Patents by Inventor Yuuji Shimamoto

Yuuji Shimamoto 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).

  • Noise reduction electric power steering apparatus
    Patent number: 7591341
    Abstract: An electric power steering apparatus is provided with a worm which is a driving gear interlocked with an electric motor for assisting steering, and a worm wheel which is a driven gear having an annular teeth body made of synthetic resin meshing with the worm and a metallic core body coupling the annular teeth body and is attached to the steering shaft. Protrusions are provided on a side surface of the annular teeth body in a face width direction at a plurality of circumferential positions from which a distance to a center of rotation is different from each other, and stirred lubricating fats and oils applied around the worm wheel. As a result, the lubricating fats and oils can be moved to between tooth surfaces of a meshing portion between the worm and worm wheel.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: September 22, 2009
    Assignee: JTEKT Corporation
    Inventors: Yuuji Shimamoto, Keizo Arita, Kouji Kitahata, Naoki Uchida
  • Electric power steering apparatus
    Publication number: 20070193820
    Abstract: An electric power steering apparatus is provided with a worm which is a driving gear interlocked with an electric motor for assisting steering, and a worm wheel which is a driven gear having an annular teeth body made of synthetic resin meshing with the worm and a metallic core body coupling the annular teeth body and is attached to the steering shaft. Protrusions are provided on a side surface of the annular teeth body in a face width direction at a plurality of circumferential positions from which a distance to a center of rotation is different from each other, and stirred lubricating fats and oils applied around the worm wheel. As a result, the lubricating fats and oils can be moved to between tooth surfaces of a meshing portion between the worm and worm wheel.
    Type: Application
    Filed: January 23, 2007
    Publication date: August 23, 2007
    Applicant: JTEKT Corporation
    Inventors: Yuuji Shimamoto, Keizo Arita, Kouji Kitahata, Naoki Uchida