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. 17, 1991
Filed:
Jul. 18, 1990
Shigeru Jomura, Tokyo, JP;
Junichi Watanabe, Saitama, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A laminate-type displacement element comprising a plurality of thin plates made of an electromechanical conversion material laminated alternately with internal electrodes which cover substantial portions of said thin plates to form a laminate; a pair of external electrodes connected to said internal electrodes on both sides of said laminate; and a buffer portion extending between a non-deflecting portion located in the vicinity of each side surface of said laminate and a deflecting portion located within said laminate, said buffer portion having a deflection amount which increases gradually from 0% at a position adjacent to the non-deflecting portion to 100% at a position adjacent to the deflecting portion.