Electric tool
US9038743B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2010 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Nov 26, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2250/221
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hand-held power tool has a tool body, a motor housed in the tool body and a grip part designed to be held by a user, and performs a predetermined operation on a workpiece by a tool bit rotationally driven by the motor. The power tool includes a clutch that transmits torque and interrupts torque transmission between the motor and the tool bit, a non-contact torque sensor that detects torque acting on the tool bit in non-contact with a rotation axis rotating together with the tool bit, and a clutch control system that controls coupling and decoupling of the clutch according to a torque value detected by the non-contact torque sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.