Golf club head with open crown and related methods

• US 10,500,449 B2
• Filed: 05/29/2018
• Issued: 12/10/2019
• Est. Priority Date: 05/15/2014
• Status: Active Grant

• Current Assignee: Karsten Manufacturing Corporation
• Original Assignee: Karsten Manufacturing Corporation
• Inventors: Henrikson, Erik M., Morales, Eric J., Stokke, Ryan M., Cole, Eric V., Bacon, Cory S.
• Primary Examiner(s): Vanderveen, Jeffrey S
• Application Number:
  US15/992,031
• Publication Number:
  US 20180272204A1
• Time in Patent Office: 560 Days
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/045 Strengthening ribs
• CPC Class Codes: A63B 53/0454 Strengthening ribs on the rear surface of the impact face plate
• CPC Class Codes: A63B 53/0458 with non-uniform thickness of the impact face plate
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/54 with means for damping vibrations
• CPC Class Codes: Y10T 29/49828 Progressively advancing of work assembly station or assembled portion of work

Abstract

Described herein is a golf club head devoid of a crown, the club head comprising: a front end having a bottom rail, a top rail, and a strikeface, the strikeface including a striking surface, a back surface, and a reinforcement element extending from the back surface of the strikeface; a rear end opposite the front end; a heel portion; a toe portion opposite the heel potion; a sole coupled to the front end along the bottom rail at a sole transition region, the sole extending toward the rear end of the golf club head and including a sole thickness, at least one weight member, and a perimeter wall extending from the front end near the heel portion to the front end near the toe portion along the rear end of the club head, wherein the perimeter wall decreases in height from the front end toward the rear end of the club head.

Claims

1. A golf club head comprising:

a front end having a bottom rail, a top rail, and a strikeface, the strikeface including;

a striking surface;

a back surface; and

a reinforcement element comprising a looped rib extending from the back surface of the strikeface, the looped rib having an outer perimeter surface and an inner perimeter surface, wherein;

the outer perimeter surface is filleted with the back surface of the strikeface; and

a largest rib span of the inner perimeter surface is 0.609 cm to 1.88 cm;

a rear end opposite the front end;

a heel portion;

a toe portion opposite the heel potion;

a sole coupled to the front end along the bottom rail at a sole transition region, the sole extending toward the rear end of the golf club head and including;

a sole thickness;

a perimeter wall extending from the front end near the heel portion to the front end near the toe portion along the rear end of the club head, wherein the perimeter wall includes a perimeter wall thickness and a perimeter wall height that decreases from the front end toward the rear end of the club head;

wherein,

the club head is devoid of a crown; and

the back surface of the strikeface and a top surface of the sole are exposed.

2. The golf club head of claim 1, wherein the club head further includes:

a length measured as a greatest distance from a front plane to the rear end of the club head in a direction parallel to a ground plane;

a height measured as a distance from the ground plane to a highest point of the front end of the club head in a direction perpendicular to the ground plane; and

a center of gravity (CG) positioned at a head CG height from the ground plane and a head CG depth from the front plane;

wherein,

the head CG height is less than 60% of the height of the club head; and

the head CG depth is greater than 25% of the length of the club head.

3. The golf club head of claim 2, wherein the club head further comprises at least one weight member, and the at least one weight member includes a first weight member, the first weight member comprising a first weight member center of gravity (CG) positioned at a first weight member CG depth, wherein the first weight member CG depth is greater than the head CG depth.

4. The golf club head of claim 3, wherein a ratio of the first weight member CG depth to the head CG depth is greater than 1.5.

5. The golf club head of claim 3, wherein the at least one weight member further includes a second weight member, the second weight member comprising a second weight member center of gravity (CG) positioned at a second weight member CG depth, wherein the second weight member CG depth is greater than the head CG depth.

6. The golf club head of claim 5, wherein a ratio of the second weight member CG depth to the head CG depth is greater than 1.5.

7. The golf club head of claim 1, wherein the sole thickness is less than 0.060 inch (0.152 cm).

8. The golf club head of claim 1, wherein the sole transition region includes a sole transition thickness less than 0.060 inch (0.152 cm).

9. The golf club head of claim 1, wherein the sole transition region includes a radius of curvature of the sole between 0.010-0.040 inch (0.0254-0.102 cm).

10. The golf club head of claim 1, wherein the perimeter wall thickness ranges from 0.020-0.060 inch (0.0508-0.152 cm).

11. The golf club head of claim 1, wherein at least one of the perimeter wall thickness or the perimeter wall height varies to form one or more recesses in the perimeter wall.

12. The golf club head of claim 11, wherein the one or more recesses are positioned along the perimeter wall between the front end and rear end of the club head.

13. The golf club head of claim 1, further comprising a lip that extends along the perimeter wall from the front end near the heel portion to the front end near the toe portion along the rear end of the club head.

14. The golf club head of claim 13, wherein the lip further comprises a lip thickness and a lip height, and at least one of the lip thickness or the lip height varies to form one or more recesses in the lip.

15. A method of manufacturing a golf club head, comprising:

forming a club head devoid of a crown, the club head having;

a front end having a bottom rail, a top rail, and a strikeface, the strikeface including;

a striking surface;

a back surface; and

a reinforcement element comprising a looped rib extending from the back surface of the strikeface, the looped rib having an outer perimeter surface and an inner perimeter surface, wherein;

the outer perimeter surface is filleted with the back surface of the strikeface; and

a largest rib span of the inner perimeter surface is 0.609 cm to 1.88 cm;

a rear end opposite the front end;

a heel portion;

a toe portion opposite the heel potion;

a sole coupled to the front end along the bottom rail at a sole transition region, the sole extending toward the rear end of the golf club head and including;

a sole thickness;

a perimeter wall extending from the front end near the heel portion to the front end near the toe portion along the rear end of the club head, wherein the perimeter wall includes a perimeter wall thickness and a perimeter wall height that decreases from the front end toward the rear end of the club head;

wherein,

the club head is devoid of a crown; and

the back surface of the strikeface and a top surface of the sole are exposed.