Drill bit device
US3945753A · kind A · utility
39Cited by
4References
8Claims
0Family size
Inventors
Key dates
| Filing date | Jul 29, 1974 |
| Grant date | Mar 23, 1976 |
| Priority date | — |
| Expiry date | Jul 29, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/902
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Drill bit construction having a removable lead screw and a drill body with a work face comprised of two planar surfaces which geometrically intersect on a diameter line such that the angle between the two surfaces is approximately 170.degree.. A cut-away segment is formed on each side of the body with each of the segments having a cutting edge in the form of a detachable blade which is also provided with a cutting spur on the outer end. The body itself is detachably removable from the drill shaft or shank. The body is also provided with a removable lead screw or guide point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.