Patents by Inventor John R. Gunn

John R. Gunn 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).

  • Cast component having corner radius to reduce recrystallization
    Patent number: 10226814
    Abstract: A cast component includes a cast body that has a single crystal microstructure and an internal corner bounding an internal cavity. The single crystal microstructure defines a critical internal residual stress with respect to investment casting of the cast body using a refractory metal core beyond which the single crystal microstructure recrystallizes under a predetermined condition. The internal corner has a corner radius that is greater than a critical corner radius below which an amount of internal residual stress in the single crystal microstructure exceeds the critical internal residual stress. The internal cavity includes a cross section less than about 20 mils near the corner radius.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: March 12, 2019
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Max Asterlin, Jeffrey S. Beattie, John R. Gunn
  • Carbon seal O-ring cavity sizing
    Patent number: 9869391
    Abstract: A carbon seal assembly includes a carbon seal element disposed about a central axis and that extends between a first end and a second end. The carbon seal element includes an inner step surface at an axial distance H1 with regard to the first end. An o-ring is adjacent to the inner step surface. The o-ring includes a cross-section diameter D2 such that a ratio H1/D2 is between 1.60-1.73.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: January 16, 2018
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Paul T. Litis, David J. Avery, Gregory P. Smith, John R. Gunn, David L. Kurtz, IV, Kevin Brut
  • CAST COMPONENT HAVING CORNER RADIUS TO REDUCE RECRYSTALLIZATION
    Publication number: 20160001356
    Abstract: A cast component includes a cast body that has a single crystal microstructure and an internal corner bounding an internal cavity. The single crystal microstructure defines a critical internal residual stress with respect to investment casting of the cast body using a refractory metal core beyond which the single crystal microstructure recrystallizes under a predetermined condition. The internal corner has a corner radius that is greater than a critical corner radius below which an amount of internal residual stress in the single crystal microstructure exceeds the critical internal residual stress. The internal cavity includes a cross section less than about 20 mils near the corner radius.
    Type: Application
    Filed: March 11, 2014
    Publication date: January 7, 2016
    Inventors: Max Asterlin, Jeffrey S. Beattie, John R. Gunn