Patents by Inventor William A. Keough

William A. Keough 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).

  • Salt bath quenching apparatus
    Patent number: 4487398
    Abstract: The quench severity of a molten salt bath is drammatically increased by adding substantial amounts of water to the bath while it is being vigorously agitated by two impellors submerged in the bath. One impellor causes an upward flow and the other a downward flow of molten salt which results in a quiescent condition at the surface of the quench zone of the bath.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: December 11, 1984
    Assignee: Atmosphere Furnace Company
    Inventors: Joseph A. Lincoln, William A. Keough
  • Salt bath quenching method and apparatus
    Patent number: 4431464
    Abstract: The quench severity of a molten salt bath is drammatically increased by adding substantial amounts of water to the bath while it is being vigorously agitated by two impellors submerged in the bath. One impellor causes an upward flow and the other a downward flow of molten salt which results in a quiescent condition at the surface of the quench zone of the bath.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: February 14, 1984
    Assignee: Atmosphere Furnace Company
    Inventors: Joseph A. Lincoln, William A. Keough