Multi-piece solid golf ball
First Claim
1. A multi-piece solid golfball 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), (11)&
- (12);
(1) (Shore D hardness of the cover)−
(Shore D hardness of the intermediate layer)>
0,(2A) (initial velocity of the core)−
(initial velocity of the ball)≧
0,(3) 0.87≦
(Deflection amount of the sphere)/(Deflection amount of the core)≦
0.97,(4) the total of the thickness of the intermediate layer and the thickness of the cover is up to 3.0 mm,(11) (Deflection amount of the golf ball)/(Deflection amount of the sphere)≦
0.98, and(12) (Shore D hardness of core surface)−
(Shore D hardness of core center)≧
15.
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Accused Products
Abstract
In the present invention, by optimizing the balance of Shore D hardness between the intermediate layer and the cover, the balance of Shore D hardness between the surface and the center in the core, the balance of initial velocity between the core and the sphere, and the balance of Deflection amount between the core and the sphere are optimized, and the total thickness of the intermediate layer and the cover, the inventive golf ball is given a good profile of rebound, feel, controllability and durability.
28 Citations
6 Claims
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1. A multi-piece solid golfball 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), (11)&
- (12);
(1) (Shore D hardness of the cover)−
(Shore D hardness of the intermediate layer)>
0,(2A) (initial velocity of the core)−
(initial velocity of the ball)≧
0,(3) 0.87≦
(Deflection amount of the sphere)/(Deflection amount of the core)≦
0.97,(4) the total of the thickness of the intermediate layer and the thickness of the cover is up to 3.0 mm, (11) (Deflection amount of the golf ball)/(Deflection amount of the sphere)≦
0.98, and(12) (Shore D hardness of core surface)−
(Shore D hardness of core center)≧
15. - View Dependent Claims (2, 3, 4, 5, 6)
- (12);
Specification