GOLF CLUB WITH OPTIMUM MOMENTS OF INERTIA IN THE VERTICAL AND HOSEL AXIS
First Claim
1. A golf club comprising a shaft and a club head,wherein the club head comprises a y-axis running in a vertical direction through a geometric center of the club head and a hosel axis running parallel to a center of the shaft through a hosel base,wherein the club head has a horizontal bulge radius of about 12 inches and a vertical roll radius of about 10 inches if a MOI(y-axis) is greater than about 450 kg·
- mm2 and less than about 500 kg·
mm2;
wherein the club head has a horizontal bulge radius of about 13 inches and a vertical roll radius of about 10 inches if the MOI(y-axis) is greater than about 500 kg·
mm2 and less than about 550 kg·
mm2; and
wherein the club head has a horizontal bulge radius of about 14 inches and a vertical roll radius of about 10 inches if the MOI(y-axis) is greater than about 550 kg·
mm2.
6 Assignments
0 Petitions
Accused Products
Abstract
A hollow golf club is provided having an outer shell and an inner frame. The outer shell comprises one or more lightweight members, such as the crown or the skirt, and preferably fits within an envelope of about 5 inches×5 inches×2.8 inches. The inner frame fits within a smaller envelope and sits on the sole of the club head. One or more weights are located either on or within the inner frame to optimize the moment of inertia of the club head about both the vertical axis running through the center of gravity or geometric center of the club head, hereinafter referred to as the “y-axis,” and the axis running through the center of the shaft of the golf club, hereinafter referred to as the “hosel axis.” The weights can be attached to the inner frame or can be distributed within the inner frame. In another embodiment, the hitting face and a portion of the skirt proximate the toe form a curved blade in the shape of a sickle or battle ax and an inner support bridges the toe end of the curved blade to the hosel for structural support. The ratio of moment of inertia of the club head about the y-axis to moment of inertia of the club head about the hosel axis is preferably 0.55. More preferably, this ratio is 0.75.
48 Citations
19 Claims
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1. A golf club comprising a shaft and a club head,
wherein the club head comprises a y-axis running in a vertical direction through a geometric center of the club head and a hosel axis running parallel to a center of the shaft through a hosel base, wherein the club head has a horizontal bulge radius of about 12 inches and a vertical roll radius of about 10 inches if a MOI(y-axis) is greater than about 450 kg· - mm2 and less than about 500 kg·
mm2;wherein the club head has a horizontal bulge radius of about 13 inches and a vertical roll radius of about 10 inches if the MOI(y-axis) is greater than about 500 kg·
mm2 and less than about 550 kg·
mm2; andwherein the club head has a horizontal bulge radius of about 14 inches and a vertical roll radius of about 10 inches if the MOI(y-axis) is greater than about 550 kg·
mm2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- mm2 and less than about 500 kg·
-
10. A golf club head comprising a shaft and a club head,
wherein the club head comprises a y-axis running in a vertical direction through a geometric center of the club head and a hosel axis running parallel to a center of the shaft through a hosel base, wherein a MOI(hosel axis) is equal to or less than about 800 kg· - mm2 and wherein the MOI(y-axis) is equal to or greater than about 450 kg·
mm2;wherein the club head has a horizontal bulge radius of about 12 inches and a vertical roll radius of about 10 inches if the MOI(y-axis) is greater than about 450 kg·
mm2 and less than about 500 kg·
mm2;wherein the club head has a horizontal bulge radius of about 13 inches and a vertical roll radius of about 10 inches if the MOI(y-axis) is greater than about 500 kg·
mm2 and less than about 550 kg·
mm2; andwherein the club head has a horizontal bulge radius of about 14 inches and a vertical roll radius of about 10 inches if the MOI(y-axis) is greater than about 550 kg·
mm2. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
- mm2 and wherein the MOI(y-axis) is equal to or greater than about 450 kg·
Specification
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- Resources
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Current AssigneeAcushnet Company (FILA Holdings Corp.)
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Original AssigneeAcushnet Company (FILA Holdings Corp.)
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Inventorsde la Cruz, Noah, Golden, Charles E., Morin, John W.
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current473/345
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CPC Class CodesA63B 2053/0491 with added weights, e.g. ch...A63B 2209/00 Characteristics of used mat...A63B 2209/023 Long, oriented fibres, e.g....A63B 53/04 HeadsA63B 53/0408 characterised by specific d...A63B 53/0412 VolumeA63B 53/0433 with special sole configura...A63B 53/0437 with special crown configur...A63B 53/0441 with visual indicators for ...A63B 53/045 Strengthening ribsA63B 53/0466 wood-typeA63B 60/00 Details or accessories of g...A63B 60/02 Ballast means for adjusting...
