Patents by Inventor Naoji Hisada

Naoji Hisada 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).

  • Pitch controlling device of a marine propeller
    Patent number: 4142835
    Abstract: A relative motion between a solid propeller shaft and a sleeve surrounding the propeller shaft is utilized to control a pitch of a marine propeller; the front end of the sleeve being supported by a pair of taper roller bearings and the rear end of the sleeve being connected to the hub of the propeller. A bearing housing supporting the taper roller bearings is formed as a piston of a servomotor and a casing receiving the bearing housing is formed as a cylinder of the servomotor. The casing is formed as a common oil reservoir for feeding lubricating oil to a stern tube bearing and bearings in the hub of the propeller.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: March 6, 1979
    Assignee: Chuetsu Waukesha Kabushiki Kaisha
    Inventor: Naoji Hisada