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FR1420839A - hydraulic prop for mines - Google Patents

hydraulic prop for mines

Info

Publication number
FR1420839A
FR1420839A FR1474A FR1474A FR1420839A FR 1420839 A FR1420839 A FR 1420839A FR 1474 A FR1474 A FR 1474A FR 1474 A FR1474 A FR 1474A FR 1420839 A FR1420839 A FR 1420839A
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
FR1474A
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.)
Bochumer Eisenhuette Heintzmann GmbH and Co KG
Original Assignee
Bochumer Eisenhuette Heintzmann GmbH and Co KG
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
Priority claimed from DEB75240A external-priority patent/DE1230744B/en
Application filed by Bochumer Eisenhuette Heintzmann GmbH and Co KG filed Critical Bochumer Eisenhuette Heintzmann GmbH and Co KG
Priority to FR1474A priority Critical patent/FR1420839A/en
Application granted granted Critical
Publication of FR1420839A publication Critical patent/FR1420839A/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
    • E21D15/515—Particular fluids not covered by any chemical subdivision
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
    • F16J10/02—Cylinders designed to receive moving pistons or plungers

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)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
FR1474A 1964-01-31 1965-01-11 hydraulic prop for mines Expired FR1420839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1474A FR1420839A (en) 1964-01-31 1965-01-11 hydraulic prop for mines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEB75240A DE1230744B (en) 1964-01-31 1964-01-31 Hydraulic pit ram
FR1474A FR1420839A (en) 1964-01-31 1965-01-11 hydraulic prop for mines

Publications (1)

Publication Number Publication Date
FR1420839A true FR1420839A (en) 1965-12-10

Family

ID=25966945

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1474A Expired FR1420839A (en) 1964-01-31 1965-01-11 hydraulic prop for mines

Country Status (1)

Country Link
FR (1) FR1420839A (en)

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