Patent ID: 6354970
Filing Date: 2002-03-12
Classification: A63B

Abstract:
A curve ball comprising a sphere having a non-perforated outer surface, said sphere comprising a pair of hemispheres joined at an equator and having a pole axis extending through the center of said sphere perpendicularly to the plane of said equator, each of said hemispheres being solid and non-perforated such that no air can enter said ball, the entire outer surface of said ball being non-perforated, one and only one of said hemispheres having at least one arcuate groove, said ball curving toward said groove when thrown in a direction along and coincident with said plane of said equator and spinning about said pole axis, wherein said groove extends along a smooth interrupted arc along a plane parallel to said plane of said equator such that at initial release of said ball thrown along said thrown direction and spinning about said pole axis, air flows in a smooth uninterrupted channeled flow path along said groove.