NL111909C - - Google Patents
Info
- Publication number
- NL111909C NL111909C NL111909DA NL111909C NL 111909 C NL111909 C NL 111909C NL 111909D A NL111909D A NL 111909DA NL 111909 C NL111909 C NL 111909C
- 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)
- Heat Sensitive Colour Forming Recording (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE799739X | 1954-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL111909C true NL111909C (fr) |
Family
ID=6711673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL111909D NL111909C (fr) | 1954-08-19 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE540613A (fr) |
| FR (1) | FR1135845A (fr) |
| GB (1) | GB799739A (fr) |
| NL (1) | NL111909C (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE499766A (fr) * | 1948-07-08 | |||
| DE1218382B (de) * | 1958-03-18 | 1966-06-08 | Hermann Schwarz Kommanditgesel | Zugfeste Verbindung fuer gelenkig verbundene Kappen im Strebausbau |
| US3043108A (en) * | 1958-07-16 | 1962-07-10 | Vanwersch Aloys | Mine roof bar arrangement |
-
0
- NL NL111909D patent/NL111909C/xx active
- BE BE540613D patent/BE540613A/xx unknown
-
1955
- 1955-08-16 FR FR1135845D patent/FR1135845A/fr not_active Expired
- 1955-08-17 GB GB23733/55A patent/GB799739A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB799739A (en) | 1958-08-13 |
| FR1135845A (fr) | 1957-05-03 |
| BE540613A (fr) |