Multi-piece solid golf ball
First Claim
1. A multi-piece solid golf ball comprising a core, an intermediate layer enclosing the core to form a sphere, and a cover enclosing the intermediate layer, and numerous dimples formed on a surface of the cover, wherein each component has a Shore D hardness, a Deflection amount, an initial velocity (in m/s) and a thickness (in mm), the Deflection amount being defined as an amount of deflection (in mm) under load of a spherical body incurred when the load is increased from an initial value of 98 N (10 kgf) to a final value of 1275 N (130 kgf), and the ball satisfies the following requirements (1) to (4):
- (1) (Shore D hardness of the cover)−
(Shore D hardness of the intermediate layer)>
0, (2) (initial velocity of the sphere)−
(initial velocity of the core)>
−
0.2, (3) 0.90≦
(Deflection amount of the sphere)/(Deflection amount of the core)≦
1.00, (4) 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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Accused Products
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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Citations
9 Claims
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1. A multi-piece solid golf ball comprising a core, an intermediate layer enclosing the core to form a sphere, and a cover enclosing the intermediate layer, and numerous dimples formed on a surface of the cover, wherein each component has a Shore D hardness, a Deflection amount, an initial velocity (in m/s) and a thickness (in mm), the Deflection amount being defined as an amount of deflection (in mm) under load of a spherical body incurred when the load is increased from an initial value of 98 N (10 kgf) to a final value of 1275 N (130 kgf), and the ball satisfies the following requirements (1) to (4):
-
(1) (Shore D hardness of the cover)−
(Shore D hardness of the intermediate layer)>
0,(2) (initial velocity of the sphere)−
(initial velocity of the core)>
−
0.2,(3) 0.90≦
(Deflection amount of the sphere)/(Deflection amount of the core)≦
1.00,(4) 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification