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. 09, 1980
Filed:
May. 31, 1978
Hiroshi Minakawa, Fujiidera, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A hot air exhaustion opening is formed in an oven wall of a microwave oven. A heat-sensitive film is disposed at the hot air exhaustion opening to close the hot air exhaustion opening when the microwave oven is in the normal operation mode. When the oven cavity temperature rises to an abnormal value, the heat-sensitive film is fused to conduct hot air toward the outside of the microwave oven cavity through the hot air exhaustion opening. A heat-sensitive fuse is disposed on the downstream side of the heat-sensitive filter film so that the heat-sensitive fuse receives the hot air exhausted through the hot air exhaustion opening when the heat-sensitive film is fused. The heat-sensitive fuse is associated with a microwave generation control circuit so that the microwave generation is suppressed when the oven cavity temperature rises to the abnormal value.