| 发明名称 | Golf ball | ||
| 摘要 | A core 4 of a golf ball 2 includes a center 10 and an envelope layer 12 positioned outside the center 10. The ratio of the volume of the core 4 to the volume of a phantom sphere of the golf ball 2 is equal to or greater than 78%. The difference (He−Ho) between a JIS-C hardness He at the surface of the core 4 and a JIS-C hardness Ho at the central point of the core 4 is equal to or greater than 15 but equal to or less than 40. The difference (H1−Ho) between a JIS-C hardness H1 at a point P1 that is located radially outward of the boundary between the center 10 and the envelope layer 12 and whose distance from the boundary is 1 mm and the JIS-C hardness Ho is equal to or greater than 0 but equal to or less than 2. | ||
| 申请公布号 | US8951148(B2) | 申请公布日期 | 2015.02.10 |
| 申请号 | US201213439018 | 申请日期 | 2012.04.04 |
| 申请人 | SRI Sports Limited | 发明人 | Matsuyama Yoshiko |
| 分类号 | A63B37/06;A63B37/00;C08G18/48;C08L75/08 | 主分类号 | A63B37/06 |
| 代理机构 | Birch, Stewart, Kolasch & Birch, LLP | 代理人 | Birch, Stewart, Kolasch & Birch, LLP |
| 主权项 | 1. A golf ball comprising a core, a mid layer positioned outside the core, and a cover positioned outside the mid layer, wherein the core comprises a center and an envelope layer positioned outside the center, a ratio of a volume of the core to a volume of a phantom sphere of the golf ball is equal to or greater than 78%, a difference (He−Ho) between a JIS-C hardness He at a surface of the core and a JIS-C hardness Ho at a central point of the core is equal to or greater than 15 but equal to or less than 40, and a difference (H1−Ho) between a JIS-C hardness H1 at a point P1 that is located radially outward of a boundary between the center and the envelope layer and whose distance from the boundary is 1 mm and the JIS-C hardness Ho at the central point of the core is equal to or greater than 0 but equal to or less than 2. | ||
| 地址 | Kobe JP | ||