Patent ID: 7322892

Claim:
A golf ball comprising a resilient core made of rubber, a cover of one or more layers encasing the core, and at least one intermediate layer disposed between the core and the cover, wherein the cover is made primarily of polyurethane, the intermediate layer is made primarily of ionomer, and the core has a surface hardness which is higher than the material hardnesses of the cover and the intermediate layer, wherein, letting V be the initial velocity (m/s) of the ball as measured by a method set forth in the Rules of Golf using an initial velocity measuring apparatus of the same type as the USGA drum rotation-type initial velocity instrument and letting E be the deflection (mm) of the ball when subjected to compression from an initial load state of 98 N (10 kgf) to a final load of 1,275 N (130 kgf), the value of V/E is at most 28.