Patents by Inventor John H. Newell

John H. Newell 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).

  • Valve for furnace stack pipe
    Patent number: 4543941
    Abstract: A valve is provided for installation in the auxillary duct of a furnace stack pipe. The valve prevents flow of air through the damper plate in the auxillary duct when the furnace is switched off. The valve is controlled by a temperature responsive bimetallic strip which is impinged upon by flue gases to move the valve to an open position upon the furnace being ignited and producing combustion gases.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: October 1, 1985
    Inventor: John H. Newell
  • Valve for furnace stack pipe
    Patent number: 4470401
    Abstract: A valve for provided for installation in the auxillary duct of a furnace stack pipe. The valve prevents flow of air through the damper plate in the auxillary duct when the furnace is switched off. The valve is controlled by a temperature responsive bimetallic strip which is impinged upon by flue gases to move the valve to an open position upon the furnace being ignited and producing combustion gases.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: September 11, 1984
    Inventor: John H. Newell