Rock drill
US6283232A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2000 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Mar 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2251/204
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rock drill including a drill stem (2), major cutting edges (5, 6) extending substantially over a diameter of the drill stem (2) and projecting beyond the end face (3) of the drill stem, and at least one minor cutting edge (9, 10) extending substantially in a radial direction and provided on at least one elongate cutting body (7, 8) which projects beyond the end face (3), with the minor cutting edge (9, 10) being located, at a contemplated rotational direction (R) of the drill (1) about the drill axis (A), in front of a corresponding major cutting edge (5, 6) adjacent to a main discharge groove (13) for drilling dust, and with the elongate cutting body (7, 8) having a cutting surface (11) tapering from the minor cutting edge (9) toward the end face (3) of the drill stem (2) and having at least one inclination surface (12) adjacent to the circumference of the drill stem (2) and inclined toward the circumference of the drill stem and with respect to a radial extension of the minor cutting edge (9), in a direction opposite the drill rotational direction (R).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.