FR1174801A - hydraulic prop for mines - Google Patents

hydraulic prop for mines

Info

Publication number
FR1174801A
FR1174801A FR1174801DA FR1174801A FR 1174801 A FR1174801 A FR 1174801A FR 1174801D A FR1174801D A FR 1174801DA FR 1174801 A FR1174801 A FR 1174801A
Authority
FR
France
Prior art keywords
mines
hydraulic prop
prop
hydraulic
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)
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.)
EWALD WIEMANN MASCHF
Original Assignee
EWALD WIEMANN MASCHF
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 EWALD WIEMANN MASCHF filed Critical EWALD WIEMANN MASCHF
Application granted granted Critical
Publication of FR1174801A publication Critical patent/FR1174801A/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
    • E21D15/14—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
    • 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
    • E21D15/512—Arrangement of valves
    • 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
    • E21D15/60—Devices for withdrawing props or chocks

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)
  • Check Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Fluid-Pressure Circuits (AREA)
FR1174801D 1956-05-03 1957-05-03 hydraulic prop for mines Expired FR1174801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM30421A DE1047150B (en) 1956-05-03 1956-05-03 Hydraulic pit ram

Publications (1)

Publication Number Publication Date
FR1174801A true FR1174801A (en) 1959-03-17

Family

ID=7300959

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1174801D Expired FR1174801A (en) 1956-05-03 1957-05-03 hydraulic prop for mines

Country Status (4)

Country Link
BE (1) BE557179A (en)
DE (1) DE1047150B (en)
FR (1) FR1174801A (en)
GB (1) GB845907A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231648B (en) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulic expansion element, especially for underground mining operations
DE1189938B (en) * 1962-08-31 1965-04-01 Kloeckner Werke Ag Hydraulic pit ram
US3154290A (en) * 1963-03-11 1964-10-27 William O Johnson Trailer-type hydraulic lift
BR7604063A (en) * 1975-08-13 1977-06-28 Kraftwerk Union Ag NUCLEAR REACTOR INSTALLATION

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE807083C (en) * 1950-03-07 1951-06-25 Josef Brand Hydraulic pit ram

Also Published As

Publication number Publication date
BE557179A (en)
GB845907A (en) 1960-08-24
DE1047150B (en) 1958-12-24

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