Solid golf ball

Details Solid golf ball Solid golf ball

2008-04-15

2008-04-15

Trimiew, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

C473S378000

Reexamination Certificate

active

11802833

ABSTRACT:
A solid golf ball is composed of a solid core and a cover of one or more layers which encloses the core and has on a surface thereof numerous dimples. The solid core has a diameter of 38.7 to 39.6 mm and a deflection hardness of 3.0 to 4.0 mm. The cover has a Shore D hardness of 59 to 70 and has 313 to 371 dimples formed thereon. The ball has an initial velocity of at least 76.8 m/s, a coefficient of lift (CL) when hit of at least 0.165 at a Reynolds number of 70,000 and a spin rate of 2,000 rpm, and a coefficient of drag (CD) when hit of not more than 0.230 at a Reynolds number of 180,000 and a spin rate of 2,520 rpm. The golf ball has a carry which is long enough to make the ball advantageous for competitive play, in addition to which it has a good feel when hit and excellent durability to cracking with repeated impact.

REFERENCES:
patent: 5368304 (1994-11-01), Sullivan et al.
patent: 6428428 (2002-08-01), Kuttappa et al.
patent: 6709348 (2004-03-01), Lemons et al.
patent: 7238121 (2007-07-01), Watanabe et al.
patent: 2003/0096663 (2003-05-01), Kasashima et al.

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