Patent ID: 6846226

Claim:
Apparatus for removing a burr from a corner along an inner wall of a workpiece, the apparatus comprising: a flexible shaft that can be rotated about a shaft axis, having a shaft first end, at a selected angular velocity, an abrasive mechanism having a convex proximal surface, connected to a location near a first end of the shaft and including an abrasive material that can abrade the corner of the workplece that is contacted by the abrasive mechanism; a collar of a selected material that will not substantially abrade the workpiece when the workpiece is contacted by the collar, the collar being fixedly attached to the abrasive mechanism; and whereby, when the abrasive mechanism, the collar and at least a portion of the shaft are inserted into an aperture in the workpiece and the shaft is rotated, at least one burr on the corner along the inner wall of the workpiece can be removed as the convex proximal surface rides along the corner during advancement of the apparatus through the aperture.