Tool
US4920837A · kind A · utility
3Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Oct 11, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/907
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A tool such as a drill bit which has a generally cylindrical shank for insertion in a tool receiver or holder of a rotary percussive machine or other rotary machine, such as a drilling machine. The shank has a curved surface portion and a flat surface portion of rectangular configuration, the flat surface portion lying between the ends of the shank. When the shank is inserted in a tool receiver of a rotary percussive machine (not shown), driving elements thereof engage and act on the flat surface to provide driving torque to the tool, which is thereby rotated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.