FR1007950A - Improvements made to metal props - Google Patents

Improvements made to metal props

Info

Publication number
FR1007950A
FR1007950A FR1007950DA FR1007950A FR 1007950 A FR1007950 A FR 1007950A FR 1007950D A FR1007950D A FR 1007950DA FR 1007950 A FR1007950 A FR 1007950A
Authority
FR
France
Prior art keywords
improvements made
metal props
props
metal
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
Andre-Jacques Schoeller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
E DERVAUX ETS
Original Assignee
E DERVAUX ETS
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 by E DERVAUX ETS filed Critical E DERVAUX ETS
Application granted granted Critical
Publication of FR1007950A publication Critical patent/FR1007950A/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
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
FR1007950D 1948-04-19 1948-04-19 Improvements made to metal props Expired FR1007950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1007950T 1948-04-19

Publications (1)

Publication Number Publication Date
FR1007950A true FR1007950A (en) 1952-05-12

Family

ID=9567009

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1007950D Expired FR1007950A (en) 1948-04-19 1948-04-19 Improvements made to metal props

Country Status (1)

Country Link
FR (1) FR1007950A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166124B (en) * 1954-06-12 1964-03-26 Mannesmann Ag Wedge, especially cross wedge, for metal pit punches

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166124B (en) * 1954-06-12 1964-03-26 Mannesmann Ag Wedge, especially cross wedge, for metal pit punches

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