FR1037121A - - Google Patents
Info
- Publication number
- FR1037121A FR1037121A FR1037121DA FR1037121A FR 1037121 A FR1037121 A FR 1037121A FR 1037121D A FR1037121D A FR 1037121DA FR 1037121 A FR1037121 A FR 1037121A
- 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 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
- E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
- E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1037121A true FR1037121A (en) | 1953-09-15 |
Family
ID=1567508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1037121D Expired FR1037121A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR1037121A (en) |
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0
- FR FR1037121D patent/FR1037121A/fr not_active Expired