Patents by Inventor Paul M. Earl

Paul M. Earl 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).

  • Plastic bore seal
    Patent number: 4930791
    Abstract: A plastic bore seal assembly, for use in a static or dynamic mode, comprising a sleeve-type seal element with an annular sealing lip at each end thereof, an anti-extrusion ring surrounding the seal element intermediate the sealing lips, one or more sleeve-like finger springs within the seal element, and optionally a wear sleeve within the seal element bore.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: June 5, 1990
    Assignee: FMC Corporation
    Inventors: Tep Ungchusri, Paul M. Earl