FR1231525A - étancon hydraulique - Google Patents

étancon hydraulique

Info

Publication number
FR1231525A
FR1231525A FR801588A FR801588A FR1231525A FR 1231525 A FR1231525 A FR 1231525A FR 801588 A FR801588 A FR 801588A FR 801588 A FR801588 A FR 801588A FR 1231525 A FR1231525 A FR 1231525A
Authority
FR
France
Prior art keywords
stanchion
hydraulic
hydraulic stanchion
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
FR801588A
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment Ltd
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 Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Application granted granted Critical
Publication of FR1231525A publication Critical patent/FR1231525A/fr
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
    • F16K17/04—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)
  • Safety Valves (AREA)
FR801588A 1958-07-31 1959-07-30 étancon hydraulique Expired FR1231525A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2473058A GB877624A (en) 1958-07-31 1958-07-31 Improvements in release valves for hydraulic props

Publications (1)

Publication Number Publication Date
FR1231525A true FR1231525A (fr) 1960-09-29

Family

ID=10216346

Family Applications (1)

Application Number Title Priority Date Filing Date
FR801588A Expired FR1231525A (fr) 1958-07-31 1959-07-30 étancon hydraulique

Country Status (3)

Country Link
DE (1) DE1130779B (fr)
FR (1) FR1231525A (fr)
GB (1) GB877624A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389886A (en) * 1963-05-13 1968-06-25 A R L Named S T Dupont Soc Pneumatic pilot valve with snap action
US3638689A (en) * 1969-05-29 1972-02-01 Ljungmans Verkstader Ab Automatic dispensing nozzle
US4237769A (en) * 1978-04-03 1980-12-09 Commercial Shearing, Inc. Relief valves and mine props incorporating the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872191C (de) * 1951-01-09 1953-03-30 Gutehoffnungshuette Oberhausen Hydraulischer Grubenstempel
DE928945C (de) * 1951-06-09 1955-06-16 Eisenwerk Wanheim G M B H Verstellbarer hydraulischer Grubenstempel
DE1009581B (de) * 1956-01-17 1957-06-06 Gutehoffnungshuette Sterkrade Hydraulischer Grubenstempel
BE558743A (fr) * 1956-07-05

Also Published As

Publication number Publication date
GB877624A (en) 1961-09-20
DE1130779B (de) 1962-06-07

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