FR2502731B1 - - Google Patents

Info

Publication number
FR2502731B1
FR2502731B1 FR8204983A FR8204983A FR2502731B1 FR 2502731 B1 FR2502731 B1 FR 2502731B1 FR 8204983 A FR8204983 A FR 8204983A FR 8204983 A FR8204983 A FR 8204983A FR 2502731 B1 FR2502731 B1 FR 2502731B1
Authority
FR
France
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
FR8204983A
Other languages
French (fr)
Other versions
FR2502731A1 (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.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia GmbH
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 Gewerkschaft Eisenhutte Westfalia GmbH filed Critical Gewerkschaft Eisenhutte Westfalia GmbH
Publication of FR2502731A1 publication Critical patent/FR2502731A1/en
Application granted granted Critical
Publication of FR2502731B1 publication Critical patent/FR2502731B1/fr
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Check Valves (AREA)
  • Valve Device For Special Equipments (AREA)
FR8204983A 1981-03-24 1982-03-24 HYDRAULICALLY DRIVEN NON-RETURN VALVE FOR HIGH PRESSURE HYDRAULIC SYSTEMS, PARTICULARLY FOR HYDRAULIC SUPPORT SYSTEMS FOR UNDERGROUND MINING Granted FR2502731A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813111435 DE3111435A1 (en) 1981-03-24 1981-03-24 Hydraulically releasable non-return valve for hydraulic high-pressure systems, in particular for hydraulic support systems in underground mining operations

Publications (2)

Publication Number Publication Date
FR2502731A1 FR2502731A1 (en) 1982-10-01
FR2502731B1 true FR2502731B1 (en) 1984-10-26

Family

ID=6128094

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8204983A Granted FR2502731A1 (en) 1981-03-24 1982-03-24 HYDRAULICALLY DRIVEN NON-RETURN VALVE FOR HIGH PRESSURE HYDRAULIC SYSTEMS, PARTICULARLY FOR HYDRAULIC SUPPORT SYSTEMS FOR UNDERGROUND MINING

Country Status (2)

Country Link
DE (1) DE3111435A1 (en)
FR (1) FR2502731A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316736A1 (en) * 1983-05-07 1984-11-08 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen SHUT-OFF VALVE DEVICE FOR HYDRAULIC HIGH PRESSURE SYSTEMS, IN PARTICULAR HYDRAULIC REMOVAL SYSTEMS IN MINING OPERATIONS
DE3402110A1 (en) * 1984-01-21 1985-07-25 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Hydraulically releasable non-return valve for hydraulic high-pressure systems, in particular for support systems in underground mining operations

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2305361A1 (en) * 1973-02-03 1974-08-08 Gewerk Eisenhuette Westfalia DEVICE FOR AUTOMATIC WATER PRESSURE IN MINING EXTRACTIONS
DE2805040C3 (en) * 1978-02-07 1982-02-25 Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 8000 München Releasable check valve screwed into a threaded hole
DE2856242C3 (en) * 1978-12-27 1984-05-17 Integral Hydraulik & Co, 4000 Düsseldorf Check valve that can be unlocked easily

Also Published As

Publication number Publication date
FR2502731A1 (en) 1982-10-01
DE3111435A1 (en) 1982-10-07

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Legal Events

Date Code Title Description
ST Notification of lapse