BE549548A - - Google Patents
Info
- Publication number
- BE549548A BE549548A BE549548DA BE549548A BE 549548 A BE549548 A BE 549548A BE 549548D A BE549548D A BE 549548DA BE 549548 A BE549548 A BE 549548A
- 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)
- Load-Engaging Elements For Cranes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE839211X | 1956-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE549548A true BE549548A (en) |
Family
ID=3881909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE549548D BE549548A (en) | 1956-07-14 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE549548A (en) |
| FR (1) | FR1175518A (en) |
| GB (1) | GB839211A (en) |
-
0
- BE BE549548D patent/BE549548A/xx unknown
-
1957
- 1957-05-20 FR FR1175518D patent/FR1175518A/en not_active Expired
- 1957-05-23 GB GB16365/57A patent/GB839211A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1175518A (en) | 1959-03-27 |
| GB839211A (en) | 1960-06-29 |