Hand held drill with integral drill bit sharpener
US4850150A · kind A · utility
Inventor
Key dates
| Filing date | Nov 16, 1988 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Nov 16, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B3/265
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drill bit sharpener in combination with a hand held electric power drill having a chuck, an electric motor and a drive shaft powering the chuck. The sharpener includes an abrasive wheel supported within the hand held housing of the electric power drill for rotation about a central axis. The abrasive wheel has a cupped concave angled grinding face disposed facing the hand held housing. The housing has a single passageway parallel to and off set from the central axis. An aperture is disposed within the housing normal to and communicating with the single passageway. A first stationary pin is engaged within the aperture extending outwardly into the single passageway for engaging a first flute on a drill bit inserted through the single passageway. A second reciprocal pin extends outwardly into the single passageway, opposing the first pin, for engaging a second flute of the drill bit to secure the drill bit against rotation. A rotatable plate is disposed on an external surface of the housing and has a plurality of apertures individually alignable over the single passageway for selectively locating a desired size aperture in communication with the single passageway allowing insertion o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.