FR653399A - étais de mines et autres supports analogues - Google Patents

étais de mines et autres supports analogues

Info

Publication number
FR653399A
FR653399A FR653399DA FR653399A FR 653399 A FR653399 A FR 653399A FR 653399D A FR653399D A FR 653399DA FR 653399 A FR653399 A FR 653399A
Authority
FR
France
Prior art keywords
similar supports
mine props
props
mine
supports
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 Tait
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 FR653399A publication Critical patent/FR653399A/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
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations

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)
FR653399D 1927-06-10 1928-04-25 étais de mines et autres supports analogues Expired FR653399A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB653399X 1927-06-10

Publications (1)

Publication Number Publication Date
FR653399A true FR653399A (fr) 1929-03-20

Family

ID=10490328

Family Applications (1)

Application Number Title Priority Date Filing Date
FR653399D Expired FR653399A (fr) 1927-06-10 1928-04-25 étais de mines et autres supports analogues

Country Status (1)

Country Link
FR (1) FR653399A (fr)

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