FR1009906A - two-piece steel mine prop - Google Patents

two-piece steel mine prop

Info

Publication number
FR1009906A
FR1009906A FR1009906DA FR1009906A FR 1009906 A FR1009906 A FR 1009906A FR 1009906D A FR1009906D A FR 1009906DA FR 1009906 A FR1009906 A FR 1009906A
Authority
FR
France
Prior art keywords
piece steel
mine prop
steel mine
prop
piece
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 FR1009906A publication Critical patent/FR1009906A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR1009906D 1948-07-08 1948-07-08 two-piece steel mine prop Expired FR1009906A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1009906T 1948-07-08

Publications (1)

Publication Number Publication Date
FR1009906A true FR1009906A (en) 1952-06-05

Family

ID=9568572

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1009906D Expired FR1009906A (en) 1948-07-08 1948-07-08 two-piece steel mine prop

Country Status (1)

Country Link
FR (1) FR1009906A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320703A (en) * 1964-08-26 1967-05-23 Collins Radio Co Device for raising or lowering antenna mast

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320703A (en) * 1964-08-26 1967-05-23 Collins Radio Co Device for raising or lowering antenna mast

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