Patents by Inventor Eiichi Shirai

Eiichi Shirai 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).

  • Piston of combustion engine
    Patent number: 4517930
    Abstract: A piston is provided for an internal combustion engine, having a crown portion comprising an upper part and a lower or ring-bearing part which two parts are of different metals welded together. The two metals are chosen to have the same coefficient of expansion but the metal of the upper part of the piston crown is less heat-conductive while that of the ring-bearing part is highly heat-conductive. The piston has a cooling chamber formed in it, part of which chamber is adjacent the upper part of the piston crown while another part of the cooling chamber is adjacent the ring-bearing part.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: May 21, 1985
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Hideaki Nakano, Tadahiro Ozu, Eiichi Shirai