GOLF BALL DIMPLES HAVING CIRCUMSCRIBED PRISMATOIDS
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.
1 . A golf ball having recessed dimples on the surface thereof, wherein at least one dimple comprises a first circular perimeter located at the chord plane, a second circular perimeter located below the chord plane, and a prismatoid depression or protrusion having a base with a plurality of vertices, wherein the vertices are in contact with the second circular perimeter.
2 . The golf ball of claim 1 , wherein the first circular perimeter and the second circular perimeter have the same diameter.
3 . The golf ball of claim 1 , wherein the second circular perimeter is concentric within the first circular perimeter.
4 . The golf ball of claim 3 , wherein the ratio of the first circular perimeter diameter and second circular perimeter diameter is defined by:
r
c
=
D
S
D
D
wherein:
r c is the circle ratio,
D D is the diameter of the first circular perimeter,
D S is the diameter of the second circular perimeter, and
the range of values for r c is from about 0.25 to about 0.90.
5 . The golf ball of claim 1 , wherein the prismatoid is further defined by an intersecting plane that is parallel to the prismatoid base.
6 . The golf ball of claim 1 , wherein the prismatoid is further defined by an intersecting plane that is oblique to the prismatoid base.
7 . A golf ball having recessed dimples on the surface thereof, wherein at least one dimple comprises a first circular perimeter located at the chord plane, a second circular perimeter located below the chord plane and having the same diameter as the first circular perimeter, and a prismatoid depression or protrusion having a base with a plurality of vertices, wherein the vertices are not in contact with the second circular perimeter.
8 . The golf ball of claim 7 , wherein the prismatoid is further defined by an intersecting plane that is parallel to the prismatoid base.
9 . The golf ball of claim 7 , wherein the prismatoid is further defined by an intersecting plane that is oblique to the prismatoid base.
10 . A golf ball having recessed dimples on the surface thereof, wherein at least one dimple comprises:
an upper dimple defined by a circular perimeter located at the chord plane and an upper dimple sidewall, wherein the upper dimple sidewall terminates at an intersection with a prismatoid depression or protrusion.
11 . The golf ball of claim 10 , wherein the prismatoid comprises a base and a plurality of vertices, and wherein the vertices are in contact with the circular perimeter.
12 . The golf ball of claim 10 , wherein the prismatoid comprises a base and a plurality of vertices, and wherein the vertices are not in contact with the circular perimeter.
13 . The golf ball of claim 10 , wherein the prismatoid is further defined by an intersecting plane that is parallel to the prismatoid base.
14 . The golf ball of claim 10 , wherein the prismatoid is further defined by an intersecting plane that is oblique to the prismatoid base.