Patent ID: 6428425
Filing Date: 2002-08-06
Classification: A63B

Abstract:
A metal golf club head having a hollow portion, a heel side, a toe side, a crown side, a sole side, a face portion, and a sweet spot area on a central area of the face portion, wherein, a region on the face portion excluding a central region in immediate vicinity of the sweet spot and extending continuously from a crown portion immediately above the central region via a heel portion on the crown side and a heel portion on the sole side to a sole portion, in immediate vicinity below the central region, defined as a lower rigidity region, has a lowered rigidity, and wherein a region, on the face portion, other than the low rigidity region is defined as a high rigidity region and a material having a lower elasticity modulus than that of a material used for the face portion in the high rigidity region is used for the face portion in said low rigidity region.