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:
Aug. 30, 2005
Filed:
Feb. 02, 2004
Christopher V. Kurmaniak, Clarkston, MI (US);
Christopher V. Kurmaniak, Clarkston, MI (US);
BorgWarner, Inc., Auburn Hills, MI (US);
Abstract
A clutch having a multiple pole electromagnetic actuator is useful in motor vehicle powertrain components such as transaxles, transfer cases, transmissions, differentials and the like. The electromagnetic actuator includes a stationary coil, a rotating, multiple pole stator and a rotating, multiple pole armature which is linked to the stator. Both the stator and the armature include multiple coils which are electrically connected in pairs. A cam or ball ramp assembly is disposed between the armature and a friction clutch pack. Energization of the stationary coil induces current in the coils of the stator and the respective coils of the armature. The magnetic flux and force generated rotates the armature relative to the stator, thereby actuating the cam or ball ramp assembly, which in turn, compresses the friction clutch pack.