Patent ID: 7252602

Claim:
A golf ball having numerous double radius dimples and numerous triple radius dimples on the surface thereof, said double radius dimple comprising a first side wall face having a curvature radius R 1 , and a bottom face having a curvature radius R 2 that is 5 times or more and 55 times or less greater than the curvature radius R 1 and being positioned on the bottom side than the first side wall face, said triple radius dimple comprising: a first side wall face having a curvature radius R 1 that is equal to or greater than the phantom curvature radius Rx of the phantom dimple corresponding to a single radius dimple having an equal diameter and an equal volume to each one of said triple radius dimple; a second side wall face being positioned on the bottom side than said first side wall face and having a curvature radius R 2 that is smaller than the phantom curvature radius Rx; and a bottom face being positioned on the bottom side than said second side wall face and having a curvature radius R 3 that is equal to or greater than the phantom curvature radius Rx, a proportion of the number of the double radius dimples in total number of the dimples being 20% or greater and 42% or less, and a proportion of the number of the triple radius dimples in total number of the dimples being equal to or greater than 50%.