Patents by Inventor Yoshihiko Kanbe

Yoshihiko Kanbe 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: 4646552
    Abstract: A process for manufacturing a universal joint mainly by cold forging which comprisesa blanking step to punch out a blank having a pair of fork member portions projecting from one side thereof and a hub member portion out of a sheet metal or coiled sheet metal material,a press-working step to form bolt holes on the lug member portions and projections on the opposite side thereof by extrusion,a forming step to bend each root portion of each pair of fork member portions to bring them to a fixed height from the hub member portion,a primary bending step to form the hub member portion into a cylindrical shape,a secondary bending step to project the lug member portions in parallel to each other from said cylindrically shaped hub member portion after completion of the primary bending step, anda press-reforming step to straighten the configuration of the formed product after the secondary bending step.
    Type: Grant
    Filed: December 14, 1983
    Date of Patent: March 3, 1987
    Assignee: Aida Engineering, Ltd.
    Inventor: Yoshihiko Kanbe