FR923079A - Improvement in metal props - Google Patents

Improvement in metal props

Info

Publication number
FR923079A
FR923079A FR923079DA FR923079A FR 923079 A FR923079 A FR 923079A FR 923079D A FR923079D A FR 923079DA FR 923079 A FR923079 A FR 923079A
Authority
FR
France
Prior art keywords
improvement
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)
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.)
Const Metalliques & Forges De
Original Assignee
Const Metalliques & Forges De
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 Const Metalliques & Forges De filed Critical Const Metalliques & Forges De
Application granted granted Critical
Publication of FR923079A publication Critical patent/FR923079A/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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge
FR923079D 1946-03-01 1946-03-01 Improvement in metal props Expired FR923079A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR923079T 1946-03-01

Publications (1)

Publication Number Publication Date
FR923079A true FR923079A (en) 1947-06-26

Family

ID=9438437

Family Applications (1)

Application Number Title Priority Date Filing Date
FR923079D Expired FR923079A (en) 1946-03-01 1946-03-01 Improvement in metal props

Country Status (1)

Country Link
FR (1) FR923079A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723100A (en) * 1951-04-13 1955-11-08 Muschamp Norman James Releasable supports for roofs in underground mines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723100A (en) * 1951-04-13 1955-11-08 Muschamp Norman James Releasable supports for roofs in underground mines

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