Patent ID: 8827373

Claim:
A top-down hydro-demolition device for deconstructing a wall at a work-face, wherein said hydro-demolition device comprises: a. a horizontally elongated rigid support frame, wherein said rigid support frame comprises, a top member, wherein said top member is supported from the top of the wall above the work face; b. two rigid rail members attached to and extending downwardly from said top member, said rail members being spaced from one another along said top member, each of said rail members comprising a rail extending vertically along said respective rail member; c. a carriage extending horizontally between, and connected to, said two rail members in a manner that permits said carriage to move up and down along said rails; d. a driver adapted to move said carriage up and down along said rails; and, e. at least one nozzle carried on said carriage, said nozzle being movable in relation to said carriage.