Multi-sectional co-cured golf shaft
US8157669B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2009 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Jan 17, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2209/00
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A shaft for a golf club having a total length and a total weight. The shaft includes first and second tubular portions. The first and second tubular portions are formed of first and second materials, respectively. The second tubular portion has a proximal end and a tip end. The tip end has an outside diameter of less than 0.400 inches. The distal end of the first tubular portion is co-cured to the proximal end of the second tubular portion. The shaft has a resistance to twisting about a longitudinal axis of the shaft, when tested under a torsional stability test and measured at an approximate midpoint of the total length of the shaft, of less than 2.0 degrees in a torsional stability test. The shaft when measured from the tip end of the shaft in a balance point test device has a balance point of less than 46 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.