GB1342548A - Hydraulic jacks - Google Patents

Hydraulic jacks

Info

Publication number
GB1342548A
GB1342548A GB331072A GB331072A GB1342548A GB 1342548 A GB1342548 A GB 1342548A GB 331072 A GB331072 A GB 331072A GB 331072 A GB331072 A GB 331072A GB 1342548 A GB1342548 A GB 1342548A
Authority
GB
United Kingdom
Prior art keywords
sleeve
rod
bore
piston
cylinder
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
GB331072A
Other languages
English (en)
Inventor
L 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
Publication of GB1342548A publication Critical patent/GB1342548A/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)
GB331072A 1971-03-29 1972-01-24 Hydraulic jacks Expired GB1342548A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1342548A true GB1342548A (en) 1974-01-03

Family

ID=22437141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB331072A Expired GB1342548A (en) 1971-03-29 1972-01-24 Hydraulic jacks

Country Status (10)

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

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 (fr) * 1981-06-30 1986-03-12 Hitachi Construction Machinery Co., Ltd. Dispositif amortisseur pour un cylindre hydraulique
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 (de) * 1998-08-12 2002-10-24 Mannesmann Rexroth Ag Druckmittelbetätigter Arbeitszylinder
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 (it) * 2005-01-27 2006-07-28 Enzo Gusella Dispositivo attuatore, in particolare per una benna a polipo.
JP4851992B2 (ja) * 2007-05-22 2012-01-11 カヤバ工業株式会社 クッションリング及び流体圧シリンダ
EP2956679B1 (fr) * 2013-02-13 2020-04-29 Safran Landing Systems Canada Inc. Actionneur modulaire à agencement de retenue
WO2020237344A1 (fr) * 2019-05-31 2020-12-03 Hydra Dyne Technology Inc. Amortissement de course dans des dispositifs à piston et cylindre
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 (it) 1973-06-11
CA940014A (en) 1974-01-15
FR2132013B1 (fr) 1978-02-10
AU3775372A (en) 1973-07-12
DE2214032A1 (de) 1972-10-12
JPS5521208B1 (fr) 1980-06-07
FR2132013A1 (fr) 1972-11-17
AU460377B2 (en) 1975-04-24
SE374949B (fr) 1975-03-24
BE779391A (fr) 1972-08-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee