Patent ID: 6045457
Filing Date: 2000-04-04
Classification: A63B

Abstract:
A golf club shaft comprising:(a) an outer shaft defining a hollow portion, a head end, a head end section, a grip end section and a butt end of the grip end section;(b) an inner shaft apparatus generally parallel with the outer shaft and at least partially disposed withih the hollow portion of the outer shaft, wherein the inner shaft apparatus has a fixed first end region, a second end region that is closer to the head end than the first end region, and an intermediate section between the first end region and the second end region, wherein the second end region is disposed between the head end and the grip end section of the outer shaft, wherein during bending of the golf club shaft, at least the second end region of the inner shaft apparatus engages the inner surface of the outer shaft;wherein at least a portion of the intermediate section has clearance with the inner surface of the outer shaft when the outer shaft is not in bending, andwherein the outer shaft includes a bulged section surrounding a part of the intermediate section of the inner shaft apparatus and a head end section between the bulged section and the head end.