FR1048983A - étançon en deux tronçons pour mines - Google Patents

étançon en deux tronçons pour mines

Info

Publication number
FR1048983A
FR1048983A FR1048983DA FR1048983A FR 1048983 A FR1048983 A FR 1048983A FR 1048983D A FR1048983D A FR 1048983DA FR 1048983 A FR1048983 A FR 1048983A
Authority
FR
France
Prior art keywords
mines
piece prop
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
English (en)
Inventor
Alexander Schubert
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 FR1048983A publication Critical patent/FR1048983A/fr
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
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
    • E21D15/26—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure

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)
FR1048983D 1951-01-19 1951-12-07 étançon en deux tronçons pour mines Expired FR1048983A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1048983X 1951-01-19

Publications (1)

Publication Number Publication Date
FR1048983A true FR1048983A (fr) 1953-12-28

Family

ID=7717264

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1048983D Expired FR1048983A (fr) 1951-01-19 1951-12-07 étançon en deux tronçons pour mines

Country Status (1)

Country Link
FR (1) FR1048983A (fr)

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