NL70049C - - Google Patents
Info
- Publication number
- NL70049C NL70049C NL70049DA NL70049C NL 70049 C NL70049 C NL 70049C NL 70049D A NL70049D A NL 70049DA NL 70049 C NL70049 C NL 70049C
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
- E21D15/14—Telescopic props
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/22—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed upon excessive pressure
-
- 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
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/43—Details of wedges
-
- 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)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Joining Of Building Structures In Genera (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1010120T | 1948-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL70049C true NL70049C (en0) |
Family
ID=9568768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL70049D NL70049C (en0) | 1948-07-30 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE485602A (en0) |
| FR (1) | FR1010120A (en0) |
| GB (1) | GB660738A (en0) |
| NL (1) | NL70049C (en0) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1022992B (de) * | 1951-05-15 | 1958-01-23 | Gutehoffnungshuette Sterkrade | Grubenausbaukappe mit Gelenkverbindung |
| DE7033832U (de) * | 1970-09-11 | 1971-01-28 | Gewerk Eisenhuette Westfalia | Gelenkkappe fuer einen wandernden ausbau von bergmaennischen gewinnungsbetrieben. |
-
0
- NL NL70049D patent/NL70049C/xx active
- BE BE485602D patent/BE485602A/xx unknown
-
1948
- 1948-07-30 FR FR1010120D patent/FR1010120A/fr not_active Expired
-
1949
- 1949-07-29 GB GB20018/49A patent/GB660738A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1010120A (fr) | 1952-06-09 |
| GB660738A (en) | 1951-11-14 |
| BE485602A (en0) |