FR1131418A - metal prop adjustable by jack - Google Patents

metal prop adjustable by jack

Info

Publication number
FR1131418A
FR1131418A FR1131418DA FR1131418A FR 1131418 A FR1131418 A FR 1131418A FR 1131418D A FR1131418D A FR 1131418DA FR 1131418 A FR1131418 A FR 1131418A
Authority
FR
France
Prior art keywords
jack
adjustable
metal prop
metal
prop adjustable
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
Thomas
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 FR1131418A publication Critical patent/FR1131418A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
    • B66F1/02—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
    • 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
    • E04G25/08—Shores or struts; Chocks telescopic with parts held relatively to each other by friction or gripping
    • 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
FR1131418D 1954-09-23 1954-09-23 metal prop adjustable by jack Expired FR1131418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1131418T 1954-09-23

Publications (1)

Publication Number Publication Date
FR1131418A true FR1131418A (en) 1957-02-21

Family

ID=9637894

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1131418D Expired FR1131418A (en) 1954-09-23 1954-09-23 metal prop adjustable by jack

Country Status (1)

Country Link
FR (1) FR1131418A (en)

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