NL74504C - - Google Patents
Info
- Publication number
- NL74504C NL74504C NL74504DA NL74504C NL 74504 C NL74504 C NL 74504C NL 74504D A NL74504D A NL 74504DA NL 74504 C NL74504 C NL 74504C
- 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)
- Vehicle Step Arrangements And Article Storage (AREA)
- Photographic Developing Apparatuses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEV374A DE833937C (en) | 1950-01-18 | 1950-01-18 | Cap connection for longwall mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL74504C true NL74504C (en) |
Family
ID=7569069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL74504D NL74504C (en) | 1950-01-18 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE502211A (en) |
| DE (1) | DE833937C (en) |
| FR (1) | FR1035841A (en) |
| NL (1) | NL74504C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE499766A (en) * | 1948-07-08 | |||
| DE977597C (en) * | 1950-11-01 | 1967-06-22 | Ludwig Vanwersch | Expansion cap |
| DE1097388B (en) * | 1952-05-29 | 1961-01-19 | Aloys Vanwersch | Cap connection for longwall mining |
| DE1188024B (en) * | 1952-10-06 | 1965-03-04 | Aloys Vanwersch | Cap connection for longwall mining |
-
0
- BE BE502211D patent/BE502211A/fr unknown
- NL NL74504D patent/NL74504C/xx active
-
1950
- 1950-01-18 DE DEV374A patent/DE833937C/en not_active Expired
-
1951
- 1951-04-11 FR FR1035841D patent/FR1035841A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE502211A (en) | |
| DE833937C (en) | 1952-03-13 |
| FR1035841A (en) | 1953-08-31 |