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. 24, 1990
Filed:
Jun. 03, 1988
Shinji Tominaga, Osaka, JP;
Takeshi Hashimoto, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
In a device for driving a shutter having a bimorph element displaceable or deformable by the application of a voltage thereto, and so constructed as to open and close the shutter by using the displacing or deforming effect of the bimorph element, the device comprises a first switching means for short-circuiting the bimorph element at a usual time and a second switching means for releasing the bimorph element from the short-circuited state caused by the first switching means only at the time of opening the shutter and at the same time charging the bimorph element with a voltage from an electric source for the bimorph element, so that the shutter can be surely closed at the usual time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile