Golf club shaft
US6056648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1997 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Jun 20, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S273/23
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention relates to a golf club shaft which is easy to be gripped, and superior in strength and balance in its shaft portion. A golf club shaft is constituted by fiber-reinforced prepreg formed from reinforcing fibers impregnated with synthetic resin. A small-diameter portion is provided on a head side, a large-diameter portion is provided on a grip side, and a tapered portion is provided between the small-diameter portion and the large-diameter portion. An outer diameter of the small-diameter portion at its rear end portion is made smaller by 2 mm or more than an outer diameter of the large-diameter portion at its front end portion, and bending rigidity at the rear end portion is made to be 60 to 100% of that at the front end portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.