BE557875A - - Google Patents

Info

Publication number
BE557875A
BE557875A BE557875DA BE557875A BE 557875 A BE557875 A BE 557875A BE 557875D A BE557875D A BE 557875DA BE 557875 A BE557875 A BE 557875A
Authority
BE
Belgium
Application number
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.)
Publication of BE557875A publication Critical patent/BE557875A/xx

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)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (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)
BE557875D 1956-05-28 BE557875A (xx)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE557875A true BE557875A (xx)

Family

ID=29554731

Family Applications (1)

Application Number Title Priority Date Filing Date
BE557875D BE557875A (xx) 1956-05-28

Country Status (4)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL264813A (xx) * 1960-05-21
DE1137406B (de) * 1960-06-30 1962-10-04 Kronprinz Ag Hydraulischer Grubenstempel
DE1231648B (de) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulisches Ausbauelement, insbesondere fuer den untertaegigen Grubenbetrieb

Also Published As

Publication number Publication date
DE1408060A1 (de) 1968-10-17
AT195874B (de) 1958-02-25
FR1175838A (fr) 1959-04-02

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