Golf ball
First Claim
1. A golf ball of improved aerodynamic characteristics having a spherical surface impressed with dimples in the form of a 20-12 hedron, said spherical surface being divided into five-cornered divisions and three-cornered divisions by imaginary circular arcs which are reflectances of edges of the 20-12 hedron on the spherical surface, all twelve of said five-cornered divisions being generally uniformly or completely uniformly provided with said dimples therein, and all twenty of said three-cornered divisions being generally uniformly or completely uniformly provided with said dimples therein, wherein said dimples comprise four sizes having different diameters from each other, with the ratio of the diameter of the largest dimples with respect to the smallest dimples being set to be 1.25-1.50.
1 Assignment
0 Petitions
Accused Products
Abstract
A golf ball provided with two to four different sizes of dimples in the form of a 20-12 hedron and having different diameters from each other which vary in a ratio of 1.25-1.50, with the dimples being equally spaced over the entire surface of the golf ball, such that the flow of the air at every cross section crossing at right angles to the rotational axis of the golf ball is made equal, and at the same time, the angular difference between separation points of the dimples is minimized.
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Citations
8 Claims
- 1. A golf ball of improved aerodynamic characteristics having a spherical surface impressed with dimples in the form of a 20-12 hedron, said spherical surface being divided into five-cornered divisions and three-cornered divisions by imaginary circular arcs which are reflectances of edges of the 20-12 hedron on the spherical surface, all twelve of said five-cornered divisions being generally uniformly or completely uniformly provided with said dimples therein, and all twenty of said three-cornered divisions being generally uniformly or completely uniformly provided with said dimples therein, wherein said dimples comprise four sizes having different diameters from each other, with the ratio of the diameter of the largest dimples with respect to the smallest dimples being set to be 1.25-1.50.
Specification