FR29211E - Support system - Google Patents
Support systemInfo
- Publication number
- FR29211E FR29211E FR29211DA FR29211E FR 29211 E FR29211 E FR 29211E FR 29211D A FR29211D A FR 29211DA FR 29211 E FR29211 E FR 29211E
- Authority
- FR
- France
- Prior art keywords
- support system
- support
- 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 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
- E21D15/36—Telescopic props with parts held relatively to each other by friction or gripping by a tiltable collar surrounding one or both parts
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR29211T | 1924-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR29211E true FR29211E (en) | 1925-07-09 |
Family
ID=8667260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR29211D Expired FR29211E (en) | 1924-08-08 | 1924-08-08 | Support system |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR29211E (en) |
-
1924
- 1924-08-08 FR FR29211D patent/FR29211E/en not_active Expired
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