Patents by Inventor Hoan Duy Le

Hoan Duy Le 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).

  • Magnet wire having differential build insulation
    Patent number: 6492892
    Abstract: A magnet wire having differential build insulation for use in transformer coils is disclosed. The wire has a rectangular conductor with an insulation that is thicker on the top and bottom surfaces of the wire than it is on the sides. With the thicker coating on the top and bottom, the wire can be used in layer wound distribution transformer coils, both high voltage wire wound coils and low voltage wound coils, without needing additional insulation between the layers of the winding.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: December 10, 2002
    Assignee: ABB Inc.
    Inventors: Thomas W. Brennan, Norris L. Hill, Hoan Duy Le, Thomas L. Linsenbardt
  • Method for producing an insulated metallic strip
    Patent number: 5980995
    Abstract: An insulated metallic strip suitable for use in the coils of power transformers and method of producing the same. Following the extrusion of a flat metallic strip of conductive material for winding into a magnet coil, the flat strip having a predetermined thickness and first and second sides bounded by a pair of fully rounded edges, the method of insulating the strip of conductive material by supporting the flat strip in a level state at a predetermined temperature in a vacuum chamber and while in the vacuum chamber applying a liquid coating of resin to the entire first side of the strip and the pair of rounded edges and extending onto the second side of the strip from each of the edges a distance at least as great as about 0.25" to prevent turn to turn discharge.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: November 9, 1999
    Assignee: ABB Power T&D Company Inc.
    Inventors: Thomas L. Linsenbardt, Norris L. Hill, Hoan Duy Le
  • Insulated metallic strip and method for producing same
    Patent number: 5904953
    Abstract: An insulated metallic strip suitable for use in the coils of power transformers and method of producing the same. Following the extrusion of a flat metallic strip of conductive material for winding into a magnet coil, the flat strip having a predetermined thickness and first and second sides bounded by a pair of fully rounded edges, the method of insulating the strip of conductive material by supporting the flat strip in a level state at a predetermined temperature in a vacuum chamber and while in the vacuum chamber applying a liquid coating of resin to the entire first side of the strip and the pair of rounded edges and extending onto the second side of the strip from each of the edges a distance at least as great as about 0.25" to prevent turn to turn discharge.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: May 18, 1999
    Assignee: ABB Power T&D Company Inc
    Inventors: Thomas L. Linsenbardt, Norris L. Hill, Hoan Duy Le