Patents by Inventor Mark A. Dennis

Mark A. Dennis 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).

  • Inspection of shrunk-on steam turbine disks using advanced ultrasonic techniques
    Patent number: 6736011
    Abstract: A method of ultrasonically testing the disk bore and keyway area of a shrunk-on steam turbine rotor disk or hub is provided. The method employs a one or more scanning ultrasonic phased linear array probes mounted on the disk to inspect the disk bore and keyway area on the opposite side of the disk.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: May 18, 2004
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Paul A. Zayicek, Greg P. Selby, Mark A. Dennis
  • Inspection of shrunk-on steam turbine disks using advanced ultrasonic techniques
    Publication number: 20020088282
    Abstract: A method of ultrasonically testing the disk bore and keyway area of a shrunk-on steam turbine rotor disk or hub is provided. The method employs a one or more scanning ultrasonic phased linear array probes mounted on the disk to inspect the disk bore and keyway area on the opposite side of the disk.
    Type: Application
    Filed: December 4, 2001
    Publication date: July 11, 2002
    Inventors: Paul A. Zayicek, Greg P. Selby, Mark A. Dennis
  • Concealed fixing device
    Patent number: 5613793
    Abstract: A concealed fixing device comprises an insert embedded within a first member, an elongate threaded bar connected to the first member and passing through a second member through a concealed hole to a concealed chamber within the second member. A combined nut and washer assembly applied to the threaded bar tightens the first and second members.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: March 25, 1997
    Inventors: Mark A. Dennis, Martyn A. Cotterill