FR75374E - mine prop - Google Patents
mine propInfo
- Publication number
- FR75374E FR75374E FR789984A FR789984A FR75374E FR 75374 E FR75374 E FR 75374E FR 789984 A FR789984 A FR 789984A FR 789984 A FR789984 A FR 789984A FR 75374 E FR75374 E FR 75374E
- Authority
- FR
- France
- Prior art keywords
- mine prop
- prop
- mine
- 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
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
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction
-
- 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
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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR789984A FR75374E (en) | 1959-03-20 | 1959-03-20 | mine prop |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR789984A FR75374E (en) | 1959-03-20 | 1959-03-20 | mine prop |
Publications (1)
Publication Number | Publication Date |
---|---|
FR75374E true FR75374E (en) | 1961-06-09 |
Family
ID=8712757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR789984A Expired FR75374E (en) | 1959-03-20 | 1959-03-20 | mine prop |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR75374E (en) |
-
1959
- 1959-03-20 FR FR789984A patent/FR75374E/en not_active Expired
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