Patents by Inventor Reizo Yokota

Reizo Yokota 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: 4117877
    Abstract: The disclosure relates to a method of manufacturing a large-sized centrifugally cast composit roll for use in a rolling mill capable of preventing deterioration of a connecting portion of a lower pouring sprue to a mold assembly of shaft portion lower mold while upper and lower metal pouring are simultaneously practisized and also of obtaining uniform thickness of the outer shell.The disclosure also relates to a device for disposing the lower side pouring sprue runner used in the method.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: October 3, 1978
    Assignee: Kabushiki Kaisha Yodogawaseikosho
    Inventor: Reizo Yokota