Rock drilling machine
US5613568A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1995 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Nov 1, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B4/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rock drilling machine of the self-feeding, integrated type which is designed to operate in situ in a drill hole. The rock drilling machine comprises a drive unit (1), an anchoring unit (2), and a feeding unit (3) which is active between the anchoring unit (2) and the drive unit (1). The drive unit (1) comprises a hydraulic power assembly (5, 8) at the rear end of the unit, a drill bit (21) which is rotatable at the front end of the unit, a guide (10) with a longitudinal cavity (23), which guide extends between the hydraulic power assembly and the drill head and connects these non-rotatably to each other, a rotatable drive shaft (22) which extends from the hydraulic power assembly, through the said cavity in the guide, for rotation of the drill bit, and first securing devices (17) in order to be able to anchor the drive unit releasably in the drill hole. The anchoring unit (2) comprises at least one control element (30') around the said guide, and second securing devices (31, 31') in order to anchor the control element releasably by means of engagement against the drill hole wall, and the feeding unit (3) comprises at least three individually manoeuvrable hydraulic cylinders (60-6…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.