Golf ball

Games using tangible projectile – Golf – Ball

Patent

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Details

473384, 473372, A63B 3706, A63B 3712, A63B 3714

Patent

active

058139249

ABSTRACT:
There is provided a golf ball comprising a core and a cover having a plurality of dimples thereon wherein said core has a distortion of 2.8 to 4.0 mm under a load of 100 kg, the ratio of a core distortion under a load of 100 kg divided by a ball distortion under a load of 100 kg ranges from 1.0 to 1.3, said cover has a thickness of 1.4 to 1.9 mm, and a Shore D hardness of 53 to 60, said dimples are divided into at least three kinds of dimples which have different diameters each other, each dimple has the ratio of diameter (mm) divided by depth (mm) of 18 to 27, the value of the spatial volume of each dimple below a plane defined by an edge of the dimple divided by the volume of a cylinder wherein the bottom of said cylinder is defined by said plane and the height is determined by the maximum depth of the dimple from said plane ranges from 0.390 to 0.550, and the total number of said dimples is in the range of 390 to 450.

REFERENCES:
patent: 4681323 (1987-07-01), Alaki et al.
patent: 5743817 (1998-04-01), Yamagishi et al.

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