Thread-wound golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorTakashi Sasaki
Life of this patent
Estimating the term…
Abstract
In a thread-wound golf ball having a cover wrapped around a rubber thread layer formed by winding a rubber thread around a center, the volume ratio of the rubber thread layer to the thread-wound golf ball is 10-20%. When deformation formed by applying an initial load of 98N to a final load of 1274N to the center is A, and deformation formed by applying an initial load of 98N to a final load of 1274N to a thread-wound core having a rubber thread wound around the center is B, the difference therebetween (A−B) is 0.5-0.7 mm. The cover includes thermoplastic polyurethane based elastomer as the main material. The shore D hardness of the cover is 40-55.
Claims9
A thread-wound golf ball having a cover wrapped around a rubber thread layer formed by winding a rubber thread around a center, wherein a ratio of volume of said rubber thread layer to the volume of said
- thread-wound golf ball is 10-20%,
- when deformation formed by applying an initial load of 98N to a final load of 1274N to said center is A, and deformation formed by applying an initial load of 98N to a final load of 1274N to a thread-wound core having a rubber thread wound around said center is B, a difference therebetween (A−B) is 0.5-0.7 mm,
- said cover including thermoplastic polyurethane based elastomer as a main material, and
- said cover having a shore D hardness of 40-55.
Dependencies are inferred from the claim text.