Patents by Inventor Masatoshi Kuwata

Masatoshi Kuwata 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).

  • Pulse actuated hydraulic pump
    Patent number: 4773218
    Abstract: A pulse-actuated hydraulic pump includes a hydraulic chamber with a bellows having a volume increased or decreased by the selective application a force in an axial direction thereof by a piezoelectric actuator. Control means control electrically-driven valves to selective discharge fluid from the bellows in precisely controllable volumes through a first pumping port or a second pumping port.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: September 27, 1988
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Naomasa Wakita, Kanji Ohya, Masatoshi Kuwata, Shuzo Hattori, Makoto Okuda