Percussion rock drilling machine and drill rig
US10060206B2 · kind B2 · utility
0Cited by
14References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2010 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Oct 19, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/03
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a percussion rock drilling machine comprising a front head (1), in which front head (1) are arranged a flush housing (26) and a flush connector (25) for flushing medium. According to the invention, a sheath (31) of rust-resistant material is arranged at the front head (1) around the flush housing (26), such that flushing medium can enter the flush housing (26) through the flush connector (25), without coming into contact with the front head (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.