Golf balls
First Claim
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1. A golf ball comprising;
- a spherical surface inscribed or circumscribed with a regular icosahedron and dimples formed in the spherical surface, groups of great circles, a first group composed of great circles (22) including each side of spherical triangles (21) formed by projecting regular triangles constituting said regular icosahedron onto said spherical surface, great circles (23) including a line segment drawn from a midpoint (A) of said side of said spherical triangles to its diagonal point, a second group composed of great circles (24) including a line segment drawn from a midpoint of a side in the spherical triangle to another midpont of another side thereof, and a third group composed of great circles (25) including a line segment obtained by projecting a line drawn from a midpoint of each side of said regular triangle and normal thereto to its opposed side thereof onto said spherical surface, each great circle of said groups not crossing over the dimples.
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Accused Products
Abstract
A golf ball has a spherical surface inscribed or circumscribed with a regular icosahedron, and dimples formed in the spherical surface. This golf ball has at least 16 symmetrical axes or great circles and provides accurate flying directionality and driving distance. The invention provides in various embodiments 21, 25 or 31 great circles 22, 23, 24 and 25 that do not intersect the dimples on the surface.
33 Citations
4 Claims
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1. A golf ball comprising;
- a spherical surface inscribed or circumscribed with a regular icosahedron and dimples formed in the spherical surface, groups of great circles, a first group composed of great circles (22) including each side of spherical triangles (21) formed by projecting regular triangles constituting said regular icosahedron onto said spherical surface, great circles (23) including a line segment drawn from a midpoint (A) of said side of said spherical triangles to its diagonal point, a second group composed of great circles (24) including a line segment drawn from a midpoint of a side in the spherical triangle to another midpont of another side thereof, and a third group composed of great circles (25) including a line segment obtained by projecting a line drawn from a midpoint of each side of said regular triangle and normal thereto to its opposed side thereof onto said spherical surface, each great circle of said groups not crossing over the dimples.
- View Dependent Claims (2, 3, 4)
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 NumberUS07/118,690Time in Patent Office680 DaysField of Search273/232, 273/213, 273/183 C, 273/235 R, 40/327US Class Current473/379CPC Class CodesA63B 37/0004 Surface depressions or prot...A63B 37/0006 Arrangement or layout of di...A63B 37/0009 PolygonalA63B 37/0018 Specified number of dimples
