Patents by Inventor Toshimitsu Ogawa

Toshimitsu Ogawa 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).

  • Patent number: 5078632
    Abstract: To reduce engine exhaust gas pressure behind a motorboat propeller formed with a boss for educing engine exhaust gas therethrough, without forming a trumpet-shaped boss end and without allowing exhaust gas to flow upstream along the boss outer surface, a single or plural small subblades are provided between two adjacent large main blades at such a position that a positive pressure domain produced by the subblade reduces a negative pressure domain produced by the main blade. Since engine exhaust gas can be effectively educed, engine power increases and therefore motorboat acceleration performance can be improved.
    Type: Grant
    Filed: August 17, 1990
    Date of Patent: January 7, 1992
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Toshimitsu Ogawa, Shouichi Takahara, Hideo Tahara
  • Patent number: 4801282
    Abstract: An apparatus for controlling a plurality of driving units comprises a lever device pivotable to operate each driving unit, and a switch device having a plurality of switches each for changing the position of a driving portion of each driving unit. The switch device is disposed in the lever device such that the lever device and thed plurality of switches are simultaneously manually operated.
    Type: Grant
    Filed: February 20, 1987
    Date of Patent: January 31, 1989
    Assignees: Nissan Motor Co., Ltd., Tohatsu Corporation
    Inventors: Toshimitsu Ogawa, Shinichi Kudo