Installation drill
US4753558A · kind A · utility
23Cited by
5References
3Claims
0Family size
Inventor
Key dates
| Filing date | Aug 7, 1985 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Aug 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/9065
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention concerns in brief a drill (1) for making of preferably through installation bores, through which bores flexible shafts, cables and the like can be lead in. The drill (1) comprises a bore crown (2) and a shank (3). The bore crown (2) has main cutting edges (6, 7) for forward drilling, side cutting edges (8) for radial drilling, and end cutting edges (9) for rearward drilling. The shank (3) preferably has a significantly smaller thickness than the area being drilled by the main cutting edges (6, 7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.