Patent ID: 8192299
Filing Date: 2012-06-05
Classification: A63B,Y10T

Abstract:
1. A golf club comprising: a head having a hosel having a hosel hole; a shaft; a shaft case having a shaft insertion hole to which one end of the shaft is inserted and configured to be inserted to the hosel hole, the shaft case comprising an air relief hole extending from a bottom of the shaft insertion hole through the shaft case; and a ring-shaped screw member configured to be screwed into one end of the hosel to fix the shaft case in the hosel hole, and to be fitted with an outer face of an one end of the shaft case so as not to contact with the shaft directly, wherein an axis of the shaft insertion hole is nonparallel to an axis of the hosel hole, and an inner face of the hosel hole and an outer face of the shaft case includes a triangular or more polygonal cross-sectional face that is perpendicular to the axis of the hosel hole when the shaft case is inserted to the hosel hole; wherein the other end of the shaft case is tapered into a portion having a polygonal section.