FR980585A - Locking device for metal mine props - Google Patents

Locking device for metal mine props

Info

Publication number
FR980585A
FR980585A FR980585DA FR980585A FR 980585 A FR980585 A FR 980585A FR 980585D A FR980585D A FR 980585DA FR 980585 A FR980585 A FR 980585A
Authority
FR
France
Prior art keywords
locking device
metal mine
mine 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.)
SCHWARZ KG HERMANN
Hermann Schwarz KG
Original Assignee
SCHWARZ KG HERMANN
Hermann Schwarz KG
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 SCHWARZ KG HERMANN, Hermann Schwarz KG filed Critical SCHWARZ KG HERMANN
Application granted granted Critical
Publication of FR980585A publication Critical patent/FR980585A/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
    • E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction
FR980585D 1948-02-10 1949-02-10 Locking device for metal mine props Expired FR980585A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL980585X 1948-02-10

Publications (1)

Publication Number Publication Date
FR980585A true FR980585A (en) 1951-05-15

Family

ID=19866478

Family Applications (1)

Application Number Title Priority Date Filing Date
FR980585D Expired FR980585A (en) 1948-02-10 1949-02-10 Locking device for metal mine props

Country Status (1)

Country Link
FR (1) FR980585A (en)

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