Apparatus for supporting a mine roof support assembly
US4324510A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1980 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | Apr 25, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F13/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus is disclosed for supporting the lowermost roof support unit of a series of roof support units positioned side-by-side in an inclined longwall working. The support apparatus comprises a beam mounted for pivotal movement in a plane parallel to the floor of the working. The beam can be held in any given angular position. A support plate is provided for engagement with the side of the lowermost roof support unit. The support plate is movable towards, and away from, the beam by means of hydraulic rams, which also constitute means for holding the support plate and the beam at any given spacing within a predetermined range of spacings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.