) Dual pressure relief valve
GB1474421A (en) Variable pressure hydraulic system
GB1469918A (en) Fast exhaust circuit for hydraulic jacks
GB1387367A (en) Control device for an hydraulically actuated implement
GB1339656A (en) Control circuit and lock valve for pivot axle lockout rams
GB1464141A (en) Valve mechanism for an elevator hydraulic system
GB966094A (en) Improvements in or relating to the driving and/or extraction of piles and similar structural members
US3064426A (en) Hydraulic systems
GB1212072A (en) Hydraulic control circuits
GB1217304A (en) Fluid flow control instrumentality
GB959878A (en) Fluid pressure system and control
JPS5925881B2 (en) hydraulic control device
GB1494844A (en) Fluid control circuits
JPS6429681A (en) Hydraulic gain control circuit
GB1366669A (en) Fluid flow controlling device for reversible fluid motors
US2728194A (en) Control circuit for hydraulic power transmission
US2846848A (en) Fluid pressure system and control
US4327549A (en) Controlled pressure upstaging and flow reduction
GB1426357A (en) Hydraulic self-levelling device for a boom-mounted bucket