Three-piece solid golf ball
AssigneeBridgestone Corporation
InventorsToshio Chikaraishi, Hidetoshi Ieiri, Kazuhiko Sugai, Kazuto Maehara
Life of this patent
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Abstract
The inner layer of the core has a diameter of 15-25 mm, a weight of 2-14 grams, a specific gravity of 1.2-4, and a hardness of 55-80 JIS C. The outer layer has a specific gravity lower than that of the inner layer by 0.1-3.0. The cover has a radial thickness of 1.5-2.5 mm. A three-piece solid golf ball comprising a two-piece solid core consisting of inner and outer layers and a cover enclosing the core is improved in durability and flying performance through a proper choice of physical parameters of the core inner and outer layers and the cover.
Claims8
A three-piece solid golf ball comprising:
- a two-piece solid core consisting of an inner layer and an outer layer and
- a cover enclosing the core, wherein
- said two-piece solid core consists of the inner layer having a diameter in the range of 15 to 25 mm, a weight in the range of 5 to 12 grams, a specific gravity of 1.56 to 4, and a hardness in the range of 55 to 80 in JIS C hardness scale, and the outer layer having a lower specific gravity than that of the inner layer by 0.5 to 1.5, and
- said cover having a radial thickness of 1.5 to 2.5 mm.
Dependencies are inferred from the claim text.