Rotatable cutting tool and cutting tool body
US7458646B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2006 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Oct 6, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/183
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotatable cutting tool carried in a bore of a holder wherein the holder has a forward surface surrounding a forward end of the bore. The rotatable cutting tool includes an elongate cutting tool body that has a central longitudinal axis, an axial forward end and an axial rearward end. The cutting tool body contains a socket in the axial forward end thereof whereby the socket receives a hard insert therein. The cutting tool body has an enlarged diameter collar mediate of the axial forward end and the axial rearward end. The mediate collar presents an axial forward facing surface and an axial rearward facing surface. The cutting tool body has an axial forward hardness region beginning at and extending a first pre-selected distance in an axial rearward direction from the axial forward end to encompass the axial forward facing surface of the collar. The axial forward hardness region has a hardness equal to or greater than a first hardness, as well as a first average hardness. The cutting tool body has an axial rearward hardness region beginning at and extending a second pre-selected distance in an axial forward direction from the axial rearward end to encompass an axial rearward secti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.