Patent ID: 6605007
Filing Date: 2003-08-12
Classification: A63B,G01N

Abstract:
A golf club head adapted for attachment to a shaft comprising:a shell defining an inner cavity; and a face having a total face area, and the face including a perimeter zone around an outer perimeter of the face and having a perimeter zone area being from 0 to 20% of the total face area; a central zone having a first flexural stiffness and including a geometric center of the face, the central zone further having a central zone area being between 15% and 60% of the total face area; and an intermediate zone surrounding the central zone, the intermediate zone having a second flexural stiffness; wherein the first flexural stiffness is at least three times greater than the second flexural stiffness and the face exhibits a coefficient of restitution of greater than or equal to 0.81, and wherein the central zone is formed of a first material and the intermediate zone is formed of a second material different from the first material.