Patents by Inventor Tatsunori Mita

Tatsunori Mita 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).

  • Yoke for a cross type universal joint and manufacturing method thereof
    Patent number: 8845438
    Abstract: A yoke is provided in which damage such as bending of a bolt for joining and fastening the base section of the yoke to the end section of a rotating shaft does not easily occur even when that bolt is excessively tightened. In the present invention, a force is applied to both a first flange section and a second flange section in a direction toward each other, and with the inner diameter of the base section elastically reduced, a through hole, screw hole and seating surface section are formed. After that, the force is released and the inner diameter of the base section expands by its own elastic force. Alternatively, with the inner diameter of the base section reduced, the through hole, screw hole and seating surface section are formed, after which the first flange section and second flange section are plastically deformed in the direction away from each other to expand the inner diameter of the base section.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: September 30, 2014
    Assignee: NSK Ltd.
    Inventors: Seiichi Moriyama, Tatsunori Mita, Taishi Shigeta
  • Yoke for a Cross Type Universal Joint and Manufacturing Method Thereof
    Publication number: 20130017892
    Abstract: A yoke is provided in which damage such as bending of a bolt for joining and fastening the base section of the yoke to the end section of a rotating shaft does not easily occur even when that bolt is excessively tightened. In the present invention, a force is applied to both a first flange section and a second flange section in a direction toward each other, and with the inner diameter of the base section elastically reduced, a through hole, screw hole and seating surface section are formed. After that, the force is released and the inner diameter of the base section expands by its own elastic force. Alternatively, with the inner diameter of the base section reduced, the through hole, screw hole and seating surface section are formed, after which the first flange section and second flange section are plastically deformed in the direction away from each other to expand the inner diameter of the base section.
    Type: Application
    Filed: February 1, 2011
    Publication date: January 17, 2013
    Applicant: NSK Ltd.
    Inventors: Seiichi Moriyama, Tatsunori Mita, Taishi Shigeta