GB723845A - Improvements in or relating to liquid pressure servo-motor systems - Google Patents

Improvements in or relating to liquid pressure servo-motor systems

Info

Publication number
GB723845A
GB723845A GB2841252A GB2841252A GB723845A GB 723845 A GB723845 A GB 723845A GB 2841252 A GB2841252 A GB 2841252A GB 2841252 A GB2841252 A GB 2841252A GB 723845 A GB723845 A GB 723845A
Authority
GB
United Kingdom
Prior art keywords
passages
servomotor
valve
grooves
pressure
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
GB2841252A
Inventor
Charles Victor Gardner
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.)
Automotive Products PLC
Original Assignee
Automotive Products PLC
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 Automotive Products PLC filed Critical Automotive Products PLC
Priority to GB2841252A priority Critical patent/GB723845A/en
Publication of GB723845A publication Critical patent/GB723845A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01Locking-valves or other detent i.e. load-holding devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

723,845. Fluid-pressure servomotors; hydraulic transmissions. AUTOMOTIVE PRODUCTS CO., Ltd. Oct. 20, 1953 [Nov. 11, 1952], No.28412/52. Classes 69 (2) and 136. In a liquid pressure servomotor system including a double-acting servomotor 10 and a control valve 16 therefor, the control valve, when in its neutral position, connects each end of the servomotor to one of a pair of passages 31, 32 leading from a source of liquid pressure such as the accumulator 38, a non-return valve 34 or 35 being provided in each of the passages to prevent flow of liquid from either end of the servomotor cylinder 11 through the passages and thus lock the servomotor in any position to which it is set. The control valve 16 has a pair of circumferential grooves 17, 18 separated by a land 19, and a pair of diametral passages 22, 23 permanently connected by an axial bore 21 closed at both ends. The grooves 17, 18 are always in communication with passages 28, 29 leading to opposite sides of the servo-piston 12, and in the neutral position shown, are also in communication with circumferential grooves 25, 26 leading to the passages 31, 32 respectively. On movement of the valve 16 to either side of the neutral position, the grooves 17, 18 are cut off from the respective grooves 25, 26 and connected to grooves 24, 27 respectively, the latter due to the passages 21, 22, 23 and a connection 37 being permanently connected to a low-pressure reservoir 41. The accumulator 38 is supplied by a pump 40, the delivery of which is passed back to the reservoir 41 by a cut-out valve 42 when the accumulator pressure reaches a predetermined upper limit, the valve 42 restoring the connection to the accumulator at a predetermined lower limit of pressure. A follow-up connection may be provided between the valve 16 and the servomotor. The effective areas at opposite sides of the piston are equal.
GB2841252A 1952-11-11 1952-11-11 Improvements in or relating to liquid pressure servo-motor systems Expired GB723845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2841252A GB723845A (en) 1952-11-11 1952-11-11 Improvements in or relating to liquid pressure servo-motor systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2841252A GB723845A (en) 1952-11-11 1952-11-11 Improvements in or relating to liquid pressure servo-motor systems

Publications (1)

Publication Number Publication Date
GB723845A true GB723845A (en) 1955-02-09

Family

ID=10275215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2841252A Expired GB723845A (en) 1952-11-11 1952-11-11 Improvements in or relating to liquid pressure servo-motor systems

Country Status (1)

Country Link
GB (1) GB723845A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133475A (en) * 1960-11-22 1964-05-19 Gen Electric Hydraulically-actuated operating mechanism for an electric circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133475A (en) * 1960-11-22 1964-05-19 Gen Electric Hydraulically-actuated operating mechanism for an electric circuit breaker

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