GB2049051A - Cushioning device for fluid jacks - Google Patents

Cushioning device for fluid jacks

Info

Publication number
GB2049051A
GB2049051A GB8016178A GB8016178A GB2049051A GB 2049051 A GB2049051 A GB 2049051A GB 8016178 A GB8016178 A GB 8016178A GB 8016178 A GB8016178 A GB 8016178A GB 2049051 A GB2049051 A GB 2049051A
Authority
GB
United Kingdom
Prior art keywords
cushioning device
fluid
variable volume
volume chamber
cushioning
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.)
Granted
Application number
GB8016178A
Other versions
GB2049051B (en
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 GB2049051A publication Critical patent/GB2049051A/en
Application granted granted Critical
Publication of GB2049051B publication Critical patent/GB2049051B/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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke

Abstract

A fluid jack (10) has a cushioning device (21) positioned within a cylinder (11) between a piston means (12) and a closed end (13) with the cushioning device (21) being a self-contained unit independent of any major components of the fluid jack (10). A variable volume chamber (24) is formed between a pair of members (22, 23) with the cushioning taking place by metering the fluid expelled from the variable volume chamber (24) in response to the piston means (12) engaging and moving one of the members (22, 23) in a direction for decreasing the volume of the variable volume chamber (24).
GB8016178A 1978-11-20 1978-11-20 Cushioning device for fluid jacks Expired GB2049051B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1978/000169 WO1980001097A1 (en) 1978-11-20 1978-11-20 Cushioning device for fluid jacks

Publications (2)

Publication Number Publication Date
GB2049051A true GB2049051A (en) 1980-12-17
GB2049051B GB2049051B (en) 1982-12-15

Family

ID=22141282

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8016178A Expired GB2049051B (en) 1978-11-20 1978-11-20 Cushioning device for fluid jacks

Country Status (3)

Country Link
JP (1) JPS55500916A (en)
GB (1) GB2049051B (en)
WO (1) WO1980001097A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322912A (en) * 1997-03-03 1998-09-09 Caterpillar Inc Hydraulic cylinder

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935051A (en) * 1958-05-28 1960-05-03 Curtiss Wright Corp Fluid operated reciprocating motors
US3162092A (en) * 1962-07-09 1964-12-22 Tomkins Johnson Company Cylinder cushion structure
US3608437A (en) * 1969-12-30 1971-09-28 Case Co J I Cushioning device for hydraulic motor
US3877344A (en) * 1973-03-02 1975-04-15 Allis Chalmers Cushioned hydraulic actuator
US4043254A (en) * 1974-12-03 1977-08-23 Emhart Industries, Inc. Apparatus for cushioning the motion of a reciprocating member
FI56060C (en) * 1976-02-23 1979-11-12 Rauma Repola Oy SLUTSTAELLNINGSDAEMPARE VID HYDRAULCYLINDER
US4065112A (en) * 1976-08-23 1977-12-27 Towmotor Corporation Hydraulic jack cushioning apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322912A (en) * 1997-03-03 1998-09-09 Caterpillar Inc Hydraulic cylinder
GB2322912B (en) * 1997-03-03 2000-11-01 Caterpillar Inc Hydraulic cylinder

Also Published As

Publication number Publication date
WO1980001097A1 (en) 1980-05-29
JPS55500916A (en) 1980-11-06
GB2049051B (en) 1982-12-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee