FR1140137A - Adjustable prop device - Google Patents

Adjustable prop device

Info

Publication number
FR1140137A
FR1140137A FR1140137DA FR1140137A FR 1140137 A FR1140137 A FR 1140137A FR 1140137D A FR1140137D A FR 1140137DA FR 1140137 A FR1140137 A FR 1140137A
Authority
FR
France
Prior art keywords
prop device
adjustable prop
adjustable
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
Louis Desorbay
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 FR1140137A publication Critical patent/FR1140137A/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
    • E21D15/34—Telescopic props with parts held relatively to each other by friction or gripping by axially- moving balls, rollers, or the like

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)
FR1140137D 1956-01-09 1956-01-09 Adjustable prop device Expired FR1140137A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1140137T 1956-01-09

Publications (1)

Publication Number Publication Date
FR1140137A true FR1140137A (en) 1957-07-11

Family

ID=9642023

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1140137D Expired FR1140137A (en) 1956-01-09 1956-01-09 Adjustable prop device

Country Status (1)

Country Link
FR (1) FR1140137A (en)

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