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US 6,319,152 B1Granted
Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsRinya Takesue, Yasushi Ichikawa, Shunichi Kashiwagi
Life of this patent
Estimating the term…
Abstract
A cover stock composed mainly of a heated mixture of a thermoplastic polyurethane elastomer and a styrene base block copolymer is suitable for the manufacture of golf balls. The cover made of the stock offers a very soft feel with little shock, the ease of control and improved scuff resistance.
Claims19
A solid golf ball comprising:
- a solid core and a cover, wherein a core composition for the solid core contains cis-1,4-polybutadiene as a main component, the cover having a gage in the range of 1 to 4 mm and the polymer stock for the cover consist of a mixture of a thermoplastic polyurethane elastomer and a styrene base block copolymer, said thermoplastic polyurethane elastomer having a Shore D hardness in the range of 35 to 55, said styrene base block copolymer having a JIS A hardness of 50 to 98, and said mixture having a Shore D hardness in the range of 35 to 55.
A wound golf ball comprising:
- a wound core having a center and a thread rubber formed by winding around the center and a cover, the cover having a gage in the range of 1 to 4 mm, and the polymer stock for the cover consist of a mixture of a thermoplastic polyurethane elastomer and a styrene base block copolymer, said thermoplastic polyurethane elastomer having a Shore D hardness in the range of 35 to 55, said styrene base block copolymer having a JIS A hardness of 50 to 98, and said mixture having a Shore D hardness in the range of 35 to55.
Dependencies are inferred from the claim text.