Patent ID: 6800039
Filing Date: 2004-10-05
Classification: A63B

Abstract:
A striking face of a golf club for striking a golf ball, the striking face having a front face and a rear face, with the front face, having an area of a size to strike the golf ball at differing striking positions, with the rear face having a varied thickness distribution providing a steady driving force to the golf ball wherever the striking position is on the front face, wherein the rear face includes a joint adapted to engage with the golf club, with the joint being annular and having an inner peripheral edge spaced from an outer peripheral edge, wherein the rear face is divided into eight sections with an imaginary transverse line, a perpendicular line and to diagonal lines, wherein the rear face has a joint position where the imaginary transverse line, perpendicular line and two diagonal lines join, wherein the joint position has a maximum thickness, the inner peripheral edge of the joint engaging with the imaginary transverse line and the perpendicular line has a medium thickness and the inner peripheral edge of the joint engaging with the diagonal lines has a minimum thickness, with the joint between the inner and outer peripheral edges having the medium thickness.