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:
Dec. 11, 2007
Filed:
Jun. 29, 2004
Ratko Menjak, Frankenmuth, MI (US);
Steven J. Collier-hallman, Frankenmuth, MI (US);
Karen A. Boswell, Freeland, MI (US);
Damir Menjak, Frankenmuth, MI (US);
Ratko Menjak, Frankenmuth, MI (US);
Steven J. Collier-Hallman, Frankenmuth, MI (US);
Karen A. Boswell, Freeland, MI (US);
Damir Menjak, Frankenmuth, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A vehicle steering device may include a rotatable input shaft, a motor in communication with an input augmentation shaft, the input augmentation shaft and the input shaft sharing a longitudinal axis, and the motor further having a stator stationary with respect to rotation of the input shaft. The vehicle steering device may further include a differential mechanism for providing variable ratio steering to the steering device. The differential mechanism may be a harmonic drive differential or a planetary gearing system. In one embodiment, an external wave generator may be used within the harmonic drive differential gearing mechanism. The vehicle steering device may include a sensorless synchronous machine.