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. 10, 2004
Filed:
Apr. 10, 2003
Mark A. Boyer, Harrison, TN (US);
Maytag Corporation, Newton, IA (US);
Abstract
A cooking appliance includes an oven cavity, one or more heat sources for generating hot oven gases within the oven cavity to perform a cooking operation, a controller and a cooling system. The cooling system includes a fan having a drive shaft upon which is mounted a multi-pole magnet. A Hall effect sensor is positioned adjacent to the magnet and provides pulses to the controller. Using the pulses, the controller calculates a speed of the cooling fan. If, during a cooking operation, the controller determines the fan is not operating, the cooking operation is halted. Likewise, if the controller determines the fan is operating at too low a speed, the cooking operation is halted. In either case, a corresponding fault code is generated and stored within the controller.