Patent ID: 8337329

Claim:
A golf club head having a sole, a crown, a toe, and a heel and comprising a face part formed of a metallic material, the face part comprising: an outer peripheral portion; a thick-walled portion having a wall thickness greater than that of the outer peripheral portion, the wall thickness of the thick-walled portion being greatest in a central portion of the face part and decreasing gradually from the central portion toward the outer peripheral portion, wherein the thick-walled portion is configured as a circular or elliptical shape having depressions on two opposite sides thereof, the depressions comprising a first depression on the toe side being directed toward the central portion of the face part and a second depression on the heel side being directed toward the central portion of the face part; and at least two thin-walled portions having a wall thickness less than that of the outer peripheral portion, each of the thin-walled portions being positioned over a region surrounded by one of the two opposite sides of the circular or elliptical shape and one of the depressions, wherein the thick-walled portion is directly adjacent to the outer peripheral portion on the sole and crown sides thereof; wherein the face part further comprises a rib extending from an outer edge on the heel side and on the crown side of the face part to an outer edge on the toe side and the sole side thereof passing through the central portion of the thick-walled portion, and the rib has a wall thickness greater than that of the outer peripheral portion; and wherein a ratio of areas which the outer peripheral portion, the thin-walled portion, the thick-walled portion, and the rib occupy in the total area of the face part is 16-20:2-6:14-18:1-6.