FR997068A - metal prop for mines - Google Patents
metal prop for minesInfo
- Publication number
- FR997068A FR997068A FR997068DA FR997068A FR 997068 A FR997068 A FR 997068A FR 997068D A FR997068D A FR 997068DA FR 997068 A FR997068 A FR 997068A
- Authority
- FR
- France
- Prior art keywords
- mines
- metal prop
- prop
- metal
- 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
- E21D15/16—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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
- E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR997068T | 1949-10-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR997068A true FR997068A (en) | 1951-12-31 |
Family
ID=9558364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR997068D Expired FR997068A (en) | 1949-10-10 | 1949-10-10 | metal prop for mines |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR997068A (en) |
-
1949
- 1949-10-10 FR FR997068D patent/FR997068A/en not_active Expired
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