Back-side taper wedging drive system
US5461952A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1993 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Oct 1, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B23/003
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A driver assembly for driving fasteners into a workpiece comprises a multilobular fastener engaging portion for engagement in a complementary multilobular socket or recess on a fastener. Each lobe is bounded on opposite sides by a flute, and each lobe includes a driving side wall and a trailing tapered side wall. The driving side walls are adapted to contact the complementary lobular portions of the fastener for applying torque to the fastener, while the trailing tapered side wall is aligned to contact the complementary lobular portion in wedged engagement at a point when the fastener is applied to the fastener portion. A fastener socket is also provided having a driven side wall and a trailing tapered side wall, which is constructed substantially similarly to the tapered side wall of the drive bit and which provides similar attributes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.