CA940014A - Hydraulic jack stroke cushioning means - Google Patents

Hydraulic jack stroke cushioning means

Info

Publication number
CA940014A
CA940014A CA131,595A CA131595A CA940014A CA 940014 A CA940014 A CA 940014A CA 131595 A CA131595 A CA 131595A CA 940014 A CA940014 A CA 940014A
Authority
CA
Canada
Prior art keywords
hydraulic jack
cushioning means
jack stroke
stroke cushioning
hydraulic
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
CA131,595A
Other versions
CA131595S (en
Inventor
Lawrence F. Berg
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor 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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Priority to CA167648A priority Critical patent/CA933065A/en
Priority to CA176,894A priority patent/CA960542A/en
Application granted granted Critical
Publication of CA940014A publication Critical patent/CA940014A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • 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
    • F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
CA131,595A 1971-03-29 1972-01-04 Hydraulic jack stroke cushioning means Expired CA940014A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA167648A CA933065A (en) 1971-03-29 1973-04-02 Hydraulic jack stroke cushioning means
CA176,894A CA960542A (en) 1971-03-29 1973-07-19 Hydraulic jack stroke cushioning means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12882271A 1971-03-29 1971-03-29

Publications (1)

Publication Number Publication Date
CA940014A true CA940014A (en) 1974-01-15

Family

ID=22437141

Family Applications (1)

Application Number Title Priority Date Filing Date
CA131,595A Expired CA940014A (en) 1971-03-29 1972-01-04 Hydraulic jack stroke cushioning means

Country Status (10)

Country Link
US (1) US3704650A (en)
JP (1) JPS5521208B1 (en)
AU (1) AU460377B2 (en)
BE (1) BE779391A (en)
CA (1) CA940014A (en)
DE (1) DE2214032A1 (en)
FR (1) FR2132013B1 (en)
GB (1) GB1342548A (en)
IT (1) IT948664B (en)
SE (1) SE374949B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964370A (en) * 1974-07-15 1976-06-22 Parker-Hannifin Corporation Cushioning means for hydraulic cylinder
US3913451A (en) * 1974-08-30 1975-10-21 Cincinnati Milacron Inc Hydraulic cylinder with cushioning means
US4006666A (en) * 1975-05-22 1977-02-08 Towmotor Corporation Cushioning device for a hydraulic jack
US4033235A (en) * 1976-01-26 1977-07-05 Caterpillar Tractor Co. Fluid operated ram
US4064788A (en) * 1976-07-29 1977-12-27 Parker-Hannifin Corporation Cushioning means for hydraulic cylinder
US4386555A (en) * 1979-02-09 1983-06-07 Sperry Corporation Hydraulic cylinder cushion device
US4424737A (en) * 1980-03-26 1984-01-10 Kabushiki Kaisha Komatsu Seisakusho Stroke cushioning apparatus for hydraulic cylinders
EP0068495B1 (en) * 1981-06-30 1986-03-12 Hitachi Construction Machinery Co., Ltd. Shock absorbing device for hydraulic cylinder
US4517878A (en) * 1981-10-20 1985-05-21 Hitachi Construction Machinery Co., Ltd. Shock absorbing device for hydraulic cylinder
AU1164083A (en) * 1982-02-11 1983-08-18 Sperry Ltd. Control valve for a fluid operated piston-cylinder assembly
US6386088B1 (en) * 1998-05-29 2002-05-14 Hitachi Construction Machinery, Co. Ltd. Hydraulic cylinder
DE19836422C2 (en) * 1998-08-12 2002-10-24 Mannesmann Rexroth Ag Pressure operated cylinder
GB9910257D0 (en) * 1999-05-05 1999-06-30 Lucas Ind Plc Piston and cylinder assembly and flow restrictor device therefor
US7121185B2 (en) * 2004-05-28 2006-10-17 Caterpillar Inc. Hydraulic cylinder having a snubbing valve
ITTO20050043A1 (en) * 2005-01-27 2006-07-28 Enzo Gusella ACTUATOR DEVICE, IN PARTICULAR FOR A OCTOPUS BUCKET.
JP4851992B2 (en) * 2007-05-22 2012-01-11 カヤバ工業株式会社 Cushion ring and fluid pressure cylinder
EP2956679B1 (en) * 2013-02-13 2020-04-29 Safran Landing Systems Canada Inc. Modular actuator with snubbing arrangement
WO2020237344A1 (en) * 2019-05-31 2020-12-03 Hydra Dyne Technology Inc. Stroke cushioning in piston and cylinder devices
US11067104B1 (en) * 2020-11-16 2021-07-20 Caterpillar Inc. Integrated cylinder piston and bearing as a hydraulic cushion
US11319972B1 (en) * 2021-05-11 2022-05-03 Caterpillar Inc. Hydraulic cylinder snubbing retention arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493602A (en) * 1947-12-31 1950-01-03 Vance C Sterrett Pressure fluid motor
US2642845A (en) * 1950-12-20 1953-06-23 Westinghouse Air Brake Co Piston cushioning apparatus
US2704996A (en) * 1952-07-17 1955-03-29 Hannifin Corp Fluid operated cylinder with adjustable cushion

Also Published As

Publication number Publication date
US3704650A (en) 1972-12-05
IT948664B (en) 1973-06-11
FR2132013B1 (en) 1978-02-10
GB1342548A (en) 1974-01-03
AU3775372A (en) 1973-07-12
DE2214032A1 (en) 1972-10-12
JPS5521208B1 (en) 1980-06-07
FR2132013A1 (en) 1972-11-17
AU460377B2 (en) 1975-04-24
SE374949B (en) 1975-03-24
BE779391A (en) 1972-08-16

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