Golf ball
US9849340B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2015 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Oct 16, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/0075
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A golf ball 2 has a large number of dimples 10 on a surface thereof. The contours of the dimples 10 are non-circular. A standard deviation of areas of the dimples 10 is equal to or less than 1.7 mm2. A ratio of a total area of the dimples 10 relative to a surface area of a phantom sphere of the golf ball 2 is equal to or greater than 80%. By comparting lines CS obtained by projecting sides of a regular dodecahedron, which is inscribed in the phantom sphere, onto the phantom sphere, a surface of the phantom sphere can be divided into 12 units Ut each of which meets the following mathematical formula (I):−2≦(Nt/12)−Nu≦2 (I),where Nt represents the total number of the dimples 10 and Nu represents the number of the dimples 10 on one unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.