FR942844A - metal props for mining - Google Patents

metal props for mining

Info

Publication number
FR942844A
FR942844A FR942844DA FR942844A FR 942844 A FR942844 A FR 942844A FR 942844D A FR942844D A FR 942844DA FR 942844 A FR942844 A FR 942844A
Authority
FR
France
Prior art keywords
mining
metal 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)
Inventor
Alexander Schmidt
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 FR942844A publication Critical patent/FR942844A/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
    • E21D15/36—Telescopic props with parts held relatively to each other by friction or gripping by a tiltable collar surrounding one or both parts

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)
FR942844D 1946-08-10 1946-08-10 metal props for mining Expired FR942844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR942844T 1946-08-10

Publications (1)

Publication Number Publication Date
FR942844A true FR942844A (en) 1949-02-18

Family

ID=9471047

Family Applications (1)

Application Number Title Priority Date Filing Date
FR942844D Expired FR942844A (en) 1946-08-10 1946-08-10 metal props for mining

Country Status (1)

Country Link
FR (1) FR942844A (en)

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