Recessed head fastener and driver combination
US9957993B2 · kind B2 · utility
2Cited by
16References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 2015 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Dec 11, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B23/003
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A screw recess and driver combination that comprises the use of varying frustums of differing cones to provide driver/recess contact faces that are elliptical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.