Patents by Inventor Takashiga Tokushima

Takashiga Tokushima 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).

  • 4-cycle 12-cylinder engine
    Patent number: 5056472
    Abstract: A four cycle, 12-cylinder engine includes four cylinder groups each having three cylinders located adjacent to each other. The cylinders in each cylinder group have intake strokes which are apart one from another by 240.degree. in terms of angle of rotation of the engine crankshaft. The cylinders in each cylinder group are connected through respective branch intake passages with a common intake passage. Means is provided for separating the common intake passage of one cylinder group from the common intake passage of another cylinder group.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: October 15, 1991
    Assignee: Mazda Motor Corporation
    Inventors: Toshikazu Kurokawa, Hiroshi Sumimoto, Takashiga Tokushima, Tadao Suemori