FR71197E - étançon de mine - Google Patents

étançon de mine

Info

Publication number
FR71197E
FR71197E FR71197DA FR71197E FR 71197 E FR71197 E FR 71197E FR 71197D A FR71197D A FR 71197DA FR 71197 E FR71197 E FR 71197E
Authority
FR
France
Prior art keywords
mine prop
prop
mine
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
Karl Gerlach
Hans Gerlach
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 FR71197E publication Critical patent/FR71197E/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
    • E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction

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)
FR71197D 1957-04-13 1957-04-13 étançon de mine Expired FR71197E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR71197T 1957-04-13

Publications (1)

Publication Number Publication Date
FR71197E true FR71197E (fr) 1959-10-13

Family

ID=8702808

Family Applications (1)

Application Number Title Priority Date Filing Date
FR71197D Expired FR71197E (fr) 1957-04-13 1957-04-13 étançon de mine

Country Status (1)

Country Link
FR (1) FR71197E (fr)

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