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:
Dec. 09, 2014
Filed:
Sep. 07, 2012
Yuichi Nishikubo, Kanagawa, JP;
Yuichi Nishikubo, Kanagawa, JP;
Konica Minolta Medical & Graphic, Inc., Tokyo, JP;
Abstract
Object is that an output sound pressure at transmission or an output voltage at reception of a predetermined higher resonance component becomes higher than those of the primary resonance component. The piezoelectric material layerhas an electrode on the surface of the piezoelectric material of between the layer and both ends, and outputs and inputs an electrical signal with this electrode. The piezoelectric materialhas a remanent polarization in a thickness direction, the relationship of the (4P+1)th layer piezoelectric material from fixed end side is used as the basic relationship, piezoelectric materials are periodically arranged so that piezoelectric materials of (4p+2)th and (4p+3)th layer each has an opposite relationship, and (4p+4)th layer has the same relationship as the basic relationship. On the fixed-end side of the piezoelectric material layer, provided is the de-matching layerwith larger acoustic impedance than the piezoelectric material layerfor reflecting vibration propagated from the piezoelectric material layerto the fixed-end side.