Golf ball

Details Golf ball Golf ball

2007-06-12

2009-12-22

Trimiew, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

Reexamination Certificate

active

07635313

ABSTRACT:
Golf ball2has a center5,a mid layer6,a cover4and numerous dimples8.A product Pm of a volume Vm multiplied by a flexural rigidity Fm in the mid layer6and a product Pc of a volume Vc multiplied by a flexural rigidity Fc in the cover meet the following formulae (I) and (II).in-line-formulae description="In-line Formulae" end="lead"?1400<(Pm+Pc)<2000   (I)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?5.0<(Pc/Pm)<7.6   (II)in-line-formulae description="In-line Formulae" end="tail"?Provided that mean diameter of all the dimples8is Da, a ratio (N1/N) of number N1 of adjacent dimple pairs having a pitch of (Da/4) or less to total number N of the dimples8is equal to or greater than 2.70. A ratio (N2/N1) of number N2 of the adjacent dimple pairs having a pitch of (Da/20) or less to the number N1 is equal to or greater than 0.50.

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patent: 2004/0009831 (2004-01-01), Ohama et al.
patent: 2005/0137032 (2005-06-01), Aoyama et al.
patent: 2006/0025245 (2006-02-01), Aoyama et al.
patent: 2000-325499 (2000-11-01), None

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