Patents by Inventor Toshiyuki Hatori

Toshiyuki Hatori 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: 4958422
    Abstract: A wear-resistant compound roll comprising an outer layer made of an iron-base alloy containing such components as to precipitate at least one of carbides of W, V, Nb, Ti, Ta, Zr and Hf from an alloy melt in a solidification process thereof, and a steel shaft metallurgically bonded to the outer layer, the outer layer having a surface with a Shore hardness of 70 or more, and the shaft having a tensile strength of 55 kg/mm.sup.2 or more and an elongation of 1.0% or more, and a boundary layer between the outer layer and the shaft being not weaker than weaker one of the outer layer and the shaft.The iron-base alloy has a composition by weight % consisting essentially of 1.5-3.5% C, 0.3-3.0% Si, 0.3-1.5% Mn, 2-7% Cr, 9% or less Mo, 20% or less W, 3-15% V and balance substantially Fe.
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: September 25, 1990
    Assignee: 501 Hitachi Metals, Ltd.
    Inventors: Masahiko Oshima, Takumi Ohata, Toshiyuki Hatori