Patent ID: 8448954

Claim:
A suspension for a vehicle, the suspension comprising: a base mountable to a frame of the vehicle, the base having at least three semi-circularly shaped grooves within a first common plane, the at least three semi-circularly shaped grooves having a first center point, the at least three semi-circularly shaped grooves having a radius r, the at least three semi-circularly shaped grooves defining a pivot axis perpendicular to the first common plane and located at the first center point; a hanger for mounting wheels so that the vehicle can roll on a surface, the hanger having at least three mounting recesses within a second common plane, the at least three mounting recesses defining a second center point wherein a distance between the at least three mounting recesses and the second center point is r, the second common plane of the hanger being disposed parallel to the first common plane of the base, the second center point positioned on the pivot axis; and at least three ball bearings seated within the at least three mounting recesses and traversable along the at least three semi-circularly shaped grooves when the hanger rotates about the pivot axis.