Patent ID: 7128074
Filing Date: 2006-10-31
Classification: B08B,E03F

Abstract:
1. Method for scarifying an interior surface of a sewer pipe, comprising: (a) providing a vehicle moveable along an interior of said pipe, said vehicle having a fluid nozzle assembly mounted to an oscillating mechanism and coupled to an external source of fluid, said fluid nozzle assembly having at least one branch and a fluid nozzle coupled to a distal end of said one branch, said fluid nozzle positionable proximate the interior surface of said pipe, said fluid nozzle assembly being operative to emit a jet of fluid from said fluid nozzle against the interior surface of said sewer pipe and to scarify the interior surface of said pipe; (b) positioning said fluid nozzle proximate the interior surface of said sewer pipe; (c) emit jets of fluid from said fluid nozzles against the interior surface of said sewer pipe; (d) scarifying a swath of the interior surface of said sewer pipe by sweeping said fluid nozzle about an axis substantially parallel to a longitudinal axis of said sewer pipe from a first side of said sewer pipe to a second side of said sewer pipe; (e) moving said vehicle forward along said longitudinal axis of said sewer pipe a predetermined distance equal to or less than a width of said swath; and (f) scarifying a swath of the interior surface of said sewer pipe by sweeping said fluid nozzle about an axis substantially parallel to said longitudinal axis of said sewer pipe from said second side of said sewer pipe to said first side of said sewer pipe.