FR52746E - Iron pole for mines - Google Patents

Iron pole for mines

Info

Publication number
FR52746E
FR52746E FR52746DA FR52746E FR 52746 E FR52746 E FR 52746E FR 52746D A FR52746D A FR 52746DA FR 52746 E FR52746 E FR 52746E
Authority
FR
France
Prior art keywords
mines
iron pole
pole
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
Arnold Koepe
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 FR52746E publication Critical patent/FR52746E/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)
FR52746D 1943-02-09 1943-02-09 Iron pole for mines Expired FR52746E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR52746T 1943-02-09

Publications (1)

Publication Number Publication Date
FR52746E true FR52746E (en) 1945-05-17

Family

ID=8687377

Family Applications (1)

Application Number Title Priority Date Filing Date
FR52746D Expired FR52746E (en) 1943-02-09 1943-02-09 Iron pole for mines

Country Status (1)

Country Link
FR (1) FR52746E (en)

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