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FR849422A - étançon métallique - Google Patents

étançon métallique

Info

Publication number
FR849422A
FR849422A FR849422DA FR849422A FR 849422 A FR849422 A FR 849422A FR 849422D A FR849422D A FR 849422DA FR 849422 A FR849422 A FR 849422A
Authority
FR
France
Prior art keywords
metal prop
prop
metal
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
Edmond Galand
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 FR849422A publication Critical patent/FR849422A/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
    • E21D15/005—Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material
    • 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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements

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)
FR849422D 1938-02-03 1939-01-26 étançon métallique Expired FR849422A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE849422X 1938-02-03

Publications (1)

Publication Number Publication Date
FR849422A true FR849422A (fr) 1939-11-23

Family

ID=3882085

Family Applications (1)

Application Number Title Priority Date Filing Date
FR849422D Expired FR849422A (fr) 1938-02-03 1939-01-26 étançon métallique

Country Status (1)

Country Link
FR (1) FR849422A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1053453B (de) * 1956-02-10 1959-03-26 Maximilianshuette Eisenwerk Ausziehbarer Grubenstempel
DE1085121B (de) * 1955-02-26 1960-07-14 Hoesch Ag Druckmittelbetaetigter Grubenstempel
DE1085120B (de) * 1957-06-29 1960-07-14 Eickhoff Geb Schreitender Strebausbau fuer die flache Lagerung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1085121B (de) * 1955-02-26 1960-07-14 Hoesch Ag Druckmittelbetaetigter Grubenstempel
DE1053453B (de) * 1956-02-10 1959-03-26 Maximilianshuette Eisenwerk Ausziehbarer Grubenstempel
DE1085120B (de) * 1957-06-29 1960-07-14 Eickhoff Geb Schreitender Strebausbau fuer die flache Lagerung

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