Patents by Inventor Stuart Preston

Stuart Preston 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).

  • Shaft seal
    Patent number: 4986553
    Abstract: A shaft seal comprises a rigid case ring 1 and a sealing ring which has a PTFE or like ring component 4 secured in the case ring by a molded elastomeric ring component 5 molded into and face-bonded to the case ring, to secure the PTFE ring component in place, and having elastomeric material 7 extending over the air side face of the PTFE ring component, toward a sealing periphery thereof, and forming the wiping seal. Optionally, the elastomeric material is molded into a hydrodynamic, positive sealing configuration of ribs or grooves 8.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: January 22, 1991
    Assignee: George Angus & Company Limited
    Inventors: Stuart Preston, Robert Holloran, Brian Lidgate