US 11,791,687 B2
Battery-powered stand-alone motor unit
Connor P. Sprague, Milwaukee, WI (US); Evan M. Glanzer, Milwaukee, WI (US); and John E. Koller, Brookfield, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Dec. 23, 2020, as Appl. No. 17/132,754.
Claims priority of provisional application 62/952,563, filed on Dec. 23, 2019.
Prior Publication US 2021/0194316 A1, Jun. 24, 2021
Int. Cl. H02K 7/14 (2006.01); H02K 7/00 (2006.01); H02K 7/116 (2006.01); H02K 21/16 (2006.01); H02K 11/00 (2016.01); H02K 11/33 (2016.01); H02K 9/22 (2006.01)
CPC H02K 7/003 (2013.01) [H02K 7/116 (2013.01); H02K 9/227 (2021.01); H02K 11/0094 (2013.01); H02K 11/33 (2016.01); H02K 21/16 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A stand-alone motor unit for use with a piece of power equipment, the motor unit comprising:
a housing;
a flange coupled to the housing on a first side thereof;
a slot in the flange, the slot configured to receive a protrusion of the piece of power equipment;
an electric motor located within the housing;
a power take-off shaft receiving torque from the motor and protruding from a second side of the housing adjacent the first side; and
a battery pack to provide power to the motor;
wherein the slot includes a first portion having a first surface width at the outer surface of the flange and a first base width at the base of the slot,
wherein the slot includes a second portion having a second surface width at the outer surface of the flange, and a second base width at the base of the slot, and
wherein the second surface width is less than the first surface width and the second base width.