Rotatable cutting bit insert
US5219209A · kind A · utility
24Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1992 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Jun 11, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/1837
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A multi-portion carbide cutting insert which affixes to the forward end of a rotatable cutting bit. The cutting insert has an axially forward tip portion and a flange portion with at least four mediate portions between the tip portion and the flange portion. The first mediate portion has an included angle less than that of the second mediate portion. The second mediate portion has an included angle greater than that of the third mediate portion. The fourth mediate portion has the largest included angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.