Patent ID: 8323121

Claim:
A golf club head having a hollow space therein, which is made of a metal, comprising: a first member comprising at least a face part; and a second member comprising at least a part of a sole part, at least a part of a crown part, at least a part of a side part, and ribs, wherein each of the ribs extends from the inner surface of the at least a part of the sole part to the inner surface of the at least a part of the crown part via the inner surface of the at least a part of the side part, wherein each of the ribs has a highest height at a position in contact with the inner surface of the at least a part of the crown part, the height of a first rib of the ribs gradually decreasing from the highest height along a direction substantially parallel to a face surface of the head and away from a nearest side part, and wherein the ribs are cast integrally with the at least a part of the sole part, the at least a part of the crown part, and the at least a part of the side part.