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:
Jan. 17, 1989
Filed:
Feb. 25, 1987
Ikuyasu Kaminaka, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A microwave oven includes a heating chamber in which food is heated, a high frequency heating circuit for supplying high frequency energy to the heating chamber, a thermal heater provided in each of the upper and lower areas of the heating chamber, a switching circuit for selecting the high frequency heating circuit or the thermal heaters, a first switching circuit for permitting intermittent power to the high frequency heating circuit when the high frequency heating circuit is selected by the switching circuit, a second switching circuit connected in parallel with the first switching circuit so as to provide a bypass of the first switching circuit when closed, a first contact mounted in the first switching circuit to permit intermittent power supply to one of the two thermal heaters in the heating chamber, and a second contact mounted in the second switching circuit to provide a bypass of the first contact.