FR1028960A - metal mine prop - Google Patents
metal mine propInfo
- Publication number
- FR1028960A FR1028960A FR1028960DA FR1028960A FR 1028960 A FR1028960 A FR 1028960A FR 1028960D A FR1028960D A FR 1028960DA FR 1028960 A FR1028960 A FR 1028960A
- Authority
- FR
- France
- Prior art keywords
- metal mine
- mine prop
- prop
- metal
- 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
- 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
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
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 |
---|---|---|---|
DE1028960X | 1949-11-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1028960A true FR1028960A (en) | 1953-05-29 |
Family
ID=7715395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1028960D Expired FR1028960A (en) | 1949-11-14 | 1950-11-10 | metal mine prop |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1028960A (en) |
-
1950
- 1950-11-10 FR FR1028960D patent/FR1028960A/en not_active Expired
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