Drill bit
US8784017B2 · kind B2 · utility
11Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2010 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Mar 14, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/902
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drill bit for a boring tool comprises a shank configured for engagement with the boring tool and a working tip having a first end attached to the shank and an opposite second end, and a conical helical thread extending substantially continuously from end to end. The thread root may include a rounded portion while the crest may be flat. The configuration of the helical thread, such as the crest width, thread depth, thread angle, cross sectional area and base width are adjusted as a function of the length of the threaded working tip to maximize bending strength and optimize thread wear and operability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.