Electric power tool
US8796976B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2012 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Feb 23, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/147
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electric power tool includes a motor that rotary drives an output shaft; an operation unit to input a drive command of the motor; a torque setting device that sets an upper limit value of a rotational torque of the output shaft in accordance with a torque setting command; and a control device that drives the motor in one of a forward direction and a reverse direction in accordance with the drive command, and stops driving of the motor when the rotational torque of the output shaft has reached the upper limit value set by the torque setting device during driving of the motor. The torque setting device is configured to set the upper limit value such that the upper limit value during driving of the motor in the forward direction and the upper limit value during driving of the motor in the reverse direction are different.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.