FR1054301A - étançon de mine en deux éléments - Google Patents
étançon de mine en deux élémentsInfo
- Publication number
- FR1054301A FR1054301A FR1054301DA FR1054301A FR 1054301 A FR1054301 A FR 1054301A FR 1054301D A FR1054301D A FR 1054301DA FR 1054301 A FR1054301 A FR 1054301A
- Authority
- FR
- France
- Prior art keywords
- mine prop
- piece
- piece mine
- 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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
- E21D15/26—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure
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 |
|---|---|---|---|
| DE1054301X | 1951-01-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1054301A true FR1054301A (fr) | 1954-02-09 |
Family
ID=7717804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1054301D Expired FR1054301A (fr) | 1951-01-05 | 1951-12-31 | étançon de mine en deux éléments |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR1054301A (fr) |
-
1951
- 1951-12-31 FR FR1054301D patent/FR1054301A/fr not_active Expired
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