NL71298C - - Google Patents
Info
- Publication number
- NL71298C NL71298C NL71298DA NL71298C NL 71298 C NL71298 C NL 71298C NL 71298D A NL71298D A NL 71298DA NL 71298 C NL71298 C NL 71298C
- Authority
- NL
- Netherlands
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)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL709242X | 1951-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL71298C true NL71298C (ja) |
Family
ID=19812158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL71298D NL71298C (ja) | 1951-03-08 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE509688A (ja) |
| DE (1) | DE960444C (ja) |
| FR (1) | FR1052016A (ja) |
| GB (1) | GB709242A (ja) |
| NL (1) | NL71298C (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1103269B (de) * | 1957-05-29 | 1961-03-30 | Dowty Mining Equipment Ltd | Hydraulisch betaetigte Abstuetzvorrichtung des Hangenden |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE803992C (de) * | 1949-07-03 | 1951-04-16 | Wilhelm Reppel | Aus aneinandergesetzten Gliedern bestehende Kappe fuer den Grubenausbau, insbesondere den Strebausbau |
-
0
- BE BE509688D patent/BE509688A/xx unknown
- NL NL71298D patent/NL71298C/xx active
-
1952
- 1952-03-03 FR FR1052016D patent/FR1052016A/fr not_active Expired
- 1952-03-04 DE DEN5165A patent/DE960444C/de not_active Expired
- 1952-03-04 GB GB5645/52A patent/GB709242A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE960444C (de) | 1957-03-21 |
| GB709242A (en) | 1954-05-19 |
| BE509688A (ja) | |
| FR1052016A (fr) | 1954-01-20 |