Golf Club Head with Customizable Center of Gravity

• US 20030153401A1
• Filed: 04/15/2003
• Published: 08/14/2003
• Est. Priority Date: 11/01/1999
• Status: Active Grant

• Current Assignee: Callaway Golf Company (Topgolf Callaway Brands Corp.)
• Original Assignee: Callaway Golf Company (Topgolf Callaway Brands Corp.)
• Inventors: Rollinsoin, Augustin W., Galloway, J. Andrew, Cackett, Matthew T., Hocknell, Alan, Helmstetter, Richard C.
• Granted Patent: US 6,739,983 B2
• Time in Patent Office: Days
• US Class Current: 473/342
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 2209/02 with reinforcing fibres, e.g. carbon, polyamide fibres
• CPC Class Codes: A63B 2209/023 Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
• CPC Class Codes: A63B 53/02 Joint structures between the head and the shaft
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0412 Volume
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0441 with visual indicators for aligning the golf club
• CPC Class Codes: A63B 53/0458 with non-uniform thickness of the impact face plate
• CPC Class Codes: A63B 53/0462 characterised by tapering thickness of the impact face plate
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence
• CPC Class Codes: B21J 5/00 Methods for forging, hammering, or pressing for working sheet-metal or metal tubes, rods, or profiles B21D; for working wire B21F; Special equipment or accessories therefor
• CPC Class Codes: B21K 17/00 Making sport articles, e.g. skates
• CPC Class Codes: C22F 1/183 of titanium or alloys based thereon
• CPC Class Codes: C23F 1/00 Etching metallic material by chemical means manufacture of printing surfaces B41C; manufacture of printed circuits H05K
• CPC Class Codes: C23F 1/26 : for etching refractory metals

Abstract

A golf club (40) having a club head (42) with a face component (60) and an interchangeable aft body (61) is disclosed herein. The face component (60) has a striking plate portion (72) and a return portion (74). The aft-body (61), which is attached to the return portion (74) of the face component (60), is selected from a plurality of aft-bodies, each having a different center of gravity location. Each of the aft-bodies (61) is composed of a crown portion (62), a sole portion (64), and at least one weight member (122) for adjusting location of the center of gravity. An aft-body (61) is selected from the plurality of aft-bodies (61) based on its center of gravity location, so as to provide the club head (40) with a center of gravity location suited to a particular golfer.

Claims

1. A method for providing a golfer with a golf club head having a center of gravity location suited for the golfer, the method comprising:

determining a desired golf club head center of gravity location for the golfer;

selecting an aft-body from a plurality of aft-bodies, at least two of the plurality of aft-bodies having a different center of gravity location; and

connecting the selected aft-body to a face component to create the golf club head, the selected aft-body providing the golf club head with a center of gravity location that corresponds to the desired golf club head center of gravity location.

2. The method according to claim 1 wherein each of the plurality of aft-bodies is composed of plies of pre-preg material.

3. The method according to claim 1 wherein each of the plurality of aft-bodies is composed of a thermoplastic material.

4. The method according to claim 1 wherein each of the plurality of aft-bodies is composed of low-density metal material.

5. The method according to claim 1 wherein the plurality of aft-bodies comprises at least three aft-bodies with three different center of gravity locations.

6. The method according to claim 1 wherein the plurality of aft-bodies comprises at least nine aft-bodies with nine different center of gravity locations.

7. The method according to claim 1 wherein the plurality of aft-bodies comprises at least twenty-seven aft-bodies with twenty-seven different center of gravity locations.

8. The method according to claim 1 wherein the plurality of aft-bodies comprises an aft-body with a heel bias center of gravity location, an aft-body with a toe bias center of gravity location and an aft-body with a neutral bias center of gravity location.

9. The method according to claim 1 wherein the plurality of aft-bodies comprises an aft-body with a rearward-bias center of gravity location, an aft-body with a forward bias center of gravity location and an aft-body with a neutral bias center of gravity location.

10. The method according to claim 1 wherein

the face component is composed of a metal material, the face component having a striking plate portion and a return portion with a sole extension, the striking plate portion having a thickness ranging from 0.010 inch to 0.250 inch and the return portion having a thickness ranging from 0.010 inch to 0.250 inch, the return portion extending a distance ranging from 0.25 inch to 1.5 inches from a perimeter of the striking plate portion, and the sole extension extending 0.05 inch to 3.0 inches from an edge of the return portion;

and

each aft-body of the plurality of aft-bodies is composed of a composite material, each aft body having a crown portion, a sole portion and a ribbon section, wherein an aft-body is attached to the return portion of the face component;

wherein the golf club head has a coefficient of restitution of 0.80 to 0.94.

11. The method according to claim 10 wherein the striking plate portion has a thickness in the range of 0.055 inch to 0.125 inch.

12. The method according to claim 10 wherein the striking plate portion has a thickness in the range of 0.060 inch to 0.111 inch.

13. The method according to claim 10 wherein the striking plate portion has concentric regions of varying thickness with the thickest region in about the center.

14. The method according to claim 1 wherein the golf club head has a volume ranging from 290 cubic centimeters to 600 cubic centimeters.

15. The method according to claim 1 wherein the moment of inertia about the Izz axis of the golf club head is greater than 3000 grams-centimeter squared.

16. The method according to claim 1 wherein the face component is composed of a metal material selected from the group consisting of titanium alloy, amorphous metal, stainless steel and maraging steel.

17. A method for providing a golfer with a golf club head having a center of gravity location suited for the golfer, the method comprising:

analyzing the golfer'"'"'s swing;

determining a desired golf club head center of gravity location for the golfer based on the analysis of the golfer'"'"'s swing;

selecting an aft-body from a plurality of aft-bodies, at least two of the plurality of aft-bodies having a different center of gravity location; and

connecting the selected aft-body to a face component to create the golf club head, the selected aft-body providing the golf club head with a center of gravity location that corresponds to the desired golf club head center of gravity location.

18. The method according to claim 17 further comprising determining a loft angle for the golf club head and providing a face component having such a loft angle.

19. The method according to claim 17 wherein determining the desired center of gravity location comprises determining if the center of gravity should be preferably heel bias, neutral bias or toe bias.

20. The method according to claim 17 wherein determining the desired golf club head center of gravity location comprises determining if the center of gravity should be high heel bias, low heel bias, high neutral bias, low neutral bias, high toe bias or low toe bias.

21. The method according to claim 17 wherein determining the desired golf club head center of gravity location for the golfer comprises determining if the center of gravity should be rear high heel bias, rear low heel bias, rear high neutral bias, rear low neutral bias, rear high toe bias, rear low toe bias, forward high heel bias, forward low heel bias, forward high neutral bias, forward low neutral bias, forward high toe bias or forward low toe bias.

22. The method according to claim 17 wherein the plurality of aft-bodies comprises three aft-bodies, each aft-body including a weight member having a mass ranging from 40 grams to 60 grams, and the weight member of each aft-body positioned a distance of at least 0.20 inch from the weight member position in the other aft-bodies.

23. A golf club head comprising:

a face component; and

an aft-body attached to the face component, the aft-body selected from a plurality of aft-bodies, each of the aft-bodies including at least one weight member and having a center of gravity location different from the other aft-bodies.

24. The golf club head according to claim 23 wherein each of the plurality of aft-bodies is composed of plies of pre-preg material.

25. The golf club head according to claim 23 wherein the face component is composed of a metal material, the face component including a striking plate portion and a return portion, the striking plate portion having a thickness ranging from 0.010 inch to 0.250 inch and the return portion having a thickness ranging from 0.010 inch to 0.250 inch, the return portion extending a distance ranging from 0.25 inch to 1.5 inches from a perimeter of the striking plate portion, and wherein the aft-body is attached to the return portion of the face component.

26. The golf club head according to claim 25 wherein each of the aft-bodies is composed of a composite material and includes a crown portion and a sole portion.

27. The golf club head according to claim 25 wherein each of the aft-bodies includes a crown portion, a sole portion, and a ribbon section located between the crown and sole portions, and wherein at least one weight member is located in the ribbon section.

28. The golf club head according to claim 27 wherein the ribbon section is substantially vertical.

29. The golf club head according to claim 25 wherein the golf club head has a moment of inertia, Izz, greater than 3000 g-cm² and a moment of inertia, Iyy, greater than 2000 g-cm², wherein the moments of inertia are defined by the vertical axis Z through the center of gravity of the golf club head, a horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate portion, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis are orthogonal to each other.

30. The golf club head according to claim 25 wherein the striking plate portion has concentric regions of varying thickness with the thickest region in about the center.

31. A golf club having a club head center of gravity location suited for a particular golfer, the golf club comprising:

a golf club head including a face component and an aft-body attached to the face component, the aft-body selected from a plurality of aft-bodies, each of the aft-bodies including at least one weight member and having a center of gravity location different from the other aft-bodies, the golf club head having a desired center of gravity location for the golfer; and

a shaft attached to the golf club head.

32. The golf club according to claim 31 wherein the aft-body attached to the face component results in a golf club having a heel bias center of gravity location.

33. The golf club according to claim 31 wherein the aft-body attached to the face component results in a golf club having a neutral bias center of gravity location.

34. The golf club according to claim 31 wherein the aft-body attached to the face component results in a golf club having a toe bias center of gravity location.

35. The golf club according to claim 31 wherein the face component is composed of a metal material and includes a striking plate portion and a substantially vertical return portion, the striking plate portion having a thickness ranging from 0.010 inch to 0.250 inch and the return portion having a thickness ranging from 0.010 inch to 0.250 inch, the return portion extending a distance ranging from 0.25 inch to 1.5 inches from a perimeter of the striking plate portion, and wherein the aft-body is attached to the return portion of the face component.

36. The golf club according to claim 35 wherein each of the aft-bodies is composed of a composite material and includes a crown portion, a sole portion, and a ribbon section located between the crown and sole portions, and wherein at least one weight member is located in the ribbon section.

37. The golf club according to claim 35 wherein the striking plate portion has concentric regions of varying thickness with the thickest region in about the center.

38. The golf club according to claim 31 wherein the golf club head has a volume in the range of 290 cubic centimeters to 600 cubic centimeters and a moment of inertia about the Izz axis of greater than 3000 grams-centimeter squared.

39. The golf club head according to claim 31 wherein the golf club head has a moment of inertia, Izz, greater than 3000 g-cm² and a moment of inertia, Iyy, greater than 2000 g-cm², wherein the moments of inertia are defined by the vertical axis Z through the center of gravity of the golf club head, a horizontal axis Y through the center of gravity of the golf club head and substantially parallel to a striking plate portion, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis are orthogonal to each other.