Electric power tool
US9073186B2 · kind B2 · utility
8Cited by
1References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2012 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Jun 29, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25F5/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electric power tool includes a motor, a current detection unit, an operating portion, a current threshold setting unit and a control unit. The current threshold setting unit sets a current threshold so as to change in accordance with changes in a motor current which flows when the motor is started as usual until a predetermined period of time elapses since the control unit has started driving of the motor. When the predetermined period of time has elapsed, the current threshold setting unit fixes the current threshold to a constant value which corresponds to a set torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.