FR1060753A - Pit prop - Google Patents

Pit prop

Info

Publication number
FR1060753A
FR1060753A FR1060753DA FR1060753A FR 1060753 A FR1060753 A FR 1060753A FR 1060753D A FR1060753D A FR 1060753DA FR 1060753 A FR1060753 A FR 1060753A
Authority
FR
France
Prior art keywords
pit prop
prop
pit
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
Alexander Schubert
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 FR1060753A publication Critical patent/FR1060753A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D15/40—Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted
FR1060753D 1948-06-11 1948-06-11 Pit prop Expired FR1060753A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1060753T 1948-06-11

Publications (1)

Publication Number Publication Date
FR1060753A true FR1060753A (en) 1954-04-06

Family

ID=9599805

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1060753D Expired FR1060753A (en) 1948-06-11 1948-06-11 Pit prop

Country Status (1)

Country Link
FR (1) FR1060753A (en)

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