Patents by Inventor John C. Copes

John C. Copes 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).

  • Slurry pump double mechanical split face seal
    Patent number: 4410188
    Abstract: A double mechanical split seal for easy repair or replacement and with low leakage in hard duty slurry service including two pairs of seal ring assemblies - one stationary and the other rotating - urged together about a shaft by a biasing spring, a drive for the rotating pair, a housing assembly for the seal ring assemblies having fluid pressurizing apparatus so that the tapered seal ring inserts are urged into sealing relation.
    Type: Grant
    Filed: November 17, 1982
    Date of Patent: October 18, 1983
    Inventor: John C. Copes