Golf ball
First Claim
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1. A golf ball comprising;
- a spherical surface inscribed or circumscribed with a regular icosahedron and a plurality of dimples formed in the spherical surface, a first series of great circles each including each side of a spherical triangle projected from a regular triangle constituting said regular icosahedron onto said spherical surface and a second series of great circles each including a line segment drawn from a midpoint of said side of said spherical surface to its diagonal point are depicted on said spherical surface, and said dimples symmetrically arranged with respect to each of said first and second series of great circles as a symmetry axis in said spherical triangle and paths of said first and second series of great circles on said spherical surface not passing through any of said dimples.
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Abstract
A golf ball has a spherical surface inscribed or circumscribed with a regular icosahedron, and dimples (3) formed in the spherical surface. The golf ball has a first great circle (5) including a side of a spherical triangle (4a) projected onto the spherical surface and another great circle including a line segment drawn from a midpoint (4b) of the side to its diagonal point (4c) depicted on the spherical surface. Dimples (3) are symmetrically arranged in the spherical triangle with respect to each of 15 great circles as a symmetry axis.
51 Citations
3 Claims
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1. A golf ball comprising;
- a spherical surface inscribed or circumscribed with a regular icosahedron and a plurality of dimples formed in the spherical surface, a first series of great circles each including each side of a spherical triangle projected from a regular triangle constituting said regular icosahedron onto said spherical surface and a second series of great circles each including a line segment drawn from a midpoint of said side of said spherical surface to its diagonal point are depicted on said spherical surface, and said dimples symmetrically arranged with respect to each of said first and second series of great circles as a symmetry axis in said spherical triangle and paths of said first and second series of great circles on said spherical surface not passing through any of said dimples.
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Specification
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Current AssigneeBridgestone Corporation
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Original AssigneeBridgestone Corporation
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InventorsIhara, Keisuke
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Primary Examiner(s)Marlo, George J.
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Application NumberUS07/084,765Time in Patent Office691 DaysField of Search273/232US Class Current473/379CPC Class CodesA63B 37/0006 Arrangement or layout of di...A63B 37/0016 Specified individual dimple...A63B 37/0017 Specified total dimple volumeA63B 37/00215 Volume ratio
