FR973825A - Clamping device for prop - Google Patents

Clamping device for prop

Info

Publication number
FR973825A
FR973825A FR973825DA FR973825A FR 973825 A FR973825 A FR 973825A FR 973825D A FR973825D A FR 973825DA FR 973825 A FR973825 A FR 973825A
Authority
FR
France
Prior art keywords
prop
clamping device
clamping
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
August Heinrich Pagels
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 FR973825A publication Critical patent/FR973825A/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)
FR973825D 1948-10-19 1948-10-19 Clamping device for prop Expired FR973825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR973825T 1948-10-19

Publications (1)

Publication Number Publication Date
FR973825A true FR973825A (en) 1951-02-15

Family

ID=9517025

Family Applications (1)

Application Number Title Priority Date Filing Date
FR973825D Expired FR973825A (en) 1948-10-19 1948-10-19 Clamping device for prop

Country Status (1)

Country Link
FR (1) FR973825A (en)

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