Golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsHironori TAKIHARA, Takahiro SAJIMA, Kohei MIMURA
Life of this patent
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Abstract
A golf ball 2 has a core 4, an inner cover 6, a main cover 8, and an outer cover 10. A product TH2 of a thickness T2 (mm) and a Shore C hardness H2 of the main cover 8 and a product THs of a value of 5% of a radius (mm) of the core 4 and a Shore C hardness Hs at a surface of the core 4 satisfy the following mathematical formula. 15≤(TH2−THs)≤100 A product TH1 of a thickness T1 (mm) and a Shore C hardness H1 of the inner cover 6, a product TH3 of a thickness T3 (mm) and a Shore C hardness H3 of the outer cover 10, and the product TH2 satisfy the following mathematical formula. 0.25<((TH1+TH3)/2)/TH2<0.65
Claims11
A golf ball comprising a core, an inner cover positioned outside the core, a main cover positioned outside the inner cover, and an outer cover positioned outside the main cover, wherein
- a product TH2 of a thickness T2 (mm) and a Shore C hardness H2 of the main cover and a product THs of a value of 5% of a radius (mm) of the core and a Shore C hardness Hs at a surface of the core satisfy the following mathematical formula,
- 15≤(TH2−THs)≤100
- a product TH1 of a thickness T1 (mm) and a Shore C hardness H1 of the inner cover, a product TH3 of a thickness T3 (mm) and a Shore C hardness H3 of the outer cover, and the product TH2 satisfy the following mathematical formula,
- 0.25<((TH1+TH3)/2)/TH2<0.65
- the golf ball has a plurality of dimples on a surface thereof,
- a standard deviation Su of areas of all the dimples is not greater than 1.70 mm2, and
- a standard deviation Pd of distances L between dimples of all neighboring dimple pairs is less than 0.500 mm.
Dependencies are inferred from the claim text.