Patents by Inventor Shin Kurasawa

Shin Kurasawa 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).

  • Apparatus for steel hardening and process therefor
    Patent number: 5795538
    Abstract: In a method for quenching metal parts, a quenching chamber is provided in which the quenching oil is continuously supplied from below the steel parts and circulated upward through the parts in a laminar flow. The circulation is accomplished by feeding the quenching oil onto the bottom of the quenching chamber of an auxiliary chamber surrounding it.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: August 18, 1998
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Fumitaka Abukawa, Hitoshi Goi, Masahiko Watanabe, Shin Kurasawa, Hirofumi Kamisugi