Electric power tool
US8627900B2 · kind B2 · utility
39Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 2009 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | May 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric power tool (1) includes a brushless direct-current motor (3) and a drive circuit that supplies drive power to the motor, the power tool rotates or drives a tool, whereby the drive circuit includes plural switching elements (21), and is arranged on a board (9) provided in a grip portion of a housing or below the grip portion; and an electric fan (22) is provided in the vicinity of the switching element for cooling the switching element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.