Golf club shaft

Details Golf club shaft Golf club shaft

2007-02-06

2007-02-06

Blau, Stephen (Department: 3711)

Games using tangible projectile

Golf

Club or club support

Reexamination Certificate

active

10844106

ABSTRACT:
It is object of the present invention to provide a golf club shaft superior in accuracy, minimizing a displacement between thermosetting resin layers, capable of obtaining a feeling close to the feeling of a steel shaft, and superior in stability. To solve the above problems, a golf club shaft of the present invention uses a golf club shaft comprising a torsional rigidity holding layer made of thermosetting resin including reinforcing fibers diagonally crossed in the longitudinal direction of said shaft and a UD flexural rigidity holding layer made of thermosetting resin including reinforcing fibers aligned in parallel to the longitudinal direction of said shaft, characterized in that at least a part of said torsional rigidity holding layer includes a plain weave fabric layer obtained by winding and curing like a shaft-shape a plain weave prepreg which lets a plain weave fabric having mutually woven warps and wefts impregnate with thermosetting resin in such a way that said warps and wefts are diagonally crossed in the longitudinal direction of said shaft.

REFERENCES:
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patent: 5686155 (1997-11-01), Suzue et al.
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patent: 6270426 (2001-08-01), Matsumoto
patent: 2002/0003004 (2002-01-01), Guckert et al.

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