Golf ball
US6210291A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1997 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Apr 4, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2037/087
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention provides a golf ball exhibiting excellent shot feel, long flight distance and easy applicability of spin when hit by short irons. The golf ball comprises a thread wound core and a cover covering the thread wound core, the thread wound core comprising a solid center and a thread rubber layer formed by winding thread rubber around the solid center, wherein the solid center has a diameter of 30 to 38 mm, a surface hardness, determined by JIS-C hardness meter, of 40 to 90 and a hardness difference between the center point and the surface, determined by JIS-C hardness meter, of within 5, the solid center also has a deformation amount of 0.5 to 2.5 mm, the deformation amount being determined by applying a weight of from an initial load of 10 Kg to a final load of 30 Kg on the solid center and measuring a change of the deformation of the solid center by mm, and the cover is formed from a base resin mainly containing an ionomer resin and has a flexural modulus of 50 to 300 MPa and a Shore D hardness of 40 to less than 60.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.