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Golf club head with a high coefficient of restitution

  • US 6,960,142 B2
  • Filed: 04/30/2003
  • Issued: 11/01/2005
  • Est. Priority Date: 04/18/2000
  • Status: Expired due to Term
First Claim
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1. A golf club head adapted for attachment to a shaft comprising:

  • a face having a total face area and a first primary resonant frequency less than about 2900 Hz, the face comprising;

    a central zone having a first perimeter and a first flexural stiffness, wherein the central zone comprises between 15% and 60% of the total face area, and wherein the central zone includes a geometric center of the face;

    an intermediate zone surrounding the first perimeter of the central zone, the intermediate zone having a second flexural stiffness, wherein the first flexural stiffness of the central zone is at least 25,000 lb-in and greater than the second flexural stiffness of the intermediate zone; and

    a perimeter zone around the intermediate zone, wherein the area of the perimeter zone is up to 30% of the total face area. wherein the face exhibits a coefficient of restitution greater than or equal to 0.81.

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