Assembly for preventing the fall of dust and debris in a mine
US4003208A · kind A · utility
17Cited by
6References
9Claims
0Family size
Inventors
Key dates
| Filing date | Sep 2, 1975 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Sep 2, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12347
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An assembly for preventing the falling of dust and debris from the roof and from the break of a mine, particularly a coal mine. The assembly comprises a shield support structure having roof bars and a roof covering disposed between the roof of the mine and the roof bars. The roof covering includes a welded wire-netting sheet having longitudinal and transverse wires with a dust-tight web welded or fixed in between said longitudinal and transverse wires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.