Patents by Inventor Heedok Lee

Heedok Lee 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).

  • Arc welding wire of high feeding performance and wire drawing method
    Patent number: 6791064
    Abstract: Disclosed is a wire for arc welding of high feedability having a hardness deviation of less than 18 between a central portion and a surface of a cross section of the wire, and a hardness deviation of less than 15 between each interval of 200 mm in a longitudinal direction when measured by an Hv1 hardness tester. The hardness deviation of the wire is adjustable through control of the area, in which the wire is in contact with dies. The present invention is characterized by adjusting the hardness deviation of the wire by adjusting the contact area ratio defined by the following formula.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: September 14, 2004
    Assignee: Kiswel Ltd.
    Inventors: Heedok Lee, Jachyoung Lee
  • Arc welding wire of high feeding performance and wire drawing method
    Publication number: 20020014477
    Abstract: Disclosed is a wire for arc welding of high feedability having a hardness deviation of less than 18 between a central portion and a surface of a cross section of the wire, and a hardness deviation of less than 15 between each interval of 200 mm in a longitudinal direction when measured by an Hv1 hardness tester. The hardness deviation of the wire is adjustable through control of the area, in which the wire is in contact with dies. The present invention is characterized by adjusting the hardness deviation of the wire by adjusting the contact area ratio defined by the following formula.
    Type: Application
    Filed: June 26, 2001
    Publication date: February 7, 2002
    Inventors: Heedok Lee, Jachyoung Lee