Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsHirotaka SHINOHARA, Daichi MIZUTANI
Life of this patent
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Abstract
In a golf ball having a core, a cover and at least one intermediate layer formed therebetween, the core, intermediate layer and cover have respective specific gravities with a standard deviation of not more than 0.07 or less, the cover has a material hardness on the Shore D hardness scale of 52 or less, and the ball has a deflection when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) which is 2.8 mm or less. The amount of deviation in the ball center of gravity is exceedingly small, increasing the straightness with which the ball rolls on putts with a putter.
Claims9
A golf ball comprising a core, a cover and at least one intermediate layer formed therebetween, wherein the core, intermediate layer and cover have respective specific gravities with a standard deviation of 0.07 or less, the cover has a material hardness on the Shore D hardness scale of 52 or less and the ball has a deflection when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) which is 2.8 mm or less.
Dependencies are inferred from the claim text.