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:
Aug. 23, 2005
Filed:
Oct. 16, 2002
Charles E. Seeley, Niskayuna, NY (US);
Todd G. Wetzel, Niskayuna, NY (US);
Andrew J. Calver, Clifton Park, NY (US);
Jeffrey B. Fortin, Niskayuna, NY (US);
Keith B. Fosen, Orlando, FL (US);
Charles E. Seeley, Niskayuna, NY (US);
Todd G. Wetzel, Niskayuna, NY (US);
Andrew J. Calver, Clifton Park, NY (US);
Jeffrey B. Fortin, Niskayuna, NY (US);
Keith B. Fosen, Orlando, FL (US);
Lockheed Martin Corporation, Bethesda, MD (US);
Abstract
A piezoelectric actuator and a method of assembling and employing a piezoelectric actuator. This method comprises the steps of positioning an expandable piezoelectric material inside a case, and enclosing a vaporizable liquid in the case. The case is positioned in a high temperature environment; and the liquid vaporizes, in that high temperature environment, over a given period of time, to maintain the temperature of the piezoelectric material below a given value for said period of time. Preferably, the vaporizing liquid maintains the temperature of the piezoelectric material substantially constant over that period of time. Also, preferably the case is provided with a pressure responsive valve that opens and closes, in the high temperature environment, to expose the liquid to that environment and control the vaporization of the liquid to maintain the temperature of the piezoelectric material substantially constant over the period of time.