NL68863C - - Google Patents
Info
- Publication number
- NL68863C NL68863C NL68863DA NL68863C NL 68863 C NL68863 C NL 68863C NL 68863D A NL68863D A NL 68863DA NL 68863 C NL68863 C NL 68863C
- 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)
- Component Parts Of Construction Machinery (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL670826X | 1948-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL68863C true NL68863C (ja) |
Family
ID=19800430
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL68863D NL68863C (ja) | 1948-11-19 | ||
| NL70416D NL70416C (ja) | 1948-11-19 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL70416D NL70416C (ja) | 1948-11-19 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE492242A (ja) |
| DE (1) | DE815182C (ja) |
| FR (1) | FR1003951A (ja) |
| GB (1) | GB670826A (ja) |
| NL (2) | NL70416C (ja) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1211574B (de) * | 1958-05-30 | 1966-03-03 | Ludwig Vanwersch | Ausbaukappe fuer den Grubenbetrieb |
| DE1198770B (de) * | 1961-02-09 | 1965-08-19 | Heinrich Pierburg Fa | Vorpfaendgelenkkappe, insbesondere fuer den Strebausbau |
-
0
- NL NL68863D patent/NL68863C/xx active
- BE BE492242D patent/BE492242A/xx unknown
- NL NL70416D patent/NL70416C/xx active
-
1949
- 1949-11-18 GB GB29585/49A patent/GB670826A/en not_active Expired
- 1949-11-18 FR FR1003951D patent/FR1003951A/fr not_active Expired
- 1949-11-19 DE DED390A patent/DE815182C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE815182C (de) | 1951-10-01 |
| FR1003951A (fr) | 1952-03-24 |
| GB670826A (en) | 1952-04-23 |
| NL70416C (ja) | |
| BE492242A (ja) |