Wound golf ball
US5674137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1995 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Aug 1, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2037/087
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A wound golf ball comprising a liquid center, thread rubber wound thereon, and a cover enclosing the wound center, wherein PA1 said cover has a multi-layer structure having a total thickness of 1.0 to 4.0 mm and including an outer layer having a first hardness and a thickness of 0.4 to 3.0 mm and an inner layer having a second hardness higher than the first hardness, the outer layer of said cover being formed of a first resin having a Shore D hardness of 40 to 55, and the inner layer is formed of a second resin having a Shore D hardness of 55 to 68, the difference in hardness between the first and second resins being at least 5 in Shore D hardness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.