FR29211E - Système d'étançon - Google Patents

Système d'étançon

Info

Publication number
FR29211E
FR29211E FR29211DA FR29211E FR 29211 E FR29211 E FR 29211E FR 29211D A FR29211D A FR 29211DA FR 29211 E FR29211 E FR 29211E
Authority
FR
France
Prior art keywords
support system
support
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
Charles-Leonard Pelabon
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 FR29211E publication Critical patent/FR29211E/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
    • E21D15/28—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)
FR29211D 1924-08-08 1924-08-08 Système d'étançon Expired FR29211E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR29211T 1924-08-08

Publications (1)

Publication Number Publication Date
FR29211E true FR29211E (fr) 1925-07-09

Family

ID=8667260

Family Applications (1)

Application Number Title Priority Date Filing Date
FR29211D Expired FR29211E (fr) 1924-08-08 1924-08-08 Système d'étançon

Country Status (1)

Country Link
FR (1) FR29211E (fr)

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