US 12,266,987 B1
Rotating brushes for electric motors
Larry A. Burchfield, West Richland, WA (US)
Appl. No. 18/854,247
Filed by Larry A. Burchfield, West Richland, WA (US)
PCT Filed Apr. 19, 2023, PCT No. PCT/US2023/065936
§ 371(c)(1), (2) Date Oct. 4, 2024,
PCT Pub. No. WO2023/205679, PCT Pub. Date Oct. 26, 2023.
Claims priority of provisional application 63/363,311, filed on Apr. 20, 2022.
Int. Cl. H02K 13/10 (2006.01); H01R 39/04 (2006.01); H02K 1/18 (2006.01); H02K 7/08 (2006.01); H02K 7/10 (2006.01); H02K 13/00 (2006.01)
CPC H02K 13/006 (2013.01) [H02K 1/18 (2013.01); H02K 7/08 (2013.01); H02K 7/10 (2013.01); H02K 13/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A rotating brush assembly for an electric motor, comprising:
a commutator; and
first and second brushes, each rotatingly mounted on an axle disposed between arms coupled to respective first and second brush holders;
wherein said brush holders are urged toward said commutator with a spring; and
further wherein said first and second brushes rotate in a direction opposite the direction in which said commutator rotates;
wherein said first and second brushes are cylindrical and said commutator is cylindrical; and
wherein said first and second brushes each include arcuate surface elements that engage complementary arcuate surface elements on said commutator so as to match rotation rates of said first and second brushes and to prevent slippage of said first and second brushes relative to said commutator during rotation.