DRILL HOLE REPOSITIONING TOOL

摘要

A drill hole repositioning tool has a handle or a head for holding the tool, and an elongate drill bit guide having a crescent-like cross-section. The elongate drill bit guide is inserted in an existing drill hole with the convex side of the elongate drill bit guide butting on a side of the existing drill hole. The concave side of the drill bit guide guides a drill bit for drilling a new drill hole. The new drill hole is displaced from the existing drill hole by the thickness of the elongate drill bit guide. A set of drill hole repositioning tools may have a range of thicknesses of the drill bit guides to cater for a range of drill hole repositioning displacements, a range of diameters to cater for a range of standardized drill bit sizes, and a range of insertion lengths to cater for a range of drill hole depths.

主权项

1. A drill hole repositioning tool for facilitating a repositioning of an existing drill hole in a workpiece, the drill hole repositioning tool comprising:
a handle member for holding the tool; and an elongate drill bit guide secured to the handle member; the elongate drill bit guide having a shape which is substantially the shape of a sector of a cylindrical wall, the elongate drill bit guide thus having a convex side and a concave side, the convex side and the concave side each having an identical predetermined diameter D so that the cross-section of the elongate drill bit guide has a crescent-like shape, the elongate drill bit guide having a predetermined thickness T at the center of the crescent-like shape; the elongate drill bit guide having a predetermined insertion length L for inserting in the existing drill hole wherein the convex side of the elongate drill bit guide butts on one side of the existing drill hole; the concave side of the elongate drill bit guide for guiding a drill bit, the drill bit for drilling a new drill hole in the workpiece so that the new drill hole is displaced from the existing drill hole by the predetermined thickness T;whereby the cross-section of the overall resulting hole in the workpiece has a figure-eight-like shape wherein the existing drill hole has been repositioned to the new drill hole from one part of the figure-eight-like shape to the other part of the figure-eight-like shape.