Patent ID: 8490993

Claim:
A self-tracking cart, comprising: a body defining an enclosure into and from which a secondary cart is receivable and removable; selectively rotatable first and second hitch assemblies; first and second motive elements; first and second steering assemblies to turn the first and second motive elements in opposite directions responsive to rotations of the first and second hitch assemblies; and a linkage, which is coupled to the first and second hitch assemblies to cause the first and second hitch assemblies to rotate jointly in opposing directions, the linkage being disposed for non-interference with the secondary cart during reception and removal thereof into and from the enclosure and the linkage comprising: vertically extensive end bars, each of which is coupled at a respective lower portion thereof to one of the first and second hitch assemblies and thereby jointly rotatable with the one of the first and second hitch assemblies; lateral members, each of which is coupled at a respective longitudinal end thereof to a respective upper portion of one of the vertically extensive end bars, the lateral members extending from the vertically extensive bars in opposite directions; and a connection member, which is pivotally coupled at opposed longitudinal ends thereof to respective distal ends of the lateral members.