Grinding device
US4744178A · kind A · utility
11Cited by
17References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Sep 25, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B3/28
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hand held grinding device for sharpening drill bits comprises a pair of bearing members which rotatably support a grinding wheel fast on a shaft. Portion of the shaft is engagable with the chuck of a drill. A guide plate with grooves for various size ranges of drill bits is hingedly connected to the bearing members by a plastics hinge. The grooves direct the drill bit to the grinding wheel at an angle of 59.degree.. By pivoting the guide plate relative to the bearing members, the trailing portion of the cutting edge of the drill bit is relieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.