Patents by Inventor Johnny F. Hill, II

Johnny F. Hill, II 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).

  • Hollow airfoil cavity surface texture enhancement
    Patent number: 5441574
    Abstract: A method and passage system is applicable to hollow structures, such as hollow rib core fan blades, for removing alpha case and contamination, for improving surface texture, and for smoothing diffusion bonded joints to reduce notches and flaws, after fabrication. The passage system allows for venting and full cavity access to permit cleaning of the interior of the hollow structure. The method of cleaning the interior of a hollow structure may comprise applying an etchant to strip the topical layer from the inside of a hollow mechanical structure, such as a hollow core airfoil; or may comprise pumping an abrasive flow through the hollow cavities of the structure.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: August 15, 1995
    Assignee: General Electric Company
    Inventors: Kurt L. Hansen, Johnny F. Hill, II, Arthur L. Ludwig
  • Hollow airfoil cavity surface texture enhancement
    Patent number: 5391256
    Abstract: A method and passage system is applicable to hollow structures, such as hollow rib core fan blades, for removing alpha case and contamination, for improving surface texture, and for smoothing diffusion bonded joints to reduce notches and flaws, after fabrication. The passage system allows for venting and full cavity access to permit cleaning of the interior of the hollow structure. The method of cleaning the interior of a hollow structure may comprise applying an etchant to strip the topical layer from the inside of a hollow mechanical structure, such as a hollow core airfoil; or may comprise pumping an abrasive flow through the hollow cavities of the structure.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: February 21, 1995
    Assignee: General Electric Company
    Inventors: Kurt L. Hansen, Johnny F. Hill, II, Arthur L. Ludwig