US 12,237,739 B2
Brushless direct current motor for power tools
Andrew T. Beyerl, Pewaukee, WI (US); Keith Boulanger, Twin Lakes, WI (US); Matthew R. Bailey, Racine, WI (US); and Carl B. Westerby, Menomonee Falls, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Nov. 28, 2023, as Appl. No. 18/521,235.
Application 18/521,235 is a division of application No. 17/410,298, filed on Aug. 24, 2021, granted, now 11,881,750.
Application 17/410,298 is a continuation of application No. 17/095,484, filed on Nov. 11, 2020, granted, now 11,114,927, issued on Sep. 7, 2021.
Application 17/095,484 is a continuation of application No. 15/894,386, filed on Feb. 12, 2018, granted, now 10,848,042, issued on Nov. 24, 2020.
Claims priority of provisional application 62/458,367, filed on Feb. 13, 2017.
Prior Publication US 2024/0097542 A1, Mar. 21, 2024
Int. Cl. H02K 23/02 (2006.01); H02K 1/14 (2006.01); H02K 3/12 (2006.01); H02K 3/34 (2006.01); H02K 7/14 (2006.01); H02K 11/215 (2016.01); H02K 11/33 (2016.01); H02K 29/08 (2006.01); H05K 1/02 (2006.01); H02K 9/00 (2006.01)
CPC H02K 23/023 (2013.01) [H02K 1/146 (2013.01); H02K 3/12 (2013.01); H02K 3/345 (2013.01); H02K 7/145 (2013.01); H02K 11/215 (2016.01); H02K 11/33 (2016.01); H02K 29/08 (2013.01); H05K 1/02 (2013.01); H02K 9/00 (2013.01); H02K 2211/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of manufacturing a brushless electric motor, the method comprising:
providing a stator that includes a core defining a plurality of stator teeth;
positioning a rotor within the stator;
coupling a stator end cap to an end of the core;
winding a plurality of coils on the plurality of stator teeth; and
overmolding a plurality of coil contact plates within the stator end cap, wherein the plurality of coil contact plates short-circuit diagonally opposite coils on the stator.