Patent ID: 8591351

Claim:
A hollow golf club head ( 400 ) comprising: (i) a face ( 500 ) positioned at a front portion ( 402 ) of the golf club head ( 400 ) where the golf club head ( 400 ) impacts a golf ball, opposite a rear portion ( 404 ) of the golf club head ( 400 ), wherein the face ( 400 ) includes an engineered impact point (EIP), a top edge height (TEH), and a lower edge height (LEH); (ii) a sole ( 700 ) positioned at a bottom portion of the golf club head ( 400 ); (iii) a crown ( 600 ) positioned at a top portion of the golf club head ( 400 ); (iv) a bore having a center that defines a shaft axis (SA) which intersects with a horizontal ground plane (GP) to define an origin point, wherein the bore is located at a heel side ( 406 ) of the golf club head ( 400 ), and wherein a toe side ( 408 ) of the golf club head ( 400 ) is located opposite of the heel side ( 406 ); (v) a center of gravity (CG) located: (a) vertically toward the crown ( 600 ) of the golf club head ( 400 ) from the origin point a distance Ycg; (b) horizontally from the origin point toward the toe side ( 408 ) of the golf club head ( 400 ) a distance Xcg that is generally parallel to the face ( 500 ) and the ground plane (GP); and (c) a distance Zcg from the origin toward the rear portion ( 404 ) in a direction generally orthogonal to the vertical direction used to measure Ycg and generally orthogonal to the horizontal direction used to measure Xcg; (vi) a stress reducing feature ( 1000 ) including a crown located SRF ( 1100 ) located on the crown ( 600 ), wherein: (a) the crown located SRF ( 1100 ) has a CSRF length ( 1110 ) between a CSRF toe-most point ( 1112 ) and a CSRF heel-most point ( 1116 ), a CSRF leading edge ( 1120 ) having a CSRF leading edge offset ( 1122 ), a CSRF width ( 1140 ) that is at least forty percent of the Zcg distance, and a CSRF depth ( 1150 ); (b) the minimum CSRF leading edge offset ( 1122 ) is less than the difference between the maximum top edge height (TEH) and the minimum lower edge height (LEH); and (c) the CSRF depth ( 1150 ) is at least ten percent of the Ycg distance.