GOLF CLUB HEAD WITH OPTIMIZED MOI AND/OR ROLL RADIUS
First Claim
Patent Images
1. A golf club head comprising:
- a hosel, strike face, and a body wall defining a hollow body substantially enclosing an inner volume; and
a weighted area of the body wall having a mass per unit area greater than an overall mass per unit area of the body wall, the weighted area being within a distance D of about 3 cm from a plane P that intersects the strike face, a toe side of a crown of the body, and a heel side of a sole of the body.
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Abstract
A golf club head with moments of inertia that are optimized about principal axes of the club head. The club head can have a roll radius about its ball striking face that is decreased above a first axis, and increased below the first axis, the first axis being correlated with the principal axes of the club head.
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Citations
26 Claims
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1. A golf club head comprising:
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a hosel, strike face, and a body wall defining a hollow body substantially enclosing an inner volume; and a weighted area of the body wall having a mass per unit area greater than an overall mass per unit area of the body wall, the weighted area being within a distance D of about 3 cm from a plane P that intersects the strike face, a toe side of a crown of the body, and a heel side of a sole of the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A golf club head comprising:
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a body coupled to a hosel; a moment of inertia IZ about an axis Z, wherein Z is vertical when at address; a moment of inertia IA about an axis A, wherein A intersects Z to define a non-zero angle θ
A, and further wherein IA is greater than IZ; anda strike face with a striking surface, wherein points evenly spaced in a line on the surface define N surface normals, each defining an angle θ
N with the next, such that a θ
i near a crown of the club head is larger than a θ
j near the sole. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A golf club head comprising:
a ball striking face comprising; a geometric center point located on a surface of the ball striking face, the geometric center point located generally equidistantly from an uppermost portion of the ball striking face and a lowermost portion of the ball striking face, as well as equidistantly from a heel and toe end of the ball striking face; a vertical axis comprising an axis that extends through the geometric center point, the vertical axis oriented vertically relative to a flat playing surface when the club head is at an address position; a horizontal axis extending through the geometric center point, the horizontal axis perpendicular to the vertical axis and extending horizontally and generally parallel to the flat playing surface, the horizontal axis comprising an axis that is angled at zero degrees relative to the address position when the club head is neither open nor closed at address; a hitting zone defined by an anticipated or measured area on the ball striking face where a majority of a golfer'"'"'s hits typically occur, the hitting zone having generally an elliptical shape angled upwardly from a heel side of the club head to a toe side of the club head; a major axis extending through the elliptical hitting zone, the major axis defining a first principal axis of the club head, the major axis being tilted at a non-zero angle relative to the horizontal axis; a minor axis extending perpendicular to the major axis, the minor axis defining a second principal axis of the club head, the minor axis tilted at the non-zero angle relative to the vertical axis; wherein a moment of inertia of the club head about the major axis is greater than a moment of inertia of the club head about the horizontal axis; and wherein the club head further comprises; a first roll radius, and a second roll radius, the first roll radius smaller than the second roll radius. - View Dependent Claims (22, 23, 24, 25, 26)
Specification