FR56237E - metal mine prop - Google Patents

metal mine prop

Info

Publication number
FR56237E
FR56237E FR56237DA FR56237E FR 56237 E FR56237 E FR 56237E FR 56237D A FR56237D A FR 56237DA FR 56237 E FR56237 E FR 56237E
Authority
FR
France
Prior art keywords
metal mine
mine prop
prop
metal
mine
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
Edmond Baily
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 FR56237E publication Critical patent/FR56237E/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
    • E21D15/40—Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted
FR56237D 1946-07-17 1946-07-17 metal mine prop Expired FR56237E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR56237T 1946-07-17

Publications (1)

Publication Number Publication Date
FR56237E true FR56237E (en) 1952-09-19

Family

ID=8690489

Family Applications (1)

Application Number Title Priority Date Filing Date
FR56237D Expired FR56237E (en) 1946-07-17 1946-07-17 metal mine prop

Country Status (1)

Country Link
FR (1) FR56237E (en)

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