FR1075870A - Device for unlocking telescopic props and props - Google Patents

Device for unlocking telescopic props and props

Info

Publication number
FR1075870A
FR1075870A FR1075870DA FR1075870A FR 1075870 A FR1075870 A FR 1075870A FR 1075870D A FR1075870D A FR 1075870DA FR 1075870 A FR1075870 A FR 1075870A
Authority
FR
France
Prior art keywords
props
unlocking
unlocking telescopic
telescopic
telescopic props
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
Jean-Marc Breschard
Michel Breschard
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 FR1075870A publication Critical patent/FR1075870A/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
    • E21D15/60—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)
FR1075870D 1953-04-15 1953-04-15 Device for unlocking telescopic props and props Expired FR1075870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1075870T 1953-04-15

Publications (1)

Publication Number Publication Date
FR1075870A true FR1075870A (en) 1954-10-20

Family

ID=9607371

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1075870D Expired FR1075870A (en) 1953-04-15 1953-04-15 Device for unlocking telescopic props and props

Country Status (1)

Country Link
FR (1) FR1075870A (en)

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