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:
Jan. 17, 1989
Filed:
Jun. 20, 1988
Applicant:
Inventor:
Eugene B Foote, Seattle, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
F03G / ;
U.S. Cl.
CPC ...
60527 ; 60529 ;
Abstract
A rotary actuator with tailored torque output comprises a shape memory alloy rod or tube encased within or filled with a burnable chemical grain. In its initial state, the rod or tube has zero degree rotation about its longitudinal axis. The rod or tube is then rotated or twisted about its longitudinal axis when the shape memory alloy is in a malleable state. The rod or tube may be progressively, selectively heated by the burning of the chemical grain to cause the shape memory alloy to return locally to its original shape with the consequence that a free end of the rod or tube is rotated.