BE501454A - - Google Patents
Info
- Publication number
- BE501454A BE501454A BE501454DA BE501454A BE 501454 A BE501454 A BE 501454A BE 501454D A BE501454D A BE 501454DA BE 501454 A BE501454 A BE 501454A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM8118A DE853737C (en) | 1951-01-06 | 1951-01-06 | Device for the temporary self-supporting connection of a pre-pawing cap to the cap supported by the punch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE501454A true BE501454A (en) |
Family
ID=9743592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE501454D BE501454A (en) | 1951-01-06 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE501454A (en) |
| DE (1) | DE853737C (en) |
| FR (1) | FR1031195A (en) |
| GB (1) | GB686640A (en) |
-
0
- BE BE501454D patent/BE501454A/xx unknown
-
1951
- 1951-01-06 DE DEM8118A patent/DE853737C/en not_active Expired
- 1951-01-19 FR FR1031195D patent/FR1031195A/en not_active Expired
- 1951-02-02 GB GB266451A patent/GB686640A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB686640A (en) | 1953-01-28 |
| DE853737C (en) | 1952-10-27 |
| FR1031195A (en) | 1953-06-22 |