Rotatable cutting tool with superhard cutting member
US7959234B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2009 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Sep 22, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/1837
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotatable cutting tool that is useful for impingement upon a substrate and is adapted to be rotatably retained within the bore of a holder. The rotatable cutting tool includes an elongate cutting tool body, which has an axial forward end and an axial rearward end, as well as a socket at the axial forward end thereof. The rotatable cutting tool also includes a hard cutting member that is affixed to the cutting tool body within the socket. The hard cutting member has an axial forward end and an axial rearward end. The hard cutting member has a superhard axial forward portion at the axial forward end thereof wherein the superhard axial forward portion has a maximum transverse dimension. The hard cutting member further has a hard axial rearward portion contiguous with and axial rearward of the superhard axial forward portion. The hard axial rearward portion has a maximum transverse dimension. The ratio of the maximum transverse dimension of the superhard axial forward portion to the maximum transverse dimension of the hard axial rearward portion ranges between about 0.35 and about 0.45.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.