FR64350E - telescopic prop - Google Patents
telescopic propInfo
- Publication number
- FR64350E FR64350E FR64350DA FR64350E FR 64350 E FR64350 E FR 64350E FR 64350D A FR64350D A FR 64350DA FR 64350 E FR64350 E FR 64350E
- Authority
- FR
- France
- Prior art keywords
- telescopic prop
- prop
- telescopic
- 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
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
- E21D15/20—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR64350T | 1953-09-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR64350E true FR64350E (en) | 1955-11-09 |
Family
ID=8697434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR64350D Expired FR64350E (en) | 1953-09-25 | 1953-09-25 | telescopic prop |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR64350E (en) |
-
1953
- 1953-09-25 FR FR64350D patent/FR64350E/en not_active Expired
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