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:
Dec. 03, 1985
Filed:
Feb. 27, 1985
Charles D Lemme, Tucson, AZ (US);
Tracy R Lemme, Tucson, AZ (US);
Blazer International Corp., Franklin Park, IL (US);
Abstract
A shape memory metal (SMM) actuator includes an SMM actuator element mounted to an end fitting. An end portion of the actuator element adjacent the end fitting is cold formed to a thickness no more than 40% of the original thickness of the actuator element. This cold formed region extends by about 5 times the diameter of the actuator element away from the end fitting. The cold formed end region remains in the austenitic state, and is therefore relatively hard and strong. For this reason, the tendency of the actuator element to break at the end fitting is reduced, even though the end fitting acts as a temperature sink and maintains the cold formed end region below the transition temperature of the SMM actuator element.