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. 27, 1982
Filed:
Jul. 29, 1980
Nobuo Ikeda, Nara, JP;
Hirofumi Yoshimura, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
There is disclosed an energy feeding device for installation in a high frequency heating appliance which includes a heating chamber, a high frequency oscillator for supplying a high frequency energy to the heating chamber, a waveguide for transmitting the high frequency electromagnetic wave generated from the high frequency oscillator, and a rotary antenna for radiating the high frequency electromagnetic wave so transmitted by the waveguide into the heating chamber. The rotary antenna has a revolving drive shaft, made of a material with a low dielectric loss and is connected to a drive source, a metal pipe which is connected to the revolving drive shaft at its socket end. The socket end of the metal pipe is expanded and rounded off, thereby substantially preventing sparking under light load.