Patent ID: 8328659

Claim:
A golf club head, the club head comprising: a hollow body having a perimeter region and a face, the hollow body defining an inner cavity, the face having a geometric face center and an area of maximum coefficient of restitution, wherein the hollow body comprises a slot disposed in the perimeter region and forming an opening into the inner cavity of the hollow body, wherein the slot is formed between a portion of a sole of the hollow body and a portion of the perimeter region, wherein one of the portion of the sole and the portion of the perimeter region adjacent the slot extends inward and into the inner cavity relative to the other of the portion of the sole and the portion of the perimeter region, and wherein the area of maximum coefficient of restitution is disposed within a zone on the face and the maximum coefficient of restitution is closer to the geometric face center as compared with a club without a slot, and wherein ball speed after impact is increased when the face is impacted in an area from the geometric face center toward the slot and wherein the slot increases the speed at which a golf ball rebounds from the face of the club head as compared with a club head without a slot.