Patents Assigned to Expando Seal Tools, Inc.
  • 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
  • Tube stabilizer assembly
    Patent number: 5167064
    Abstract: A tube stabilizer assembly and method for bridging a broken tube in a heat exchanger includes an elongate solid rod, on a collar on a flexible cable, which inserts with minimum clearance into the tube from one end and is anchored by a deformable plug assembly fixed to the rod or cable by a commercially-available plugging tool. The assembly has an outside dimension of sufficient clearance for sliding contact in the tube while immobilizing the loose ends of the tube against vibration.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: December 1, 1992
    Assignee: Expando Seal Tools, Inc.
    Inventor: Frederick W. Sutor, IV