Patents by Inventor Hiroshi Isumi

Hiroshi Isumi 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).

  • Air intake system for fuel injection type four cycle engine
    Patent number: 5186140
    Abstract: A number of embodiments of these valve intake systems for internal combustion engines served by a siamese type intake passage and configured to generate a swirl in the intake charge. A single fuel injector sprays fuel into a common inlet opening of the siamese intake passage and sprays more fuel toward the swirl side port so as to insure equal flow through all of the ports.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: February 16, 1993
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Hideaki Ueda, Hiroshi Isumi