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:
Nov. 02, 2004
Filed:
Mar. 26, 2003
Dennis A. Kramer, Troy, MI (US);
Dale K. Bell, Ortonville, MI (US);
Clive Harrup, Bromham, GB;
Mehmet S. Ciray, Glenwood, IN (US);
Silvio M. Yamada, Waterford, MI (US);
Dean M. House, Pataskala, OH (US);
David K. Platner, Shelby, MI (US);
Dale J. Eschenburg, Clinton Township, MI (US);
ArvinMeritor Technology, LLC, Troy, MI (US);
Abstract
A vehicle drive assembly includes an electric motor directly coupled to a rotatable member for driving a wheel, for example, without gear reduction assemblies between the motor output and the driven wheels. A multi-phase, high pulse current stepper motor is used as the motor in one example. A driven wheel is supported by a wheel mounting member in a conventional fashion. A rotatable member associated with the wheel mounting member is directly coupled to an output of the stepper motor. The stepper motor can selectively operate in several modes. A first mode provides driving torque to the vehicle wheels, a second mode provides a braking force and an optional third mode allows the stepper motor to serve as a parking brake.