AU460377B2 - Hydraulic jack stroke cushioning means - Google Patents

Hydraulic jack stroke cushioning means

Info

Publication number
AU460377B2
AU460377B2 AU37753/72A AU3775372A AU460377B2 AU 460377 B2 AU460377 B2 AU 460377B2 AU 37753/72 A AU37753/72 A AU 37753/72A AU 3775372 A AU3775372 A AU 3775372A AU 460377 B2 AU460377 B2 AU 460377B2
Authority
AU
Australia
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
AU37753/72A
Other versions
AU3775372A (en
Inventor
Frank Berg Lawrance
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
Publication of AU3775372A publication Critical patent/AU3775372A/en
Application granted granted Critical
Publication of AU460377B2 publication Critical patent/AU460377B2/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
AU37753/72A 1971-03-29 1972-01-10 Hydraulic jack stroke cushioning means Expired AU460377B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12882271A 1971-03-29 1971-03-29
USUS128,822 1971-03-29

Publications (2)

Publication Number Publication Date
AU3775372A AU3775372A (en) 1973-07-12
AU460377B2 true AU460377B2 (en) 1975-04-24

Family

ID=22437141

Family Applications (1)

Application Number Title Priority Date Filing Date
AU37753/72A Expired AU460377B2 (en) 1971-03-29 1972-01-10 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
DE3269801D1 (en) * 1981-06-30 1986-04-17 Hitachi Construction Machinery 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
CN1148514C (en) * 1998-05-29 2004-05-05 日立建机株式会社 Oil 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
US10151333B2 (en) * 2013-02-13 2018-12-11 Safran Landing Systems Canada Inc./ Safran Systèmes d'Atterrissage Canada Inc. Modular actuator with snubbing arrangement
US20220228640A1 (en) * 2019-05-31 2022-07-21 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
IT948664B (en) 1973-06-11
GB1342548A (en) 1974-01-03
FR2132013B1 (en) 1978-02-10
AU3775372A (en) 1973-07-12
BE779391A (en) 1972-08-16
US3704650A (en) 1972-12-05
DE2214032A1 (en) 1972-10-12
CA940014A (en) 1974-01-15
FR2132013A1 (en) 1972-11-17
SE374949B (en) 1975-03-24
JPS5521208B1 (en) 1980-06-07

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