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:
Oct. 16, 2001
Filed:
Mar. 02, 2000
Chad E. Fair, Madison Heights, MI (US);
Loren D. Isley, Jr., Clarkston, MI (US);
Lyle Croo, Dearborn Heights, MI (US);
BorgWarner Inc., Troy, MI (US);
Abstract
An electromagnetic clutch assembly for transfer cases and other motor vehicle powertrain applications includes a friction disc clutch pack and an electromagnetic operator that applies compressive force to the clutch pack. The electromagnetic operator includes an electromagnetic coil, a rotor partially surrounding the coil, an armature and a ball ramp operator assembly that provides compressive force when the coil is energized. The rotor and armature include aligned paths or tracks of arcuate slots separated by webs or spokes which create a sinuous magnetic flux path and improve performance. The number of slots and thus the number of spokes in the rotor and armature paths are unequal. This inequality greatly reduces pulsations caused by small fluctuations in clutch engagement associated with the repeated, simultaneous alignment and non-alignment of the spokes in a rotor and armature having equal numbers of spokes. This results in improved smoothness of operation and reduces noise and vibration.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile