Golf ball

Details Golf ball Golf ball

2006-06-27

2006-06-27

Gorden, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

Reexamination Certificate

active

07066841

ABSTRACT:
A golf ball containing a core and a cover, the core being composed of a center and a mid layer. Numerous dimples are formed on the surface of the cover. The cover includes a thermoplastic polyurethane elastomer as a principal component. The Shore D hardness of the cover is 30 or greater and 55 or less. The surface area occupation ratio Y of the dimples is equal to or greater than 75%. A ratio R1of the diameter dmaxof the maximum dimple to the diameter D of the golf ball is 11.0% or greater and 18.0% or less. A ratio R2of the number of dimples having the diameter d accounting for 11.0% or greater and 18.0% or less of the diameter D of the golf ball to the total number N of the dimples is equal to or greater than 20%.

REFERENCES:
patent: 4813677 (1989-03-01), Oka et al.
patent: 5080367 (1992-01-01), Lynch et al.
patent: 5292132 (1994-03-01), Oka
patent: 6241627 (2001-06-01), Kasashima et al.
patent: 2003/0050138 (2003-03-01), Kasashima
patent: 2003/0060307 (2003-03-01), Umezawa et al.
patent: 2003/0190979 (2003-10-01), Sajima

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