BE515437A - - Google Patents
Info
- Publication number
- BE515437A BE515437A BE515437DA BE515437A BE 515437 A BE515437 A BE 515437A BE 515437D A BE515437D A BE 515437DA BE 515437 A BE515437 A BE 515437A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Emergency Lowering Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE748081X | 1951-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE515437A true BE515437A (en:Method) |
Family
ID=6648781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE515437D BE515437A (en:Method) | 1951-11-12 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE515437A (en:Method) |
| FR (1) | FR1066401A (en:Method) |
| GB (1) | GB748081A (en:Method) |
-
0
- BE BE515437D patent/BE515437A/xx unknown
-
1952
- 1952-11-10 FR FR1066401D patent/FR1066401A/fr not_active Expired
- 1952-11-12 GB GB28577/52A patent/GB748081A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB748081A (en) | 1956-04-18 |
| FR1066401A (fr) | 1954-06-04 |