Patent ID: 7066188

Claim:
An apparatus for scarifying an interior surface of a sewer pipe, comprising: (a) a support assembly moveable along an interior of said sewer pipe supported from a bottom half thereof; (b) a rail assembly supported on its ends by said support assembly juxtaposed to the interior surface of said sewer pipe, said rail assembly matching a circumferential trajectory of said sewer pipe; (c) at least one scarifying head coupled to and moveable in either direction along said rail assembly, said scarifying head comprising; (i) a nozzle assembly coupled to said scarifying head having at least one nozzle, operative to rotate or oscillate and emit a jet of fluid against the interior surface of said sewer pipe and to scarify the interior surface of said sewer pipe; and (ii) a driving assembly coupled to said scarifying head, operative to drive said scarifying head along said rail assembly over a pre-selected trajectory.