Patent ID: 6533677
Filing Date: 2003-03-18
Classification: A63B,B29C,B29L

Abstract:
An anisotropic golf club shaft comprising a laminate of a plurality of fiber reinforced resinous layers having one pair of angle layers consisting of, relative to the center of the shaft, a centermost first angle layer and a centermost second angle layer, or having a plurality of pairs of angle layers consisting of first and second angle layers, such that a fiber of said first angle layer(s) and that of said second angle layer(s) incline in opposite directions at an angle 20Â°-35Â° with respect to an axis of said golf club shaft, wherein:said first angle layer(s) and said second angle layer(s) are wound by only 1.5 turns in a cross-sectional face of said golf club shaft and said 1.5 turns of said first and second angle layers continue along an axis of said shaft; a winding start point of said first and that of said second angle layers are dislocated at 180Â° in a circumferential direction of said golf club shaft; and in a cross-sectional face of said golf club shaft, a part consisting of two first angle layers and one second angle layer layered one upon another and a part consisting of one first angle layer and two second angle layers layered one upon another are formed to differentiate constructions consisting of said first and second angle layers of both of said parts.