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. 12, 1988
Filed:
Nov. 07, 1985
Masaru Suzuki, Chiryu, JP;
Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi, JP;
Abstract
A shape-memory electromechanical drive device comprising a casing, a pair of fixed terminal members carried by the casing in electrically insulated relation thereto, an actuating member supported within the casing for movement between two positions from an intermediate position in opposite directions and having a pair of spaced spring seats defined therein, and a pair of coil springs interposed between the fixed terminal members and the spring seats, respectively. Each of the coil springs is made of shape-memory alloy and capable of returning from a compressed state to an original, expanded state when heated to a predetermined temperature. These coil springs are heated by the flow of an electric current therethrough one at a time when the device is in use.