Patents by Inventor W. Steven Johnson

W. Steven Johnson 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).

  • Method of extending life of rotating parts
    Patent number: 8959767
    Abstract: A method of refurbishing a gas turbine engine rotor is disclosed and includes an initial step of inspecting a rotor for defects such as cracks. A strain is then generated around any detected cracks in the rotor to create enhanced plasticized zones about the detected defects that delay defect propagation. Strain is generated by rotating the rotor at speeds greater than operational speeds to induce the desired strain and delay the propagation of defects.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: February 24, 2015
    Assignee: United Technologies Corporation
    Inventors: Alexander Staroselsky, Edward F. Pietraszkiewicz, Dominic J. Mongillo, Jr., Vincent Barker, Benjamin Adair, W. Steven Johnson
  • METHOD OF EXTENDING LIFE OF ROTATING PARTS
    Publication number: 20140137407
    Abstract: A method of refurbishing a gas turbine engine rotor is disclosed and includes an initial step of inspecting a rotor for defects such as cracks. A strain is then generated around any detected cracks in the rotor to create enhanced plasticized zones about the detected defects that delay defect propagation. Strain is generated by rotating the rotor at speeds greater than operational speeds to induce the desired strain and delay the propagation of defects.
    Type: Application
    Filed: November 21, 2012
    Publication date: May 22, 2014
    Applicants: GEORGIA INSTITUTE OF TECHNOLOGY, UNITED TECHNOLOGIES CORPORATION
    Inventors: Alexander Staroselsky, Edward F. Pietraszkiewicz, Dominic J. Mongillo, JR., Vincent Barker, Benjamin Adair, W. Steven Johnson