Multi-piece golf ball, manufacturing method thereof and mold for manufacturing the same
US7192367B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2004 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Aug 19, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/02
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention provides a multi-piece golf ball comprising a core 3, a first intermediate layer 5, a second intermediate layer 7, and a cover 9, wherein the first intermediate layer 5 comprises a plurality of ribs 51 formed on the core 3; the second intermediate layer 7 is placed in concave portions surrounded by the ribs 51; and the cover 9 forms an outermost layer; with each of the ribs extending so that its width increases from the cover side to the core side; the concave portions being shaped into a funnel-like form by the side surfaces of the ribs; the hardness of the core 3, the first intermediate layer 5 and the second intermediate layer 7 being different from each other; and the hardness of the first intermediate layer 5 being greater than that of the second intermediate layer 9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.