Patent ID: 8167737
Filing Date: 2012-05-01
Classification: A63B

Abstract:
1. A hollow wood-type golf club head having a face for hitting a golf ball, wherein: the moment of inertia Ix about a vertical axis passing through the club head's center of gravity is 4,000 to 5,900 g·cm the moment of inertia Iy about a horizontal axis extending through the club head's center of gravity is 3,000 to 5,900 g·cm the radius of curvature Rx of the face bulge is from 18 to 25 inches, the Ry/Rx ratio of the radius of curvature Ry of the face roll to said radius of curvature Rx of the face bulge is 0.50 to 0.90, and the Ry/Iy ratio of the face roll radius Ry to the moment of inertia Iy about the horizontal axis extending through the club head's center of gravity in the toe-heel direction is from 0.0040 to 0.0080 inch/g·cm