Patents by Inventor Eugene E. Cunningham

Eugene E. Cunningham 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).

  • Outer diameter pipe plug
    Patent number: 5676174
    Abstract: An outer diameter plug is provided for sealing the open end of a pipe. The plug is capable of being reused on a range of pipe outer diameter tolerances and of providing effective fluid-tight sealing over a range of internal pressures. The plug is particularly suited for use in pressure testing pipes by means of pressure fluids admitted to the pipes through the plug.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: October 14, 1997
    Assignee: EST Group, Inc.
    Inventors: James P. Berneski, Jr., Henry E. Brandenberger, Eugene E. Cunningham
  • Plug assembly
    Patent number: 5437310
    Abstract: A wedge and ring-type plug assembly for plugging a heat exchanger tube to provide a leak resistant seal. The plug assembly is designed to reduce the effect of friction forces so that the tapered elongate wedge can be displaced through the compressible ring with a relatively low amount of force.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: August 1, 1995
    Assignee: Expando Seal Tools, Inc.
    Inventor: Eugene E. Cunningham