Patents by Inventor Ritsuo Kuribara

Ritsuo Kuribara 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).

  • Patent number: 5018899
    Abstract: A yoke for universal joint is composed of a cylindrical coupling tube formed by pressing a metal plate and having a slit in a radial direction and serrate grooves on the internal periphery; a pair of flanges integrally formed at an end of the coupling tube and positioned on both sides of the slit; and a coupling arm formed by pressing a metal plate. One of the flanges has a screw hole, while the other flange has a hole, coaxial with the screw hole, for passing a bolt to be screwed into the screw hole. The coupling arm has a penetrating hole in the base portion, and mutually coaxial circular holes at its opposite ends. The yoke is assembled by fitting the other end of the coupling tube into the penetrating hole in the base portion, and connecting the other end of the coupling tube with the base portion of the coupling arm.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: May 28, 1991
    Assignee: Nippon Seiko Kabushiki Kaisha
    Inventors: Ritsuo Kuribara, Kiyoshi Okubo, Koichi Yokoi, Kiyoshi Sadakata