Liquid seal for wet roof bit
US6886645B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Jun 4, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D20/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Fluid roof bits for mining typically supply high pressure water to a location immediately adjacent the cutting insert of the roof bit to flush debris and cool the cutting insert. The present invention is a drill steel assembly for a wet roof bit that reduces the fluid pressure loss supplied to the roof bit. A drill head body is connected to the drill steel by an intermediate adaptor. The adaptor has a spring loaded button thereon that mates with an opening in the drill head body so that the drill head body can be conveniently snapped onto the drill head assembly. A bushing seal made from a flexible material is clamped between said drill steel adaptor and the drill head body to limit fluid pressure losses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.