Structural response modifying features for a golf club head

1. A golf club head comprising:

a sole having a length l s greater than about 3 inches;

a strike face coupled to the sole;

a rear portion coupled to the sole;

an inner surface;

a crown portion coupled to the strike face, the crown portion comprising a major crown portion and a minor crown portion, wherein the entire major crown portion is concave in the face-to-back direction of the club head and in the heel-to-toe direction of the club head, and all of the major crown portion is displaced downward relative to corresponding adjacent portions of the minor crown portion; and a first structural response modifying feature coupled to the major crown portion, the first structural response modifying feature comprising:

a constraining member comprising a first dimension h constraining , measured substantially orthogonal to the inner surface of the golf club head, having a maximum value, and

a cantilever member coupled to the constraining member, the cantilever member comprising a concave top contour and a second dimension h cantilever , measured substantially orthogonal to the inner surface of the golf club head, having a maximum value, wherein the maximum value of the first dimension h constraining substantially exceeds the maximum value of the second dimension h cantilever .

2. The golf club head of claim 1 , wherein the constraining member comprises at least one cut-out therein.

3. The golf club head of claim 1 , wherein the constraining member is coupled to at least the sole.

4. The golf club head of claim 3 , wherein the constraining member is coupled to the rear portion.

5. The golf club head of claim 1 , wherein the length l s , is greater than about 3.5 inches.

6. The golf club head of claim 1 , wherein the length l s is greater than about 3.75 inches.

7. The golf club head of claim 1 , wherein the constraining member comprises a length l sc between about 10% and about 40% of the length l s .

8. The golf club head of claim 1 further comprising a second structural response modifying feature coupled to the crown.

9. The golf club head of claim 8 , wherein the second structural response modifying feature is substantially parallel to the first structural response modifying feature.

10. The golf club head of claim 9 , wherein the first structural response modifying feature and the second structural response modifying feature are substantially perpendicular to the strike face.

11. The golf club head of claim 8 , wherein the second structural response modifying feature is coupled to the major crown portion.

12. The golf club head of claim 1 having a volume between about 300 cm 3 and about 500 cm 3 .

13. A golf club head comprising:

a strike face;

a crown coupled to the strike face, the crown portion comprising a major crown portion and a minor crown portion, wherein the entire major crown portion is concave in the face-to-back direction of the club head and in the heel-to-toe direction of the club head, and all of the major crown portion is displaced downward relative to corresponding adjacent portions of the minor crown portion;

a sole coupled to the strike face, the sole having a l s greater than 3 inches;

an inner surface; and

a first structural response modifying feature dissociated from the strike face and coupled to the major crown portion and the sole, the first structural response modifying feature comprising:

a constraining member comprising a first dimension h constraining , measured substantially orthogonal to the inner surface of the golf club head, having a maximum value and

a cantilever member coupled to the constraining member, the cantilever member comprising a concave top contour and a second dimension h cantilever , measured substantially orthogonal to the inner surface of the golf club head, having a maximum value, wherein the maximum value of the first dimension h constraining substantially exceeds the maximum value of the second dimension h cantilever .

14. The golf club head of claim 13 , wherein the constraining member comprises a length l sc between about 10% and about 40% the length l s .

15. The golf club head of claim 13 , wherein the length l s is greater than about 3.5 inches.

16. The golf club head of claim 13 , wherein the length l s is greater than about 3.75 inches.

17. The golf club head of claim 13 further comprising a second structural response modifying feature dissociated from the strike face and coupled to the crown.

18. The golf club head of claim 17 , wherein the second structural response modifying feature is substantially parallel to the first structural response modifying feature.

19. The golf club head of claim 17 , wherein the second structural response modifying feature is coupled to the major crown portion.

20. The golf club head of claim 13 having a volume between about 300 cm 3 and about 500 cm 3 .

21. A golf club head comprising:

a strike face;

a crown coupled to the strike face, the crown portion comprising a major crown portion and a minor crown portion, wherein the entire major crown portion is concave in the face-to-back direction of the club head and in the heel-to-toe direction of the club head, and all of the major crown portion is displaced downward relative to corresponding adjacent portions of the minor crown portion;

a sole coupled to the strike face, the sole having a length l s greater than about 3 inches;

an inner surface; and

a first structural response modifying feature coupled to the major crown portion, the first structural response modifying feature comprising:

a constraining member comprising a first dimension h constraining , measured substantially orthogonal to the inner surface of the golf club head, having a maximum value and

a cantilever member coupled to the constraining member, the constraining member comprising a concave top contour and a second dimension h cantilever , measured substantially orthogonal to the inner surface of the golf club head, having a maximum value, wherein the maximum value of the first dimension h constraining substantially exceeds the maximum value of the second dimension h cantilever ; and

a second structural response modifying feature coupled to the crown.

22. The golf club head of claim 21 , wherein the length l s is greater than about 3.5 inches.

23. The golf club head of claim 21 , wherein the length l s is greater than about 3.75 inches.

24. The golf club head of claim 21 , wherein the constraining member comprises a length l sc that is between about 10% and about 40% of the length l s .

25. The golf club head of claim 21 , wherein the second structural response modifying feature is substantially parallel to the first structural response modifying feature.

26. The golf club head of claim 25 , wherein the first structural response modifying feature and the second structural response modifying feature are substantially perpendicular to the strike face.

27. The golf club head of claim 21 , wherein, the second structural response modifying feature is coupled to the major crown portion.

28. The golf club head of claim 21 , wherein the constraining member comprises at least one cut-out therein.

29. The golf club head of claim 21 having a volume between about 300 cm 3 and about 500 cm 3 .

30. A golf club head comprising:

a mass of between about 190 g and about 215 g;

a sole having a longitudinal sole length of at least about 3.75 inches;

a strike face coupled to the sole, the strike face comprising an insert having a variable thickness;

a rear portion spaced longitudinally behind the strike face;

a crown portion coupled to the strike face, the crown portion comprising a contoured region having a concave longitudinal cross-section;

a first structural response modifying element at least partially coupled to the sole portion, the rear portion, and the contoured region of the crown portion, the first structural response modifying element comprising a first sole contact length between about 10% and about 40% of the sole length;

a second structural response modifying element at least partially coupled to the sole portion, the rear portion, and the contoured region of the crown portion, the second structural response modifying element comprising a second sole contact length between about 10% and about 40% of the sole length; and

a third structural response modifying element at least partially coupled to the sole portion, the rear portion, and the contoured region of the crown portion, the third structural response modifying element comprising a third sole contact length between about 10% and about 40% of the sole length;

wherein at least one of the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element is oriented substantially perpendicular to the strike face.

31. The golf club head of claim 30 , wherein at least one of the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element is entirely within the rear third of the golf club head.

32. The golf club head of claim 30 , wherein the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element are entirely within the rear half of the golf club head.

33. The golf club head of claim 32 further comprising a cast body.

34. The golf club head of claim 33 , wherein the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element are integrally cast with the club head.

35. The golf club head of claim 34 , wherein the first sole contact length, the second sole contact length, and the third sole contact length are each less than about 35% of the sole length.

36. The golf club head of claim 34 , wherein at least one of the first sole contact length, the second sole contact length, and the third sole contact length is less than about 35% of the sole length.

37. The golf club head of claim 30 having a volume between about 300 cm 3 and about 500 cm 3 .

38. A golf club head comprising:

a mass of between about 190 g and about 215 g;

a sole having a longitudinal sole length of at least about 3.75 inches;

a strike face coupled to the sole, the strike face comprising an insert having a variable thickness;

a rear portion spaced longitudinally behind the strike face;

a crown portion coupled to the strike face, the crown portion comprising a contoured region having a concave longitudinal cross-section;

a first structural response modifying element at least partially coupled to the sole portion, the rear portion, and the contoured region of the crown portion;

a second structural response modifying element at least partially coupled to the sole portion, the rear portion, and the contoured region of the crown portion; and

a third structural response modifying element at least partially coupled to the sole portion, the rear portion, and the contoured region of the crown portion;

wherein at least one of the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element is oriented substantially perpendicular to the strike face and at least two of the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element are not oriented parallel to one another.

39. The golf club head of claim 38 , wherein at least one of the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element is entirely within the rear third of the golf club head.

40. The golf club head of claim 38 , wherein the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element are entirely within the rear half of the golf club head.

41. The golf club head of claim 40 further comprising a cast body.

42. The golf club head of claim 41 , wherein the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element are integrally cast with the club head.

43. The golf club head of claim 38 having a volume between about 300 cm 3 and about 500 cm 3 .

44. A golf club head comprising:

a mass of between about 190 g and about 215 g;

a sole having a longitudinal sole length of at least about 3.75inches;

a strike face coupled to the sole, the strike face comprising an insert having a variable thickness;

a rear portion spaced longitudinally behind the strike face;

a crown portion coupled to the strike face;

a first structural response modifying element at least partially coupled to the sole portion, the rear portion, and the crown portion, the first structural response modifying element comprising a first sole contact length between about 10% and about 40% of the sole length;

a second structural response modifying element at least partially coupled to the sole portion, the rear portion, and the crown portion, the second structural response modifying element comprising a second sole contact length between about 10% and about 40% of the sole length; and

a third structural response modifying element at least partially coupled to the sole portion, the rear portion, and the crown portion, the third structural response modifying element comprising a third sole contact length between about 10% and about 40% of the sole length;

wherein at least one of the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element is oriented substantially perpendicular to the strike face.

45. The golf club head of claim 44 , wherein at least one of the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element is entirely within the rear third of the golf club head.

46. The golf club head of claim 44 , wherein the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element are entirely within the rear half of the golf club head.

47. The golf club head of claim 46 further comprising a cast body.

48. The golf club head of claim 47 , wherein the first structural response modifying element, the second structural response modifying element, and the third structural response modifying element are integrally cast with the club head.

49. The golf club head of claim 48 , wherein the first sole contact length, the second sole contact length, and the third sole contact length are each less than about 35% of the sole length.

50. The golf club head of claim 48 , wherein at least one of the first sole contact length, the second sole contact length, and the third sole contact length is less than about 35% of the sole length.

51. The golf club head of claim 44 having a volume between about 300 cm 3 and about 500 cm 3 .