GOLF CLUB HEAD WITH CHAMFER AND RELATED METHODS

• US 20180056150A1
• Filed: 11/06/2017
• Published: 03/01/2018
• Est. Priority Date: 01/23/2015
• Status: Active Grant

• Current Assignee: Karsten Manufacturing Corporation
• Original Assignee: Karsten Manufacturing Corporation
• Inventors: Jertson, Martin R., Morales, Eric J., Stokke, Ryan M.
• Granted Patent: US 11,083,935 B2
• Time in Patent Office: Days
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0466 wood-type

Abstract

Some embodiments include a golf club head having a hollow body comprising a front portion having a strikeface, a heel region, a toe region opposite the heel region, a sole, a back, a crown portion, and a chamfer extending between the front portion and the crown portion, the chamfer having an inner surface and an outer surface, wherein the chamfer defines a hinge point of the crown portion.

Claims

1. A golf club head comprising:

a hollow body comprising

a front portion having a strikeface;

a heel portion;

a toe portion opposite the heel portion;

a sole portion;

a rear portion;

a crown portion; and

an internal radius transition from the strikeface to the sole portion comprising;

a first tier directly adjacent to the strikeface;

a second tier directly adjacent to the first tier;

a third tier directly adjacent to the second tier;

a first tier transition region between the first tier and the second tier;

a second tier transition region between the second tier and the third tier; and

a third tier transition region adjacent the third tier;

wherein;

the first tier comprises a first substantially constant thickness;

the second tier comprises a second substantially constant thickness smaller than the first substantially constant thickness;

the third tier comprises a third substantially constant thickness smaller than the first substantially constant thickness and the second substantially constant thickness;

the first, second, and third tier transition regions have a slope to transition from adjacent tiers, wherein the first, second, and third tier transition regions are linearly sloped at an angle less than 90 degrees; and

the internal radius transition is not visible from an exterior of the golf club head.

2. The golf club head of claim 1 further comprising a chamfer extending between the front portion, and the crown portion, wherein the chamfer defines a hinge point of the crown portion.

3. The golf club head of claim 2, wherein the golf club head is a driver, the chamfer having:

a width of between approximately 0.75 inches and approximately 4.50 inches;

a length of between approximately 0.15 inches and approximately 0.25 inches; and

a maximum thickness of between approximately 0.095 inches and approximately 0.150 inches, wherein the maximum thickness is measured between an inner surface and an outer surface of the chamfer.

4. The golf club head of claim 2, wherein the golf club head is a fairway wood, the chamfer having:

a width of between approximately 0.75 inches and approximately 3.50 inches;

a length of between approximately 0.05 inches and approximately 0.25 inches;

a maximum thickness of between approximately 0.025 inches and approximately 0.070 inches, wherein the maximum thickness is measured between an inner surface and an outer surface of the chamfer.

5. The golf club head of claim 3, wherein a ratio of the maximum thickness of the chamfer to a maximum thickness of the crown portion adjacent the chamfer is between approximately 1.15 to 3.00.

6. The golf club head of claim 4, wherein a ratio of the maximum thickness of the chamfer to a maximum thickness of the crown portion adjacent the chamfer is between approximately 1.15 to 4.00.

7. The golf club head of claim 3, wherein the maximum thickness of the chamfer is constant along the entire width of the chamfer.

8. The golf club head of claim 1 further comprising a plurality of turbulators positioned above the crown portion.

9. The golf club head of claim 2, wherein the chamfer moves the hinge point between the front portion and the crown portion more toward the rear portion, such that the hinge point is distanced from a loft plane by approximately 0.18 inch.

10. The golf club head of claim 1, wherein the strikeface has a surface roughness between 110 R_a and 190 R_a.

11. A golf club comprising:

a hollow-bodied head comprising;

a front portion having a strikeface;

a heel portion;

a toe portion opposite the heel portion;

a sole portion;

a rear portion;

a crown portion;

a shaft coupled to the hollow-bodied head; and

an internal radius transition from the strikeface to the sole portion comprising;

a first tier directly adjacent to the strikeface;

a second tier directly adjacent to the first tier;

a third tier directly adjacent to the second tier;

a first tier transition region between the first tier and the second tier;

a second tier transition region between the second tier and the third tier; and

a third tier transition region adjacent the third tier;

wherein;

the first tier comprises a first slope such that a thickness of the first tier is greater closer to the strikeface, and thinner closer to the first tier transition region;

the second tier comprises a second slope close to zero such that a thickness of the second tier is approximately constant;

the third tier comprises a third slope such that a thickness of the third tier is greater closer to the second tier transition region, and thinner closer to third transition region; and

the internal radius transition is not visible from an exterior of the golf club head.

12. The golf club of claim 11, wherein the first, second, and third tier transition regions have a slope to transition from adjacent tiers, wherein the first, second, and third tier transition regions are linearly sloped at an angle less than 90 degrees.

13. The golf club of claim 11, wherein the first, second, and third tier transition regions comprise an approximately 90 degree step from adjacent tiers.

14. The golf club of claim 11 further comprising a chamfer extending between the front portion, and the crown portion, wherein the chamfer defines a hinge point of the crown portion.

15. The golf club of claim 14, wherein the golf club is a driver, and the chamfer has:

a width of between approximately 0.75 inches and approximately 4.50 inches;

a length of between approximately 0.15 inches and approximately 0.25 inches; and

a maximum thickness of between approximately 0.095 inches and approximately 0.150 inches, wherein the maximum thickness is measured between the inner surface and the outer surface of the chamfer.

16. The golf club of claim 14, wherein the golf club is a fairway wood, and the chamfer has:

a width of between approximately 0.75 inches and approximately 3.50 inches;

a length of between approximately 0.05 inches and approximately 0.25 inches;

a maximum thickness of between approximately 0.025 inches and approximately 0.070 inches, wherein the maximum thickness is measured between the inner surface and the outer surface of the chamfer.

17. The golf club of claim 15, wherein a ratio of the maximum thickness to a thickness of the crown measured adjacent to the chamfer is between approximately 1.15 and 3.00.

18. The golf club of claim 16, wherein a ratio of the maximum thickness to a thickness of the crown measured adjacent to the chamfer is between approximately 1.15 and 4.00.

19. The golf club of claim 14 wherein the strikeface defines a loft plane and the hinge point is spaced apart from the loft plane by a minimum of 0.16 inches in a perpendicular direction.

20. The golf club of claim 14, wherein the chamfer defines a plane tangent to the inner surface of the chamfer, and the angle between the chamfer plane and the loft plane is approximately 45°

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