FR50799E - Effondreur de mines - Google Patents

Effondreur de mines

Info

Publication number
FR50799E
FR50799E FR50799DA FR50799E FR 50799 E FR50799 E FR 50799E FR 50799D A FR50799D A FR 50799DA FR 50799 E FR50799 E FR 50799E
Authority
FR
France
Prior art keywords
mine
collector
mine collector
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
English (en)
Inventor
Paul Perrin
Paul Loir
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 FR50799E publication Critical patent/FR50799E/fr
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
    • E21D15/60—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)
FR50799D 1939-11-03 1939-11-03 Effondreur de mines Expired FR50799E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR50799T 1939-11-03

Publications (1)

Publication Number Publication Date
FR50799E true FR50799E (fr) 1941-03-26

Family

ID=8685759

Family Applications (1)

Application Number Title Priority Date Filing Date
FR50799D Expired FR50799E (fr) 1939-11-03 1939-11-03 Effondreur de mines

Country Status (1)

Country Link
FR (1) FR50799E (fr)

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