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. 20, 1993
Filed:
Sep. 30, 1991
Bradford W Petot, Cleveland Hts., OH (US);
Douglas Herndon, Ashtabula, OH (US);
Design & Manufacturing Corporation, Willoughby, OH (US);
Abstract
An electrothermal actuator for converting electrical energy to rotational mechanical motion includes a housing, a flexible diaphragm disposed in the housing and defining a boiler chamber within the housing, a working fluid disposed within the boiler chamber and changing phase in response to heating, thereby displacing the diaphragm, a heater disposed within the boiler chamber for heating the working fluid in response to an electrical current flowing through the heater, and a rotatable shaft assembly partially disposed within the housing and including a rotating shaft extending outside the housing, rotating between a return position and a rotated position, and a driver for rotating the shaft from the return position toward a rotated position in response to heating of the working fluid, displacing the diaphragm.