Patent ID: 8342069
Filing Date: 2013-01-01
Classification: B25D,E04G,G01V

Abstract:
1. An apparatus, comprising: means for impacting a first surface of a concrete structure and producing spalling at a second surface of the structure by a localized shock wave, wherein said impacting means includes a blunt impactor face configured to transmit said localized shock wave through the structure, said blunt impactor face having an axially-outwardly curved surface for transmitting said shock wave into said structure, and wherein said curved surface of said blunt impactor face is arranged to face said first surface of said concrete structure during transmission of said localized shock wave into said structure; means for accelerating the means for impacting to induce spalling at the second surface, wherein the means for accelerating is self-contained, and wherein said accelerating means includes a powder actuated cartridge; a trigger for actuating said powder actuated cartridge while said apparatus is held in a stationary position; and an interlock element projecting forwardly of the impactor face to prevent the impactor face from being in direct contact with the first surface when the means for accelerating the means for impacting is primed for firing.