Patents by Inventor Larry DeFrances

Larry DeFrances 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).

  • Closed multi-loop water-to-water heat exchanger system and method
    Patent number: 5878581
    Abstract: An apparatus and method of heat exchange in which a liquified gas is evaporated in a first coil disposed in a fluid heat exchange medium in a heat exchanger, absorbing heat by the evaporating liquid to chill the heat exchange medium, disposing in the heat exchange medium in the heat exchanger a second coil containing heat exchange medium in fluid connection with a body of heat exchange medium contained in a reservoir, chilling the heat exchange medium in the heat exchanger and circulating chilled heat exchange medium to the reservoir and from the reservoir to a facility location needing cooling, returning warmed heat exchange medium from the facility location to the reservoir and thence to the second coil for rechilling and reuse.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: March 9, 1999
    Assignee: Advanced Metallurgy Incorporated
    Inventors: Larry DeFrances, Larry J. Gaudino