Golf club shaft and golf club

Details Golf club shaft and golf club Golf club shaft and golf club

2007-05-08

2010-06-15

Blau, Stephen L. (Department: 3711)

Games using tangible projectile

Golf

Club or club support

Reexamination Certificate

active

07736245

ABSTRACT:
A golf club shaft2made of a fiber-reinforced resin having a weight W of 30 to 55 g calculated as a shaft having a length of 46 inches and an average flexural rigidity EIa of 1.5 to 4.0 kgf·m2and satisfying the equation: EIa≧0.1W−1.5. Since it is light weight but has a relatively high flexural rigidity, a golf club can be swung at high speed without deteriorating the flight direction performance.

REFERENCES:
patent: 5156396 (1992-10-01), Akatsuka et al.
patent: 5439219 (1995-08-01), Vincent
patent: 5685783 (1997-11-01), Akatsuka et al.
patent: 6273830 (2001-08-01), Takemura et al.
patent: 7297070 (2007-11-01), Ashida et al.
patent: 2002-253714 (2002-09-01), None

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