FR457567A - mine prop - Google Patents

mine prop

Info

Publication number
FR457567A
FR457567A FR457567DA FR457567A FR 457567 A FR457567 A FR 457567A FR 457567D A FR457567D A FR 457567DA FR 457567 A FR457567 A FR 457567A
Authority
FR
France
Prior art keywords
mine prop
prop
mine
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
Heinrich Heidkamp
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR457567A publication Critical patent/FR457567A/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
    • E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
    • E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring
FR457567D 1913-05-07 1913-05-07 mine prop Expired FR457567A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR457567T 1913-05-07

Publications (1)

Publication Number Publication Date
FR457567A true FR457567A (en) 1913-09-20

Family

ID=1497245

Family Applications (1)

Application Number Title Priority Date Filing Date
FR457567D Expired FR457567A (en) 1913-05-07 1913-05-07 mine prop

Country Status (1)

Country Link
FR (1) FR457567A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028496A1 (en) * 1979-11-02 1981-05-13 Mine Support Systems (Proprietary) Limited Timber prop
US4534531A (en) * 1980-07-22 1985-08-13 Brown Allan H G Elongated prop for supporting a load

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028496A1 (en) * 1979-11-02 1981-05-13 Mine Support Systems (Proprietary) Limited Timber prop
US4534531A (en) * 1980-07-22 1985-08-13 Brown Allan H G Elongated prop for supporting a load

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