Golf club head having supported striking face
A golf club head having a supported striking face is disclosed herein. More specifically, the golf club head in accordance with the present invention has a striking face, an internal support layer, and an intermediary sandwiched layer juxtaposed between the striking face and the internal support layer.
1. An iron type golf club comprising:
a golf club head, a grip and a shaft therebetween, wherein the golf club head comprises:
a striking face portion located at a frontal portion of the golf club head and an aft body portion attached to the striking face portion forming a cavity therebetween and forming a topline portion, a sole portion, a toe portion, a heel portion and a hosel, the striking face portion having a striking face portion face center, a striking face portion back surface, and a thickness of between 0.6 mm and 2.4 mm at the face center;
an internal support layer located in the cavity and coupled to the aft body portion, the internal support layer having an internal support layer front surface; and
an intermediary sandwiched layer juxtaposed between the striking face portion and the internal support layer and being comprised of a polymeric material having a sandwiched face layer hardness of less than 75 Shore A, the intermediary sandwiched layer having a thickness of 1 mm and 10 mm at the face center, and the intermediary sandwiched layer having an intermediary sandwiched layer front surface and a intermediary sandwiched layer back surface, and;
wherein the internal support layer front surface abuts between 25% and 75% of the intermediary sandwiched layer back surface.
2. The golf club of claim 1 , wherein the intermediary sandwiched layer front surface abuts between 90% and 100% of the striking face portion back surface.
3. The golf club of claim 1 , wherein the internal support layer comprises a perimeter support portion circumscribing the cavity and having a width of between 2 mm and 20 mm and a thickness of between 0.5 mm and 5 mm.
4. The golf club of claim 3 , wherein the internal support layer further comprises a horizontal support section extending from a heel section of the perimeter support portion to a toe section of the perimeter support portion.
5. The golf club of claim 3 , wherein the internal support layer further comprises a vertical support section extending from a topline section of the perimeter support portion to a sole section of the perimeter support portion.
6. The golf club of claim 3 , wherein the internal support layer is comprised of steel and is integrally cast with the aft body portion.
7. The golf club of claim 3 , wherein the internal support layer is comprised of a thermoplastic material having an internal support layer tensile strength that is at least 10 times greater than an intermediary sandwiched layer tensile strength.
8. The golf club of claim 1 , wherein the striking face portion has a thickness of between 1.4 mm and 1.8 mm at the face center.
9. The golf club of claim 1 , wherein the intermediary sandwiched layer has a thickness of 4 mm and 7 mm at the face center.
10. The golf club of claim 3 , wherein the perimeter support portion has a topline width WTL adjacent the topline portion that is between 2 mm and 5 mm and a sole width WS adjacent the sole portion that is between 6 mm and 20 mm.
11. The golf club of claim 10 , wherein the sole width WS is at least 1.5 times greater than the topline width WTL.
12. The golf club of claim 4 , wherein the horizontal support section has a horizontal support width WH between 5 mm and 10 mm.
13. The golf club of claim 5 , wherein the vertical support section has a vertical support width WV between 8 mm and 15 mm.
14. The golf club of claim 13 , wherein the vertical support section has a center portion that is closer to the striking face portion such that the intermediary sandwiched layer has a face center thickness that is between 80% and 40% of an intermediary sandwiched layer thickness closer to the toe portion.
15. The golf club of claim 13 , wherein the vertical support section has a center portion that is closer to the striking face portion such that the intermediary sandwiched layer has a first thickness at face center that is between 80% and 40% of an intermediary sandwiched layer thickness closer to the heel portion.
16. An iron type golf club comprising:
a golf club head, a grip and a shaft therebetween, wherein the head comprises:
a striking face portion located at a frontal portion of the golf club head and an aft body portion attached to the striking face portion forming a cavity therebetween, a topline portion, a sole portion, a toe portion, a heel portion and a hosel, the striking face portion having a face center and a thickness of between 0.8 mm and 2.4 mm at the face center;
an internal support layer coupled to the aft body portion such that it is located in the cavity and has a forward-facing front surface; and
an intermediary sandwiched layer juxtaposed between the striking face portion and the internal support layer, the intermediary sandwiched layer having a thickness of 1 mm and 10 mm at the face center, the intermediary sandwiched layer having an intermediary sandwiched layer back surface and front surface, said intermediary sandwiched layer being comprised of a polymeric material having a sandwiched face layer tensile strength of between 4 MPa and 20 MPa;
wherein the internal support layer comprises a thermoplastic material having a support layer tensile strength of between 60 MPa and 300 MPa and wherein the internal support layer comprises a perimeter support portion circumscribing the cavity and having a perimeter width of between 2 mm and 20 mm and a thickness of between 0.5 mm and 5 mm.
17. The golf club of claim 16 , wherein the striking face portion has a back surface and the intermediary sandwiched layer front surface abuts between 90% and 100% of the striking face portion back surface.
18. The golf club of claim 16 , wherein the internal support layer further comprises a horizontal support section extending from a heel section of the perimeter support portion to a toe section of the perimeter support portion.
19. The golf club of claim 18 , wherein the horizontal support section has a horizontal support width that is at least 10% greater than the perimeter width.
20. The golf club of claim 16 , wherein the internal support layer further comprises a vertical support section extending from a topline section of the perimeter support portion to a sole section of the perimeter support portion.
21. The golf club of claim 16 , wherein the support layer tensile strength is at least 10 times greater than the sandwiched face layer tensile strength.