Patents by Inventor James F. Roomsburg

James F. Roomsburg 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).

  • Liquid secondary cooling system
    Patent number: 6467279
    Abstract: A secondary loop refrigeration system includes plural refrigeration zones serially connected in a secondary cooling loop using a R-134a as a liquid refrigerant in increasing order of operating temperatures, the secondary cooling loop being in heat exchange relationship with a primary cooling loop using direct expansion refrigerants. The primary cooling loop may be selectively isolated allowing the latent heat of the units in the zones to increase the circulating temperature of the secondary refrigerant sufficient to defrost the cooling coils.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: October 22, 2002
    Inventors: Thomas J. Backman, James F. Roomsburg
  • Series secondary cooling and dehumidification system for indoor ice rink facilities
    Patent number: 6321551
    Abstract: An indoor ice rink facility is provided with a dehumidifier coil connected with the ice rink refrigeration coils in a secondary refrigerant loop and a reheat coil coupled with the primary refrigerant loop for maintain the ice sheet and controlling the humidity of the facility in a single system.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: November 27, 2001
    Inventors: Thomas J. Backman, James F. Roomsburg