Three-piece solid golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsHiroshi Higuchi, Hisashi Yamagishi, Yoshinori Egashira, Tadatoshi Yamada
Life of this patent
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Abstract
A three-piece solid golf ball comprising a center core, an intermediate layer, and a cover. The center core (1) has a diameter of at least 29 mm, a hardness in the range of 45-80 JIS C and a specific gravity of less than 1.4. The intermediate layer (2) has a thickness of at least 1 mm, a specific gravity of less than 1.2, and a hardness of at least 85 on JIS C scale. The cover (3) has a thickness of 1-3 mm and a hardness of 50-85 JIS C. The ball has a good total balance of properties in that feeling and controllability are improved at no sacrifice of flying performance and durability.
Claims9
A three-piece solid golf ball comprising;
- a center core, an intermediate layer, and a cover enclosing the core through the intermediate layer,
- said center core having a diameter of at least 29 mm and a specific gravity of less than 1.4,
- said intermediate layer having a thickness of at least 1 mm, a specific gravity of less than 1.2, and a hardness of at least 85 on JIS C scale, the specific gravity of said intermediate layer being lower than the specific gravity of said center core, and
- said cover having a thickness of 1 to 3 mm and being softer than said intermediate layer.
A three-piece solid golf ball, comprising:
- a center core, an intermediate layer, and a cover enclosing said center core through the intermediate layer;
- said center core having a diameter of at least 29 mm and a specific gravity of less than 1.4;
- said intermediate layer formed of an ionomer resin and having a thickness of at least 1 mm, a specific gravity of less than 1.2, and a hardness of at least 85 on JIS C scale, the specific gravity of said intermediate layer being lower than the specific gravity of said center core;
- and
- said cover having a thickness of 1 to 3 mm and being softer than said intermediate layer;
- and
- wherein said cover comprises thermoplastic polyester.
Dependencies are inferred from the claim text.