Power tool having improved motor and controller cooling
US9718180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2014 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Aug 10, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power tool includes a motor housing defining a first air chamber with a first air inlet that receives a motor. A handle extending from the motor housing defines a second air chamber with a second air inlet that receives an electronics control module. A third air chamber with an air outlet receives a fan coupled to the motor output shaft. The fan: (a) pulls a first ambient airstream through the first air chamber from the first air inlet and into the third air chamber, bypassing the second air chamber, to cool the motor; (b) pulls a second ambient airstream through the second air chamber from the second air inlet and into the third air chamber, bypassing the first air chamber, to cool the electronics module; and (c) exhausts the first and second airstreams from the third air chamber via the air outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.