Patent ID: 8187116

Claim:
A golf club head comprising: a wood type golf club head body with a double wall structure, wherein the wood type golf club head body includes: a ball striking face portion which includes a first wall and an outer perimeter portion, a rear portion opposite to the first wall and engaged with the ball striking face portion; a crown portion; a sole portion; a toe end portion; a heel end portion; and a second wall behind the first wall, wherein a cavity between 0.1-6.0 millimeters is defined between the first wall and the second wall, wherein the ball striking face portion is configured to be disengaged from the rear portion of the golf club head body, wherein the ball striking face portion has a cup shape wherein the outer perimeter portion includes a portion which extends rearwardly away from the first wall and engages with a perimeter portion of an open face of the rear portion of the golf club head body, wherein the outer perimeter portion does not include more of a bottom surface of the wood type golf club head body than the rear portion of the golf club head.