Patent ID: RE43176

Claim:
A method of for treating a workpiece by applying shockwaves thereto , comprising the steps of : applying an a liquid energy-absorbing overlay to a portion of a surface of the workpiece, said energy-absorbing overlay being composed of a liquid material resistant to dissolution by the transparent water overlay and resistant to drying the liquid energy- absorbing overlay comprising a liquid material resistant to drying, and applying a transparent overlay upon the liquid energy - absorbing overlay, wherein the liquid energy - absorbing overlay is comprised of a liquid material resistant to dissolution by the transparent overlay ; applying a transparent overlay upon said energy-absorbing overlay; and directing a pulse of coherent energy to said the liquid energy-absorbing overlay, said the pulse of coherent energy being absorbed at least in part by said liquid material and causing a portion of said the liquid energy-absorbing overlay to vaporize and thereby generate ; and generating at least one shockwave for transmission to the workpiece.