Axially self-aligning drill bit
US4906146A · kind A · utility
Inventor
Key dates
| Filing date | Jun 13, 1984 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Jun 13, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/9093
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drill bit having an elongated, stiffly flexible shank and integral, hardened, enlarged cutting head and tip is adapted to maintain a penetration angle through a plurality of spaced wooden objects while being rotatably driven by a drill. The tip of the drill bit forms a portion of a cutting head and is of generally triangular shape having two relatively enlarged opposed flat surfaces joined by two tapered surfaces. The tapered surfaces intersect at a tip edge defined by a line which makes an acute angle with a plane bisecting said drill bit along the longitudinal axis thereof, and which plane is perpendicular to the flat surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.