Rotatable cutting bit assembly with cutting inserts
US6044920A · kind A · utility
121Cited by
39References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1998 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Jul 1, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotatable cutting bit which comprises an elongate bit body which has a forward end and a rearward end and which defines a peripheral surface. The bit body contains a first seat at the axially forward end thereof. A first cutting insert is mechanically retained in the seat so as to present a clearance cutting edge which radially extends past the peripheral surface of the bit body. The first cutting insert has a leading cutting edge disposed at a lead angle between 50 degrees and 80 degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.