Patents by Inventor Ethan C. Drew

Ethan C. Drew 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).

  • Gas turbine engine airfoil frequency design
    Patent number: 10781827
    Abstract: A turbomachine airfoil element includes an airfoil that has pressure and suction sides spaced apart from one another in a thickness direction and joined to one another at leading and trailing edges. The airfoil extends in a radial direction a span that is in a range of 27.5-28.5 inches (699-724 mm). A chord length extends in a chordwise direction from the leading edge to the trailing edge at 50% span and is in a range of 13.0-14.0 inches (330-356 mm). The airfoil element includes at least two of a first mode with a frequency of 34±10% Hz, a second mode with a frequency of 90±10% Hz, a third mode with a frequency of 178±10% Hz, a fourth mode with a frequency of 222±10% Hz, a fifth mode with a frequency of 307±10% Hz and a sixth mode with a frequency of 389±10% Hz.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: September 22, 2020
    Assignee: Raytheon Technologies Corporation
    Inventors: Jason Elliott, Daniel C. Falk, Myron L. Klein, Ethan C. Drew, James H. Moffitt, Darryl Whitlow, Byron R. Monzon, Jay Thomas Abraham, William R. Graves
  • Fan blade root
    Patent number: 10570755
    Abstract: A dovetail root of a fan blade configured for operation within the fan assembly of a gas turbine engine. The dovetail root is imparted with a compressive residual stress layer along the outer faces of the dovetail root preventing crack formation within the dovetail root when the gas turbine engine is in operation. To further protect and structurally enhance the dovetail root, a wear covering is disposed on the dovetail root. The wear covering may consist of a composite laminate layer that is bonded to the metallic core of the dovetail root providing additional cracking protection of the dovetail root when the gas turbine engine is in operation.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: February 25, 2020
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Scott C. Billings, William R. Graves, Jason Elliott, David P. Houston, Ethan C. Drew
  • Wear pad to prevent cracking of fan blade
    Patent number: 10273816
    Abstract: A fan blade of a gas turbine engine includes an airfoil, a root received in a slot of a hub, and a wear pad covering at least a portion of the root and made of an integrally bonded woven composite laminate.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: April 30, 2019
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Jay T. Abraham, Ethan C. Drew, Scott C. Billings, Michael A. Weisse, James O. Hansen, Venkatarama K. Seetharaman
  • Fan Blade Root
    Publication number: 20160230572
    Abstract: A dovetail root of a fan blade configured for operation within the fan assembly of a gas turbine engine. The dovetail root is imparted with a compressive residual stress layer along the outer faces of the dovetail root preventing crack formation within the dovetail root when the gas turbine engine is in operation. To further protect and structurally enhance the dovetail root, a wear covering is disposed on the dovetail root. The wear covering may consist of a composite laminate layer that is bonded to the metallic core of the dovetail root providing additional cracking protection of the dovetail root when the gas turbine engine is in operation.
    Type: Application
    Filed: February 9, 2015
    Publication date: August 11, 2016
    Inventors: Scott C. Billings, William R. Graves, Jason Elliott, David P. Houston, Ethan C. Drew
  • WEAR PAD TO PREVENT CRACKING OF FAN BLADE
    Publication number: 20150110636
    Abstract: A fan blade of a gas turbine engine includes an airfoil, a root received in a slot of a hub, and a wear pad covering at least a portion of the root and made of an integrally bonded woven composite laminate.
    Type: Application
    Filed: February 3, 2014
    Publication date: April 23, 2015
    Applicant: United Technologies Corporation
    Inventors: Jay T. Abraham, Ethan C. Drew, Scott C. Billings, Michael A. Weisse, James O. Hansen, Venkatarama K. Seetharaman