Golf club shaft
AssigneeFujikura Rubber Ltd.
InventorNorio Matsumoto
Life of this patent
Estimating the term…
Abstract
A golf club shaft made of a composite of a fiber material and a synthetic resin material, wherein the fiber material includes triaxial fabric layers which are located at least on the butt end side and the tip end side of the golf club shaft. Either the fiber density, the kind of the fiber, the physical property of the fiber, or a combination of two or more thereof, of yarn paths of three directions that form the triaxial fabric layers is varied with respect to the longitudinal axis of the shaft in accordance with a required specification of the shaft.
Claims13
A golf club shaft having a longitudinal axis and butt and tip ends and made of a composite of fiber material and a synthetic resin material, wherein said fiber material comprises a plurality of discrete cylindrical or frusto-conical units made of triaxial fabric having fibers defining three yarn paths of three directions, said units having an arrangement along the longitudinal axis of the shaft such as to be respectively located at different locations along the longitudinal axis of the shaft with at least two of the units being located on the butt end side and with at least two of the units being located on the tip end side of said shaft;
- wherein said units have characteristics of length, thickness, fiber density, kind of fiber, and physical property of fiber;
- and wherein one or more of said characteristics or the arrangement of the discrete units along the longitudinal axis of the shaft is varied in accordance with a required specification of said shaft.
A golf club shaft having a longitudinal axis and butt and tip ends and made of a composite of fiber material and a synthetic resin material, the fiber material including a plurality, of annular layers of fabric superimposed on one another and surrounding said longitudinal axis, wherein one of said layers of fiber material comprises a plurality of discrete cylindrical or frust-oconical units made of triaxial fabric having three yarn paths of three different directions, said units being respectively located at different locations along the longitudinal axis of the shaft over at least a portion of the length of the shaft and at least two of said units being located at one of said ends of the shaft.
Dependencies are inferred from the claim text.