GB242925A - Improvements in hydraulic lifting-jacks - Google Patents

Improvements in hydraulic lifting-jacks

Info

Publication number
GB242925A
GB242925A GB23097/25A GB2309725A GB242925A GB 242925 A GB242925 A GB 242925A GB 23097/25 A GB23097/25 A GB 23097/25A GB 2309725 A GB2309725 A GB 2309725A GB 242925 A GB242925 A GB 242925A
Authority
GB
United Kingdom
Prior art keywords
clutch element
pumps
casing
exhaust valve
jacks
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
GB23097/25A
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.)
Rohleder & Ehninger A G
Original Assignee
Rohleder & Ehninger A G
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 Rohleder & Ehninger A G filed Critical Rohleder & Ehninger A G
Publication of GB242925A publication Critical patent/GB242925A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

242,925. Rohleder & Ehninger Akt.- Gea. Dec. 13, 1924, [Convention date]. J a c k s . - Relates to hydraulic jacks of the kind in which the pumps g and the ram cylinder bare enclosed in a casing a and the pumps are operated and the exhaust valve l released by means of a hand lever r. To facilitate assembly, the shaft u of the handlever is provided with a clutch element s<2> which is automatically engaged with a clutch element s<1> on the assembled hydraulic apparatus when the latter is inserted through the bottom of the casing. The clutch element s<1> is mounted on the oscillating yoke n which actuates the pump plungers, and this yoke carries an adjustable striker q for actuating the exhaust valve l by a long stroke of the hand-lever.
GB23097/25A 1924-12-13 1925-09-16 Improvements in hydraulic lifting-jacks Expired GB242925A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE242925X 1924-12-13

Publications (1)

Publication Number Publication Date
GB242925A true GB242925A (en) 1925-11-19

Family

ID=5918342

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23097/25A Expired GB242925A (en) 1924-12-13 1925-09-16 Improvements in hydraulic lifting-jacks

Country Status (4)

Country Link
AT (1) AT104510B (en)
CH (1) CH115578A (en)
FR (1) FR603399A (en)
GB (1) GB242925A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594531A (en) * 1948-11-20 1952-04-29 Westinghouse Air Brake Co Automotive vehicle hoisting apparatus
US2672014A (en) * 1951-07-16 1954-03-16 Donald L Yarger Reciprocating hand pump and reservoir unit
US3464204A (en) * 1967-12-14 1969-09-02 Lake & Elliot Ltd Hydraulic lifting jack

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594531A (en) * 1948-11-20 1952-04-29 Westinghouse Air Brake Co Automotive vehicle hoisting apparatus
US2672014A (en) * 1951-07-16 1954-03-16 Donald L Yarger Reciprocating hand pump and reservoir unit
US3464204A (en) * 1967-12-14 1969-09-02 Lake & Elliot Ltd Hydraulic lifting jack

Also Published As

Publication number Publication date
CH115578A (en) 1926-07-01
AT104510B (en) 1926-10-25
FR603399A (en) 1926-04-14

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