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:
Jun. 13, 1989
Filed:
Apr. 13, 1983
Applicant:
Inventor:
Masanobu Tanigawa, Ikoma, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219 / ; 219 / ; 219 / ; 16 82 ;
Abstract
A damper mechanism of a microwave oven using shape memory alloy spring elements for opening and/or closing the damper which, in turn, control the flow of air through an inlet port into the chamber. The damper mechanism is designed for extending the service lives of the shape memory alloy spring elements as well as an energy saving substitute for the power otherwise needed for driving the damper unit.