BE568439A - - Google Patents

Info

Publication number
BE568439A
BE568439A BE568439DA BE568439A BE 568439 A BE568439 A BE 568439A BE 568439D A BE568439D A BE 568439DA BE 568439 A BE568439 A BE 568439A
Authority
BE
Belgium
Application number
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.)
Publication of BE568439A publication Critical patent/BE568439A/xx

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)
  • Fluid-Driven Valves (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
BE568439D 1957-06-11 BE568439A (de)

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
BE568439A true BE568439A (de)

Family

ID=10110475

Family Applications (1)

Application Number Title Priority Date Filing Date
BE568439D BE568439A (de) 1957-06-11

Country Status (4)

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

Families Citing this family (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
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
LU34334A1 (de) * 1955-04-25

Also Published As

Publication number Publication date
FR1207456A (fr) 1960-02-17
DE1211113B (de) 1966-02-24
GB890644A (en) 1962-03-07

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