Electric power tool
US12068708B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2019 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Apr 20, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric power tool includes: a motor; a driving circuit configured to drive the motor to output motive power; a control module configured to control the driving circuit; an energy storage element connected to the driving circuit; a current limiting element connected in series with the energy storage element and configured to charge the energy storage element with a first current; a switching element electrically connected in series with the energy storage element, connected in parallel with the current limiting element, and configured to charge or discharge the energy storage element with a second current. The electric power tool can avoid the occurrence of adverse situations such as generating electric sparks at the connection terminals of the electric power tool and of a battery pack when the battery pack is inserted into the electric power tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.