Golf club head
First Claim
Patent Images
1. A golf club head comprising six or more ribs disposed on a face backside, the ribs being extended from a face center toward face circumferences,wherein an angle θ
- (°
) between extension directions of adjoining ribs is less than 90°
,wherein one of the ribs that forms the smallest angle between its extension direction and a head vertical direction and that extends from the face center toward a crown-side face circumference constitutes an upward rib, which has a smaller cross-sectional area than any of those of the other ribs, andwherein the ribs have widths of 3 mm to 14 mm and heights of 0.3 mm to 1.5 mm.
1 Assignment
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Accused Products
Abstract
A face backside of a golf club head is provided with six or more ribs extended from a face center toward face circumferences. Angles θ1 to θ6 between respective pairs of adjoining ones of the ribs are less than 90°. One of the ribs that form the smallest angle between its extension direction and a head vertical direction d1 and that extends from the face center toward a crown-side face circumference constitutes an upward rib, which has a smaller cross-sectional area than any of those of the other ribs.
84 Citations
8 Claims
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1. A golf club head comprising six or more ribs disposed on a face backside, the ribs being extended from a face center toward face circumferences,
wherein an angle θ - (°
) between extension directions of adjoining ribs is less than 90°
,wherein one of the ribs that forms the smallest angle between its extension direction and a head vertical direction and that extends from the face center toward a crown-side face circumference constitutes an upward rib, which has a smaller cross-sectional area than any of those of the other ribs, and wherein the ribs have widths of 3 mm to 14 mm and heights of 0.3 mm to 1.5 mm. - View Dependent Claims (2, 3, 4)
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5. A golf club head comprising six or more ribs disposed on a face backside, the ribs being extended from a face center toward face circumferences,
wherein an angle θ - (°
) between extension directions of adjoining ribs is less than 90°
,wherein one of the ribs that forms the smallest angle between its extension direction and a head vertical direction and that extends from the face center toward a crown-side face circumference constitutes an upward rib, which has a smaller cross-sectional area than any of those of the other ribs, and wherein a roundness of a curvature radius R(mm) is imparted to an intersection of boundary lines of adjoining ones of the ribs and wherein the value of a ratio (θ
/R) between the curvature radius R(mm) and the angle θ
(°
) between the adjoining ribs is in the range of 3 to 50.
- (°
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6. A golf club head comprising six or more ribs disposed on a face backside, the ribs being extended from a face center toward face circumferences,
wherein an angle θ - (°
) between extension directions of adjoining ribs is less than 90°
,wherein one of the ribs that forms the smallest angle between its extension direction and a head vertical direction and that extends from the face center toward a crown-side face circumference constitutes an upward rib, which has a smaller cross-sectional area than any of those of the other ribs, and wherein a value given by dividing a rib height by the rib width is 0.05 or more and 0.20 or less.
- (°
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7. A golf club head comprising six or more ribs disposed on a face backside, the ribs being extended from a face center toward face circumferences,
wherein an angle θ - (°
) between extension directions of adjoining the ribs is less than 90°
,wherein one of the ribs that forms the smallest angle between its extension direction and a head vertical direction and that extends from the face center toward a crown-side face circumference constitutes an upward rib, which has a smaller cross-sectional area than any of those of the other ribs, and wherein the boundary lines dividing each of the ribs from non-rib portions exist on widthwise either side of each rib, and each intersection of the boundary lines of adjoining ribs is rounded to impart a roundness of a curvature of a curvature radius R=1 to 15 mm.
- (°
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8. A golf club head comprising six or more ribs disposed on a face backside, the ribs being extended from a face center toward face circumferences,
wherein an angle θ - (°
) between extension directions of adjoining ribs is less than 90°
,wherein one of the ribs that forms the smallest angle between its extension direction and a head vertical direction and tat extends from the face center toward a crown-side face circumference constitutes an upward rib, which has a smaller cross-sectional area than any of those of the other ribs, and wherein boundary lines dividing each of the ribs from non-rib portions exist on widthwise either side of each rib, and each intersection of the boundary lines of adjoining ribs is rounded to impart a roundness of a curvature radius R, and wherein relationships R(1)≧
R2≧
. . . ≧
R(m) and R(1)≧
R(m) are satisfied, provided that plural angles θ
, each of angles θ
being defined by respective pair of adjoining ribs, are represented by θ
(1), θ
(2), . . . , θ
(m) in the descending order of the values thereof, that an inter-rib curvature radius R with respect to the angle θ
(1) is represented by R(1), that an inter-rib curvature radius R with respect to the angle θ
(2) is represented by R(2), . . . , and that an inter-rib curvature radius R with respect to the angle θ
(m) is represented by R(m).
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Specification
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Current AssigneeSRI Sports Limited (Sumitomo Rubber Industries Limited)
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Original AssigneeSRI Sports Limited (Sumitomo Rubber Industries Limited)
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InventorsTsunoda, Masaya, Nishio, Masayoshi
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Primary Examiner(s)GORDEN, RAEANN
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Application NumberUS11/282,773Publication NumberTime in Patent Office1,191 DaysField of Search473/346, 473/350US Class Current473/350CPC Class CodesA63B 2209/02 with reinforcing fibres, e....A63B 53/04 HeadsA63B 53/0408 characterised by specific d...A63B 53/045 Strengthening ribsA63B 53/0454 Strengthening ribs on the r...A63B 53/0458 with non-uniform thickness ...A63B 53/0466 wood-typeA63B 53/047 iron-typeA63B 60/00 Details or accessories of g...
