FR52544E - iron prop for mine galleries - Google Patents

iron prop for mine galleries

Info

Publication number
FR52544E
FR52544E FR52544DA FR52544E FR 52544 E FR52544 E FR 52544E FR 52544D A FR52544D A FR 52544DA FR 52544 E FR52544 E FR 52544E
Authority
FR
France
Prior art keywords
iron prop
mine galleries
galleries
mine
prop
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
Arnold Koepe
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 FR52544E publication Critical patent/FR52544E/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
    • E21D15/502—Prop bodies characterised by their shape, e.g. of specified cross-section

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)
FR52544D 1942-09-30 1942-09-30 iron prop for mine galleries Expired FR52544E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR52544T 1942-09-30

Publications (1)

Publication Number Publication Date
FR52544E true FR52544E (en) 1945-04-17

Family

ID=8687194

Family Applications (1)

Application Number Title Priority Date Filing Date
FR52544D Expired FR52544E (en) 1942-09-30 1942-09-30 iron prop for mine galleries

Country Status (1)

Country Link
FR (1) FR52544E (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539833A (en) * 1994-10-24 1996-07-23 Yamashita; Osamu Audio signal amplifier device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539833A (en) * 1994-10-24 1996-07-23 Yamashita; Osamu Audio signal amplifier device

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