Patent ID: 6835144
Filing Date: 2004-12-28
Classification: A63B

Abstract:
A golf club head comprising:a club face; a back portion; a recess defined by a perimeter wall in the back portion and a back surface of the club face; a polymer material substantially filling the recess and attaching to the club head only by a perimeter surface bonded to the perimeter wall, wherein a predetermined void is defined directly between the back surface and the polymer material; and a medallion attached directly to the polymer material, the polymer mateilal having a first specific gravity and the medallion having a second specific gravity greater than the first, wherein upon an impact of the club head and a golf ball, a spring/mass type of vibration dampening is created that will cause the polymer and medallion to react and vibrate, whereby unwanted vibrations are dampened with respect to shear properties of the polymer material.