Patents by Inventor Hiroshi Tokisue

Hiroshi Tokisue 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 for producing insert for diesel engine combustion chamber
    Patent number: 4300381
    Abstract: A method of producing an insert for the combustion chamber of a diesel engine having an oblique injection port comprising inserting a cylindrical work blank into a die, then cold- or hot-compressing such cylindrical work blank between a punch and counter-punch to form a compressed center-recessed shape, forming an oblique recess in at least one side of the bottom of the center recess of said shape at such an end position as to correspond to the injection port to be formed, and then developing a hole in said oblique recess in conformity with the configuration and extent thereof.
    Type: Grant
    Filed: August 15, 1980
    Date of Patent: November 17, 1981
    Assignees: Riken Corporation, M.H. Center Limited
    Inventors: Toshiyasu Sugiuchi, Susumu Aoyama, Hiroshi Tokisue