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:
Feb. 11, 2014
Filed:
Mar. 02, 2010
James Ching Sik Lau, Hong Kong, CN;
Duncan Yiu Lung Wong, Hong Kong, CN;
Chang Lin Jin, Shenzhen, CN;
Yuen Tung Louie, Hong Kong, CN;
James Ching Sik Lau, Hong Kong, CN;
Duncan Yiu Lung Wong, Hong Kong, CN;
Chang Lin Jin, Shenzhen, CN;
Yuen Tung Louie, Hong Kong, CN;
Johnson Electric S.A., Murten, CH;
Abstract
An electric motor has a pair of brushes for transferring power to windings of a wound rotor by making sliding contact with a cylindrical commutator. Each brush has a body with a pair of end surfaces, and a contact surface extending between the end surfaces and configured to slidingly contact a cylindrical circumferential surface of the commutator. The extending direction of the contact surface is inclined relative to the axial direction of the commutator, and the contact surface is V-shaped when viewed in the extending direction thereof.