Games using tangible projectile – Golf – Ball
Reexamination Certificate
2007-04-10
2007-04-10
Trimiew, Raeann (Department: 3711)
Games using tangible projectile
Golf
Ball
Reexamination Certificate
active
11325461
ABSTRACT:
A multi-piece solid golf ball exhibits a good profile of rebound, feel and durability suited for low head speed amateur players when it satisfies the requirements that (Shore D hardness of the cover)−(Shore D hardness of the intermediate layer)>0, (initial velocity (in m/s) of the core enclosed with the intermediate layer)−(initial velocity (in m/s) of the core)>−0.2, 0.90≦(Deflection amount of the core enclosed with the intermediate layer)/(Deflection amount of the core)≦1.00, the total of the thickness of the intermediate layer and the thickness of the cover is up to 3.0 mm, and the ball has 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.
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Hayashi Junji
Kasashima Atsuki
Takesue Rinya
Watanabe Hideo
Bridgestone Sports Co. Ltd.
Trimiew Raeann
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