Metal matrix composite shafts for golf clubs
US6273829A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2204/00
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Formed tubular sporting articles subjected to repeated flexure such as golf club shafts are made from metal matrix composite materials (MMCs) in which a metal alloy matrix is discontinuously reinforced with undissolved particles or platelets in proportions to result in an article having a variable wall thickness, and a minimum modulus of elasticity of 10.4 and a minimum yield strength and minimum modulus of elasticity related by the equation: EQU Y=71+6.84(E-10.4) where Y is yield strength in KSI and E is modulus of elasticity in units.times.10.sup.6 psi. The sporting articles are lighter than conventional and have a modulus of elasticity substantially less than that of ordinary MMCs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.