Patents by Inventor Keiji Murashima

Keiji Murashima 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).

  • Patent number: 6607253
    Abstract: A pair of shoes are expanded by driving an electric brake motor. Due to the friction engagement of the shoes with a drum inner peripheral surface, a braking force is applied to a wheel. An actual braking torque is detected by a strain sensor that detects the load applied to an anchor pin. Through a feedback control using the actual braking torque, the electric motor is driven and controlled so that the actual braking torque becomes equal to a target braking torque that is determined in accordance with the amount of operation of a brake pedal. When the actual braking torque is undetectable, for example, during a stop of a vehicle, the electric motor is driven and controlled through an actuating force control using the current through the electric motor that is detected by a motor current sensor.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: August 19, 2003
    Assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Takayuki Yamamoto, Keiji Murashima, Naoki Sawada