Patents by Inventor Paul T. Unger

Paul T. Unger 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).

  • Partitioned poppet valve mechanism seprating inlet and exhaust tracts
    Patent number: 5020486
    Abstract: A valve mechanism for a reciprocating piston internal combustion engine having one large poppet valve per cylinder communicating with both inlet and exhaust tracts. A partition between the inlet and exhaust tracts has gas flow ports therethrough moving into and out of alignment with similar gas flow ports in the valve stem. The ports are arranged to permit gas flow from the inlet tract to the outlet tract when the valve is closed.
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: June 4, 1991
    Inventor: Paul T. Unger