Power tool
US11331732B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2020 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Jan 16, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27B5/36
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Twisting of a locking member due to cogging torque is reduced without lowering the locking and unlocking operability for a user. A power tool includes a housing, an electric motor located inside the housing and including a permanent magnet, a shaft rotatable about an axis relative to the housing to transmit power from the electric motor, a locking member movable between a lock position and an unlock position in a nonenergized state of the electric motor and engageable with the shaft at the lock position to lock rotation of the shaft, and an abutting member that applies, to the locking member at the lock position, a force in a direction opposite to an axial torque caused by the permanent magnet and applied to the locking member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.