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:
Sep. 03, 2013
Filed:
Sep. 11, 2008
Masatoshi Higashi, Hokkaido, JP;
Masatoshi Higashi, Hokkaido, JP;
Toshiba Hokuto Electronics Corporation, Asahikawa-shi, Hokkaido, JP;
Abstract
A magnetron for microwave oven has an anode cylinder, vanes (height: H (mm)), a cathode spirally extending along the central axis, a pair of end hats (outer diameter: DEH(mm), DEH(mm)) fixed to both ends of the cathode, and a pair of pole pieces. Vanes extend from an inner surface of the anode cylinder to the central axis. Free ends of the vanes form a vane inscribing circle (diameter: Da (mm)). Pole pieces expand like funnels from through-holes (inner diameter: DPP(mm), DPP(mm)) facing to the end hats and pinch the cathode. The shape of the magnetron satisfies, H≦8.5, H/Da≦0.95, DEH/DPP≦0.8, DEH/DPP≦0.8, DEH/DPP≦0.8, DEH/DPP≦0.8, 0.92≦Da/DPP≦0.95, and 0.92≦Da/DPP≦0.95.