Patent ID: 6346053
Filing Date: 2002-02-12
Classification: A63B

Abstract:
A golf ball comprising: a multiplicity of dimples each delimited by an edge, the dimples composed of different types varying in diameter and/or depth and including a majority of large dimples with a diameter of 3.0 to 4.2 mm and a depth of 0.1 to 0.35 mm, said large dimples having an edge angle (&thgr;) of 2Â° to 15Â° which is defined as an angle between a tangent line of a dimple edge and a plane circumscribed by dimple edge as a point on an imaginary spherical surface of the golf ball diameter, and a radius of curvature at the edge of 10 to 50 mm which is defined as the radius r of an imaginary circle inscribed to the dimple edge on the boundary between the dimple and the land, and dimples other than said large dimples having said edge angle (&thgr;) of 2Â° to 15Â° and said radius of curvature at the edge in the range of 10 to 50 mm, and the dimples whose majority consists of the large dimples accounting for at least 65% of the entire surface area and the large dimples accounting for 50% to 100% of the entire dimples of the ball, and said large dimples being densely distributed in proximity to the equator of the ball corresponding to a mold parting line.