Patents by Inventor John Ligos

John Ligos 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).

  • Turbomachine rotor assembly
    Patent number: 11555407
    Abstract: A rotor assembly includes a rotor having a dovetail slot. The dovetail slot includes a plurality of recesses and a first radially innermost surface. A rotor blade includes an airfoil that extends radially outward from a platform and a dovetail that extends radially inward from the platform. The dovetail includes a plurality of projections extending in opposite directions that are received by the plurality of recesses of the dovetail slot. The dovetail further includes a leading edge surface, a trailing edge surface, and a second radially innermost surface. The second radially innermost surface defines a groove from the leading edge surface to the trailing edge surface. The shim is positioned within the groove and between the first radially innermost surface of the dovetail slot and the second radially innermost surface of the dovetail.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: January 17, 2023
    Assignee: General Electric Company
    Inventors: Steven Sebastian Burdgick, John Ligos
  • TURBOMACHINE ROTOR ASSEMBLY
    Publication number: 20210363890
    Abstract: A rotor assembly includes a rotor having a dovetail slot. The dovetail slot includes a plurality of recesses and a first radially innermost surface. A rotor blade includes an airfoil that extends radially outward from a platform and a dovetail that extends radially inward from the platform. The dovetail includes a plurality of projections extending in opposite directions that are received by the plurality of recesses of the dovetail slot. The dovetail further includes a leading edge surface, a trailing edge surface, and a second radially innermost surface. The second radially innermost surface defines a groove from the leading edge surface to the trailing edge surface. The shim is positioned within the groove and between the first radially innermost surface of the dovetail slot and the second radially innermost surface of the dovetail.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 25, 2021
    Inventors: Steven Sebastian Burdgick, John Ligos
  • Margin bucket dovetail radial support feature for axial entry buckets
    Patent number: 10465537
    Abstract: The present application provides a steam turbine. The steam turbine may include a number of rotor wheel slots, a number of buckets positioned in the rotor wheel slots, and a radial support assembly positioned between each of the buckets and each of the rotor wheel slots. The radial support assembly may include one or springs and one or more shims.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: November 5, 2019
    Assignee: General Electric Company
    Inventors: Steven Sebastian Burdgick, John Ligos, Thomas Joseph Farineau
  • Margin Bucket Dovetail Radial Support Feature for Axial Entry Buckets
    Publication number: 20170342845
    Abstract: The present application provides a steam turbine. The steam turbine may include a number of rotor wheel slots, a number of buckets positioned in the rotor wheel slots, and a radial support assembly positioned between each of the buckets and each of the rotor wheel slots. The radial support assembly may include one or springs and one or more shims.
    Type: Application
    Filed: September 30, 2016
    Publication date: November 30, 2017
    Inventors: Steven Sebastian Burdgick, John Ligos, Thomas Joseph Farineau