FR68541E - étai télescopique - Google Patents

étai télescopique

Info

Publication number
FR68541E
FR68541E FR68541DA FR68541E FR 68541 E FR68541 E FR 68541E FR 68541D A FR68541D A FR 68541DA FR 68541 E FR68541 E FR 68541E
Authority
FR
France
Prior art keywords
telescopic prop
prop
telescopic
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
Nicolas-Joseph Rutigliano
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 FR68541E publication Critical patent/FR68541E/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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/581—Devices for setting props or chocks in which the props are pre- loaded
    • 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
    • E21D15/20—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals

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)
FR68541D 1955-11-08 1955-11-08 étai télescopique Expired FR68541E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR68541T 1955-11-08

Publications (1)

Publication Number Publication Date
FR68541E true FR68541E (fr) 1958-05-02

Family

ID=8700571

Family Applications (1)

Application Number Title Priority Date Filing Date
FR68541D Expired FR68541E (fr) 1955-11-08 1955-11-08 étai télescopique

Country Status (1)

Country Link
FR (1) FR68541E (fr)

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