Patents Assigned to Tomy Kogyo Kabushiki Kaisha
  • Patent number: 4561275
    Abstract: A method shaping and machining a disc wheel and an equipment therefor wherein, in a disc wheel formed by welding together a rim and a disc, upper and lower mandrels are inscribed with rim bead seat portions formed on both sides of the rim, while upper and lower spinning rolls are pressed against the outer peripheries of the rim bead seat portions for spinning of the latter, and a hub hole formed in the disc is machined with a cutter which is concentric with the upper and lower mandrels, thereby effecting a high accuracy in shaping and machining a disc wheel.
    Type: Grant
    Filed: May 24, 1983
    Date of Patent: December 31, 1985
    Assignee: Tomy Kogyo Kabushiki Kaisha
    Inventors: Susumu Itou, Kishirou Abe, Morishi Kunou