BE509688A - - Google Patents
Info
- Publication number
- BE509688A BE509688A BE509688DA BE509688A BE 509688 A BE509688 A BE 509688A BE 509688D A BE509688D A BE 509688DA BE 509688 A BE509688 A BE 509688A
- 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)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Load-Engaging Elements For Cranes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL709242X | 1951-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE509688A true BE509688A (en) |
Family
ID=19812158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE509688D BE509688A (en) | 1951-03-08 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE509688A (en) |
| DE (1) | DE960444C (en) |
| FR (1) | FR1052016A (en) |
| GB (1) | GB709242A (en) |
| NL (1) | NL71298C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1103269B (en) * | 1957-05-29 | 1961-03-30 | Dowty Mining Equipment Ltd | Hydraulically operated support device for the hanging wall |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE803992C (en) * | 1949-07-03 | 1951-04-16 | Wilhelm Reppel | Cap made of juxtaposed links for mining, especially longwall mining |
-
0
- NL NL71298D patent/NL71298C/xx active
- BE BE509688D patent/BE509688A/xx unknown
-
1952
- 1952-03-03 FR FR1052016D patent/FR1052016A/en not_active Expired
- 1952-03-04 GB GB5645/52A patent/GB709242A/en not_active Expired
- 1952-03-04 DE DEN5165A patent/DE960444C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB709242A (en) | 1954-05-19 |
| FR1052016A (en) | 1954-01-20 |
| DE960444C (en) | 1957-03-21 |
| NL71298C (en) |