Patent ID: 6418947
Filing Date: 2002-07-16
Classification: B08B,E03F

Abstract:
An apparatus for scarifying an interior surface of a sewer pipe both of round and non-round cross-section, said apparatus having a nozzle for discharging fluid under pressure against the interior surface, comprising:(a) a vehicle moveable along an interior of said pipe in a direction substantially parallel to an axis of said pipe; (b) a principal arm coupled to said vehicle; and (c) a scarifying assembly rotatably coupled to said principal arm having a fluid nozzle assembly with at least one fluid nozzle, said fluid nozzle assembly operative to one of rotate and oscillate, one of said scarifying assembly and said principal arm being extendible to place said fluid nozzle at a location adjacent to the interior surface of said pipe and operative, as said vehicle moves along the interior of said pipe, to remove contaminants and corrosion products from a selected region along the interior surface of said pipe, the selected region being of an area larger than an area that would be scarified by said nozzle if it were not rotating or oscillating, when fluid from said fluid nozzle assembly is directed as a jet against the interior surface of said pipe.