Mine support having a linearly moveable and/or pivoting end plate
US8052352B2 · kind B2 · utility
8Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2007 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Aug 17, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D15/55
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mine support yieldable prop includes a threaded shaft rotatably mounted in an end of the prop to move into and out of the prop end to move a bearing plate toward or away from a mine roof, and/or a bearing plate pivotally mounted to the end of the prop to level the prop with uneven mine roofs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.