Patents by Inventor Tetsurou Shimizu

Tetsurou Shimizu 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 power steering device and shaft coupler used therefor
    Patent number: 9434405
    Abstract: A shaft coupler that couples a worm shaft and an output shaft of an electric motor in an electric power steering device includes a joint on a motor side that is connected to the output shaft, a joint on a worm side that is connected to the worm shaft, and a coupling that is provided between the joints and that is for transmitting rotational torque of the electric motor to the worm shaft. The joint on the motor side and the joint on the worm side, each having a plurality of protrusion parts that extend in an axial direction, are arranged so that the protrusion parts are aligned alternately in a circumferential direction. The coupling is formed by a plurality of caps that are fitted to the protrusion parts of the joint on the motor side or the joint on the worm side.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: September 6, 2016
    Assignee: KYB Corporation
    Inventors: Shinraku Yoshikawa, Tetsurou Shimizu, Katsumi Shimoda
  • ELECTRIC POWER STEERING DEVICE AND SHAFT COUPLER USED THEREFOR
    Publication number: 20150041241
    Abstract: A shaft coupler that couples a worm shaft and an output shaft of an electric motor in an electric power steering device includes a joint on a motor side that is connected to the output shaft, a joint on a worm side that is connected to the worm shaft, and a coupling that is provided between the joints and that is for transmitting rotational torque of the electric motor to the worm shaft. The joint on the motor side and the joint on the worm side, each having a plurality of protrusion parts that extend in an axial direction, are arranged so that the protrusion parts are aligned alternately in a circumferential direction. The coupling is formed by a plurality of caps that are fitted to the protrusion parts of the joint on the motor side or the joint on the worm side.
    Type: Application
    Filed: February 4, 2013
    Publication date: February 12, 2015
    Inventors: Shinraku Yoshikawa, Tetsurou Shimizu, Katsumi Shimoda