Patent ID: 6193614
Filing Date: 2001-02-27
Classification: A63B

Abstract:
A golf club head defined by a face portion, an upper face portion, a toe-side portion, a heel-side portion, a sole portion, and a back-face portion, wherein at least one of said portions is partitioned by thick portions or rib portions into a plurality of segments each having a long-dimension direction and a short-dimension direction, and at least one of said segments satisfies at least one of the following conditions:1) a longitudinal direction of crystal grains of a material of said segment is oriented in said short-dimension direction;2) a direction in which said material exhibits a large ductile amount at the time of breaking is oriented in said short-dimension direction; and3) a direction in which said material exhibits a large ratio of ductility per unit length is oriented in said short-dimension direction.