Patents by Inventor T. Andy Craig

T. Andy Craig 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 valve contaminant removal
    Patent number: 8423269
    Abstract: An exhaust gas recirculation system including an exhaust gas passageway which routes a flow of exhaust gas from an exhaust gas source to an intake manifold; an exhaust gas passageway valve which controls flow to the intake manifold; a cooling system coupled with the exhaust gas passageway positioned at a location upstream of the exhaust gas source and downstream of the intake manifold and operable to transfer heat from the flow of exhaust gas to a coolant in flow communication with the cooling system; a bypass passageway coupled with the exhaust gas passageway and bypassing the cooling system; a bypass valve operable to control flow through the bypass passageway; at least one valve operation sensor; and a controller operable to control the bypass valve to direct the flow of exhaust gas to the bypass passageway during exhaust gas recirculation based on a signal from the valve operation sensor.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: April 16, 2013
    Assignee: Cummins Inc.
    Inventors: Jeremy Harden, T. Andy Craig, James M. Eickmeyer, Amit Ashok Surve, Timothy R Evans, Kerk B. McKeon, Scott Henry
  • Exhaust gas recirculation valve contaminant removal
    Publication number: 20110005503
    Abstract: An exhaust gas recirculation system including an exhaust gas passageway which routes a flow of exhaust gas from an exhaust gas source to an intake manifold; an exhaust gas passageway valve which controls flow to the intake manifold; a cooling system coupled with the exhaust gas passageway positioned at a location upstream of the exhaust gas source and downstream of the intake manifold and operable to transfer heat from the flow of exhaust gas to a coolant in flow communication with the cooling system; a bypass passageway coupled with the exhaust gas passageway and bypassing the cooling system; a bypass valve operable to control flow through the bypass passageway; at least one valve operation sensor; and a controller operable to control the bypass valve to direct the flow of exhaust gas to the bypass passageway during exhaust gas recirculation based on a signal from the valve operation sensor.
    Type: Application
    Filed: July 8, 2009
    Publication date: January 13, 2011
    Inventors: Jeremy Harden, T. Andy Craig, James M. Eickmeyer, Amit Ashok Surve, Timothy R. Evans, Kerk B. Mckeon, Scott Henry