Patents by Inventor Katsuhiro Asami

Katsuhiro Asami 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).

  • Throttle valve control apparatus using DC torque motor
    Patent number: 6320285
    Abstract: A throttle valve control apparatus includes a throttle valve, a DC torque motor for driving the throttle valve, the DC torque motor including a stator with coil wound therearound, and a needle including permanent magnets, the needle being rocked within a predetermined working angle range, wherein a magnetic path is formed within the stator, and a magnetic flux quantity is generated within the stator when current flows in the permanent magnets and the coil, wherein a magnetic flux is not saturated while the working angle of the needle is in a repulsion region where the needle repulses the stator and the magnetic flux is saturated while the working angle of the needle is in an attraction region where the needle is attracted to the stator, a throttle opening sensor for outputting information regarding an opening of the throttle valve, and a controller which controls the dc torque motor when receiving signals from the throttle opening sensor.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: November 20, 2001
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Yoshiki Ito, Katsuhiro Asami
  • DC torque motor, and drive control apparatus and throttle valve control apparatus using DC torque motor
    Patent number: 6153952
    Abstract: A small-sized, light-weight DC torque motor with good response characteristics. The motor is a moving magnet type DC torque motor rockable in a rocking angle of 0=45 to 135 degrees.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: November 28, 2000
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Yoshiki Ito, Katsuhiro Asami