Games using tangible projectile – Golf – Club or club support
Reexamination Certificate
2006-02-28
2008-03-04
Blau, Stephen (Department: 3711)
Games using tangible projectile
Golf
Club or club support
Reexamination Certificate
active
07338386
ABSTRACT:
A light-weighted golf club shaft, which can stabilize the swing orbit of a club head during a swing and can allow a player to swing a golf club easily and to have a consistent shot pattern, is provided. The golf club shaft has a length of 42 to 48 inches and a weight of 35 to 50 grams. A center of gravity of the shaft is located within 46.0 to 49.0% of its entire length from its tip end and a torque to the tip-end of the shaft ranges between 3.0 and 4.5 degrees. The shaft may comprise a longitudinal layer and a biased layer. The biased layer may comprise carbon fibers having a modulus of elasticity of not less than 40 t/mm2. The ratio of the number of turns of prepreg sheets for the biased layer in the tip-end portion to that in the butt-end portion of the shaft may range between 3:1 and 3:2.
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Blau Stephen
Bridgestone Sports Co. Ltd.
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