FR849422A - étançon métallique - Google Patents
étançon métalliqueInfo
- Publication number
- FR849422A FR849422A FR849422DA FR849422A FR 849422 A FR849422 A FR 849422A FR 849422D A FR849422D A FR 849422DA FR 849422 A FR849422 A FR 849422A
- Authority
- FR
- France
- Prior art keywords
- metal prop
- prop
- metal
- 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
Links
- 239000002184 metal Substances 0.000 title 1
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
- E21D15/005—Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material
-
- 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
- E21D15/517—Extension elements
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE849422X | 1938-02-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR849422A true FR849422A (fr) | 1939-11-23 |
Family
ID=3882085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR849422D Expired FR849422A (fr) | 1938-02-03 | 1939-01-26 | étançon métallique |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR849422A (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1053453B (de) * | 1956-02-10 | 1959-03-26 | Maximilianshuette Eisenwerk | Ausziehbarer Grubenstempel |
DE1085121B (de) * | 1955-02-26 | 1960-07-14 | Hoesch Ag | Druckmittelbetaetigter Grubenstempel |
DE1085120B (de) * | 1957-06-29 | 1960-07-14 | Eickhoff Geb | Schreitender Strebausbau fuer die flache Lagerung |
-
1939
- 1939-01-26 FR FR849422D patent/FR849422A/fr not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1085121B (de) * | 1955-02-26 | 1960-07-14 | Hoesch Ag | Druckmittelbetaetigter Grubenstempel |
DE1053453B (de) * | 1956-02-10 | 1959-03-26 | Maximilianshuette Eisenwerk | Ausziehbarer Grubenstempel |
DE1085120B (de) * | 1957-06-29 | 1960-07-14 | Eickhoff Geb | Schreitender Strebausbau fuer die flache Lagerung |
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