Golf ball
US10080929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2017 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Jun 15, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/0063
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A golf ball 2 includes a core 4, one or more mid layers 6, a cover 8, and dimples 10. A central hardness Ho and a surface hardness Hs of the core 4, a hardness Hm(min) of a layer having a lowest hardness among the mid layers 6, and a hardness Hc of the cover 8 satisfy the following mathematical formulas (1) to (4). Hs−Ho>15 (1)Hc−Hm(min)>20 (2)−10<Hm(min)−Ho<15 (3)5<Hc−Hs<20 (4) An occupation ratio So and a ratio Rs of a number of the dimples 10 each having a diameter of from 9.60% to 10.37% of a diameter of the golf ball 2, relative to a total number of the dimples 10, satisfy the following mathematical formula (5). Rs≥−2.5*So+273 (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.