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. 06, 2009
Filed:
Mar. 07, 2006
Control for an electromagnetic brake for a multiple-ratio power transmission in a vehicle powertrain
Michael J. Hornbrook, Butler, IN (US);
Michael J. Hornbrook, Butler, IN (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A control system for an electromagnetic brake, including an electromagnetic brake actuator coil surrounding a power input shaft for a multiple-ratio transmission in a vehicle powertrain. An electromagnetic flux flow path for the actuator coil is electromagnetically isolated from the power input shaft and other elements of the powertrain thereby avoiding residual magnetization. A thermally responsive circuit protector is provided in the coil circuit that senses the temperature of the stator coil to avoid overheating of the stator coil. An overcurrent protector is provided for opening the stator coil circuit when current in the stator coil exceeds a predetermined value.