Patents by Inventor G. Christopher D'Alfonso

G. Christopher D'Alfonso 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).

  • Patent number: 5398944
    Abstract: The stuffing box of the present invention includes a seal housing surrounding the polished rod. A V-ring set is mounted in sealing contact with the polished rod, and concentrically surrounds the polished rod within the seal housing. A compression ring is mounted in the seal housing, and includes a first end in contact with the V-ring set, and a second end disposed in proximity with an end face of the seal housing. An annular cylindrical non-metallic bearing having an interior surface in concentric contact with the polished rod is generally concentrically mounted within the compression ring. The bearing is adapted to maintain the V-ring set and the polished rod in concentric alignment. A first annular flange member is mounted on the end face of the seal housing. The first annular flange member surrounds the polished rod, and is mounted in contact with the second end of the compression ring.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: March 21, 1995
    Assignee: A. W. Chesterton Co.
    Inventors: G. Christopher D'Alfonso, Michael P. Grimanis