Patents by Inventor Nier WU

Nier WU 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).

  • Controlled casting of in-mold large steel ingot with induced variable power and variable frequency applied to the top surface of molten metal in-mold
    Patent number: 11925979
    Abstract: Large steel ingot casting is accomplished with a top suspended induction heating device supplied with variable power and variable frequency from a power source. By the induction heating and stirring provided by the top suspended induction heating device, metal solidification advances progressively upwards from bottom to top, and the upper molten metal in a riser part compensates for shrinkage of the lower solidified metal in the main part. Inclusions are selectively moved out of the molten metal by a variable electromagnetic stirring force and the formation of casting defects is suppressed.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: March 12, 2024
    Assignee: Inductotherm Corp.
    Inventors: Satyen N. Prabhu, Mike Maochang Cao, Nier Wu
  • CONTROLLED CASTING OF IN-MOLD LARGE STEEL INGOT WITH INDUCED VARIABLE POWER AND VARIABLE FREQUENCY APPLIED TO THE TOP SURFACE OF MOLTEN METAL IN-MOLD
    Publication number: 20220161318
    Abstract: Large steel ingot casting is accomplished with a top suspended induction heating device supplied with variable power and variable frequency from a power source. By the induction heating and stirring provided by the top suspended induction heating device, metal solidification advances progressively upwards from bottom to top, and the upper molten metal in a riser part compensates for shrinkage of the lower solidified metal in the main part. Inclusions are selectively moved out of the molten metal by a variable electromagnetic stirring force and the formation of casting defects is suppressed.
    Type: Application
    Filed: November 19, 2021
    Publication date: May 26, 2022
    Inventors: Satyen N. PRABHU, Mike Maochang CAO, Nier WU