Impact tools and control modes
US12015364B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2022 |
| Grant date | Jun 18, 2024 |
| Priority date | — |
| Expiry date | Jan 16, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2250/095
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A power tool includes a housing, a brushless motor received in the housing, a power switch coupled to the housing and actuatable by a user, a controller configured to control power delivery to the motor in response to actuation of the power switch, and an output spindle configured to rotate when the motor is energized. The controller is configured to maintain an amount of current delivered to the motor to be less than or equal to a current limit by turning off or reducing power to the motor for a time period if the current exceeds the current limit and then restarting power delivery to the motor. The time period is greater than the duration of one full current cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.