Power tools
US6933689B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 2003 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Apr 25, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
It is an object of the invention to provide a technique to effectively prevent a power tool from being adversely affected when a battery is removed from the power tool. According to the present invention, a power tool is provided that includes a tool bit, a motor that drives the tool bit, a body that houses the motor, a battery detachably coupled to the body so as to supply driving current to operate the motor, and a battery removal preventing device. Within the power tool, the battery removal preventing device prevents the battery from being removed from the body during operation of the motor and allows the battery to be removed from the body only when the motor is stopped. As a result, arc can be effectively prevented from being generated between the battery and the body of the power tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.