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
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813111435 DE3111435A1 (de) | 1981-03-24 | 1981-03-24 | Hydraulisch entsperrbares rueckschlagventil fuer hydraulische hochdrucksysteme, insbesondere fuer hydraulische ausbausysteme in bergbau-untertagebetrieben |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2502731A1 FR2502731A1 (fr) | 1982-10-01 |
FR2502731B1 true FR2502731B1 (xx) | 1984-10-26 |
Family
ID=6128094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8204983A Granted FR2502731A1 (fr) | 1981-03-24 | 1982-03-24 | Clapet anti-retour pilote hydrauliquement pour systemes hydrauliques a haute pression, notamment pour systemes de soutenement hydrauliques d'exploitations minieres souterraines |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE3111435A1 (xx) |
FR (1) | FR2502731A1 (xx) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3316736A1 (de) * | 1983-05-07 | 1984-11-08 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Absperrventilvorrichtung fuer hydraulische hochdrucksysteme, insbesondere hydraulische ausbausysteme in bergbaubetrieben |
DE3402110A1 (de) * | 1984-01-21 | 1985-07-25 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Hydraulisch entsperrbares rueckschlagventil fuer hydraulische hochdrucksysteme, insbesondere fuer ausbausysteme in bergbau-untertagebetrieben |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2305361A1 (de) * | 1973-02-03 | 1974-08-08 | Gewerk Eisenhuette Westfalia | Vorrichtung zur automatischen wasserbeduesung in bergbau-gewinnungsbetrieben |
DE2805040C3 (de) * | 1978-02-07 | 1982-02-25 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 8000 München | In eine Gewindebohrung eingeschraubtes entsperrbares Rückschlagventil |
DE2856242C3 (de) * | 1978-12-27 | 1984-05-17 | Integral Hydraulik & Co, 4000 Düsseldorf | Einfach entsperrbares Rückschlagventil |
-
1981
- 1981-03-24 DE DE19813111435 patent/DE3111435A1/de not_active Withdrawn
-
1982
- 1982-03-24 FR FR8204983A patent/FR2502731A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2502731A1 (fr) | 1982-10-01 |
DE3111435A1 (de) | 1982-10-07 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |