Golf club shaft and golf club
AssigneeDunlop Sports Co. Ltd.
InventorTatsuya YASHIKI
Life of this patent
Estimating the term…
Abstract
A golf club shaft has a tip end to which a golf club head is attached and a butt end to which a grip is attached, wherein the shaft is composed of a fiber reinforced resin having a fiber layer, the fiber layer contains a bias layer having bias fibers oriented at an angle with respect to an axial direction of the shaft, the bias layer includes a tip-side bias layer extending from the tip end toward the butt end and having a butt-side end terminating without reaching the butt end and a butt-side bias layer extending from the butt end toward the tip end and having a tip-side end terminating without reaching the tip end, and bias fibers in the tip-side bias layer has a tensile elastic modulus smaller than that of bias fibers of the butt-side bias layer.
Claims16
A golf club shaft having a tip end to which a golf club head is attached and a butt end to which a grip is attached, wherein
- the shaft is composed of a fiber reinforced resin having a fiber layer,
- the fiber layer contains a bias layer having bias fibers oriented at an angle with respect to an axial direction of the shaft,
- the bias layer includes:
- a tip-side bias layer extending from the tip end toward the butt end and having a butt-side end terminating without reaching the butt end;
- and
- a butt-side bias layer extending from the butt end toward the tip end and having a tip-side end terminating without reaching the tip end,
- each bias fiber in the tip-side bias layer has a tensile elastic modulus smaller than that of bias fibers in the butt-side bias layer, and
- the butt-side end of the tip-side bias layer and the tip-side end of the butt-side bias layer are provided in a same position in the axial direction of the shaft, or in a position where the tip-side bias layer and the butt-side bias layer overlap each other.
Dependencies are inferred from the claim text.