Patent ID: 6494793
Filing Date: 2002-12-17
Classification: A63B

Abstract:
A two-piece solid,golf ball comprising a core and a cover formed on the core, whereina center hardness in JIS-C hardness of the core is represented by A, a core inward hardness in JIS-C hardness at a distance of 5 mm inward from the surface of the core is represented by B, a surface hardness in JIS-C hardness of the core is represented by C, a cover hardness in JIS-C hardness is represented by D, a distance in mm between a center point of the core and a point of 5 mm inward from the surface of the core is represented by K and a radius in mm of the golf ball is represented by L, the golf ball satisfies the following relations; 58&lE;A<65, 80&lE;B&lE;87, 78<C, C is lower than B by 1 to 5, and 0.9&lE;[(Dâˆ’B)/(Lâˆ’K)]/[(Bâˆ’A)/K]&lE;2.0; and wherein a ratio (a/b) of the deformation amount of the core (a) to a deformation amount of the golf ball (b) when applying from an initial load of 10 kgf to a final load of 130 kgf is within the range of 1.05 to 1.25.