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. 06, 2013
Filed:
Nov. 27, 2008
Tetsuro Sata, Kirishima, JP;
Masahiro Sato, Kirishima, JP;
Tetsuro Sata, Kirishima, JP;
Masahiro Sato, Kirishima, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A multi-layer piezoelectric element that has high durability with capability to operable continuously under higher voltage and higher pressure over a long period of time, a method for manufacturing the same, an injection apparatus and a fuel injection system are provided. The multi-layer piezoelectric element, comprising: a multi-layer structure comprising a plurality of internal electrode layers and a plurality of piezoelectric material layers, the plurality of piezoelectric material layers being stacked with each one of the plurality of internal electrode layers intervened between each two of the plurality of piezoelectric material layers, wherein a cross-sectional area of a cross section of the multi-layer structure parallel to the plurality of internal electrode layers is smaller in both end portions in a stacked direction than in a middle portion in the stacked direction.