Golf club shaft

Details Golf club shaft Golf club shaft

2005-04-05

2005-04-05

Blau, Stephen (Department: 3711)

Games using tangible projectile

Golf

Club or club support

Reexamination Certificate

active

06875127

ABSTRACT:
In a golf club shaft, composed of a laminate of prepregs made of a fiber reinforced resin, the weight of a unit length of the golf club shaft in the axial direction thereof is set to not less than 0.25 g/cm nor more than 0.60 g/cm. Supposing that reinforcing fibers of the prepregs of a straight layer are parallel with the axial direction of the golf club shaft and that tensile moduli of elasticity of the reinforcing fibers are sequentially denoted by N1, N2, . . . Nn in the order from an innermost layer of the laminate to an outermost layer thereof,N1≧N2≧ . . . Nn and N1>Nn (n is an integer not less than 2) is established in a range at least 10% of the whole length of the golf club shaft.

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patent: 5721030 (1998-02-01), Okada
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patent: 11-70197 (1999-03-01), None
patent: 2001-46564 (2001-02-01), None

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