Rotary cutting bit with material-deflecting ledge
US6709065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2002 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Jan 30, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28D1/188
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A cutting bit includes a steel body on which a carbide cutting tip is brazed. Disposed rearwardly of a rearwardmost end of the tip, on a tapered side surface of a head of the bit body is an annular ledge which extends laterally outwardly sufficiently far to deflect cuttings laterally away from the bit. The ledge can be formed integrally with the bit body as the result of a machining operation, or the ledge can comprise a split ring that is elastically held in a groove formed in the tapered side surface. The ledge extends perpendicularly to a center axis of the bit, or is inclined slightly forwardly, in order to trap cuttings, such as asphalt, to cause a protective ring of asphalt to be formed in front of the ledge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.