Patents by Inventor John Karpowich

John Karpowich 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).

  • Rotor blade tip planform
    Publication number: 20070212223
    Abstract: A main rotor blade incorporating a rotor blade tip region having a tip chord and a tip taper such that the ratio of the main rotor blade chord to the tip chord is approximately 0.30. The tip taper ratio preferably providing an approximately 28% area of reduction in said outer 10% of said blade span. The tip region preferably further including a hover optimized high lift airfoil and a tip sweep that reaches a constant value of approximately 30 degrees along the quarter chord line.
    Type: Application
    Filed: March 8, 2006
    Publication date: September 13, 2007
    Inventors: Robert Moffitt, Thomas Egolf, Robert Beatty, John Karpowich, Ashish Bagai