Invention Grant
US08852022B2 Golf-club shafts having selectable-stiffness tip regions, and golf clubs comprising same 有权
具有可选择刚度的尖端区域的高尔夫球杆杆和包括其的高尔夫球杆

Golf-club shafts having selectable-stiffness tip regions, and golf clubs comprising same
Abstract:
The subject golf clubs have a shaft and clubhead. The shaft has a tip-end coupled to the clubhead, a butt-end, a reduced-EI portion located adjacent the tip-end, and a remaining portion extending between the butt-end and the reduced-EI portion. The portions are coupled together at an interface. The remaining portion exhibits a respective rate of stiffness reduction as a function of distance from the butt-end. The reduced-EI portion is typically shorter than and has less stiffness than the remaining portion. The reduced-EI portion exhibits a respective rate (which can be zero) of stiffness reduction as a function of distance toward the tip-end. These rates can be similar or different. The interface can exhibit a greater rate in stiffness reduction than the other portions.
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