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:
May. 16, 1989
Filed:
Dec. 22, 1987
Kathumi Ishifuro, Yao, JP;
Kengo Hirata, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A microwave oven having a heater cooking device, a damper operated by the heat in the cooking chamber to control ventilation to the cooking chamber, a blower for cooling the cooking chamber exterior and electric components such as a magnetron, and temperature sensor for detecting the cooking chamber internal temperature. The microwave oven is characterized by a control circuit which actuates the blower immediately when the cooking chamber internal temperature at the time of starting the heater cooking operation is the same as or higher than a specified value considered high enough to actuate the damper and which actuates the ventilator with a delay of a specified time when the cooking chamber internal temperature is lower than the specified value.