Golf putter shaft
AssigneeFujikura Rubber Ltd.
InventorsNorio Matsumoto, Tetsuto Minowa
Life of this patent
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Abstract
In a putter shaft having a tip end and a butt end, a curvature of the putter shaft is represented by a curvature curve of the putter shaft which increases monotonously from the tip end to the butt end. The curvature curve is defined as a curve showing variation of the curvature in a longitudinal axis direction of the putter shaft in a state where a load acts on the tip end to deform the putter shaft with the putter shaft being fixed at the butt end.
Claims7
A putter shaft having a tip end and a butt end, wherein a curvature of said putter shaft which is represented by a curvature curve of said putter shaft increases monotonously from said tip end to said butt end;
- wherein said curvature curve is defined as a curve showing variation of said curvature in a longitudinal axis direction of said putter shaft in a state where a load acts on said tip end to deform said putter shaft with said putter shaft being fixed at said butt end.
A putter shaft having a tip end and a butt end, wherein a flexural rigidity of said putter shaft which is represented by a flexural rigidity distribution curve of said putter shaft decreases monotonously from said tip end to said butt end, wherein said flexural rigidity distribution curve is defined as a curve showing variation of said flexural rigidity in a longitudinal axis direction of said putter shaft.
Dependencies are inferred from the claim text.