Patents by Inventor Takayoshi Hatou

Takayoshi Hatou 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).

  • Solenoid valve driving circuit, solenoid valve, and solenoid valve driving method
    Patent number: 8254077
    Abstract: A solenoid valve driving circuit for a solenoid valve includes a current detector for detecting a current that flows in a solenoid coil, a rate of change over time calculating unit for calculating a rate of change over time of the detected current, and a maintaining state transition determining unit for determining a timing at which transition from a first period to a second period occurs based on the calculated rate of change over time.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: August 28, 2012
    Assignee: SMC Kabushiki Kaisha
    Inventors: Yoshihiro Fukano, Shigeharu Oide, Takayoshi Hatou, Hidenori Ogawa
  • SOLENOID VALVE DRIVING CIRCUIT, SOLENOID VALVE, AND SOLENOID VALVE DRIVING METHOD
    Publication number: 20110214741
    Abstract: A solenoid valve driving circuit for a solenoid valve includes a current detector for detecting a current that flows in a solenoid coil, a rate of change over time calculating unit for calculating a rate of change over time of the detected current, and a maintaining state transition determining unit for determining a timing at which transition from a first period to a second period occurs based on the calculated rate of change over time.
    Type: Application
    Filed: August 31, 2010
    Publication date: September 8, 2011
    Applicant: SMC Kabushiki Kaisha
    Inventors: Yoshihiro Fukano, Shigeharu Oide, Takayoshi Hatou, Hidenori Ogawa