Patent ID: 8696268
Filing Date: 2014-04-15
Classification: B23B,Y10T

Abstract:
1. A guide for a hole saw having a pilot member and a cutting member for cutting a second hole in an object having a pre-existing hole, the second hole at least partially overlapping the pre-existing hole, comprising: a guide member having a bore therein, the guide member capable of being positioned in the pre-existing hole and held in the pre-existing hole by at least a first support member attached to the guide member, the bore adapted to slideably receive the pilot member to guide the hole saw to rotate coaxially relative to the bore when cutting the second hole, the first support member having a component of extension perpendicular to the axis of the bore of the guide member; a second support member having a component of extension perpendicular to the axis of the bore of the guide member, removably attachable to the guide member, the first and second support members capable of at least partially bridging the pre-existing hole when the guide member is positioned in the pre-existing hole with the first and second support members attached, the second support member having a plurality of radial arms extending from a hub and wherein the guide member is attached to the second support member proximate the hub, the hub having a first side and a second side, the first side disposed towards one end of the guide member and the second side disposed toward the other end of the guide member when attached thereto, a diameter of the hub being less than a diameter of the pre-existing hole, the radial arms tapering in thickness in a direction parallel to the direction of extension of the hub from the first side to the second side and having a greater thickness proximate the hub and a lesser thickness distal to the hub.