Golf club shaft with suppressed vibration modes
US6641489B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Jun 26, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2209/14
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A golf club having suppressed vibration modes is disclosed. The club comprises a shaft, a golf club head, a grip and a plurality of discrete shaft stiffeners. The shaft stiffeners are strategically located along the shaft so as to shift the nodes of at least the second and third flexural vibration modes of the club shaft such that a node of each of the second and third flexural vibration modes occurs both at the club face and within the region underlying the golf club grip. Preferably, the stiffeners are made of a shape memory alloy that can be shrunk onto the outside surface of the shaft, then expanded to permit the position of the stiffeners to be adjusted to suit the boundary conditions imposed by the human user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.