Patents by Inventor James N. Friedman

James N. Friedman 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-backed gas-fired heating system
    Patent number: 4782815
    Abstract: A liquid-backed gas-fired heating system is disclosed which utilizes an infrared burner module having a helical coil wrapped concentrically thereabout. The helical coil located in the radiant zone and convective zone of the module receives heat from the hot products of combustion and transfers the heat to a circulating fluid, which in turn transfers the heat through a fan coil to the space to be heated.
    Type: Grant
    Filed: February 20, 1987
    Date of Patent: November 8, 1988
    Assignee: Carrier Corporation
    Inventors: James N. Friedman, Chester D. Ripka
  • Induced draft submerged burner
    Patent number: 4570612
    Abstract: A method and apparatus for recovering heat from the combustion gas discharged from a submerged horizontal burner. The burner is at atmospheric pressure while an induction fan reduces the pressure inside the heat exchanger and draws the ignited combustion gas through a submerged combustion chamber and through the liquid to a flue. The liquid flows in counterflow arrangement with the combustion gas which further enhances the heat transfer between the combustion gas and the liquid.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: February 18, 1986
    Assignee: Carrier Corporation
    Inventors: Chester D. Ripka, James N. Friedman, Thomas E. Drago