Hollow golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsKazuhisa Fushihara, Kiyoto Maruoka, Kazuo Hochi, Akihiro Nakahara
Life of this patent
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Abstract
A hollow golf ball having good shot feel at the time of hitting, while maintaining excellent flight performance, wherein the hollow golf ball has a hollow core having a hollow portion and one or more hollow core outer layers formed thereon, the hollow core outer layers having a core composition containing rubber, a resin or a mixture thereof, and a cover formed on the hollow core, and wherein the hollow portion has a diameter of 5 to 25 mm, the hollow core outer layer has a surface hardness of 71 to 91 in JIS-C hardness and a deformation amount of 2.0 to 3.5 mm when applying from an initial load of 10 kgf to a final load of 130 kgf on the core.
Claims7
A hollow golf ball comprising
- a hollow core composed of a hollow portion, which is void of any structure, and at least one hollow core outer layer, said hollow core outer layer having a composition comprising rubber, a resin or a mixture thereof, and a cover formed on the hollow core outer layer,
- wherein the hollow portion has a diameter of 10 to 20 mm, and the hollow core outer layer has a surface hardness of 77 to 91 in JIS-C hardness and a deformation amount of 2.0 to 3.5 mm when applying from an initial load of 10 kgf to a final load of 130 kgf on the core.
Dependencies are inferred from the claim text.