Patent ID: 8083614
Filing Date: 2011-12-27
Classification: A63B

Abstract:
1. A golf ball comprising a plurality of circular dimples and a plurality of noncircular dimples on a surface thereof, the noncircular dimples being provided between the circular dimples, wherein the noncircular dimples each have a border line which is a boundary line on the surface, the boundary line formed by connecting a plurality of border segments, each border segment being any one of a line segment and a smoothly curved segment, wherein the noncircular dimple has a bottom surface formed by connecting at least five facets to each other, the facets formed on the basis of at least five curved reference lines, wherein each of the curved reference lines passes a reference point set inside a virtual sphere and any one of at least five border points provided respectively at positions on the boundary line excluding connecting points of the border segments, and is tangential to a reference plane at the reference point, the virtual sphere having a diameter corresponding to an external diameter of the golf ball, and the reference plane having the reference point, wherein the facets are each defined as a region on a surface, wherein the region is surrounded by at least one of the border segments and at least two of the curved reference lines, and wherein at any point on the reference line connecting between the facets adjacent to each other, the facet and the adjacent facet have the same tangential plane.