FR1173246A - Improvements to hydraulic props for mines - Google Patents

Improvements to hydraulic props for mines

Info

Publication number
FR1173246A
FR1173246A FR1173246DA FR1173246A FR 1173246 A FR1173246 A FR 1173246A FR 1173246D A FR1173246D A FR 1173246DA FR 1173246 A FR1173246 A FR 1173246A
Authority
FR
France
Prior art keywords
mines
hydraulic props
props
hydraulic
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
French (fr)
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.)
BOCHUMER GES fur GRUBENAUSBAU
Original Assignee
BOCHUMER GES fur GRUBENAUSBAU
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 BOCHUMER GES fur GRUBENAUSBAU filed Critical BOCHUMER GES fur GRUBENAUSBAU
Application granted granted Critical
Publication of FR1173246A publication Critical patent/FR1173246A/en
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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators

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)
  • Valves And Accessory Devices For Braking Systems (AREA)
FR1173246D 1956-03-19 1957-03-18 Improvements to hydraulic props for mines Expired FR1173246A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT859878X 1956-03-19

Publications (1)

Publication Number Publication Date
FR1173246A true FR1173246A (en) 1959-02-23

Family

ID=3682329

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1173246D Expired FR1173246A (en) 1956-03-19 1957-03-18 Improvements to hydraulic props for mines

Country Status (3)

Country Link
BE (1) BE555935A (en)
FR (1) FR1173246A (en)
GB (1) GB859878A (en)

Also Published As

Publication number Publication date
GB859878A (en) 1961-01-25
BE555935A (en)

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