Drilling apparatus and method for single pass bolting
US6648557B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Oct 30, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D21/0053
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling apparatus for single pass bolting, the drilling apparatus comprising a drill steel assembly and a disposable drill bit, wherein the drill steel assembly comprises at least a drill steel having first and second ends, the first end of the drill steel being adapted to releasably operatively engage a drive for imparting rotational and impact energy and the second end of the drill steel is releasably operatively interconnected with the disposable drill bit, the drill steel being adapted to transmit rotational and impact energy to the disposable drill bit, and wherein the drilling apparatus is characterized in that a portion of the drill steel proximate the second end thereof is adapted to be received within a standard friction bolt, the drill steel assembly is provided with a flange adapted to drive the friction bolt into a body requiring reinforcement, and the drill steel assembly is adapted to allow facile disconnection of the disposable drill bit therefrom, whilst the drilling apparatus is embedded in the body requiring reinforcement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.