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US 6,659,890 B2Granted
Multi-piece solid golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsHisashi Yamagishi, Hiroshi Higuchi, Yasushi Ichikawa, Junji Hayashi
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AssigneeBridgestone Sports Co., Ltd.
InventorsHisashi Yamagishi, Hiroshi Higuchi, Yasushi Ichikawa, Junji Hayashi
Estimating the term…
A multi-piece solid golf ball includes a core having a structure with at least two layers and a cover on the core with an outer and inner cover layers. The core has a diameter in the range of 35 to 41 mm. The inner sphere of the core is formed of a rubber material based on polybutadiene and an outer layer is formed of a thermoplastic or rubber based material. The outer cover layer has a Shore D hardness of 40-60 degrees. The inner cover layer has a Shore D hardness of up to 53 degrees and lower than that of the outer cover layer. The ball's carry is comparable to conventional solid golf balls and spin receptivity is approximate to wound golf balls while the ball is durable and offers pleasant feel.
A multi-piece solid golf ball having a structure of at least four layers, said ball comprising a core having a structure consisting of at least two layers and a cover enclosing the core and consisting of inner and outer cover layers, said outer cover layer having a hardness of 40 to 60 degrees on Shore D, and said inner cover layer having a hardness of up to 53 degrees on Shore D and lower than that of said outer cover layer.
A multi-piece solid golf ball having a structure of at least four layers, said ball comprising;
A multi-piece solid golf ball having a structure of at least four layers, said ball comprising;
Dependencies are inferred from the claim text.