Resurfacing device for screwdrivers and like tools

Abstract

A resurfacing device for screwdrivers and like tools has two sets of rotary grinding members provided with grinding portions arranged along two intersecting planes at right angles to one another. One of the sets of rotary grinding members is mounted to rotate about a first axis to provide a first pair of opposed grinding portions and the other of the sets of rotary grinding members is mounted to rotate about a second axis to provide a second pair of opposed grinding portions. Each rotary grinding member of each set is yieldably urged toward the other of that set to urge each associated pair of opposed grinding portions against surfaces of a tool disposed therebetween. One set of the rotary grinding members is disposed opposite the other set to further provide the two pairs of opposed peripheral grinding portions that are disposed along the other of said intersecting planes. For accommodating a wider range of screwdriver sizes one set of rotary grinding members is movable relative to the other and yieldably urged toward the other to urge grinding portons against a tool. The two sets of rotary grinding members are driven in opposite directions by a motor, preferably a drill-type motor, removably mounted on a support housing for the grinding members. A first guide selectively positions a tool along an axis defined by said intersecting planes or along one of said intersecting planes for engagement by associated grinding portions. A second tool guide selectively positions a tool for grinding by one of the exterior grinding portions of one of the grinding wheels either perpendicular to or at a selected angle relative to the longitudinal axis of the tool. One form of grinding member has file-like ridges on at least one side and the periphery of a generally thin disc-shaped body.

Dependencies are inferred from the claim text.