US 11,806,857 B2
Airflow intake configuration in power tool
Daniel F. Nace, Towson, MD (US); and James H. Stiles, III, Baltimore, MD (US)
Assigned to BLACK & DECKER, INC., New Britain, CT (US)
Filed by Black & Decker Inc., New Britain, CT (US)
Filed on Aug. 26, 2021, as Appl. No. 17/412,459.
Claims priority of provisional application 63/071,416, filed on Aug. 28, 2020.
Prior Publication US 2022/0063080 A1, Mar. 3, 2022
Int. Cl. B25F 5/00 (2006.01); B24B 23/02 (2006.01); H02K 5/20 (2006.01); H02K 9/06 (2006.01); F16F 1/32 (2006.01)
CPC B25F 5/008 (2013.01) [B24B 23/022 (2013.01); B25F 5/001 (2013.01); H02K 5/20 (2013.01); H02K 9/06 (2013.01); B24B 23/028 (2013.01); F16F 1/32 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power tool comprising:
a housing including a motor case and a handle extending from the motor case;
an electric motor housed within the motor case and rotatably driving a motor spindle;
a gear case mounted on the housing;
an output spindle received at least partially within the gear case and rotatably coupled to the motor spindle, the output spindle and the motor spindle together forming a plane through the housing that intersects a top of the housing;
a fan rotatably fixed to the motor spindle to generate an airflow through the electric motor;
a first air inlet formed in the housing adjacent the electric motor on a first side of the plane, the first air inlet being located along an axial direction between an end of the motor and the gear case; and
a second air inlet formed in the housing adjacent the electric motor on a second side of the plane opposite the first air inlet, the second air inlet being located along the axial direction between the end of the motor and the gear case, wherein the first air inlet is larger than the second air inlet to allow a larger total volume of air to enter the housing and into the electric motor from the first side of the plane than from the second side of the plane.