NL230401A - - Google Patents

Info

Publication number
NL230401A
NL230401A NL230401DA NL230401A NL 230401 A NL230401 A NL 230401A NL 230401D A NL230401D A NL 230401DA NL 230401 A NL230401 A NL 230401A
Authority
NL
Netherlands
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 NL230401A publication Critical patent/NL230401A/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
    • E21D15/50—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
    • E21D15/512—Arrangement of valves
    • 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
    • F16K17/168—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side combined with manually-controlled valves, e.g. a valve combined with a safety valve
    • 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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float

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)
  • Safety Valves (AREA)
  • Check Valves (AREA)
NL230401D 1957-08-13 NL230401A (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG22747A DE1047737B (de) 1957-08-13 1957-08-13 Hydraulischer Grubenstempel und aehnliche Stuetzvorrichtung

Publications (1)

Publication Number Publication Date
NL230401A true NL230401A (en:Method)

Family

ID=7122021

Family Applications (1)

Application Number Title Priority Date Filing Date
NL230401D NL230401A (en:Method) 1957-08-13

Country Status (5)

Country Link
BE (1) BE570316A (en:Method)
DE (1) DE1047737B (en:Method)
FR (1) FR1201210A (en:Method)
GB (1) GB892976A (en:Method)
NL (1) NL230401A (en:Method)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL248713A (en:Method) * 1959-02-23
DE1231648B (de) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulisches Ausbauelement, insbesondere fuer den untertaegigen Grubenbetrieb
DE3540531C1 (de) * 1985-11-15 1987-01-08 Hemscheidt Maschf Hermann Wechselventil fuer hydraulischen Schreitausbau
EP0325211B1 (en) * 1988-01-18 1994-06-22 Diesel Kiki Co., Ltd. Pressure equalizer valve device
FR3046463A1 (fr) 2015-12-30 2017-07-07 Dominique Lestelle Dispositif de mesure resistive de l'humidite d'un materiau mineral poreux, et application au monitoring hydrique des plantes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR965222A (en:Method) * 1947-04-24 1950-09-06

Also Published As

Publication number Publication date
DE1047737B (de) 1958-12-31
BE570316A (en:Method)
GB892976A (en) 1962-04-04
FR1201210A (fr) 1959-12-29

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