A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 m and not greater than 30 m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 m and not greater than 50 m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 m and not greater than 50 m.

A golf ball has a plurality of minute projections 20 on a surface thereof. An average value Hav of heights H of these minute projections 20 is not less than 0.5 m and not greater than 50 m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the minute projections 20 on these first zones is higher than an average value Hav2 of the heights H of the minute projections 20 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.
3(Hav1Hav2)50

A golf ball has a large number of exposed portions 22 on a surface thereof. An average value Hav of heights H of these exposed portions 22 is not less than 0.5 m and not greater than 50 m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the exposed portions 22 on these first zones is higher than an average value Hav2 of the heights H of the exposed portions 22 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.
3(Hav1Hav2)50

A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. An average depth Fav of the dimples 12 and an average height Hav of the minute projections satisfy the following mathematical formula (1).
Hav/Fav0.050(1)
A ratio M (%) of a sum of areas of all the dimples 12 relative to a surface area of a phantom sphere of the golf ball and an average value Pav (m) of pitches P each between a minute projection 18 and another minute projection 18 adjacent to this minute projection 18 satisfy the following mathematical formula (2).
M/Pav>0.3(2)

A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 m and not greater than 30 m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 m and not greater than 50 m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 m and not greater than 50 m.

A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The minute projections 18 are exposed on the surface of the golf ball. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 m and not greater than 30 m. The surface of the golf ball has a maximum height Sz of not less than 5 m and not greater than 200 m.

The present invention provides a method for arranging dimples on a golf ball surface in which the dimples are arranged in a pattern derived from at least one irregular domain generated from a regular or non-regular polyhedron. The method includes choosing control points of a polyhedron, generating an irregular domain based on those control points, packing the irregular domain with dimples, and tessellating the irregular domain to cover the surface of the golf ball. The control points include the center of a polyhedral face, a vertex of the polyhedron, a midpoint or other point on an edge of the polyhedron and others. The method ensures that the symmetry of the underlying polyhedron is preserved while minimizing or eliminating great circles due to parting lines.

The present invention relates to golf balls, specifically, to a golf ball with multifaceted dimples comprising two discrete geometries including a circular perimeter and a depression or protrusion based on a polyhedral prismatoid.

Golf ball comprising dimple(s) incorporating three or more linear channels having the same channel length L and same channel width CW; all linear channels extend radially outward from a centroid of the dimple toward a perimeter of the dimple without intersecting the dimple's centroid. Each linear channel may extend radially outward from a location on the dimple that is a distance Cd from the dimple's centroid, wherein Cd>0. Alternatively, at least one of the three or more linear channels has a different channel length L and/or a different channel width CW than at least one other linear channel. Dimple may have circular or non-circular plan shape; channels may not intersect each other; at least one linear channel may intersect the dimple's perimeter; and linear channels may be spaced by n separation angles .sub.S, wherein n is number of linear channels, which may be equal, or at least two differ.

A golf ball has a plurality of minute projections 20 on a surface thereof. An average value Hav of heights H of these minute projections 20 is not less than 0.5 m and not greater than 50 m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the minute projections 20 on these first zones is higher than an average value Hav2 of the heights H of the minute projections 20 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.

3(Hav1-Hav2)50