Mining apparatus
US4254993A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1979 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | Jun 21, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C27/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved mining apparatus for excavating material, such as coal, for example, from an earth formation, such as a coal seam, for example, wherein a miner, having a forward and a rearward cutter, is guided through the coal seam and excavates a borehole therein, the borehole being filled with a working fluid during the operation of the miner, the working fluid facilitating the operation of the miner and providing a vehicle for removing the mined material. Substantially all of the operations of the miner are controlled from the earth's surface thereby eliminating the necessity and accompanying hazards and costs involved in utilizing personnel underground during the mining operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.