Drill
US11883887B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2021 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Feb 24, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2251/408
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
For improving a drill, in particular a spiral drill, comprising a base body extending substantially longitudinally in a direction axial to a drill axis, said base body comprising a drilling portion, wherein a radially inward core region in relation to the drill axis and a radially outer region are provided in the base body in the drilling portion, and the drilling portion comprises a plurality of spiral-shaped recesses in the outer region, and arranged between each two spiral-shaped recesses is a wall part, it is proposed that the drill comprises at least four main cutting edges, in particular exactly four main cutting edge and/or the drill comprises at least three central cutting edge portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.