Drive system with full surface drive contact
US10788077B2 · kind B2 · utility
2Cited by
19References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 14, 2017 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | Jul 8, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2001/102
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drive system with full surface drive contact. The drive system tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure. The drive system comprises a fastener and/or bit having drive surfaces formed of either polygon involutes or a single arc construction. A punch is also provided for forming a recess in either the fastener or the bit, wherein the punch has corresponding surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.