Patent ID: 9718180
Date: 2017-08-01
CPC Classifications: B25F,H02K

Claim:
1. A power tool comprising: a housing having a first housing portion defining a first air chamber and a first air inlet, a second housing portion defining a second air chamber and a second air inlet, and a third housing portion defining a third air chamber and an air outlet; a motor disposed in the first housing portion; an electronics module disposed in the second housing portion and electrically connected to the motor; a fan disposed in the third housing portion, the fan driven by the motor, wherein 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 ambient airstream and the second ambient airstream from the third air chamber via the air outlet; and a motor cap secured to a front end of the motor, the motor cap including a generally radial wall disposed between the fan and the motor and defining a first cap inlet in communication with the first air chamber to direct first ambient airstream to the fan, and a generally-cylindrical sidewall defining a second cap inlet in communication with the second air chamber to direct air to direct second ambient airstream to the fan.