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 (de) | 1950-01-18 | 1950-01-18 | Kappenverbindung fuer den Strebausbau |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL74504C true NL74504C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=7569069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL74504D NL74504C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1950-01-18 |
Country Status (4)
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE499766A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1948-07-08 | |||
| DE977597C (de) * | 1950-11-01 | 1967-06-22 | Ludwig Vanwersch | Ausbaukappe |
| DE1097388B (de) * | 1952-05-29 | 1961-01-19 | Aloys Vanwersch | Kappenverbindung fuer den Strebausbau |
| DE1188024B (de) * | 1952-10-06 | 1965-03-04 | Aloys Vanwersch | Kappenverbindung fuer den Strebausbau |
-
0
- NL NL74504D patent/NL74504C/xx active
- BE BE502211D patent/BE502211A/fr unknown
-
1950
- 1950-01-18 DE DEV374A patent/DE833937C/de not_active Expired
-
1951
- 1951-04-11 FR FR1035841D patent/FR1035841A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE502211A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | |
| FR1035841A (fr) | 1953-08-31 |
| DE833937C (de) | 1952-03-13 |