Aerodynamic golf club head
First Claim
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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), a toe (118), and a center of gravity (CG), wherein the hollow body (110) has a front-to-back dimension (FB) of at least 4.4 inches;
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 the ground plane (GP), and a lower edge height (LEH) is the elevation of the lower edge (220) above the ground plane (GP), wherein a maximum top edge height (TEH) is at least 2 inches;
C) the crown section (400) having a crown apex (410) located an apex height (AH) above a ground plane (GP), wherein;
(i) 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);
(ii) 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), above the elevation of the maximum top edge height (TEH), has a heel-to-toe radius of curvature (Rh-t) that is less than 4 inches at the crown apex (410); and
(iii) within the front-to-back vertical section a portion of the crown section (400), above the elevation of the maximum top edge height (TEH), between the crown apex (410) and the back (114) has an apex-to-rear radius of curvature (Ra-r) that is less than the heel-to-toe radius of curvature (Rh-t) at the crown apex (410);
(iv) a portion of the crown section (400) has a density less than a portion of the sole section (300);
(v) the crown apex (410) is behind the forwardmost point on the face (200) a distance that is a crown apex setback dimension (412), and the crown apex setback dimension (412) is less than a distance that is parallel to the crown apex setback dimension (412) and is measured from a vertical projection of the center of gravity (CG) on the ground plane (GP) to a vertical projection of the forwardmost point on the face (200) on the ground plane (GP); and
D) the high volume aerodynamic golf club head (100) has a moment of inertia (MOIx) about a horizontal axis through the center of gravity (CG) that is at least 2000 g*cm2.
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Abstract
An aerodynamic golf club head having a crown section that imparts beneficial aerodynamic properties due in part to the location of a crown apex and the curvature of the crown section.
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Citations
20 Claims
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1. A high volume aerodynamic golf club head (100) comprising:
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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), a toe (118), and a center of gravity (CG), wherein the hollow body (110) has a front-to-back dimension (FB) of at least 4.4 inches; 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 the ground plane (GP), and a lower edge height (LEH) is the elevation of the lower edge (220) above the ground plane (GP), wherein a maximum top edge height (TEH) is at least 2 inches; C) the crown section (400) having a crown apex (410) located an apex height (AH) above a ground plane (GP), wherein; (i) 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); (ii) 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), above the elevation of the maximum top edge height (TEH), has a heel-to-toe radius of curvature (Rh-t) that is less than 4 inches at the crown apex (410); and (iii) within the front-to-back vertical section a portion of the crown section (400), above the elevation of the maximum top edge height (TEH), between the crown apex (410) and the back (114) has an apex-to-rear radius of curvature (Ra-r) that is less than the heel-to-toe radius of curvature (Rh-t) at the crown apex (410); (iv) a portion of the crown section (400) has a density less than a portion of the sole section (300); (v) the crown apex (410) is behind the forwardmost point on the face (200) a distance that is a crown apex setback dimension (412), and the crown apex setback dimension (412) is less than a distance that is parallel to the crown apex setback dimension (412) and is measured from a vertical projection of the center of gravity (CG) on the ground plane (GP) to a vertical projection of the forwardmost point on the face (200) on the ground plane (GP); and D) the high volume aerodynamic golf club head (100) has a moment of inertia (MOIx) about a horizontal axis through the center of gravity (CG) that is at least 2000 g*cm2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A high volume aerodynamic golf club head (100) comprising:
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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), wherein the hollow body (110) has a front-to-back dimension (FB) of at least 4.4 inches; 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 the ground plane (GP), and a lower edge height (LEH) is the elevation of the lower edge (220) above the ground plane (GP), wherein a maximum 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 a ground plane (GP), wherein; (i) 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); (ii) 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), above the elevation of the maximum top edge height (TEH), has a heel-to-toe radius of curvature (Rh-t), wherein the heel-to-toe radius of curvature (Rh-t) is less than 4 inches on a portion of the crown section (400) located above the elevation of the maximum top edge height (TEH); (iii) within the front-to-back vertical section a portion of the crown section (400), above the elevation of the maximum top edge height (TEH), between the crown apex (410) and the back (114) has an apex-to-rear radius of curvature (Ra-r) that is less than the heel-to-toe radius of curvature (Rh-t) at the crown apex (410); and (iv) wherein the apex-to-front radius of curvature (Ra-f) at the crown apex (410) is less than 3 inches and at least 25% less than the greatest apex-to-rear radius of curvature (Ra-r) located above the top edge height (TEH). - View Dependent Claims (15, 16, 17, 18, 19)
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20. A high volume aerodynamic golf club head (100) comprising:
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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), a toe (118), and a center of gravity (CG), wherein the hollow body (110) has a front-to-back dimension (FB) of at least 4.4 inches; 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 the ground plane (GP), and a lower edge height (LEH) is the elevation of the lower edge (220) above the ground plane (GP), wherein a maximum top edge height (TEH) is at least 2 inches, and less than 10% of the club head volume is above the elevation of the maximum top edge height (TEH); and C) the crown section (400) having a crown apex (410) located an apex height (AH) above a ground plane (GP), and the crown apex (410) is behind the forwardmost point on the face (200) a distance that is a crown apex setback dimension (412), and the crown apex setback dimension (412) is less than 1.75 inches, wherein; (i) 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); (ii) 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), above the elevation of the maximum top edge height (TEH), has a heel-to-toe radius of curvature (Rh-t), wherein the heel-to-toe radius of curvature (Rh-t) is less than 4 inches on a portion of the crown section (400) located above the elevation of the maximum top edge height (TEH); and (iii) within the front-to-back vertical section a portion of the crown section (400), above the elevation of the maximum top edge height (TEH), between the crown apex (410) and the back (114) has an apex-to-rear radius of curvature (Ra-r) that is less than the heel-to-toe radius of curvature (Rh-t) at the crown apex (410); (iv) wherein the apex-to-front radius of curvature (Ra-f) at the crown apex (410) is less than the greatest apex-to-rear radius of curvature (Ra-r) located above the top edge height (TEH), and the apex-to-front radius of curvature (Ra-f) at the crown apex (410) is less than the heel-to-toe radius of curvature (Rh-t) at the crown apex (410); (v) the crown apex (410) is behind the forwardmost point on the face (200) a distance that is a crown apex setback dimension (412), and the crown apex setback dimension (412) is less than a distance that is parallel to the crown apex setback dimension (412) and is measured from a vertical projection of the center of gravity (CG) on the ground plane (GP) to a vertical projection of the forwardmost point on the face (200) on the ground plane (GP); and (vi) a portion of the crown section (400) is formed of nonmetallic material, and the nonmetallic portion of the crown section (400) includes the crown apex (410).
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Specification