Golf ball

Details Golf ball Golf ball

2007-09-18

2007-09-18

Trimiew, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

C473S383000

Reexamination Certificate

active

11174465

ABSTRACT:
Golf ball2has a core4, a mid layer6, a reinforcing layer8and a cover10. Base polymer of the mid layer6includes an ionomer resin as a principal component. The mid layer6has a hardness Hm as measured with a Shore D type hardness scale of equal to or greater than 55. Base polymer of the reinforcing layer8is a thermosetting resin. Base polymer of the cover10includes a thermoplastic polyurethane elastomer as a principal component. The cover10has a nominal thickness Tc of equal to or less than 0.6 mm. The cover10has a hardness Hc as measured with a Shore D type hardness scale of equal to or less than 54. Ratio (Tr/Tc) of the thickness Tr of the reinforcing layer to the nominal thickness Tc of the cover is 0.005 or greater and 3.0 or less. This golf ball2includes dimples12having a depth Dp. Thickness Td of the cover10immediately below the deepest site of one or more of the dimples12is greater than (Tc−Dp).

REFERENCES:
patent: 6106415 (2000-08-01), Masutani et al.
patent: 6652392 (2003-11-01), Higuchi et al.
patent: 2002/0155902 (2002-10-01), Hayashi et al.
patent: 2003/0120020 (2003-06-01), Yokota et al.

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