Patent ID: 6725518
Filing Date: 2004-04-27
Classification: B23P,F16B,Y10T

Abstract:
A method for repairing a crack in a cast material, including the steps of:forming a stitching pin bore of cylindrical configuration in the material extending between sides of the crack, forming internal threads of uniform diameter on sides of the stitching pin bore, providing a stitching pin having a head at one end, a tip at an opposite end, and with external threads on a cylindrical shaft having constant and uniform cross-section between the tip and the head thereby defining a cylindrical shape, the external threads having a constant major diameter along the shaft length greater than a major diameter of the internal threads of the stitching pin bore to provide an interference fit therebetween as the stitching pin advances into the bore so as to provide sealing therebetween along the pin shaft, and threading the stitching pin into the stitching pin bore to provide the interference fit.