Apparatus for forming long and short holes and setting rock bolts
US5246313A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1991 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Jun 28, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D20/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for drilling short and long holes and for fitting bolts to the short holes has a generally stationary support positioned adjacent the face and a turret angularly displaceable on the support between two end positions about a longitudinal turret axis. A drill slide longitudinally displaceable on the turret carries a drill having a rotatable stem centered on a drill axis parallel to the turret axis. A drill bit can be fitted to the stem. A bolt slide longitudinally displaceable on the turret adjacent the drill slide carries a bolting unit having a ram centered on a bolt axis. A magazine mounted on the support adjacent the turret has a plurality of seats adapted to hold the bolts and extension rods fittable between the bit and the drill stem, depending on whether the device is to be used for short-hold drilling and bolting or for long-hole drilling. A device on the support can transfer bolts from the magazine to the bolting unit when the turret is in the other end position for short-hole drilling and bolting and can transfer extension rods from the magazine to the drill in the one end position of the turret when the apparatus is used for long-hole drilling. A stinger on th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.