FR948939A - iron prop - Google Patents

iron prop

Info

Publication number
FR948939A
FR948939A FR948939DA FR948939A FR 948939 A FR948939 A FR 948939A FR 948939D A FR948939D A FR 948939DA FR 948939 A FR948939 A FR 948939A
Authority
FR
France
Prior art keywords
iron prop
prop
iron
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
Otto Schloms
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 FR948939A publication Critical patent/FR948939A/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
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations

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)
FR948939D 1947-05-29 1947-05-29 iron prop Expired FR948939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR948939T 1947-05-29

Publications (1)

Publication Number Publication Date
FR948939A true FR948939A (en) 1949-08-16

Family

ID=9474328

Family Applications (1)

Application Number Title Priority Date Filing Date
FR948939D Expired FR948939A (en) 1947-05-29 1947-05-29 iron prop

Country Status (1)

Country Link
FR (1) FR948939A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765140A (en) * 1951-12-22 1956-10-02 Gerlach Karl Pit prop
DE977408C (en) * 1951-02-24 1966-05-26 Karl Gerlach Pit stamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977408C (en) * 1951-02-24 1966-05-26 Karl Gerlach Pit stamp
US2765140A (en) * 1951-12-22 1956-10-02 Gerlach Karl Pit prop

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