Patent ID: 9433832
Filing Date: 2016-09-06
CPC Classification: A63B,C08K

Claim Text:
1. A multi-piece solid golf ball comprising a core, an envelope layer, an intermediate layer and a cover, wherein the core, envelope layer, intermediate layer and cover have respective surface hardnesses which satisfy the relationship: the surface hardness of the core and the surface hardness of the envelope layer, expressed in terms of Shore D hardness, satisfy the relationship: the surface hardness of the intermediate layer and the surface hardness of the cover, expressed in terms of Shore D hardness, satisfy the relationship: the ball and a sphere composed of the core covered peripherally by the envelope layer and the intermediate layer (intermediate layer-encased sphere) have respective initial velocities (m/s) which satisfy the relationship: the intermediate layer-encased sphere and a sphere composed of the core covered peripherally by the envelope layer (envelope layer-encased sphere) have respective initial velocities (m/s) which satisfy the relationship: the ball satisfies the relationship: where A is the deflection (mm) of the ball when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) and B is the deflection (mm) of the intermediate layer-encased sphere when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf), and wherein the surface hardness of the envelope layer and the surface hardness of the intermediate layer, expressed in terms of Shore D hardness, satisfy the relationship: