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:
Mar. 22, 1988
Filed:
Dec. 15, 1986
Masahiro Nitta, Nara, JP;
Kimiaki Yamaguchi, Nara, JP;
Yoshihiro Toda, Kyoto, JP;
Kazuyuki Inoue, Yamatokoriyama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A high frequency heating device includes a high frequency oscillator, a heating chamber for accommodating an object to be heated, and a cylindrical wave guide for coupling the high frequency oscillator to the heating chamber. The output antenna for the high frequency oscillator is disposed at an input end portion of the cylindrical wave guide and along the center axis of the wave guide. The heating chamber has a wall which is coupled to the cylindrical wave guide, the wall being positioned in an end plane of the cylindrical wave guide opposite to the output antenna. An arcuate slit is formed in the wall with the center of curvature of the slit being centered at the center axis of the cylindrical wave guide. This construction suppresses higher harmonics, and furthermore impedance matching and adjustment of the heating performance are facilitated.