Patents by Inventor Akira Hukami

Akira Hukami 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).

  • Drive system of actuator having piezoelectric device for use in motor vehicle
    Patent number: 5013955
    Abstract: A drive system of a piezo-type actuator for use in a motor vehicle, which piezo-type actuator is constructed with a piezoelectric device which is expandable and contractible in accordance with application of a voltage thereto. The drive system includes a voltage-increasing section for increasing an output voltage of a power source mounted on the motor vehicle so as to develop a drive voltage for the piezo-type actuator and a voltage-application section for applying to the piezoelectric device of the piezo-type actuator the drive voltage. Also included in the drive system is an abnormality detection section which is arranged so as to an abnormality of the drive voltage developed by the voltage-increasing section.
    Type: Grant
    Filed: June 7, 1990
    Date of Patent: May 7, 1991
    Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshimichi Hara, Eiju Matsunaga, Hiroyuki Kawata, Akira Hukami, Yutaka Suzuki, Makoto Shiozaki, Yuji Yokoya, Yasuhiro Tsutsumi