Mine roof supports
US5423638A · kind A · utility
10Cited by
7References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Mar 9, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D23/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mine roof support having means for monitoring the angles made by the canopy 11 and the base 10 with respect to a datum. The angular information may be gathered in a number of different ways and the information used to control subsequent movements of the support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.