Apparatus for driving an upwardly directed shaft in rock
US4986374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1990 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Feb 28, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D3/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for driving an upwardly directed shaft in rock, which includes a platform that can be regulated in height. The platform carries a drilling unit having engageable elements enabling fixation of the drilling unit relative the wall of the shaft. The drilling unit and platform can be separated a given distance such as to form an air gap for preventing the transfer of vibrations from the drilling unit to the platform when a drilling machine pertaining to the drilling unit is in operation. The apparatus has bracket elements and a transverse member for limiting the separation distance between the drilling unit and platform. The platform carries a work station for a drilling machine operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.