Patents by Inventor Takao Sasajima

Takao Sasajima 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).

  • Double reverse revolution propeller apparatus
    Patent number: 4828518
    Abstract: A double reverse revolution propeller apparatus includes front and rear propeller wherein the rear propeller is rotated at higher speeds than the front propeller. When seizure occurs, an inner shaft is disconnected from an engine at an inner shaft connection unit and is connected to an outer shaft at an inner and outer shaft connection unit to be driven in the same direction as the outer shaft. The ratio of absorption horsepower of the front propeller to the rear propeller can to be substantially equal to the ratio of rotational speed of the front propeller to that of the rear propeller. One or both of the front and rear propeller can include a variable pitch propeller. The front propeller can have more blades than the rear propeller.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: May 9, 1989
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Masatoshi Kouda, Hiroshi Takeshita, Katsumi Yonekura, Noboru Tohge, Hiroyuki Hashimoto, Shoji Fukushima, Sadao Asanabe, Kunio Saki, Susumu Matsumoto, Takao Sasajima