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:
Nov. 07, 2017
Filed:
Mar. 14, 2014
Ngk Insulators, Ltd., Nagoya-Shi, JP;
Ngk Ceramic Device Co., Ltd., Komaki-Shi, JP;
Takashi Ebigase, Nagoya, JP;
Koji Katsu, Tajimi, JP;
NGK Insulators, Ltd., Nagoya, JP;
NGK Ceramic Device Co., Ltd., Komaki-Shi, JP;
Abstract
A piezoelectric/electrostrictive ('PE') actuator includes a PE element including a laminated object having a PE layer and a pair of electrodes arranged respectively on both sides of the PE layer, and having an operating part corresponding to the portion in which the PE layer is sandwiched between the pair of electrodes and a non-operating part corresponding to the portion in which the PE layer is not sandwiched between the pair of electrodes, and a moisture-proof film covering at least the vicinity of a boundary between the operating part and the non-operating part, consisting of a liquid with a saturated moisture content at 25 degree Celsius of 300 ppm or less and a withstand voltage at the saturated moisture content of not less than 6 kV/mm. The liquid contains hydrocarbon system organic compound having a main backbone of carbon-carbon bond and consisting only of carbon and hydrogen.