BE492242A - - Google Patents
Info
- Publication number
- BE492242A BE492242A BE492242DA BE492242A BE 492242 A BE492242 A BE 492242A BE 492242D A BE492242D A BE 492242DA BE 492242 A BE492242 A BE 492242A
- Authority
- BE
- Belgium
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)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
- Component Parts Of Construction Machinery (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL670826X | 1948-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE492242A true BE492242A (hu) |
Family
ID=19800430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE492242D BE492242A (hu) | 1948-11-19 |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE492242A (hu) |
DE (1) | DE815182C (hu) |
FR (1) | FR1003951A (hu) |
GB (1) | GB670826A (hu) |
NL (2) | NL70416C (hu) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1211574B (de) * | 1958-05-30 | 1966-03-03 | Ludwig Vanwersch | Ausbaukappe fuer den Grubenbetrieb |
DE1198770B (de) * | 1961-02-09 | 1965-08-19 | Heinrich Pierburg Fa | Vorpfaendgelenkkappe, insbesondere fuer den Strebausbau |
-
0
- NL NL68863D patent/NL68863C/xx active
- NL NL70416D patent/NL70416C/xx active
- BE BE492242D patent/BE492242A/xx unknown
-
1949
- 1949-11-18 FR FR1003951D patent/FR1003951A/fr not_active Expired
- 1949-11-18 GB GB29585/49A patent/GB670826A/en not_active Expired
- 1949-11-19 DE DED390A patent/DE815182C/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL70416C (hu) | |
DE815182C (de) | 1951-10-01 |
FR1003951A (fr) | 1952-03-24 |
NL68863C (hu) | |
GB670826A (en) | 1952-04-23 |