Control system for longwall shearer
US5228751A · kind A · utility
18Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Oct 4, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/302
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for measuring the degrees of roll of the body of a longwall shearing machine and providing signals proportional to the roll angle which are used to control drum cutting positions for controlling roof and floor horizons of a coal tunnel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.