Golf club head

1. A wood-type golf club head comprising:

a main body; and

a striking wall associated with the main body, the striking wall having a striking face including a face center, a first imaginary plane tangent to the face center, and a rear surface opposite the striking face,

wherein, in a second imaginary plane perpendicular to the first imaginary plane and passing through the face center:

the striking face includes, specific to the second imaginary plane, a first point associated with a maximum thickness, t max , of the striking wall, and a second point associated with a minimum thickness, t min , of the striking wall, such that a ratio, t max /t min , is no less than 1.70, the first point generally coincident with the face center; and

the striking wall gradually tapers in thickness entirely from the first point to the second point.

2. The golf club head of claim 1 , wherein at least a portion of the main body is formed of a material having an elongation of at least about 10%.

3. The golf club head of claim 1 , wherein the ratio, t max /t min , is no less than 1.75.

4. The golf club head of claim 1 , wherein the ratio, t max /t min , is no less than 1.80.

5. The golf club head of claim 1 , wherein the minimum thickness, t min , is no greater than 2.75 mm.

6. The golf club head of claim 5 , wherein the minimum thickness t min is no greater than 2.50 mm.

7. The golf club head of claim 1 , wherein a first coefficient of restitution value, measured at the lace center, is less than 0.83, and a second coefficient of restitution value, measured at a striking face location spaced from the face center, is greater than the first coefficient of restitution value.

8. The golf club head of claim 1 , wherein, in the second imaginary plane, the thickness of the striking wall gradually tapers entirely from the face center to the striking face perimeter.

9. A wood-type golf club head comprising:

a main body; and

a striking wall associated with the main body, the striking wall having a striking face including a face center, a first imaginary plane tangent to the face center, and a rear surface opposite the striking face,

wherein, in a second imaginary plane perpendicular to the first imaginary plane and passing through the face center:

the striking face includes, specific to the second imaginary plane, a first point associated with a maximum thickness, t max , of the striking wall, and a second point associated with a minimum thickness, t min , of the striking wall, such that a ratio, t max /t min , is no less than 1.70, the first point generally coincident with the face center; and

the striking wall gradually tapers in thickness entirely from the first point to the second point; and

wherein an intersection between the first imaginary plane and the second imaginary plane forms a horizontal line when the club head is oriented in a reference position.

10. The golf club head of claim 9 , wherein at least a portion of the main body is formed of a material having an elongation of at least about 10%.

11. The golf club head of claim 9 , wherein the ratio, t max /t min , is no less than 1.75.

12. The golf club head of claim 9 , wherein the minimum thickness, t min , is no greater than 2.75 mm.

13. The golf club head of claim 9 , wherein a first coefficient of restitution value, measured at the face center, is less than 0.83, and a second coefficient of restitution value, measured at a striking face location spaced from the face center, is greater than the first coefficient of restitution value.

14. The golf club head of claim 9 , wherein, in the second imaginary plane, the thickness of the striking wall gradually tapers entirely from the face center to the striking face perimeter.

15. A wood-type golf club head comprising;

a main body; and

a striking wall associated with the main body, the striking wall having a striking face including a face center, a first imaginary plane tangent to the face center, and a rear surface opposite the striking face;

wherein,

in a second imaginary plane perpendicular to the first, imaginary plane and passing through the face center:

the striking face includes, specific to the second imaginary plane, a first point associated with a maximum thickness, t max , of the striking wall, and a second point associated with a minimum thickness, t min , of the striking wall, such that a ratio, t max /t min , is no less than 1.70, the maximum thickness, t max , being no less than 4.25 mm, the first point generally coincident with the face center; and

the striking wall gradually tapers in thickness entirely from the first point to the second point.

16. The golf club head of claim 15 , wherein at least a portion of the main body is formed of a material having an elongation of at least about 10%.

17. The golf club head of claim 15 , wherein the ratio, t max /t min , is no less than 1.75.

18. The golf club head of claim 15 , wherein the minimum thickness, t min , is no greater than 2.75 mm.

19. The golf club head of claim 15 , wherein a first coefficient of restitution value, measured at the face center, is less than 0.83, and a second coefficient of restitution value, measured at a striking face location spaced from the face center, is greater than the first coefficient of restitution value.

20. The golf club head of claim 15 , wherein, in the second imaginary plane, the thickness of the striking wall gradually tapers entirely from the face center to the striking face perimeter.