Patents by Inventor Paul D. Leonard

Paul D. Leonard 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).

  • Fuel preheating system for internal combustion engines
    Patent number: 5218944
    Abstract: A fuel preheater for use with internal combustion engines is disclosed. The preheater works on the principle that by preheating the fuel, the fuel is more effectively vaporized, resulting in more efficient combustion. This preheating is accomplished using heat normally wasted via the radiator. The preheater has a housing, through which heated engine coolant on its way from the engine block to the radiator is routed. A coiled steel gas line is routed through the housing, and is connected between the regular fuel line and the engine.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: June 15, 1993
    Inventor: Paul D. Leonard