Rotatable cutting bit and bit holder
US5415462A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1994 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Apr 14, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/197
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotatable cutting bit for insertion into the bore of a bit holder wherein the cutting bit includes a bit body with opposite forward and rearward ends, a hard insert at the forward end of the bit body, and an enlarged mediate portion which has a rearwardly facing shoulder. The cutting bit further has a rearward shank which contains a reduced diameter portion. The cutting bit carries a rotatable sleeve on the shank whereby the sleeve surrounds the shank between the shoulder and the reduced diameter portion. The cutting bit also carries a rotatable washer on the shank adjacent the shoulder of the bit body. A keeper ring is captive within the reduced diameter portion of the shank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.