High loft, low center-of-gravity golf club heads
First Claim
Patent Images
1. A golf club head, comprising:
- a body defining an interior cavity, a sole portion positioned at a bottom portion of the golf club head, a crown portion positioned at a top portion, a forward portion and a rearward portion, and a face positioned at the forward portion of the body, the face having a varying thickness of no greater than 5 mm;
wherein the body has a volume greater than 250 cm3;
wherein the face has a static loft angle;
wherein the golf club head has a center of gravity that is 5-20 mm below the geometric center of the face of the golf club head as measured along a z-axis of the golf club head having an origin at the geometric center;
wherein a projection of the center of gravity is located on the face and at an elevation below the geometric center of the face;
wherein the golf club head has a Delta 1 value of less than or equal to 25 mm;
wherein the golf club head has a moment of inertia about a golf club head center-of-gravity x-axis, Ixx, of 150-500 kg-mm2; and
wherein, at a normal address position, the sole portion is inclined at a sole angle of 5-40 degrees relative to a ground plane, such that a lowest point on the sole portion is at or near a rearmost point on the sole portion, and the sole portion slopes upward from the lowest point to a frontmost point on the sole portion.
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Accused Products
Abstract
A golf club and golf club head having a high static loft angle, low forward center of gravity, and enhanced z-axis gear effect via a large roll radius and/or tightly controlled moment of inertia about the CG x-axis, Ixx, associated with upward and downward twisting of the club head.
63 Citations
20 Claims
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1. A golf club head, comprising:
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a body defining an interior cavity, a sole portion positioned at a bottom portion of the golf club head, a crown portion positioned at a top portion, a forward portion and a rearward portion, and a face positioned at the forward portion of the body, the face having a varying thickness of no greater than 5 mm; wherein the body has a volume greater than 250 cm3; wherein the face has a static loft angle; wherein the golf club head has a center of gravity that is 5-20 mm below the geometric center of the face of the golf club head as measured along a z-axis of the golf club head having an origin at the geometric center; wherein a projection of the center of gravity is located on the face and at an elevation below the geometric center of the face; wherein the golf club head has a Delta 1 value of less than or equal to 25 mm; wherein the golf club head has a moment of inertia about a golf club head center-of-gravity x-axis, Ixx, of 150-500 kg-mm2; and wherein, at a normal address position, the sole portion is inclined at a sole angle of 5-40 degrees relative to a ground plane, such that a lowest point on the sole portion is at or near a rearmost point on the sole portion, and the sole portion slopes upward from the lowest point to a frontmost point on the sole portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A golf club head, comprising:
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a club head body having an external surface with a heel portion, a toe portion, a crown, a sole, and a ball striking face having a thickness no greater than 5.0 mm; wherein the wherein the body has a volume greater than 250 cm3 and the ball striking face has a static loft angle; wherein the ball striking face of the club head body has a geometric center; wherein the golf club head has a center of gravity that is 5-20 mm below the geometric center of the face of the golf club head as measured along a z-axis of the golf club head having an origin at the geometric center; wherein the golf club head has a Delta 1 value of 10-25 mm; wherein the golf club head has a moment of inertia about a golf club head center-of-gravity x-axis, Ixx, of 150-500 kg-mm2; wherein a first portion of the body located at least partially above the geometric center of the face is formed of a non-metallic material having a non-metallic material density and a first portion thickness; wherein a second portion of the body located at least partially below the geometric center of the face is formed of a metallic material having a metallic material density that is at least twice the non-metallic material density; and wherein, at a normal address position, the sole portion is inclined at a sole angle of 5-40 degrees relative to a ground plane, such that a lowest point on the sole portion is at or near a rearmost point on the sole portion, and the sole portion slopes upward from the lowest point to a frontmost point on the sole portion. - View Dependent Claims (12, 13, 14, 15)
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16. A golf club, comprising:
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a shaft having a grip at one end and a golf club head at the other end; the golf club head having a body defining an interior cavity, a sole portion positioned at a bottom portion of the golf club head, a crown portion positioned at a top portion, a forward portion and a rearward portion, and a face positioned at the forward portion of the body, the face having a thickness of no greater than 5 mm; wherein the body has a volume greater than 250 cm3; wherein the face has a static loft angle; wherein the golf club head has a center of gravity that is 5-20 mm below the geometric center of the face of the golf club head as measured along a z-axis of the golf club head having an origin at the geometric center; wherein the golf club head has a Delta 1 value of less than or equal to 25 mm; and wherein the golf club head has a moment of inertia about a golf club head center-of-gravity x-axis, Ixx, of 150-250 kg-mm2; wherein the golf club head has a roll radius; and wherein, at a normal address position, the sole portion is inclined at a sole angle of 5-40 degrees relative to a ground plane, such that a lowest point on the sole portion is at or near a rearmost point on the sole portion, and the sole portion slopes upward from the lowest point to a frontmost point on the sole portion. - View Dependent Claims (17, 18, 19, 20)
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Specification