Patent ID: 7265313

Claim:
A welding electrode having a hollow cap that is attached to a shank and a coolant supply tube extending through the shank to supply coolant to an underside of the cap, comprising: the hollow cap having a cap tip adapted for placement against a work piece to be welded to conduct weld current to the work piece and having a cap underside that is spaced from the shank a cylindrical cap skirt integral with the cap tip and depending from the cap underside of the cap tip and removably attaching the cap to the shank and thereby forming a coolant tight chamber between the cap underside, the cap skirt, and the shank; a coolant supply tube extending through the shank to conduct coolant to the coolant tight chamber and thereby conduct heat away from the cap tip; a bore formed into the underside of the cap tip and having the coolant supply tube projecting into the bore and into spaced apart relation from the bore end wall to thereby supply coolant closer to the work piece than the cap underside and to define a bore side wall that provides added area of heat transfer contact between the coolant and the cap tip to thereby improve the cooling of the cap tip; and, a standoff abutment provided on one of the cap and the supply tube and engaging with the other of the cap and the supply tube to establish the spaced apart relation between the bore end wall and supply tube.