FR923214A - Extension device for mine props - Google Patents

Extension device for mine props

Info

Publication number
FR923214A
FR923214A FR923214DA FR923214A FR 923214 A FR923214 A FR 923214A FR 923214D A FR923214D A FR 923214DA FR 923214 A FR923214 A FR 923214A
Authority
FR
France
Prior art keywords
extension device
mine props
props
mine
extension
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 Sabes
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 FR923214A publication Critical patent/FR923214A/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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/581—Devices for setting props or chocks in which the props are pre- loaded
FR923214D 1946-01-25 1946-01-25 Extension device for mine props Expired FR923214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR923214T 1946-01-25

Publications (1)

Publication Number Publication Date
FR923214A true FR923214A (en) 1947-07-01

Family

ID=9438554

Family Applications (1)

Application Number Title Priority Date Filing Date
FR923214D Expired FR923214A (en) 1946-01-25 1946-01-25 Extension device for mine props

Country Status (1)

Country Link
FR (1) FR923214A (en)

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