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:
Oct. 12, 1976
Filed:
Aug. 29, 1974
Bengt Uno Imberg, Norrkoping, SW;
Kurt Hakan Karlsson, Norrkoping, SW;
Gustav Georg Orke, Norrkoping, SW;
U.S. Philips Corporation, New York, NY (US);
Abstract
A sealing arrangement for microwave ovens comprising a quarter wave choke situated in the door and having an entrance opening into the choke in the rim portions of the door, which consists of a door frame, and a suitably perforated metallic door sheet covering the space inside the frame. According to the invention the door frame comprises an integral piece of conductive material having, in section, a generally U-shaped configuration, forming said quarter wave choke, with the outer leg of the U shorter than the inner leg, the door sheet is situated in a plane with the outer end of the inner leg of the U, where it is electrically connected to the said leg. The metallic door sheet extends beyond the inner leg and beyond the shorter, outer leg of the U so that the entrance opening to the inside of the U, forming the cavity of the quarter wave choke, is constituted by the gap between the outer shorter leg of the U and the extension of the metallic door sheet.