Screwdriver
US10022846B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | May 27, 2013 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | Apr 27, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B17/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides a screwdriver which includes a shaft, a handle and a speed increasing mechanism, in which the speed increasing mechanism includes a central axle connected to the shaft and provided with a toothed part on its periphery, a first member is disposed in the interior of the handle, at least one gear is connected to the first member, and a geared sleeve is sheathed outside the gear, in which the inner side of the geared sleeve has teeth on corresponding positions, engaging with the gear which is disposed at a side part of the central axle and is engaged with the toothed part of the periphery of the central axle. The present invention also includes a locking mechanism addressing the problem of torque being not high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.