GB876990A - Hydraulic pit-props and other like support elements and relief valves therefor - Google Patents

Hydraulic pit-props and other like support elements and relief valves therefor

Info

Publication number
GB876990A
GB876990A GB963358A GB963358A GB876990A GB 876990 A GB876990 A GB 876990A GB 963358 A GB963358 A GB 963358A GB 963358 A GB963358 A GB 963358A GB 876990 A GB876990 A GB 876990A
Authority
GB
United Kingdom
Prior art keywords
valve
prop
pressure
props
support elements
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
GB963358A
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.)
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
Original Assignee
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
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 EBERHARD VON CAMPENHAUSEN, WILLY EGGEMANN filed Critical EBERHARD VON CAMPENHAUSEN
Publication of GB876990A publication Critical patent/GB876990A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • F16K17/044—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 more than one spring

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)
GB963358A 1957-04-03 1958-03-26 Hydraulic pit-props and other like support elements and relief valves therefor Expired GB876990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH21864A DE1038505B (de) 1957-04-03 1957-04-03 UEberdruckventil, insbesondere fuer mehrteilige Stuetzelemente des Grubenausbaus

Publications (1)

Publication Number Publication Date
GB876990A true GB876990A (en) 1961-09-06

Family

ID=7429169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB963358A Expired GB876990A (en) 1957-04-03 1958-03-26 Hydraulic pit-props and other like support elements and relief valves therefor

Country Status (4)

Country Link
BE (1) BE565731A (enrdf_load_stackoverflow)
DE (1) DE1038505B (enrdf_load_stackoverflow)
GB (1) GB876990A (enrdf_load_stackoverflow)
NL (1) NL226166A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444392A (en) * 2006-11-28 2008-06-04 Bifold Fluidpower Ltd Fluid flow control apparatus
CN111239058A (zh) * 2020-02-24 2020-06-05 深圳九星印刷包装集团有限公司 指示装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3476142A (en) * 1966-09-16 1969-11-04 Eaton Yale & Towne Multiple check valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE928945C (de) * 1951-06-09 1955-06-16 Eisenwerk Wanheim G M B H Verstellbarer hydraulischer Grubenstempel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444392A (en) * 2006-11-28 2008-06-04 Bifold Fluidpower Ltd Fluid flow control apparatus
GB2444392B (en) * 2006-11-28 2011-04-06 Bifold Fluidpower Ltd Fluid flow control apparatus
GB2475192A (en) * 2006-11-28 2011-05-11 Bifold Fluidpower Ltd Fluid flow control apparatus
GB2475192B (en) * 2006-11-28 2011-07-06 Bifold Fluidpower Ltd Fluid flow control apparatus
US8220478B2 (en) 2006-11-28 2012-07-17 Bifold Fluidpower Limited Fluid flow control apparatus
CN111239058A (zh) * 2020-02-24 2020-06-05 深圳九星印刷包装集团有限公司 指示装置

Also Published As

Publication number Publication date
BE565731A (enrdf_load_stackoverflow)
DE1038505B (de) 1958-09-11
NL226166A (enrdf_load_stackoverflow)

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