Patents by Inventor Todd Duncan

Todd Duncan 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).

  • Free cooling system for low ambient temperatures
    Patent number: 12584661
    Abstract: A free cooling system includes a circulation path including a pump and one or more heaters. The pump is configured to circulate a process fluid when the free cooling system is deactivated, and the one or more heaters are configured to add heat to the process fluid in the circulation path such that the process fluid remains above a freezing temperature of said process fluid.
    Type: Grant
    Filed: December 12, 2023
    Date of Patent: March 24, 2026
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: William B. Fox, Jacob L. Gregg, Robert J. Larrinaga, Todd Duncan, Daryl Keys
  • FREE COOLING SYSTEM FOR LOW AMBIENT TEMPERATURES
    Publication number: 20250189177
    Abstract: A free cooling system includes a circulation path including a pump and one or more heaters. The free cooling system can further include an isolation valve to isolate the circulation path from an active free cooling circulation path. The pump is configured to circulate a process fluid when the free cooling system is deactivated, and the one or more heaters are configured to add heat to the process fluid in the circulation path such that the process fluid remains above a freezing temperature of said process fluid.
    Type: Application
    Filed: December 12, 2023
    Publication date: June 12, 2025
    Inventors: William B. Fox, Jacob L. Gregg, Robert J. Larrinaga, Todd Duncan, Daryl Keys