Patents by Inventor Doug Doup

Doug Doup 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).

  • Internal combustion engine piston
    Patent number: 8276563
    Abstract: An internal combustion engine piston having a combustion bowl with fuel control structure for redirecting at least a portion of the fuel exiting the combustion bowl. One form of the piston includes a sharp edge disposed at the outer surface of the piston adjacent the entrance to the combustion bowl and a rounded fuel receiving lip located within the combustion bowl.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: October 2, 2012
    Assignee: Cummins, Inc.
    Inventors: David P. Quigley, Patrick R. Shea, Aaron S. Quinton, Dana E. Richardson, Doug Doup
  • Internal combustion engine piston
    Publication number: 20040123832
    Abstract: An internal combustion engine piston having a combustion bowl with fuel control structure for redirecting at least a portion of the fuel exiting the combustion bowl. One form of the piston includes a sharp edge disposed at the outer surface of the piston adjacent the entrance to the combustion bowl and a rounded fuel receiving lip located within the combustion bowl.
    Type: Application
    Filed: June 25, 2003
    Publication date: July 1, 2004
    Inventors: David P. Quigley, Patrick R. Shea, Aaron S. Quinton, Dana E. Richardson, Doug Doup