Patents by Inventor Richard A. Kern

Richard A. Kern 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).

  • Exhaust gas recirculation system for a diesel engine
    Patent number: 4020809
    Abstract: An exhaust gas recirculation system is provided for reducing the content of oxides of nitrogen in the exhaust of a diesel engine. The system is effective in recirculating variable amounts of exhaust gas back through the engine in relation to engine load by being operatively controlled in response to predetermined settings of the engine's fuel supply system.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: May 3, 1977
    Assignee: Caterpillar Tractor Co.
    Inventors: Richard A. Kern, Carl L. McClung, James R. Turner