Patents by Inventor Mikio Nakasima

Mikio Nakasima 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).

  • Intake device of an internal combustion engine
    Patent number: 4491102
    Abstract: An engine comprising an intake port which has a helical portion and a separating wall projecting downwardly from the upper wall of the intake port. The separating wall defines an inlet passage portion tangentially connected to the helical portion, and a bypass passage interconnecting the inlet passage portion to the helical portion. A rotary valve is arranged in the bypass passage and actuated by a vacuum operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of an engine is increased beyond a predetermined value.
    Type: Grant
    Filed: August 10, 1982
    Date of Patent: January 1, 1985
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Mikio Nakasima