Hollow golf club head
US7588504B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 2005 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Aug 19, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B53/045
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
This invention provides a hollow golf club head in which the ratio of the rigidity of a sole portion to that of a crown portion is 1:0.1 to 0.8. This invention also provides a hollow golf club head in which a crown low-rigidity region is formed on the face side of the crown portion, and a crown high-rigidity region is formed on the back side of the crown portion. The ratio of the rigidity of the crown high-rigidity region to that of the crown low-rigidity region is 1:0.2 to 0.6. Furthermore, this invention provides a hollow golf club head in which a sole high-rigidity region is formed on the face side of the sole portion, and a sole low-rigidity region is formed on the back side of the sole portion. The ratio of the rigidity of the sole high-rigidity region to that of the sole low-rigidity region is 1:0.2 to 0.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.