Patents by Inventor Hideharu Aoki

Hideharu Aoki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Piezoelectric actuator of lamination type
    Patent number: 4978881
    Abstract: A piezoelectric actuator of a lamination or stack type has a plurality of sheet-like electrostrictive elements and oppositely poled electrode layers provided on the major surfaces of the each element, respectively, each electrode layer being arranged so as to define an insulating zone on the one end portion of the associated major surface. An insulating gap is formed between the adjacent elements by the insulating zone(s) and is filled with an elastic material.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: December 18, 1990
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Naomasa Wakita, Hideharu Aoki, Makoto Okuda