The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2012
Filed:
Aug. 28, 2009
Abraham G. Gebregergis, Saginaw, MI (US);
Jeffrey Beyerlein, Frankenmuth, MI (US);
Christian Ross, Hemlock, MI (US);
Troy P. Strieter, Sebewing, MI (US);
Abraham G. Gebregergis, Saginaw, MI (US);
Jeffrey Beyerlein, Frankenmuth, MI (US);
Christian Ross, Hemlock, MI (US);
Troy P. Strieter, Sebewing, MI (US);
Steering Solutions IP Holding Corporation, Saginaw, MI (US);
Abstract
A method for reducing current and torque ripple in a brushed electric motor is disclosed. The motor includes a stator and a rotor. The stator includes a brush housing having a plurality of circumferentially spaced brushes disposed about a commutator, each brush having a contact face that is in electrical contact with the commutator, an opposed bias face and a peripheral wall, each brush disposed in a brush pocket having a pocket wall, a base and a bias spring that is configured to apply a contact force to the bias face, thereby urging the contact face into electrical contact with the commutator. The method includes inserting a damper between each pocket wall or respective base and the respective brush.