Patent ID: 8834289
Filing Date: 2014-09-16
Classification: A63B

Abstract:
1. A golf club head, the club head comprising: a crown defining an upper surface of the golf club head; a sole defining a lower surface of the golf club head; a side wall extending between the crown and sole; a hosel extending from the crown and including a shaft bore; a face defining a ball-striking surface and intersecting the lower surface at a leading edge; and an elongate flexure that is recessed into the sole, extending in a generally heel-to-toe direction and parallel to the leading edge of the golf club head, and intersecting the side wall of the golf club head, wherein the flexure is defined by a curved first portion and a second portion that join at an apex, wherein the flexure has a height, a width and a curl length, wherein the height extends in the direction of a Y-axis of the golf club head between the apex and an outer surface of the sole, wherein the width extends in the direction of a Z-axis of the golf club head and is a distance of the opening in the sole of the flexure, wherein the curl length extends in the direction of the Z-axis and extends between a forward junction of the flexure with the sole and the apex, wherein the height of the flexure is between about 5.0 mm and 15.0 mm, wherein the width of the flexure between about 5.0 mm and about 12.0 mm, and wherein the flexure is tuned so that the width across the flexure in a face-to-aft direction varies sinusoidally, immediately after impact, at a frequency of about 2900 Hz to about 4000 Hz.