Golf club head with a high coefficient of restitution
First Claim
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.
4 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a golf club head provided with a face and a body. The face has a central zone and a intermediate zone adjacent and surrounding the central zone. The central zone has a first flexural stiffness and the intermediate zone has a second flexural stiffness. The club head face is configured and dimensioned such that the first flexural stiffness is significantly greater than the second flexural stiffness such that upon ball impact with the face, the intermediate zone exhibits substantial deformation so that the central zone moves into the club head. At the same time, the central zone exhibits minimal deformation so that it moves into and out of the club head as a unit. Furthermore, the face exhibits a high coefficient of restitution.
-
Citations
28 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. 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, and a central zone area being at least 15% of the total face area, and the central zone including a geometric center of the face; and
an intermediate zone surrounding the first perimeter of the central zone, the intermediate zone having a second flexural stiffness, and the first flexural stiffness is at least 25,000 lb-in and greater than the second flexural stiffness. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
-
-
23. A golf club head adapted for attachment to a shaft comprising:
-
a face having a total face area, the face comprising;
a central zone having a first perimeter and a first flexural stiffness, wherein the central zone comprises a geometric center of the face, wherein the central zone comprises at least 15% of the total face area, and wherein upon ball impact the central zone exhibits a first deformation amount; and
an intermediate zone surrounding the first perimeter, wherein the intermediate zone has a second perimeter and a second flexural stiffness, wherein a ratio of the first flexural stiffness to the second flexural stiffness is at least 3, and wherein upon ball impact the intermediate zone exhibits a second deformation amount substantially greater than the first deformation amount. - View Dependent Claims (24, 25, 26, 27, 28)
-
Specification