PUTTER TYPE GOLF CLUB HEAD AND PUTTER TYPE GOLF CLUB

• US 20130005503A1
• Filed: 06/27/2012
• Published: 01/03/2013
• Est. Priority Date: 06/28/2011
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: Kii, Kenji
• Granted Patent: US 8,900,071 B2
• Time in Patent Office: Days
• US Class Current: 473/340
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0425 the face insert comprising two or more different materials
• CPC Class Codes: A63B 53/0429 the face insert comprising two or more layers of material
• CPC Class Codes: A63B 53/0487 for putters A63B53/065 takes precedence

Abstract

A putter type golf club head 1 having a face 2 for hitting a ball on a front side has a head main body 1A provided in a face 2 side with a concave portion 3 and a face insert 1B made of an elastic material attached to the concave portion 3 of the head main body 1A. The face insert 1B has a three-layered structure composed of a first layer 8 disposed in a frontmost side, a third layer 10 disposed in a rearmost side and a second layer 9 sandwiched between the first layer 8 and the third layer 10, wherein hardnesses h1, h2 and h3 and moduli of repulsion elasticity r1, r2 and r3 of the first layer 8, second layer 9 and third layer 10, respectively, satisfy relationships: h1>h2, h3>h2, r1>r2 and r3>r2.

Claims

1. A putter type golf club head having a face for hitting a ball on a front side, wherein

the head has a head main body provided in a face side with a concave portion, and a face insert made of an elastic material attached to the concave portion of the head main body,

the face insert has a three-layered structure made up of a first layer disposed in a frontmost side, a third layer disposed in a rearmost side and a second layer sandwiched between the first layer and the third layer,

the first layer, the second layer and the third layer have hardnesses h1, h2 and h3, respectively, and moduli of repulsion elasticity r1, r2 and r3, respectively, which satisfy the following relationships:

h1>

h2,

h3>

h2,

r1>

r2 and

r3>

r2.

2. The putter type golf club head according to claim 1, wherein the hardnesses and the moduli of repulsion elasticity of the first layer and the third layer satisfy the following relationships:

h1=h3 and

r1=r3.

3. The putter type golf club head according to the claim 1, in which, in the face insert, the first layer and the third layer are made of the same material.

4. The putter type golf club head according to claim 1, in which, in the face insert, only the third layer contacts with the head main body.

5. The putter type golf club head according to claim 1, in which the hardnesses of the first layer and the second layer satisfy the following relationship:

0<

h1-h2<

10 degrees.

6. The putter type golf club head according to claim 1, wherein the Shore D hardness of the first layer is 35 to 65 degrees.

7. The putter type golf club head according to claim 1, wherein the Shore D hardness of the first layer is not less than 40 degrees and not more than 63 degrees.

8. The putter type golf club head according to claim 1, wherein the modulus of repulsion elasticity r1 of the first layer is 50% to 70%.

9. The putter type golf club head according to claim 1, wherein the modulus of repulsion elasticity r1 of the first layer is not less than 53% and not more than 67%.

10. The putter type golf club head according to claim 1, wherein the thickness of the first layer is 0.3 to 4.0 mm.

11. The putter type golf club head according to claim 1, wherein the Shore D hardness of the second layer is 30 to 60 degrees.

12. The putter type golf club head according to claim 1, wherein the Shore D hardness of the second layer is not less than 35 degrees and not more than 57 degrees.

13. The putter type golf club head according to claim 1, wherein the modulus of repulsion elasticity r2 of the second layer is 30 to 60%.

14. The putter type golf club head according to claim 1, wherein the modulus of repulsion elasticity r2 of the second layer is not less than 33% and not more than 50%.

15. The putter type golf club head according to claim 1, wherein the thickness of the second layer is 1.0 to 5.0 mm.

16. The putter type golf club head according to claim 1, wherein the Shore D hardness of the third layer s 35 to 65 degrees.

17. The putter type golf club head according to claim 1, wherein the Shore D hardness of the third layer is not less than 40 degrees and not more than 63 degrees.

18. The putter type golf club head according to claim 1, wherein the modulus of repulsion elasticity r3 of the third layer is 50 to 70%.

19. The putter type golf club head according to claim 1, wherein the thickness of the third layer is 1.0 to 5.0 mm.

20. A putter type golf club having the putter type golf club head according to claim 1.