Aerodynamic golf club head
View Patent ↗An aerodynamic golf club head that produces reduced aerodynamic drag forces. A crown section imparts beneficial aerodynamic properties due in part to the location of a crown apex and the curvature of the crown section.
1. A high volume aerodynamic golf club head ( 100 ) comprising:
A) a hollow body ( 110 ) having a club head volume of at least 400 cc, a face ( 200 ), a sole section ( 300 ), a crown section ( 400 ), a front ( 112 ), a back ( 114 ), a heel ( 116 ), and a toe ( 118 );
B) the face ( 200 ) having a top edge ( 210 ) and a lower edge ( 220 ), wherein a top edge height (TEH) is the elevation of the top edge ( 210 ) above a ground plane (GP), and a lower edge height (LEH) is the elevation of the lower edge ( 220 ) above the ground plane (GP), wherein the greatest top edge height (TEH) is at least 2 inches; and
C) the crown section ( 400 ) having a crown apex ( 410 ) located an apex height (AH) above the ground plane (GP), wherein:
(i) an apex ratio of the apex height (AH) to the greatest top edge height (TEH) is at least 1.13; and
(ii) within a front-to-back vertical section through the crown apex ( 410 ) and perpendicular to a vertical plane created by a shaft axis (SA), a portion of the crown section ( 400 ) between the crown apex ( 410 ) and the face ( 200 ) has an apex-to-front radius of curvature (Ra-f) and a portion of the crown section ( 400 ) between the crown apex ( 410 ) and the back ( 114 ) of the hollow body ( 110 ) has an apex-to-rear radius of curvature (Ra-r), wherein the apex-to-front radius of curvature (Ra-f) in contact with the crown apex ( 410 ) is at least 25% less than the greatest apex-to-rear radius of curvature (Ra-r) of the crown section ( 400 ) above the top edge height (TEH).
2. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein within a heel-to-toe vertical section through the crown apex ( 410 ) and parallel to the vertical plane created by the shaft axis (SA), a portion of the crown section ( 400 ) in contact with the crown apex ( 410 ) has a heel-to-toe radius of curvature (Rh-t) that is less than 4 inches.
3. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein within the front-to-back vertical section through the crown apex ( 410 ) and perpendicular to the vertical plane created by a shaft axis (SA), a portion of the crown section ( 400 ) between the crown apex ( 410 ) and the face ( 200 ) has an apex-to-front radius of curvature (Ra-f) that is less than 3 inches.
4. The high volume aerodynamic golf club head ( 100 ) of claim 3 , wherein the apex-to-front radius of curvature (Ra-f) in contact with the crown apex ( 410 ) is less than 3 inches.
5. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein the apex-to-front radius of curvature (Ra-f) in contact with the crown apex ( 410 ) is less than a heel-to-toe radius of curvature (Rh-t) in contact with the crown apex ( 410 ) where the heel-to-toe radius of curvature (Rh-t) is measured in a heel-to-toe vertical section through the crown apex ( 410 ) and parallel to the vertical plane created by the shaft axis (SA).
6. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein the apex-to-rear radius of curvature (Ra-r) in contact with the crown apex ( 410 ) is less than a heel-to-toe radius of curvature (Rh-t) in contact with the crown apex ( 410 ) where the heel-to-toe radius of curvature (Rh-t) is measured in the heel-to-toe vertical section through the crown apex ( 410 ) and parallel to the vertical plane created by the shaft axis (SA).
7. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein within the front-to-back vertical section through the crown apex ( 410 ) and perpendicular to the vertical plane created by the shaft axis (SA), a portion of the crown section ( 400 ) above the top edge height (TEH) has the apex-to-rear radius of curvature (Ra-r) less than 3.75 inches.
8. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein the apex ratio is at least 1.2.
9. The high volume aerodynamic golf club head ( 100 ) of claim 1 , further having a second moment of inertia (MOIx) about a horizontal axis through a center of gravity (CG) that is at least 2000 g*cm 2 .
10. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein 5-10% of the club head volume is located above the greatest top edge height (TEH).
11. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein the club head volume is at least 440 cc and the hollow body ( 110 ) has a front-to-back dimension (FB) of at least 4.4 inches.
12. The high volume aerodynamic golf club head ( 100 ) of claim 1 , wherein the hollow body ( 110 ) has a front-to-back dimension (FB) of at least 4.6 inches.
13. A high volume aerodynamic golf club head ( 100 ) comprising:
A) a hollow body ( 110 ) having a club head volume of at least 400 cc, a face ( 200 ), a sole section ( 300 ), a crown section ( 400 ), a front ( 112 ), a back ( 114 ), a heel ( 116 ), and a toe ( 118 );
B) the face ( 200 ) having a top edge ( 210 ) and a lower edge ( 220 ), wherein a top edge height (TEH) is the elevation of the top edge ( 210 ) above a ground plane (GP), and a lower edge height (LEH) is the elevation of the lower edge ( 220 ) above the ground plane (GP), wherein the greatest top edge height (TEH) is at least 2 inches; and
C) the crown section ( 400 ) having a crown apex ( 410 ) located an apex height (AH) above the ground plane (GP), wherein within a front-to-back vertical section through the crown apex ( 410 ) and perpendicular to a vertical plane created by a shaft axis (SA), a portion of the crown section ( 400 ) between the crown apex ( 410 ) and the face ( 200 ) has an apex-to-front radius of curvature (Ra-f) and a portion of the crown section ( 400 ) between the crown apex ( 410 ) and the back ( 114 ) has an apex-to-rear radius of curvature (Ra-r), wherein:
(i) the apex-to-front radius of curvature (Ra-f) in contact with the crown apex ( 410 ) is at least 25% less than the greatest apex-to-rear radius of curvature (Ra-r); and
(ii) the apex-to-rear radius of curvature (Ra-r) of a portion of the crown section ( 400 ) above the top edge height (TEH) is less than 3.75 inches.
14. The high volume aerodynamic golf club head ( 100 ) of claim 13 , wherein within a heel-to-toe vertical section through the crown apex ( 410 ) and parallel to the vertical plane created by the shaft axis (SA), the portion of the crown section ( 400 ) in contact with the crown apex ( 410 ) has a heel-to-toe radius of curvature (Rh-t) that is less than 4 inches.
15. The high volume aerodynamic golf club head ( 100 ) of claim 13 , wherein within the front-to-back vertical section through the crown apex ( 410 ) and perpendicular to the vertical plane created by a shaft axis (SA), the apex-to-front radius of curvature (Ra-f) of a portion of the crown section ( 400 ) is less than 3 inches.
16. The high volume aerodynamic golf club head ( 100 ) of claim 15 , wherein the apex-to-front radius of curvature (Ra-f) in contact with the crown apex ( 410 ) is less than 3 inches.
17. The high volume aerodynamic golf club head ( 100 ) of claim 13 , wherein the apex-to-front radius of curvature (Ra-f) in contact with the crown apex ( 410 ) is less than a heel-to-toe radius of curvature (Rh-t) in contact with the crown apex ( 410 ) where the heel-to-toe radius of curvature (Rh-t) is measured in the heel-to-toe vertical section through the crown apex ( 410 ) and parallel to the vertical plane created by the shaft axis (SA).
18. The high volume aerodynamic golf club head ( 100 ) of claim 13 , wherein the apex-to-rear radius of curvature (Ra-r) in contact with the crown apex ( 410 ) is less than a heel-to-toe radius of curvature (Rh-t) in contact with the crown apex ( 410 ) where the heel-to-toe radius of curvature (Rh-t) is measured in the heel-to-toe vertical section through the crown apex ( 410 ) and parallel to the vertical plane created by the shaft axis (SA).
19. The high volume aerodynamic golf club head ( 100 ) of claim 13 , wherein an apex ratio of the apex height (AH) to the greatest top edge height (TEH) is at least 1.13, and the golf club head has a second moment of inertia (MOIx) about a horizontal axis through a center of gravity (CG) that is at least 2000 g*cm 2 .
20. The high volume aerodynamic golf club head ( 100 ) of claim 19 , wherein the apex ratio is at least 1.2.