초록 ▼

The invention relates to a shaft for a golf club, or to a club equipped with such a shaft. On at least 30% of the length of the shaft, its peripheral wall includes at least two layers, i.e., a first layer made of a material of density (r1) and of longitudinal Young\s modulus (E1), and a second layer

The invention relates to a shaft for a golf club, or to a club equipped with such a shaft. On at least 30% of the length of the shaft, its peripheral wall includes at least two layers, i.e., a first layer made of a material of density (r1) and of longitudinal Young\s modulus (E1), and a second layer made of a material of density (r2) and of longitudinal Young\s modulus (E2), the first and second layers being separated by a separation layer made of a substantially isotropic material having a density (r3) and a longitudinal Young\s modulus (E3), the densities (r1, r) of the materials of the first and second layers being greater than the density (r3) of the material of the separation layer, the longitudinal Young\s moduli (E1, E2) of the materials of the first and second layers being respectively greater than 20 GPa, and the longitudinal Young\s modulus (E3) of the material of the separation layer being lower than 20 GPa.

대표청구항 ▼

A golf club shaft comprising: an elongated tube extending along an axis, the tube being demarcated by an exterior surface, an interior surface, a tip adapted to be affixed to a club head, and a butt adapted to be affixed to a grip, a predeterminate thickness separating the exterior surface from the

A golf club shaft comprising: an elongated tube extending along an axis, the tube being demarcated by an exterior surface, an interior surface, a tip adapted to be affixed to a club head, and a butt adapted to be affixed to a grip, a predeterminate thickness separating the exterior surface from the interior surface to form a peripheral wall comprising several layers of materials, wherein on at least 30% of the length of the tube, the peripheral wall comprises at least two layers, a first layer made of a material with a density (rrrrrr20 GPa, and the longitudinal Young\s modulus (E3) of the material of the separation layer being lower than 20 GPa.