Multi-piece solid golf ball
US7367901B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2007 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Jan 11, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/02
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A multi-piece solid golf ball is composed of a multilayer core having at least an inner core layer and an outer core layer, one or more cover layer which encloses the core, and numerous dimples formed on a surface of the cover layer. The golf ball is characterized in that at least one cover layer is made primarily of an ionomer resin, the following hardness conditions (1) to (3) are satisfied:(JIS-C hardness of cover)−(JIS-C hardness at center of core)≧27, (1)23≦(JIS-C hardness at surface of core)−(JIS-C hardness at center of core)≦40, and (2)0.50≦[(deflection amount of entire core)/(deflection amount of inner core layer)]≦0.75, (3)the number of dimples is from 250 to 390 dimples, and the ball has an initial velocity of at least 76.8 m/s. These features enable the ball to travel a longer distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.