Golf ball

Details Golf ball Golf ball

2006-05-16

2006-05-16

Gorden, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

Reexamination Certificate

active

07044865

ABSTRACT:
Golf ball1has a core2and a cover3. The core2is composed of a center4and a mid layer5. Numerous dimples6are formed on the surface of the cover3. Base polymer of this cover3includes a thermoplastic polyurethane elastomer as a principal component. Shore D hardness of this cover3is 30 or greater and 55 or less. Surface area occupation ratio Y of these dimples6is equal to or greater than 0.80. Total volume V of these dimples6is 300 mm3or greater and 700 mm3or less. Average volume Va that is a value derived through dividing this total volume V by total number of the dimples is equal to or greater than 1.30 mm3. Average curvature R that is a mean value of the curvature r of the cross-sectional shape of these dimples6is equal to or greater than 16 mm. Average occupation ratio y that is a value derived through dividing the surface area occupation ratio Y by total number N of the dimples is equal to or greater than 0.0022.

REFERENCES:
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patent: 6319154 (2001-11-01), Yoshida et al.
patent: 2002/0119838 (2002-08-01), Moriyama et al.
patent: 2003/0050137 (2003-03-01), Moriyama
patent: 2003/0073514 (2003-04-01), Iwami et al.
patent: 2003/0109334 (2003-06-01), Moriyama et al.
patent: 2003/0134696 (2003-07-01), Moriyama et al.

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