Patents by Inventor Donald Wentworth

Donald Wentworth 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).

  • Seals for rotating shafts, especially for stern tube seals for ships
    Patent number: 4008897
    Abstract: A seal for a rotating shaft, especially for the stern tube seal of a ship, ith at least one radial sealing ring bearing in sealing manner against the shaft or a shaft bush, or at least one reserve sealing ring mounted on a support, which can be moved by axial displacement of the support into a working position on the shaft, wherein the support is arranged so as to be axially movable in guides on parts of the housing of the seal and is provided with a chamber for receiving a pressure medium, especially a hydraulic medium, for moving the support to bring the sealing ring (reserve sealing ring) into a working position on the shaft.
    Type: Grant
    Filed: September 23, 1974
    Date of Patent: February 22, 1977
    Assignee: Howaldtswerke-Deutsche Werft Aktiengesellschaft Hamburg und Kiel
    Inventor: Donald Wentworth