Patents by Inventor Joseph E. Forbes

Joseph E. Forbes 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).

  • Lip seal for a rotary shaft
    Patent number: 5503408
    Abstract: A seal assembly is mounted on a shaft in sealing relationship to provide a sealed chamber in a housing from which the shaft extends. The seal assembly includes a unitary annular seal body attached to an annular retainer. The seal body includes three radial sealing lips in engagement with the shaft. A primary lip is adjacent the sealed chamber and provides the primary fluid seal. A secondary lip is rearward of the primary lip and keeps the primary lip aligned with the shaft. A rearward lip excludes environmental contaminants from entering the sealed chamber.
    Type: Grant
    Filed: September 16, 1993
    Date of Patent: April 2, 1996
    Assignee: John Crane Inc.
    Inventors: Curtis B. Hemann, Lucyna Heyduk, Joseph E. Forbes, John Crotser