Patents by Inventor Yasuo Tsuchihashi

Yasuo Tsuchihashi 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).

  • Sealing device for shaft
    Patent number: 4168070
    Abstract: The sealing oil in a sealing device for an underwater propeller shaft as maintained at the optimum operating pressure by providing a pressure increasing device in which an oil chamber communicating with the sealing oil and a sea water chamber communicating with the sea water in the vicinity of the propeller shaft are separated by a movable member, e.g., a bellows.
    Type: Grant
    Filed: June 15, 1978
    Date of Patent: September 18, 1979
    Assignee: Niigata Engineering Co., Ltd.
    Inventors: Yasuo Tsuchihashi, Tuneo Yamaguchi