Patents by Inventor Shizuo Mitsuhashi

Shizuo Mitsuhashi 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).

  • Method and apparatus for correcting the hardening deformation of annular elements
    Patent number: 5660650
    Abstract: In a method and an apparatus for correcting a hardening deformation of an annular element made out of steel, during the cooling stage of hardening, the annular element which still has an austenitic structure is subjected to working on either the outside or inside diameter, with the degree of working being 0.05-1.0% if it is on the outside diameter with the annular element being pressed into a mold, and 0.5-3.0% if the working is on the inside diameter. Thus the deformation that develops in annular steel elements due to heat treatments is effectively corrected to yield completely round, strain-free or deformation-free annular elements.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: August 26, 1997
    Assignee: NSK Ltd.
    Inventors: Shigeru Okita, Shizuo Mitsuhashi, Kazuo Hayakawa, Akihiro Kiuchi