Patents by Inventor Shintarou Oku

Shintarou Oku 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).

  • Electric drive system for vehicle, electric control system for vehicle, electric drive method for vehicle
    Patent number: 7841434
    Abstract: In an electric drive system for a vehicle, an alternator is driven by an engine to generate electric power which is used to drive a motor to generate a driving force. During a retardation of the vehicle, the motor is operated as an alternator to convert kinetic energy to electric energy which is used to retard the vehicle. A retard resistor is provided for absorbing electric energy generated during the retardation state. The retard resistor is cooled down by an AC blower.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: November 30, 2010
    Assignees: Hitachi, Ltd., Hitachi Construction Machinery Co., Ltd.
    Inventors: Keizo Shimada, Yasuhiro Kiyofuji, Naoshi Sugawara, Kazuhiro Imaie, Shintarou Oku, Takashi Yagyu
  • ELECTRIC DRIVE SYSTEM FOR VEHICLE, ELECTRIC CONTROL SYSTEM FOR VEHICLE, ELECTRIC DRIVE METHOD FOR VEHICLE
    Publication number: 20090218966
    Abstract: In an electric drive system for a vehicle, an alternator is driven by an engine to generate electric power which is used to drive a motor to generate a driving force. During a retardation of the vehicle, the motor is operated as an alternator to convert kinetic energy to electric energy which is used to retard the vehicle. A retard resistor is provided for absorbing electric energy generated during the retardation state. The retard resistor is cooled down by an AC blower.
    Type: Application
    Filed: May 11, 2009
    Publication date: September 3, 2009
    Inventors: Keizo SHIMADA, Yasuhiro Kiyofuji, Naoshi Sugawara, Kazuhiro Imaie, Shintarou Oku, Takashi Yagyu
  • Electric drive system for vehicle, electric control system for vehicle, electric drive method for vehicle
    Publication number: 20060086547
    Abstract: In an electric drive system for a vehicle, an alternator is driven by an engine to generate electric power which is used to drive a motor to generate a driving force. During a retardation of the vehicle, the motor is operated as an alternator to convert kinetic energy to electric energy which is used to retard the vehicle. A retard resistor is provided for absorbing electric energy generated during the retardation state. The retard resistor is cooled down by an AC blower.
    Type: Application
    Filed: December 9, 2005
    Publication date: April 27, 2006
    Inventors: Keizo Shimada, Yasuhiro Kiyofuji, Naoshi Sugawara, Kazuhiro Imaie, Shintarou Oku, Takashi Yagyu