FR1207456A - Perfectionnements relatifs aux béliers hydrauliques et analogues - Google Patents

Perfectionnements relatifs aux béliers hydrauliques et analogues

Info

Publication number
FR1207456A
FR1207456A FR1207456DA FR1207456A FR 1207456 A FR1207456 A FR 1207456A FR 1207456D A FR1207456D A FR 1207456DA FR 1207456 A FR1207456 A FR 1207456A
Authority
FR
France
Prior art keywords
improvements relating
hydraulic rams
rams
hydraulic
relating
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
Other languages
English (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.)
Dobson Ltd W E & F
WE&F Dobson Ltd
Original Assignee
Dobson Ltd W E & F
WE&F Dobson Ltd
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 Dobson Ltd W E & F, WE&F Dobson Ltd filed Critical Dobson Ltd W E & F
Application granted granted Critical
Publication of FR1207456A publication Critical patent/FR1207456A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0069—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices without essential advancing shifting devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with advancing shifting devices connected therewith

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Fluid-Driven Valves (AREA)
FR1207456D 1957-06-11 1958-06-11 Perfectionnements relatifs aux béliers hydrauliques et analogues Expired FR1207456A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1832157A GB890644A (en) 1957-06-11 1957-06-11 Improvements in or relating to hydraulic jacks, pit props or the like

Publications (1)

Publication Number Publication Date
FR1207456A true FR1207456A (fr) 1960-02-17

Family

ID=10110475

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1207456D Expired FR1207456A (fr) 1957-06-11 1958-06-11 Perfectionnements relatifs aux béliers hydrauliques et analogues

Country Status (4)

Country Link
BE (1) BE568439A (fr)
DE (1) DE1211113B (fr)
FR (1) FR1207456A (fr)
GB (1) GB890644A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5275086A (en) * 1992-08-27 1994-01-04 Unlimited Solutions, Inc. Fluid actuator with internal pressure relief valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108862088B (zh) * 2018-08-21 2023-07-18 九江消防装备有限公司 一种电动撑顶器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE808785C (de) * 1948-10-02 1951-07-19 Hermann Wolf G M B H Verfahren und Form zur Herstellung von Kunststofformlingen mit Einlagen aus Metall o. dgl., beispielsweise von Brillen-Hakenbuegeln aus thermoplastischen Kunststoffen mit Drahteinlage
DE871585C (de) * 1950-01-17 1953-03-23 Edgar Tacke Hydraulischer Grubenstempel
DE918562C (de) * 1951-11-24 1954-09-30 Werner Sogalla Dr Ing Hydraulischer Grubenstempel
BE547272A (fr) * 1955-04-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5275086A (en) * 1992-08-27 1994-01-04 Unlimited Solutions, Inc. Fluid actuator with internal pressure relief valve
WO1994005916A1 (fr) * 1992-08-27 1994-03-17 Unlimited Solutions, Inc. Cylindre actionne par pression avec soupape de surete interne

Also Published As

Publication number Publication date
GB890644A (en) 1962-03-07
DE1211113B (de) 1966-02-24
BE568439A (fr)

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