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:
Jul. 03, 2001
Filed:
Nov. 03, 1999
Hong Tsai, Farmington Hills, MI (US);
Youqing Xiang, Canton, MI (US);
Visteon Global Technologies, Inc., Dearborn, MI (US);
Abstract
An eddy current brake having an electromagnetic pole and a rotor journalled for rotation in a torque delivery shaft of an automotive vehicle driveline, the rotor being rotatably positioned in close proximity to the stator with an air gap between them. The stator comprises steel pole pieces with hollow cores that establish a magnetic circuit for a magnetic flux field. The pole pieces have machine-wound electrical windings. The windings are fastened with pole caps. The hollow core reduces the weight and material of the stator without significantly adversely affecting the braking capacity of the retarder brake for any given speed of rotation of the rotor and for any given number of ampere-turns for the stator windings. The pole caps reduce the magnetic saturation and increases the overall brake torque output.