Patent ID: 7207749
Filing Date: 2007-04-24
Classification: F16L

Abstract:
1. A method for installing underground pipe under a ground supported structure using a ground piercing tool comprising a pointed tip releasably connected to a forward end of a rod having a forward end portion dimensioned to fit within the pipe and having an outwardly enlarged rear end portion, the method comprising the steps of: pre-mounting the pipe on the ground piercing tool by forming first and second trenches in the ground on opposite sides of the structure; placing the ground piercing tool in the first trench with the tip or end portion of the tool facing the second trench; driving the tool through the ground under the structure toward the second trench until the tip extends into the second trench and the tool forms an in-ground tunnel between the first and second trenches; removing the tip from the rod; and pulling the rod rearward into the first trench leaving the pipe in place in the in-ground tunnel.