Hollow golf club head having crown stress reducing feature

摘要

A hollow golf club head incorporating a stress reducing feature including a crown located stress reducing feature. The location and size of the crown stress reducing feature, and their relationship to one another and other club head engineering variables, play a significant role in selectively increasing deflection of the face.

主权项

1. 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; and (vi) a stress reducing feature (1000) including a crown located SRF (1100) located on the crown (600), wherein 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), and a CSRF depth (1150), wherein the maximum CSRF width (1140) is at least ten percent of the Zcg distance and the maximum CSRF depth (1150) is at least ten percent of the Ycg distance, and wherein the face (500) has a characteristic time of at least 220 microseconds, and a head volume is less than 200 cubic centimeters.