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FR1175838A - Improvements made to mine props, hydraulic - Google Patents

Improvements made to mine props, hydraulic

Info

Publication number
FR1175838A
FR1175838A FR1175838DA FR1175838A FR 1175838 A FR1175838 A FR 1175838A FR 1175838D A FR1175838D A FR 1175838DA FR 1175838 A FR1175838 A FR 1175838A
Authority
FR
France
Prior art keywords
hydraulic
improvements made
mine props
props
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
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.)
SAARLAEND GRUBENAUSBAU
Original Assignee
SAARLAEND 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 SAARLAEND GRUBENAUSBAU filed Critical SAARLAEND GRUBENAUSBAU
Application granted granted Critical
Publication of FR1175838A publication Critical patent/FR1175838A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Details Of Reciprocating Pumps (AREA)
FR1175838D 1956-05-28 1957-05-28 Improvements made to mine props, hydraulic Expired FR1175838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT195874T 1956-05-28

Publications (1)

Publication Number Publication Date
FR1175838A true FR1175838A (en) 1959-04-02

Family

ID=29554731

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1175838D Expired FR1175838A (en) 1956-05-28 1957-05-28 Improvements made to mine props, hydraulic

Country Status (4)

Country Link
AT (1) AT195874B (en)
BE (1) BE557875A (en)
DE (1) DE1408060A1 (en)
FR (1) FR1175838A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL264813A (en) * 1960-05-21
DE1137406B (en) * 1960-06-30 1962-10-04 Kronprinz Ag Hydraulic pit ram
DE1231648B (en) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulic expansion element, especially for underground mining operations

Also Published As

Publication number Publication date
BE557875A (en)
AT195874B (en) 1958-02-25
DE1408060A1 (en) 1968-10-17

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