Patents by Inventor Daniel A. GRIFFITHS

Daniel A. GRIFFITHS 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).

  • DEICING FOR ROTOR BLADES WITH ICE DETECTORS
    Publication number: 20260035078
    Abstract: An aircraft includes a rotor blade, ice detectors, and heaters. The rotor blade is configured to be driven to rotate about a hub. The ice detectors are positioned along the rotor blade in zones defined at different locations along the rotor blade. The heaters are disposed along the rotor blade. The heaters are configured to selectively provide heat to any of the zones defined at the different locations along the rotor blade. The controller is configured to activate one or more of the heaters to provide targeted heating to one or more of the zones responsive to feedback obtained from the ice detectors.
    Type: Application
    Filed: August 5, 2024
    Publication date: February 5, 2026
    Applicant: Lockheed Martin Corporation
    Inventors: Daniel A. Griffiths, Philip J. Alldridge, Timothy R. Budd
  • Helicopter tail rotor blades and blade assemblies
    Patent number: 10906638
    Abstract: A tail rotor blade for a helicopter includes a blade body defining a longitudinally extending spar cavity, a leading edge forward of the spar cavity, and a trailing edge aft of the spar cavity. Upper and lower airfoil surfaces extend from the leading edge to the trailing edge on opposite sides of the spar cavity. The upper and lower airfoil surfaces define between one another a constant airfoil segment and transition airfoil segments disposed longitudinally adjacent to the constant airfoil segment on inboard and outboard sides of the constant airfoil segment.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: February 2, 2021
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Krzysztof Kopanski, Daniel A. Griffiths, Joshua A. Breon, Jonathan K. Wong, Benjamin Isabella, Michael Skylar Lawson
  • HELICOPTER TAIL ROTOR BLADES AND BLADE ASSEMBLIES
    Publication number: 20190055012
    Abstract: A tail rotor blade for a helicopter includes a blade body defining a longitudinally extending spar cavity, a leading edge forward of the spar cavity, and a trailing edge aft of the spar cavity. Upper and lower airfoil surfaces extend from the leading edge to the trailing edge on opposite sides of the spar cavity. The upper and lower airfoil surfaces define between one another a constant airfoil segment and transition airfoil segments disposed longitudinally adjacent to the constant airfoil segment on inboard and outboard sides of the constant airfoil segment.
    Type: Application
    Filed: January 25, 2017
    Publication date: February 21, 2019
    Inventors: KRZYSZTOF Kopanski, Daniel A. GRIFFITHS, Joshua A. BREON, Jonathan K. WONG, Benjamin ISABELLA, Michael Skylar LAWSON