GOLF CLUB HEADS

• US 20110151989A1
• Filed: 12/22/2009
• Published: 06/23/2011
• Est. Priority Date: 12/22/2009
• Status: Active Grant

• Current Assignee: Cobra Golf Company (Puma SE)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Golden, Charles E., Roberts, Douglas E.
• Granted Patent: US 8,641,550 B2
• Time in Patent Office: Days
• US Class Current: 473/290
• CPC Class Codes: A63B 53/005 Club sets
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0412 Volume
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0466 wood-type

Abstract

A plurality of golf club heads wherein the difference in spin is minimized is disclosed herein. More specifically, the present invention discloses a plurality of fairway wood type golf club head with a volume of between about 110 cubic centimeters (cc) and about 250 cc, wherein the change in backspin between any two clubs within the plurality of metal wood type golf club heads is less than about 600 revolutions per minute (rpm). A plurality of golf clubs in accordance with the present invention may generally have all of its clubs maintain a center of gravity (CG) location that is less than about 8.0 mm away from a neutral axis of the golf club head regardless of the difference in loft of the specific golf club head within the plurality of golf club heads.

Claims

1. A plurality of golf club heads comprising:

a first golf club head comprising;

a first striking face located at a front portion of said first golf club head,

wherein said first striking face has a first loft angle of greater than about 14 degrees and less than about 24 degrees; and

wherein said first striking face has a first face center defining a first neutral axis normal to said first striking face passing through said first face center, and

a first center of gravity located at a first CG location distance away from said first neutral axis, and

a second golf club head comprising;

a second striking face located at a front portion of said second golf club head,

wherein said second striking face has a second loft angle of greater than about 14 degrees and less than about 24 degrees; and

wherein said second striking face has a second face center defining a second neutral axis normal to said second striking face passing through said second face center, and

a second center of gravity located at a second CG location distance away from said second neutral axis,

wherein said first golf club head and said second golf club head both have a volume of greater than about 110 cc and less than about 250 cc, and

wherein a difference between said first CG location distance and said second CG location distance is less than about 1.00 mm.

2. The plurality of golf club heads of claim 1, wherein said difference between said first CG location distance and said second CG location distance is less than about 1.0 mm.

3. The plurality of golf club heads of claim 2, wherein said difference between said first CG location distance and said second CG location distance is less than about 0.75 mm.

4. The plurality of golf club heads of claim 1, wherein a difference in a volume to CG location distance ratio between said first golf club head and said second golf club head is less than about 50 cm²;

wherein said volume to CG location distance ratio is defined as said volume of said golf club head divided by said center of gravity location measured away from said neutral axis.

5. The plurality of golf club heads of claim 4, wherein said difference in said volume to CG location distance ratio between said first golf club head and said second golf club head is less than about 48 cm².

6. The plurality of golf club heads of claim 5, wherein said difference in said volume to CG location distance ratio between said first golf club head and said second golf club head is less than about 46 cm².

7. The plurality of golf club heads of claim 4, wherein said first loft angle is greater than said second loft angle, and

wherein a first spin to loft ratio of said first golf club head is less than a second spin to loft ratio of said second golf club head;

wherein said spin to loft ratio is defined as a backspin of a golf ball after being impacted by said golf club head divided by said loft angle of said golf club head.

8. The plurality of golf club heads of claim 7, wherein said backspin is generated by swinging said golf club head at a velocity of between about 80 mph to about 85 mph with an attack angle of between about −

2 degrees to about 2 degrees.

9. A golf club head comprising:

a striking face located at a front portion of said golf club head,

wherein said striking face has a loft angle of greater than about 14 degrees and less than about 24 degrees; and

wherein said striking face has a face center defining a neutral axis normal to said striking face passing through said face center, and

a center of gravity located at a CG location distance away from said first neutral axis,

wherein said golf club head has a volume of greater than about 110 cc and less than about 250 cc; and

wherein said CG location distance is less than about 8.0 mm.

10. The golf club head of claim 9, wherein a spin to loft ratio of said golf club head decreases as said loft of said golf club head increases;

wherein said spin to loft ratio is defined as a backspin of a golf ball after being impacted by said golf club head divided by said loft angle of said golf club head.

11. The golf club head of claim 10, wherein said backspin is generated by swinging said golf club at a velocity of between about 80 mph to about 85 mph with an attack angle of between about −

2 degrees to and 2 degrees.

12. The golf club head of claim 11, wherein said spin is about 3600 rpm when said loft of said golf club head is about 16 degrees.

13. The golf club head of claim 12, wherein said spin rate is about 3900 rpm when said loft of said golf club head is about 18 degrees.

14. The golf club head of claim 13, wherein said spin rate is about 4200 rpm when said loft of said golf club head is about 20 degrees.

15. A plurality of golf club heads comprising:

a first golf club head comprising;

a first striking face located at a front portion of said first golf club head,

wherein said first striking face has a first loft angle of greater than about 14 degrees and less than about 24 degrees; and

wherein said first striking face has a first face center defining a first neutral axis normal to said first striking face passing through said first face center, and

a first center of gravity located at a first CG location distance away from said first neutral axis, and

a second golf club head comprising;

a second striking face located at a front portion of said second golf club head,

wherein said second striking face has a second loft angle of greater than about 14 degrees and less than about 24 degrees; and

wherein said second striking face has a second face center defining a second neutral axis normal to said second striking face passing through said second face center, and

a second center of gravity located at a second CG location distance away from said second neutral axis,

wherein said first golf club head and said second golf club head both have a volume of greater than about 110 cc and less than about 250 cc;

wherein a difference in a volume to CG location distance ratio between said first golf club head and said second golf club head is less than about 50 cm²; and

wherein said volume to CG location distance ratio is defined as said volume of said golf club head divided by said center of gravity location measured away from said neutral axis.

16. The plurality of golf club heads of claim 15, wherein said difference in said volume to CG location distance ratio between said first golf club head and said second golf club head is less than about 48 cm².

17. The plurality of golf club heads of claim 16, wherein said difference in said volume to CG location distance ratio between said first golf club head and said second golf club head is less than about 46 cm².

18. The plurality of golf club heads of claim 15, wherein said first loft angle is greater than said second loft angle, and

wherein a first spin to loft ratio of said first golf club head is less than a second spin to loft ratio of said second golf club head;

wherein said spin to loft ratio is defined as a backspin of a golf ball after being impacted by said golf club head divided by said loft angle of said golf club head.

19. The plurality of golf club heads of claim 18, wherein said backspin is generated by swinging said golf club head at a velocity of between about 80 mph to about 85 mph with an attack angle of between about −

2 degrees to about 2 degrees.