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:
Feb. 26, 1985
Filed:
Sep. 24, 1981
Jerome C Schutzler, Orange County, CA (US);
PDA Engineering, Santa Ana, CA (US);
Abstract
The following specification discloses the use of a nickel titanium alloy component referred to as Nitinol for purposes of providing a pre-stressed structure. The alloy component provides stiffness to shell structures and tubular members such as oil well pipes, and conduits, as well as pre-stressed loadings for head bolts on engines or other pre-stressed fasteners. Pre-stressing is accomplished by deforming the Nitinol component below its transformation temperature which can be a cryogenic temperature, after which the Nitinol component returns by its memory to a desired shape for pre-stressing. The foregoing develops a large pre-load on a structural joint, so that successful design applications of Nitinol can pre-load joints with minimum load path offset for a shell or other structure. This minimizes in-plane local moments, as well as eccentric loading, and provides joints of lower weight and less internal volume protrusion.