Patents by Inventor David F. Lahram

David F. Lahram 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).

  • Laser search peening for exfoliation corrosion detection
    Patent number: 6528763
    Abstract: An exfoliation corrosion detection method which enables rapid detection and evaluation of hidden exfoliation corrosion on aircraft with related cost savings. Pressure exerted on the surface by the laser created plasma generates a pressure pulse or shock wave that propagates into the part. When the stress in the shock wave is above the dynamic elastic limit of the material, the surface material yields plastically. This plastic strain creates compressive residual stresses in the surface, thereby enabling detection of exfoliation corrosion, if present.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: March 4, 2003
    Assignee: LSP Technologies, Inc.
    Inventors: David F. Lahram, Allan H. Clauer, Jeff L. Dulaney