FR1222567A - étai de mine - Google Patents
étai de mineInfo
- Publication number
- FR1222567A FR1222567A FR782697A FR782697A FR1222567A FR 1222567 A FR1222567 A FR 1222567A FR 782697 A FR782697 A FR 782697A FR 782697 A FR782697 A FR 782697A FR 1222567 A FR1222567 A FR 1222567A
- Authority
- FR
- France
- Prior art keywords
- mine prop
- prop
- mine
- 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
- 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
- E21D15/30—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber
- E21D15/306—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber by means of a liquid
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1222567X | 1957-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1222567A true FR1222567A (fr) | 1960-06-10 |
Family
ID=7734199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR782697A Expired FR1222567A (fr) | 1957-12-30 | 1958-12-26 | étai de mine |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR1222567A (fr) |
-
1958
- 1958-12-26 FR FR782697A patent/FR1222567A/fr not_active Expired
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