Patents by Inventor David A. Pierpoint

David A. Pierpoint 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).

  • Combustion engine including fluidically-driven engine valve actuator
    Patent number: 7201121
    Abstract: Engines and methods of controlling an engine may involve one or more fluidically driven actuators associated with engine intake and/or exhaust valves. In some examples, the actuators may be placed in flow communication with high pressure fluid from one source and/or low pressure fluid from another. Timing of valve closing/opening and use of an air supply system may enable engine operation according to a Miller cycle.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: April 10, 2007
    Assignee: Caterpillar Inc
    Inventors: James R. Weber, Scott A. Leman, Gerald N. Coleman, Kevin P. Duffy, Eric C. Fluga, Jonathan P. Kilkenny, David A. Pierpoint
  • Combustion engine including fluidically-driven engine valve actuator
    Publication number: 20050229901
    Abstract: Engines and methods of controlling an engine may involve one or more fluidically driven actuators associated with engine intake and/or exhaust valves. In some examples, the actuators may be placed in flow communication with high pressure fluid from one source and/or low pressure fluid from another. Timing of valve closing/opening and use of an air supply system may enable engine operation according to a Miller cycle.
    Type: Application
    Filed: November 19, 2004
    Publication date: October 20, 2005
    Inventors: James Weber, Scott Leman, Gerald Coleman, Kevin Duffy, Eric Fluga, Jonathan Kilkenny, David Pierpoint