Patents by Inventor Akira Shimadu

Akira Shimadu 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).

  • Valve timing control apparatus
    Patent number: 7500455
    Abstract: In a guide groove of a guide rotator of a valve timing control apparatus, a stopper surface is planar and is positioned in an end of the guide groove. The stopper surface is engageable with a cylindrical outer peripheral surface of a movable body, which is received in the guide groove, to stop the movable body. An arcuate outer connection surface connects between the stopper surface and an outer guide surface and has a radius of curvature, which is smaller than that of the cylindrical outer peripheral surface of the movable body. An arcuate inner connection surface connects between the stopper surface and an inner guide surface and has a radius of curvature, which is smaller than that of the cylindrical outer peripheral surface of the movable body.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: March 10, 2009
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Shigeyuki Kusano, Akira Shimadu, Eiji Isobe, Takayuki Inohara
  • Valve timing control apparatus
    Publication number: 20070215103
    Abstract: In a guide groove of a guide rotator of a valve timing control apparatus, a stopper surface is planar and is positioned in an end of the guide groove. The stopper surface is engageable with a cylindrical outer peripheral surface of a movable body, which is received in the guide groove, to stop the movable body. An arcuate outer connection surface connects between the stopper surface and an outer guide surface and has a radius of curvature, which is smaller than that of the cylindrical outer peripheral surface of the movable body. An arcuate inner connection surface connects between the stopper surface and an inner guide surface and has a radius of curvature, which is smaller than that of the cylindrical outer peripheral surface of the movable body.
    Type: Application
    Filed: March 19, 2007
    Publication date: September 20, 2007
    Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Shigeyuki Kusano, Akira Shimadu, Eiji Isobe, Takayuki Inohara