Power driven screwdriver
US5271471A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1993 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | May 18, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D1/0864
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A power driven screwdriver includes a clutch mechanism provided between a spindle for mounting a driver bit thereon and a drive member rotatably driven by a motor. The clutch mechanism includes a protrusion formed on one of the spindle and the drive member and a recess formed on the other for engagement with the protrusion. The protrusion includes a conical outer surface having a diameter decreasing toward the protrusion. The recess includes a conical inner surface which corresponds substantially to the conical outer surface of the protrusion and has a diameter increasing toward the recess. The conical outer surface has a second central axis displaced from the first central axis of the spindle or the drive member by a first distance. The conical inner surface has a third central axis displaced from the first central axis by a second distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.