Patents by Inventor Jean E. Widart

Jean E. Widart 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).

  • Hydraulic expansion tool for tubular element
    Patent number: 4901551
    Abstract: To an elongate body (1) having preferably an adjustable length, seals (2, 3) are fixed. The seals comprise a skirt (22) forming a crown which surrounds a body portion at a small distance from the surface thereof, the skirt being made of a material having a flexibility sufficient to be slightly reduced in diameter when the tool is introduced into a tubular element to be expanded. The skirts of the two seals may be interconnected, thus outwardly delimiting an internal ring-shaped chamber (20) intended to receive an expansion fluid.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: February 20, 1990
    Assignee: Cockerill Mechanical Industries
    Inventor: Jean E. Widart
  • Hydraulic expansion tool for tubular element
    Patent number: 4802273
    Abstract: To an elongate body (1) having preferably an adjustable length, seals (2, 3) are fixed. The seals comprise a skirt (22) forming a crown which surrounds a body portion at a small distance from the surface thereof, the skirt being made of a material having a flexibility sufficient to be slightly reduced in diameter when the tool is introduced into a tubular element to be expanded. The skirts of the two seals may be interconnected, thus outwardly delimiting an internal ring-shaped chamber (20) intended to receive an expansion fluid.
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: February 7, 1989
    Assignee: Cockerill Mechanical Industries
    Inventor: Jean E. Widart