Patents by Inventor Dennis E. Lessard

Dennis E. Lessard 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).

  • Wheel dovetail scanner
    Patent number: 5623107
    Abstract: An inspection device having electric motor driven magnetic wheels for magnetic attachment of the device to the cylindrical surface between the wheels of a turbine rotor. The inspection device includes a mast that supports an ultrasonic transducer and a rotary encoder.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: April 22, 1997
    Assignee: General Electric Co.
    Inventors: Robert W. Patterson, Sr., Dennis E. Lessard
  • Ultrasonic detection of extended flaws
    Patent number: 4441369
    Abstract: An extended flaw in a material is located in two or three dimensions by propagating ultrasonic energy in a predetermined direction in the material and logging receiving transducer positions and ranges at which individual facets on the surface of the flaw produce maximum amplitude ultrasonic returns. The positions of all of the individual facets in the material are calculated from the predetermined direction, receiving transducer positions and the corresponding ranges. The locations of the individual facets outline the extended flaw.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: April 10, 1984
    Assignee: General Electric Company
    Inventors: Dennis E. Lessard, Paul F. Sabourin