GB1126725A - Hydraulic jack and piston valve member therefor - Google Patents

Hydraulic jack and piston valve member therefor

Info

Publication number
GB1126725A
GB1126725A GB52649/66A GB5264966A GB1126725A GB 1126725 A GB1126725 A GB 1126725A GB 52649/66 A GB52649/66 A GB 52649/66A GB 5264966 A GB5264966 A GB 5264966A GB 1126725 A GB1126725 A GB 1126725A
Authority
GB
United Kingdom
Prior art keywords
piston
stems
members
valve
hydraulic jack
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
GB52649/66A
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 GB1126725A publication Critical patent/GB1126725A/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
    • F15B15/225—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke with valve stems operated by contact with the piston end face or with the cylinder wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D49/00—Tractors
    • B62D49/04—Tractors modified to take pushing devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Actuator (AREA)

Abstract

1,126,725. Hydraulic jacks. CATERPILLAR. TRACTOR CO. 24 Nov., 1966 [27 Dec., 1965], No. 52649/66. Heading B8J. [Also in Division F1] In an hydraulic jack comprising a piston 23 and a cylinder 16, the piston contains a plurality of valve-members 27, 28 having stems slidingly lodged in sleeves 31, which include passages 35, to permit flow of working fluid from the highpressure side of the piston into exhaust conduits 36, 37 when the piston approaches the end of each stroke, the stems on at least one of the valve-members e.g. the stems 29, being longer than the stems on the other valve-member, or members, to effect earlier opening of the corresponding valve-member, or members, so that shock sustained by the piston is minimal. The sleeves 31 are retained in the piston by washers 33, 34 on a rod 20 attached to the piston, which rod is coupled to a pivotallysupported blade (11), Fig. 1 (not shown) in an earth-working machine (10).
GB52649/66A 1965-12-27 1966-11-24 Hydraulic jack and piston valve member therefor Expired GB1126725A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US516619A US3311026A (en) 1965-12-27 1965-12-27 Bypass valve for hydraulic jacks

Publications (1)

Publication Number Publication Date
GB1126725A true GB1126725A (en) 1968-09-11

Family

ID=24056386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52649/66A Expired GB1126725A (en) 1965-12-27 1966-11-24 Hydraulic jack and piston valve member therefor

Country Status (6)

Country Link
US (1) US3311026A (en)
BE (1) BE691819A (en)
DE (1) DE1279908B (en)
FR (1) FR1506058A (en)
GB (1) GB1126725A (en)
SE (1) SE304921B (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3515224A (en) * 1967-10-05 1970-06-02 Case Co J I Hydraulic cylinder control for bulldozer
DE2056066C3 (en) * 1970-11-14 1979-11-15 Daimler-Benz Ag, 7000 Stuttgart Disconnection device for the hydraulic auxiliary power in a power steering system for vehicles
JPS5733202Y2 (en) * 1975-02-12 1982-07-22
GB1536417A (en) * 1975-06-19 1978-12-20 Emhart Ind Cylinder and piston assemblies
US3991832A (en) * 1975-07-14 1976-11-16 Deere & Company Hydraulically tiltable and anglable dozer blade and mounting therefor
JPS5234393U (en) * 1975-08-30 1977-03-10
US4031967A (en) * 1976-06-14 1977-06-28 Caterpillar Tractor Co. Motor grader with spherical bearing mounting for blade tilt cylinders
US4060136A (en) * 1976-06-14 1977-11-29 Caterpillar Tractor Co. Motor grader blade mounting and tilt mechanism
DE2801296A1 (en) * 1978-01-13 1979-07-19 Massey Ferguson Hanomag Inc & DEVICE FOR CHANGING THE SETTING OF A PIVOT BLADE OF EARTHMOVING MACHINERY
JPS5673204A (en) * 1979-11-14 1981-06-17 Takara Isu Kogyo Kk Hydraulic driving apparatus
US4509409A (en) * 1983-02-07 1985-04-09 Towmotor Corporation Pump arrangement for a linear fluid operated device
FR2547290B1 (en) * 1983-06-07 1987-04-30 Rassant Sa Ets F HYDRAULIC JACK WITH IMPROVED TRAVEL LIMITER
DE3417447A1 (en) * 1984-05-11 1985-11-21 E.P.E. Budde GmbH, 5980 Werdohl Device for detecting the end positions of a hydraulic cylinder
EP0182927B1 (en) * 1984-11-26 1988-09-21 ETABLISSEMENTS F. Rassant S.A. Hydraulic jack with limited travel
US4860646A (en) * 1987-02-10 1989-08-29 Marathon Corporation Compactor with hydraulic dwell and method
US4825752A (en) * 1987-12-14 1989-05-02 Commercial Shearing, Inc. End-of-stroke bypass valve in piston for impact relief in hydraulic tilt and trim cylinder
DE202013001260U1 (en) 2013-02-12 2014-05-14 Bümach Engineering International B.V. Working cylinder with pressure medium overflow
WO2015050063A1 (en) 2014-09-26 2015-04-09 株式会社小松製作所 Cylinder with impact buffering function
CN107806457A (en) * 2016-09-08 2018-03-16 湖北江山液压科技有限公司 A kind of pressure release buffering hydraulic cylinder
WO2023147797A1 (en) 2022-02-04 2023-08-10 Bümach Engineering International B. V. Working cylinder with pressure medium overflow
DE202022000299U1 (en) 2022-02-04 2023-06-09 Bümach Enginneering International B.V. Working cylinder with pressure medium overflow

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US841527A (en) * 1904-10-11 1907-01-15 Joseph H Hoover Piston.
US1985361A (en) * 1931-06-01 1934-12-25 Anthony Co Hoist control
GB640414A (en) * 1948-03-06 1950-07-19 Mavor & Coulson Ltd Improvements in props
FR1062300A (en) * 1952-08-29 1954-04-21 Cylinder
US2752890A (en) * 1955-01-27 1956-07-03 Power Brake Parts Mfg Co Pneumatic actuator with automatic pressure unloading device
US2902007A (en) * 1957-05-31 1959-09-01 Allis Chalmers Mfg Co Cylinder piston assembly with pressure relieving means
US3182563A (en) * 1963-08-19 1965-05-11 Thompson Ramo Wooldridge Inc Hydraulic cylinder piston

Also Published As

Publication number Publication date
SE304921B (en) 1968-10-07
FR1506058A (en) 1967-12-15
BE691819A (en) 1967-06-27
US3311026A (en) 1967-03-28
DE1279908B (en) 1968-10-10

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