LU31403A1 - - Google Patents
Info
- Publication number
- LU31403A1 LU31403A1 LU31403DA LU31403A1 LU 31403 A1 LU31403 A1 LU 31403A1 LU 31403D A LU31403D A LU 31403DA LU 31403 A1 LU31403 A1 LU 31403A1
- Authority
- LU
- Luxembourg
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)
- Emergency Lowering Means (AREA)
- Component Parts Of Construction Machinery (AREA)
- Clamps And Clips (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE718457X | 1951-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU31403A1 true LU31403A1 (zh) |
Family
ID=3878822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU31403D LU31403A1 (zh) | 1951-04-23 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE502749A (zh) |
| DE (1) | DE1022538B (zh) |
| FR (1) | FR1054501A (zh) |
| GB (1) | GB718457A (zh) |
| LU (1) | LU31403A1 (zh) |
| NL (1) | NL83499C (zh) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2991097A (en) * | 1948-07-08 | 1961-07-04 | Vanwersch Aloys | Connecting structure for beams of a roof support or the like |
| US4653951A (en) * | 1985-08-12 | 1987-03-31 | General Dynamics Corp./Convair Division | Zero free-play joint for deployable space structures |
| US4881776A (en) * | 1988-11-22 | 1989-11-21 | Casual Living International Inc. | Chairs with foldable backs |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE804317C (de) * | 1949-03-22 | 1951-04-19 | Otto Leppak | Verfahren zur Schaffung einer stempelfreien Abbaufront beim eisernen Strebausbau |
-
0
- NL NL83499D patent/NL83499C/xx active
- BE BE502749D patent/BE502749A/xx unknown
- LU LU31403D patent/LU31403A1/xx unknown
-
1952
- 1952-04-15 FR FR1054501D patent/FR1054501A/fr not_active Expired
- 1952-04-19 DE DEU1622A patent/DE1022538B/de active Pending
- 1952-04-21 GB GB9984/52A patent/GB718457A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB718457A (en) | 1954-11-17 |
| NL83499C (zh) | |
| BE502749A (zh) | |
| DE1022538B (de) | 1958-01-16 |
| FR1054501A (fr) | 1954-02-11 |