Patents by Inventor Masaji Yukawa

Masaji Yukawa 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).

  • Cylinder cooling apparatus of multi-cylinder engine
    Patent number: 5669339
    Abstract: A water passage forming member (10) embedded in a connection wall (4) between adjacent bores (3a) (3a) of a multi-cylinder (2) by a casting process is provided with a pair of left and right vertical jacket communication passages (12)(12) for making cylinder jackets (8)(8) within a cylinder block (1) communicate with a head jacket (22), cooling water passages (15) arranged vertically and in multiple stage for making the paired jacket communication passages (12)(12) communicate with each other, and non-hollow portions (11) arranged in multiple stage and alternately with the cooling water passages (15).
    Type: Grant
    Filed: February 28, 1996
    Date of Patent: September 23, 1997
    Assignee: Kubota Corporation
    Inventors: Masaji Yukawa, Masahiro Aketa, Kazutoshi Okamoto, Yasukazu Kamada, Akira Hayatani, Masahiko Sugimoto, Nobuhiro Yamamoto