FR1207204A - Hydraulic jack and its applications to mine props - Google Patents

Hydraulic jack and its applications to mine props

Info

Publication number
FR1207204A
FR1207204A FR1207204DA FR1207204A FR 1207204 A FR1207204 A FR 1207204A FR 1207204D A FR1207204D A FR 1207204DA FR 1207204 A FR1207204 A FR 1207204A
Authority
FR
France
Prior art keywords
applications
hydraulic jack
mine props
props
mine
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
French (fr)
Inventor
Oskar Noe
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 filed Critical
Application granted granted Critical
Publication of FR1207204A publication Critical patent/FR1207204A/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
    • E21D15/515—Particular fluids not covered by any chemical subdivision
    • 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
    • E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
    • E21D15/155—Built-in cleaning devices
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Fluid-Damping Devices (AREA)
  • Actuator (AREA)
FR1207204D 1957-10-25 1958-10-10 Hydraulic jack and its applications to mine props Expired FR1207204A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN14244A DE1224684B (en) 1957-10-25 1957-10-25 Hydraulic pit ram

Publications (1)

Publication Number Publication Date
FR1207204A true FR1207204A (en) 1960-02-15

Family

ID=7339843

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1207204D Expired FR1207204A (en) 1957-10-25 1958-10-10 Hydraulic jack and its applications to mine props

Country Status (4)

Country Link
BE (1) BE572255A (en)
DE (1) DE1224684B (en)
FR (1) FR1207204A (en)
GB (1) GB877345A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357859A (en) * 1981-04-08 1982-11-09 United Technologies Corporation Pressure sensor
IT8223222V0 (en) * 1982-10-18 1982-10-18 Giovanni Trevisan GUIDE DEVICE FOR PISTONS OF FLUID DYNAMIC ACTUATORS, PARTICULARLY OF THE ROTATING TYPE WITH TWO COAXIAL PISTONS, EQUIPPED WITH RACKS.
CN113605941A (en) * 2021-08-04 2021-11-05 陈立伟 Single screw prop

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE899483C (en) * 1953-11-05 Eisenwerk Wanheim G.M.B.H., Duisburg-Wanheim Iron pit stamp
DE1009137B (en) * 1955-12-14 1957-05-29 Hermann Schwarz K G Hydraulic pit ram with tubular inner and outer part
BE560360A (en) * 1956-08-29

Also Published As

Publication number Publication date
DE1224684B (en) 1966-09-15
GB877345A (en) 1961-09-13
BE572255A (en) 1958-11-14

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