Wood-type golf club head
First Claim
Patent Images
1. A hollow wood-type golf club head having a face for hitting a golf ball, wherein:
- the moment of inertia Ix about a vertical axis passing through the club head'"'"'s center of gravity is 4,000 to 5,900 g·
cm2 in the standard state that the club head is placed on a horizontal plane in the state that an axial center line of a shaft is disposed in an optional vertical plane and is inclined at a prescribed lie angle with respect to the horizontal plane and said face is inclined at a prescribed loft angle,the moment of inertia Iy about a horizontal axis extending through the club head'"'"'s center of gravity is 3,000 to 5,900 g·
cm2, said face has a face bulge and a face roll,the radius of curvature Rx of the face bulge is from 18 to 25 inches,the Ry/Rx ratio of the radius of curvature Ry of the face roll to said radius of curvature Rx of the face bulge is 0.50 to 0.90, andthe Ry/Iy ratio of the face roll radius Ry to the moment of inertia Iy about the horizontal axis extending through the club head'"'"'s center of gravity in the toe-heel direction is from 0.0040 to 0.0080 inch/g·
cm2.
3 Assignments
0 Petitions
Accused Products
Abstract
A hollow wood-type golf club head with stable flight direction and flight distance performances, the club head having a moment of inertia Ix 4,000 to 5,900 g·cm2 about a vertical axis passing through the club head'"'"'s center of gravity, and comprising a face with face bulge and face roll such that the radius of curvature Rx of the face bulge is from 12 to 25 inches, and the Ry/Rx ratio of the radius of curvature Ry of the face roll to the radius of curvature Rx of the face bulge is 0.50 to 0.90.
90 Citations
4 Claims
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1. A hollow wood-type golf club head having a face for hitting a golf ball, wherein:
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the moment of inertia Ix about a vertical axis passing through the club head'"'"'s center of gravity is 4,000 to 5,900 g·
cm2 in the standard state that the club head is placed on a horizontal plane in the state that an axial center line of a shaft is disposed in an optional vertical plane and is inclined at a prescribed lie angle with respect to the horizontal plane and said face is inclined at a prescribed loft angle,the moment of inertia Iy about a horizontal axis extending through the club head'"'"'s center of gravity is 3,000 to 5,900 g·
cm2, said face has a face bulge and a face roll,the radius of curvature Rx of the face bulge is from 18 to 25 inches, the Ry/Rx ratio of the radius of curvature Ry of the face roll to said radius of curvature Rx of the face bulge is 0.50 to 0.90, and the Ry/Iy ratio of the face roll radius Ry to the moment of inertia Iy about the horizontal axis extending through the club head'"'"'s center of gravity in the toe-heel direction is from 0.0040 to 0.0080 inch/g·
cm2. - View Dependent Claims (2, 3, 4)
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Specification
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Current AssigneeSumitomo Rubber Industries Limited
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Original AssigneeSRI Sports Limited (Sumitomo Rubber Industries Limited)
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InventorsOyama, Hitoshi
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Primary Examiner(s)Passaniti, Sebastiano
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Application NumberUS12/352,643Publication NumberTime in Patent Office1,204 DaysField of Search473324-350, 473287-292US Class Current473/330CPC Class CodesA63B 2209/00 Characteristics of used mat...A63B 53/0408 characterised by specific d...A63B 53/0445 Details of grooves or the l...A63B 53/0458 with non-uniform thickness ...A63B 53/0462 characterised by tapering t...A63B 53/0466 wood-type
