Patents by Inventor Derek E. Cadden

Derek E. Cadden 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).

  • Mechanical face seals
    Patent number: 5375854
    Abstract: A metal bellows for use in a mechanical seal is rolled from a flat sheet and seam welded along an axial diagonal line. The bellows includes corrugations or convolutions having inner and outer crowns of identical radii. The end corrugation or convolution at each end of the bellows is axially compressed to provide an annular double-thickness bearing and support surface against which an end ring is located in face-to-face connection. A similar bellows of multiple plies is similarly constructed using a plurality of tubular bodies.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: December 27, 1994
    Assignee: Flexibox Limited
    Inventors: Peter D. Carlisle, Derek E. Cadden