Patents Assigned to Kabushiki Kaisha Topura
  • Tightening structure using high-strength self-forming screws
    Patent number: 7938609
    Abstract: The present invention provides a tightening structure with which a reduction in processing steps is achieved without modifying the shape of a partner member an improvements in bolt strength and fatigue strength are achieved, and with which the fitting length of a thread ridge is not altered greatly in comparison with a conventional tightening structure such that a size reduction can be achieved, thereby contributing greatly to a reduction in the weight of a vehicle.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: May 10, 2011
    Assignee: Kabushiki Kaisha Topura
    Inventors: Shigeto Mori, Akihide Umada, Mayumi Matsuno