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GB1363781A - Hydraulic actuators - Google Patents

Hydraulic actuators

Info

Publication number
GB1363781A
GB1363781A GB3569972A GB3569972A GB1363781A GB 1363781 A GB1363781 A GB 1363781A GB 3569972 A GB3569972 A GB 3569972A GB 3569972 A GB3569972 A GB 3569972A GB 1363781 A GB1363781 A GB 1363781A
Authority
GB
United Kingdom
Prior art keywords
valves
valve
ports
restriction
fluid
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
GB3569972A
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.)
Houdaille Industries Inc
Original Assignee
Houdaille Industries Inc
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 Houdaille Industries Inc filed Critical Houdaille Industries Inc
Publication of GB1363781A publication Critical patent/GB1363781A/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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/224—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston which closes off fluid outlets in the cylinder bore by its own movement

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1363781 Hydraulic motor control circuits; semi-rotary actuators HOUDAILLE INDUSTRIES Inc 31 July 1972 [13 Oct 1971] 35699/72 Heading F1F and F1P An hydraulic actuator 10, Fig. 1, with ports 27, which are selectively connected to a source of fluid-pressure and exhaust by a valve 22, and spaced restrictions 28, 29 in the lines 25 between the valve 22 and ports 27, has valves 32 which by-pass the restrictions 28 when opened by the rise in pressure in the pressurized chamber of the actuator via a port 30 and line 30a, so that the running stroke of the piston is accelerated. The valves 32 are connected to the reservoir 20 through a restriction 37, which offers less resistance than the restriction 28 and ensures that the return line remains filled. Check-valves 42 provide anti-cavitation inflow. Snubber valves 44 gradually arrest the valve 17 at the end of the stroke by progressively closing the appropriate exhaust port 27. As shown in Fig. 3 the valves are pivoted and spring urged against the end closure 12. Fluid is admitted through what was previously the exhaust port by the upward movement of the valve 44 against the spring 53.
GB3569972A 1971-10-13 1972-07-31 Hydraulic actuators Expired GB1363781A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18875671A 1971-10-13 1971-10-13

Publications (1)

Publication Number Publication Date
GB1363781A true GB1363781A (en) 1974-08-14

Family

ID=22694402

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5582173A Expired GB1363782A (en) 1971-10-13 1972-07-31 Hydraulic actuators
GB3569972A Expired GB1363781A (en) 1971-10-13 1972-07-31 Hydraulic actuators

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB5582173A Expired GB1363782A (en) 1971-10-13 1972-07-31 Hydraulic actuators

Country Status (4)

Country Link
US (1) US3771422A (en)
JP (1) JPS5644287B2 (en)
CA (1) CA969070A (en)
GB (2) GB1363782A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122689A (en) * 1982-06-24 1984-01-18 Dobson Park Ind Rotation limiting system

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE429111B (en) * 1978-10-19 1983-08-15 Atlas Copco Ab HYDRAULIC DRIVES
US4713936A (en) * 1985-11-18 1987-12-22 Deere & Company Motor seal protector valve
KR100474259B1 (en) * 1996-11-26 2005-06-20 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Hydraulic devices for cylinders for work tools of construction machinery
US6038956A (en) * 1998-04-02 2000-03-21 Lane; Norman Dynamic pressure regulator cushion
DE10207076A1 (en) * 2002-02-20 2003-08-28 Zahnradfabrik Friedrichshafen Oil supply
DE102009027935A1 (en) * 2009-07-22 2011-01-27 Bucher Hydraulics Gmbh Hydraulic arrangement
FR2958981B1 (en) * 2010-04-15 2012-08-24 Messier Dowty Sa ELECTROMECHANICAL ACTUATOR WITH HYDRAULIC REGULATION, AND LIGHTER EQUIPPED WITH SUCH ACTUATOR FOR ITS MANEUVER
US8857757B2 (en) 2012-08-02 2014-10-14 Bell Helicopter Textron Inc. Independent blade control system with hydraulic pitch link
US9061760B2 (en) * 2012-08-02 2015-06-23 Bell Helicopter Textron Inc. Independent blade control system with rotary blade actuator
US8973864B2 (en) 2012-08-02 2015-03-10 Bell Helicopter Textron Inc. Independent blade control system with hydraulic cyclic control
US9162760B2 (en) 2012-08-02 2015-10-20 Bell Helicopter Textron Inc. Radial fluid device with multi-harmonic output
US9376205B2 (en) 2012-08-02 2016-06-28 Bell Helicopter Textron Inc. Radial fluid device with variable phase and amplitude
US9234535B2 (en) 2013-02-27 2016-01-12 Woodward, Inc. Rotary piston type actuator
US9163648B2 (en) 2013-02-27 2015-10-20 Woodward, Inc. Rotary piston type actuator with a central actuation assembly
US9816537B2 (en) 2013-02-27 2017-11-14 Woodward, Inc. Rotary piston type actuator with a central actuation assembly
CA2915968A1 (en) * 2013-06-19 2014-12-24 Woodward, Inc. Rotary piston type actuator with hydraulic supply
US11199248B2 (en) 2019-04-30 2021-12-14 Woodward, Inc. Compact linear to rotary actuator
EP4133186B1 (en) 2020-04-08 2025-10-01 Woodward, Inc. Rotary piston type actuator with a central actuation assembly
CN119096100A (en) * 2022-04-28 2024-12-06 松下知识产权经营株式会社 Refrigeration unit
WO2023210457A1 (en) * 2022-04-28 2023-11-02 パナソニックＩｐマネジメント株式会社 Refrigeration device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191505A (en) * 1961-11-21 1965-06-29 William L Defibaugh Hydraulic control for a slide unit
US3323422A (en) * 1965-08-02 1967-06-06 Cessna Aircraft Co Cushion stop for hydraulic cylinders
US3398650A (en) * 1966-02-04 1968-08-27 Moog Inc Apparatus for regulating fluid flow with respect to a hydraulic load
US3396635A (en) * 1966-11-30 1968-08-13 Cessna Aircraft Co Cushion stop for hydraulic actuators
US3470792A (en) * 1967-08-02 1969-10-07 Cessna Aircraft Co Maximum pressure control apparatus for hydraulic actuators
US3537356A (en) * 1968-01-02 1970-11-03 Dake Corp Hydraulic control systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122689A (en) * 1982-06-24 1984-01-18 Dobson Park Ind Rotation limiting system

Also Published As

Publication number Publication date
JPS5644287B2 (en) 1981-10-19
US3771422A (en) 1973-11-13
CA969070A (en) 1975-06-10
JPS4846771A (en) 1973-07-03
GB1363782A (en) 1974-08-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee