Rotary cutting bit with material-deflecting ledge
US7204560B2 · kind B2 · utility
112Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2003 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Aug 15, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/1837
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cutting bit includes a body having a front surface and a side surface, the side surface including a shoulder below the front surface and extending substantially perpendicular to a central axis of the body, and a ring that is harder than the body attached to the body at a front surface of the shoulder. Wear life of the cutting bit is enhanced by maintaining particular dimensional relationships regarding the position of the ring on the body, and the diameter of portions of the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.