Golf ball

Details Golf ball Golf ball

2005-06-28

2005-06-28

Gorden, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

Reexamination Certificate

active

06910975

ABSTRACT:
A base polymer of a cover3of a golf ball1includes a thermoplastic polyurethane elastomer as a principal component. Dimples6are formed on the surface of the cover3.A proportion R1of number of dimples6having a ratio (B/T), which is a ratio of a height B of a bottom of the dimple6to a nominal thickness T of the cover3,of equal to or less than 0.70 occupied in total number of the dimples is equal to or greater than 10%. A proportion R2of number of dimples6having the ratio (B/T) of less than 0.30 occupied in total number of the dimples is equal to or less than 10%. A mean value of the ratio (B/T) for all the dimples6is equal to or less than 0.86. The golf ball1includes a mid layer5having Shore D hardness of equal to or greater than 55. Difference (Hm−Hc) between Shore D hardness Hm of the mid layer5and Shore D hardness Hc of the cover3is equal to or greater than 5.

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