Patents by Inventor Kanichi Sumida

Kanichi Sumida 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).

  • Universal joint
    Patent number: 4921470
    Abstract: A universal joint including an intermediate joint member having a spherical portion as assembled and four ridges formed on the outer surface of the spherical portion and defining four guide furrows therebetween, and two shaft each having one end bifurcating into two arms. The two arms of one of the shafts are fitted in two of the guide furrows positioned symmetrically, and the two arms of the other shaft are fitted in the other two guide furrows positioned symmetrically. The entire joint member comprises two divided half segments arranged in combination axially of the member.
    Type: Grant
    Filed: June 19, 1987
    Date of Patent: May 1, 1990
    Assignee: Koyo Seiko Co.
    Inventors: Hiroshi Kotani, Yoshiyuki Inoue, Yasushi Kadota, Hidekazu Sakakibara, Kazuo Ide, Kanichi Sumida