Patents by Inventor David A. Lednicer

David A. Lednicer 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).

  • Helicopter blade airfoil
    Patent number: 4744728
    Abstract: A family of airfoil cross sections, termed SC21xx, for use in a helicopter blade is disclosed. The airfoil (36) achieves maximum lift performance equivalent to prior art airfoil configurations without incurring increased aerodynamic drag at high velocities. The airfoil (36) was developed by thickening and drooping the leading edge region (38) of the prior art airfoil (30) improving lift in the leading edge region (38) and delaying the formation of sonic shock waves at high velocities.
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: May 17, 1988
    Assignee: United Technologies Corporation
    Inventors: David A. Lednicer, Stephen J. Owen
  • Helicopter blade airfoil
    Patent number: RE33589
    Abstract: A family of airfoil cross sections, termed SC21xx, for use in a helicopter blade is disclosed. The airfoil (36) achieves maximum lift performance equivalent to prior art airfoil configurations without incurring increased aerodynamic drag at high velocities. The airfoil (36) was developed by thickening and drooping the leading edge region (38) of the prior art airfoil (30) improving lift in the leading edge region (38) and delaying the formation of sonic shock waves at high velocities.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: May 14, 1991
    Assignee: United Technologies Corporation
    Inventors: David A. Lednicer, Stephen J. Owen