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:
Dec. 08, 1981
Filed:
Feb. 19, 1980
Nobuo Ikeda, Nara, JP;
Hirofumi Yoshimura, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A heating appliance such as a stove which has a high frequency and resistance heater therein. A high frequency oscillator supplies frequency radiation energy through a waveguide extending to a energy feeding port in the heating chamber, and a rotary antenna extends through the energy feeding port for directing the high frequency energy into the heating chamber. A motor rotates the antenna, a heater of a type other than a high frequency heater, such as a resistance heater, is in the heating chamber substantially parallel with the wall of the heating chamber in which the energy feeding port is positioned. The rotary antenna has substantially an L shape with a longitudinal section extending from the waveguide into the heating chamber through the energy feeding port, the portions of the longitudinal section within the heating chamber from the wall in which the energy feeding port is positioned to the inner end thereof having a length substantially equal to one quarter the wavelength of the high frequency energy, and a lateral section connected to the longitudinal section at a point intermediate the length thereof within the heating chamber at a point between the wall of the heating chamber and the resistance heater.