Golf Club Head

• US 20060148588A1
• Filed: 09/07/2005
• Published: 07/06/2006
• Est. Priority Date: 01/03/2005
• Status: Active Grant

• Current Assignee: Callaway Golf Company
• Original Assignee: Callaway Golf Company
• Inventors: Hettinger, Ronald K., Gibbs, Evan D., Williams, Luke R.
• Granted Patent: US 7,163,468 B2
• Time in Patent Office: Days
• US Class Current: 473/345
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• 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 53/0408 characterised by specific dimensions, e.g. thickness
• 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 53/0458 with non-uniform 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

Abstract

A golf club head (42) having a standard deviation of coefficient of restitution of less than 0.226 is disclosed herein. The golf club head (42) also preferably has a delta of the coefficient of restitution between a geometric face center of the face (72) and a location (806) 0.5 inch sole-ward from the face center that is less than 0.065. The golf club head (42) preferably has a volume ranging from 420 cubic centimeters to 470 cubic centimeters. The golf club head (42) preferably has a moment of inertia about the Izz axis through the center of gravity of the golf club head greater than 4000 grams-centimeters squared, and a moment of inertia about the Ixx axis through the center of gravity of the golf club head greater than 3000 grams-centimeters squared.

Claims

1. A golf club head comprising:

a body having a face wall, a crown wall, a sole wall, a heel wall, a rear wall, and a toe wall;

wherein the golf club head has a volume ranging from 350 cubic centimeters to 500 cubic centimeters and a mass ranging from 190 grams to 250 grams;

wherein the golf club head has a standard deviation of coefficient of restitution of less than 0.226.

2. The golf club head according to claim 1 wherein the volume of the golf club head ranges from 420 cubic centimeters to 470 cubic centimeters.

3. The golf club head according to claim 1 further comprising a plurality of weight members disposed on at least one of the sole wall, the heel wall, the rear wall, and the toe wall, each of the plurality of weight members having a mass ranging from five grams to thirty grams.

4. The golf club head according to claim 1 wherein the golf club head has a standard deviation of coefficient of restitution ranging from 0.225 to 0.150.

5. The golf club head according to claim 1 wherein the golf club head has a standard deviation of coefficient of restitution of less than 0.180.

6. The golf club head according to claim 1 wherein a moment of inertia about the Izz axis through the center of gravity of the golf club head is greater than 4000 grams-centimeters squared, and a moment of inertia about the Ixx axis through the center of gravity of the golf club head is greater than 3000 grams-centimeters squared.

7. The golf club head according to claim 1 wherein the golf club head has a standard deviation of coefficient of restitution of less than 0.165.

8. The golf club head according to claim 1 wherein the golf club head has a standard deviation of coefficient of restitution of less than 0.226 at a plurality of hit locations across the face wall.

9. The golf club head according to claim 8 wherein the plurality of hit locations is at least nine locations.

10. The golf club head according to claim 8 wherein the plurality of hit locations comprises:

a face center of the face wall, a location 0.25 inch heel-ward from the face center, a location 0.5 inch heel-ward from the face center, a location 0.25 inch toe-ward from the face center, a location 0.5 inch toe-ward from the face center, a location 0.25 inch crown-ward from the face center, a location 0.5 inch crown-ward from the face center, a location 0.25 inch sole-ward from the face center, and a location 0.5 inch sole-ward from the face center.

11. The golf club head according to claim 1 wherein the golf club head has a delta of the coefficient of restitution between a geometric face center of the face wall and a location 0.5 inch sole-ward from the face center is less than 0.065.

12. The golf club head according to claim 1 wherein the golf club head has a delta of the coefficient of restitution between a geometric face center of the face wall and a location 0.5 inch sole-ward from the face center is less than 0.050.

13. The golf club head according to claim 1 wherein the golf club head has a delta of the coefficient of restitution between a geometric face center of the face wall and a location 0.5 inch sole-ward from the face center ranging from 0.068 to 0.040.

14. A golf club head comprising:

a face component composed of a first material, the face component comprising a striking plate portion and a return portion; and

an aft-body coupled to the return portion of the face component, the aft-body composed of a second material having a density less than that of the first material, the aft-body comprising a crown portion, a sole portion, the sole portion having a bottom section and a ribbon section, the ribbon section being located between the crown portion and the bottom section of the sole portion;

wherein the golf club head has a volume ranging from 350 cubic centimeters to 500 cubic centimeters and a mass ranging from 190 grams to 250 grams;

wherein the golf club head has a standard deviation of coefficient of restitution of less than 0.226.

15. The golf club head according to claim 14 wherein the golf club head has a standard deviation of coefficient of restitution ranging from 0.225 to 0.150.

16. The golf club head according to claim 14 wherein the golf club head has a standard deviation of coefficient of restitution of less than 0.180.

17. The golf club head according to claim 14 wherein the golf club head has a standard deviation of coefficient of restitution of less than 0.226 at a plurality of hit locations across the face wall, and the golf club head has a coefficient of restitution greater than 0.825.

18. The golf club head according to claim 17 wherein the plurality of hit locations comprises:

a face center of the face wall, a location 0.25 inch heel-ward from the face center, a location 0.5 inch heel-ward from the face center, a location 0.25 inch toe-ward from the face center, a location 0.5 inch toe-ward from the face center, a location 0.25 inch crown-ward from the face center, a location 0.5 inch crown-ward from the face center, a location 0.25 inch sole-ward from the face center, and a location 0.5 inch sole-ward from the face center.

19. The golf club head according to claim 14 wherein the golf club head has a delta of the coefficient of restitution between a geometric face center of the face wall and a location 0.5 inch sole-ward from the face center is less than 0.065.

20. A golf club head comprising:

a body having a face wall, a crown wall, a sole wall, a heel wall, a rear wall, and a toe wall;

wherein the golf club head has a volume ranging from 350 cubic centimeters to 500 cubic centimeters and a mass ranging from 190 grams to 250 grams;

wherein the golf club head has a delta of the coefficient of restitution between a geometric face center of the face wall and a location 0.5 inch sole-ward from the face center is less than 0.065.