FR1140899A - Improvements to metal props in several elements - Google Patents

Improvements to metal props in several elements

Info

Publication number
FR1140899A
FR1140899A FR1140899DA FR1140899A FR 1140899 A FR1140899 A FR 1140899A FR 1140899D A FR1140899D A FR 1140899DA FR 1140899 A FR1140899 A FR 1140899A
Authority
FR
France
Prior art keywords
several elements
metal props
props
metal
several
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
Ludwig Vanwersch
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 FR1140899A publication Critical patent/FR1140899A/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
    • 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
    • E21D15/38—Telescopic props with parts held relatively to each other by friction or gripping with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations

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)
FR1140899D 1954-12-13 1955-12-07 Improvements to metal props in several elements Expired FR1140899A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1140899X 1954-12-13

Publications (1)

Publication Number Publication Date
FR1140899A true FR1140899A (en) 1957-08-20

Family

ID=7726555

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1140899D Expired FR1140899A (en) 1954-12-13 1955-12-07 Improvements to metal props in several elements

Country Status (1)

Country Link
FR (1) FR1140899A (en)

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