FR923079A - Improvement in metal props - Google Patents
Improvement in metal propsInfo
- Publication number
- FR923079A FR923079A FR923079DA FR923079A FR 923079 A FR923079 A FR 923079A FR 923079D A FR923079D A FR 923079DA FR 923079 A FR923079 A FR 923079A
- Authority
- FR
- France
- Prior art keywords
- improvement
- metal props
- props
- 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
- E21D15/58—Devices for setting props or chocks
- E21D15/581—Devices for setting props or chocks in which the props are pre- loaded
-
- 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 |
---|---|---|---|
FR923079T | 1946-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR923079A true FR923079A (en) | 1947-06-26 |
Family
ID=9438437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR923079D Expired FR923079A (en) | 1946-03-01 | 1946-03-01 | Improvement in metal props |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR923079A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2723100A (en) * | 1951-04-13 | 1955-11-08 | Muschamp Norman James | Releasable supports for roofs in underground mines |
-
1946
- 1946-03-01 FR FR923079D patent/FR923079A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2723100A (en) * | 1951-04-13 | 1955-11-08 | Muschamp Norman James | Releasable supports for roofs in underground mines |
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