Impact tools and control modes
US12212264B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2022 |
| Grant date | Jan 28, 2025 |
| Priority date | — |
| Expiry date | Oct 30, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2250/095
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An impact power tool includes a housing, a motor, a controller, an impact mechanism configured to be driven by the motor, and an output spindle configured to receive rotational impacts from the impact mechanism to rotate the output spindle. The controller is configured to detect a first impact of the rotational impacts or to detect when the motor speed drops below a speed threshold value. The controller is configured to control the motor to have a first non-zero target rotational speed using closed loop control for a predetermined time period after the first impact is detected or when the motor speed dropping below the speed threshold value is detected. The controller is configured to control the motor to have a second non-zero target rotational speed using the closed loop control after the predetermined time period. The first non-zero target rotational speed is less than the second non-zero target rotational speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.