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:
Apr. 21, 1987
Filed:
Mar. 25, 1986
Kimiaki Yamaguchi, Ikoma, JP;
Masahiro Nitta, Nara, JP;
Kazuyuki Inoue, Yamatokoriyama, JP;
Teruo Hirose, Hirakata, JP;
Yoshihiro Toda, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An electromagnetic energy seal for use in a microwave oven comprises a first sealing cavity formed along at least one of a peripheral edge portion of an entrance opening of a heating chamber and a portion of a door for opening and closing the entrance opening of the heating chamber which is opposite to the peripheral edge portion of the entrance opening of the heating chamber, and a second sealing cavity disposed in the opening of the first sealing cavity. These first and second sealing cavities have a simple structure which produces high shield effects against the fundamental microwave frequency and the higher harmonic microwave frequency components thereof, respectively, and the adjustment and optimization of the choking frequency characteristics of the cavities can be made easy.