NL70374C - - Google Patents
Info
- Publication number
- NL70374C NL70374C NL70374DA NL70374C NL 70374 C NL70374 C NL 70374C NL 70374D A NL70374D A NL 70374DA NL 70374 C NL70374 C NL 70374C
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/58—Devices for setting props or chocks
-
- 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
- E21D17/082—Cap joints for obtaining a coal-face free of pit-props of sliding 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)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Bridges Or Land Bridges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL676582X | 1949-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL70374C true NL70374C (en:Method) |
Family
ID=19802301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL70374D NL70374C (en:Method) | 1949-07-29 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE827052C (en:Method) |
| GB (1) | GB676582A (en:Method) |
| NL (1) | NL70374C (en:Method) |
-
0
- NL NL70374D patent/NL70374C/xx active
-
1950
- 1950-07-26 GB GB18685/50A patent/GB676582A/en not_active Expired
- 1950-07-27 DE DEN1576A patent/DE827052C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE827052C (de) | 1952-01-07 |
| GB676582A (en) | 1952-07-30 |