Patent ID: 8888651

Claim:
A curvilinear universal joint system comprising: a first gear having portions defining a curvilinear hemispherical surface and further portions defining a flat surface opposite the hemispherical surface; a first shaft attached to the flat surface at an axis of rotation for the first gear, wherein a portion of the hemispherical surface distal the first shaft attachment point defines a single concave segment positioned symmetrically about a first gear rotation axis; a second gear having portions defining a second curvilinear hemispherical surface and further portions defining a second flat surface opposite the second hemispherical surface; and, a second shaft attached to the second flat surface at an axis of rotation for the second gear, wherein a portion of the hemispherical surface distal the second shaft attachment point defines a single convex segment projecting from the hemispherical surface with a substantially flat apical surface positioned symmetrically about the second gear rotation axis, and wherein the axis of rotation of the first gear is coplanar with the axis of rotation of the second gear.