Golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorKengo Oka
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a golf ball wherein a projection is circularly formed on the bottom of a dimple so as to increase the drag coefficient of the golf ball, whereby the golf ball can be prevented from flying a long distance. Supposing that the largest diameter of said projection is D1, the diameter of said dimple is D2, and L=D1/D2, an equation of 0.1.ltoreq.L.ltoreq.0.9 is determined; supposing that the height of said projection 11 is H1, the virtual greatest depth of said dimple is H2, and K=H1/H2, an equation of 0.6.ltoreq.K.ltoreq.1.0 is determined; and the number of dimples ranges from 250 to 600.
Claims1
A golf ball, which flies a short distance having a projection circularly formed on the bottom of a dimple circularly formed,
- wherein supposing that the largest diameter of said projection is D1, the diameter of said dimple is D2, and L=D1/D2,
- an equation of 0.1.ltoreq.L.ltoreq.0.9 is determined;
- supposing that the height of said projection 11 is H1, the virtual greatest depth of said dimple is H2, and K=H1/H2,
- an equation of 0.6.ltoreq.K.ltoreq.1.0 is determined;
- and
- the number of dimples ranges from 250 to 600.
Dependencies are inferred from the claim text.