FR989336A - étançon de mine hydraulique - Google Patents

étançon de mine hydraulique

Info

Publication number
FR989336A
FR989336A FR989336DA FR989336A FR 989336 A FR989336 A FR 989336A FR 989336D A FR989336D A FR 989336DA FR 989336 A FR989336 A FR 989336A
Authority
FR
France
Prior art keywords
mine prop
hydraulic mine
hydraulic
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)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia GmbH
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 by Gewerkschaft Eisenhutte Westfalia GmbH filed Critical Gewerkschaft Eisenhutte Westfalia GmbH
Application granted granted Critical
Publication of FR989336A publication Critical patent/FR989336A/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
    • E21D15/50—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)
FR989336D 1949-04-25 1949-04-25 étançon de mine hydraulique Expired FR989336A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR989336T 1949-04-25

Publications (1)

Publication Number Publication Date
FR989336A true FR989336A (fr) 1951-09-07

Family

ID=9540173

Family Applications (1)

Application Number Title Priority Date Filing Date
FR989336D Expired FR989336A (fr) 1949-04-25 1949-04-25 étançon de mine hydraulique

Country Status (1)

Country Link
FR (1) FR989336A (fr)

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