GB892976A - Improvements relating to hydraulic pit-props or the like - Google Patents

Improvements relating to hydraulic pit-props or the like

Info

Publication number
GB892976A
GB892976A GB2608158A GB2608158A GB892976A GB 892976 A GB892976 A GB 892976A GB 2608158 A GB2608158 A GB 2608158A GB 2608158 A GB2608158 A GB 2608158A GB 892976 A GB892976 A GB 892976A
Authority
GB
United Kingdom
Prior art keywords
valve
props
improvements relating
hydraulic pit
aug
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
GB2608158A
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.)
Gutehoffnungshutte Sterkrade AG
Original Assignee
Gutehoffnungshutte Sterkrade AG
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 Gutehoffnungshutte Sterkrade AG filed Critical Gutehoffnungshutte Sterkrade AG
Publication of GB892976A publication Critical patent/GB892976A/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
    • E21D15/50—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)
GB2608158A 1957-08-13 1958-08-13 Improvements relating to hydraulic pit-props or the like Expired GB892976A (en)

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
GB892976A true GB892976A (en) 1962-04-04

Family

ID=7122021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2608158A Expired GB892976A (en) 1957-08-13 1958-08-13 Improvements relating to hydraulic pit-props or the like

Country Status (5)

Country Link
BE (1) BE570316A (it)
DE (1) DE1047737B (it)
FR (1) FR1201210A (it)
GB (1) GB892976A (it)
NL (1) NL230401A (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183012A (en) * 1985-11-15 1987-05-28 Hemscheidt Maschf Hermann A change-over valve for hydraulic walking mine-roof supports

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL248713A (it) * 1959-02-23
DE1231648B (de) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulisches Ausbauelement, insbesondere fuer den untertaegigen Grubenbetrieb
US4926902A (en) * 1988-01-18 1990-05-22 Diesel Kiki Co., Ltd. Pressure equalizer valve device of fuel injection pump
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 (it) * 1947-04-24 1950-09-06

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183012A (en) * 1985-11-15 1987-05-28 Hemscheidt Maschf Hermann A change-over valve for hydraulic walking mine-roof supports

Also Published As

Publication number Publication date
FR1201210A (fr) 1959-12-29
BE570316A (it)
NL230401A (it)
DE1047737B (de) 1958-12-31

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