Percussion or hammer drill
US7314102B2 · kind B2 · utility
4Cited by
5References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2002 |
| Grant date | Jan 1, 2008 |
| Priority date | — |
| Expiry date | Sep 23, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/9097
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A percussion or hammer drill is provided including a drill plate arranged in the head end of a drill shaft, extending completely across the diameter of the drill shaft and comprising an open front face. Wedge-shaped cutting edges and flanks form two main cutters on the front face, whereby a plane running through the drill axis forms a mid-plane-of both main cutters. The main cutters form a tip angle in the range of approximately 140° to 180° and are separated by a central point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.