Golf ball dimples defined by superposed curves
The present invention is a golf ball which comprises dimples having a cross section defined by the superposition of two or more continuous and differentiable functions, and particularly the superposition of a spherical curve and a cosine curve. Additionally, the dimples preferably have a circular boundary and maintain an axis coincident with the center of the circular boundary.
1. A golf ball having a surface with a plurality of recessed dimples thereon, wherein at least one of the dimples is a superposed dimple having a cross-section defined by a function resulting from the sum of a spherical function and a cosine function.
2. The golf ball of claim 1 , wherein the superposed dimple has a circular plan shape.
3. The golf ball of claim 1 , wherein the superposed dimple has a surface depth of 0.020 inches or less.
4. The golf ball of claim 1 , wherein the superposed dimple has a surface depth of 0.015 inches or less.
5. The golf ball of claim 1 , wherein the superposed dimple has a chord volume (in 3 ×10 −5 ), V D , at any given dimple diameter (inches), D D , such that:
66.67 D 2 +35.33 D D −2.80≤ V D ≤407.14 D D 2 −17.79 D D −0.09.
6. The golf ball of claim 1 , wherein the superposed dimple has a chord volume (in 3 ×10 −5 ), V D , at any given dimple diameter (inches), D D , such that:
152.86 D D 2 +20.59 D D −1.93≤ V D ≤319.05 D D 2 −3.76 D D −0.81.