FR954897A - - Google Patents

Info

Publication number
FR954897A
FR954897A FR954897DA FR954897A FR 954897 A FR954897 A FR 954897A FR 954897D A FR954897D A FR 954897DA FR 954897 A FR954897 A FR 954897A
Authority
FR
France
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
French (fr)
Publication date
Application granted granted Critical
Publication of FR954897A publication Critical patent/FR954897A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/0213—Assembling devices for pivoting caps upwardly

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR954897D Expired FR954897A (cg-RX-API-DMAC7.html)

Publications (1)

Publication Number Publication Date
FR954897A true FR954897A (cg-RX-API-DMAC7.html) 1950-01-06

Family

ID=1557725

Family Applications (1)

Application Number Title Priority Date Filing Date
FR954897D Expired FR954897A (cg-RX-API-DMAC7.html)

Country Status (1)

Country Link
FR (1) FR954897A (cg-RX-API-DMAC7.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115754A (en) * 1959-01-23 1963-12-31 Dowty Mining Equipment Ltd Mining shield

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115754A (en) * 1959-01-23 1963-12-31 Dowty Mining Equipment Ltd Mining shield

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