FR75374E - mine prop - Google Patents

mine prop

Info

Publication number
FR75374E
FR75374E FR789984A FR789984A FR75374E FR 75374 E FR75374 E FR 75374E FR 789984 A FR789984 A FR 789984A FR 789984 A FR789984 A FR 789984A FR 75374 E FR75374 E FR 75374E
Authority
FR
France
Prior art keywords
mine prop
prop
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
FR789984A
Other languages
French (fr)
Inventor
Karl Gerlach
Hans Gerlach
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
Priority to FR789984A priority Critical patent/FR75374E/en
Application granted granted Critical
Publication of FR75374E publication Critical patent/FR75374E/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
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction
    • 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
    • E21D15/005—Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material

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)
FR789984A 1959-03-20 1959-03-20 mine prop Expired FR75374E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR789984A FR75374E (en) 1959-03-20 1959-03-20 mine prop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR789984A FR75374E (en) 1959-03-20 1959-03-20 mine prop

Publications (1)

Publication Number Publication Date
FR75374E true FR75374E (en) 1961-06-09

Family

ID=8712757

Family Applications (1)

Application Number Title Priority Date Filing Date
FR789984A Expired FR75374E (en) 1959-03-20 1959-03-20 mine prop

Country Status (1)

Country Link
FR (1) FR75374E (en)

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