Patents by Inventor Haruo Isioka

Haruo Isioka 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).

  • Multilayer-type piezoelectric actuator
    Patent number: 6522052
    Abstract: A multilayer-type piezoelectric actuator having a multilayer piezoelectric unit which is capable of enduring the extension of contraction thereof to prevent the disconnection of external electrodes. The multilayer piezoelectric unit (2) includes a plurality of piezoelectric plates (21) of a piezoelectric material and a plurality of internal electrodes (22) of a conductive material arranged in alternate layers. The external electrodes (3) are arranged on the side surfaces (23), respectively, of the multilayer piezoelectric unit (2) and electrically connected to a plurality of the internal electrodes (22). The external electrodes (3) are each configured of an electrode base (31) arranged in contact with a corresponding side surface (23) of the multilayer piezoelectric unit (2), a tabular metal net conductor (32) arranged on the electrode base (31), and a plurality of conductive adhesives (33) for partially bonding the electrode base (31) and the tabular metal net conductor (32).
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: February 18, 2003
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Noriaki Kihara, Toshihiko Ito, Haruo Isioka, Atsushi Murai
  • Multilayer-type piezoelectric actuator
    Publication number: 20020043901
    Abstract: A multilayer-type piezoelectric actuator having a multilayer piezoelectric unit which is capable of enduring the extension of contraction thereof to prevent the disconnection of external electrodes. The multilayer piezoelectric unit (2) includes a plurality of piezoelectric plates (21) of a piezoelectric material and a plurality of internal electrodes (22) of a conductive material arranged in alternate layers. The external electrodes (3) are arranged on the side surfaces (23), respectively, of the multilayer piezoelectric unit (2) and electrically connected to a plurality of the internal electrodes (22). The external electrodes (3) are each configured of an electrode base (31) arranged in contact with a corresponding side surface (23) of the multilayer piezoelectric unit (2), a tabular metal net conductor (32) arranged on the electrode base (31), and a plurality of conductive adhesives (33) for partially bonding the electrode base (31) and the tabular metal net conductor (32).
    Type: Application
    Filed: December 27, 2001
    Publication date: April 18, 2002
    Inventors: Noriaki Kihara, Toshihiko Ito, Haruo Isioka, Atsushi Murai