Patent ID: 6942303

Claim:
A wheel assembly, comprising: a stationary central shaft having first and second axially opposing ends securable to first and second spaced portions of a frame; a wheel including an inner hub around the shaft, a circular outer rim around and in a radially spaced position relative to the hub, and at least a first alignment structure having at least one piece with an inner portion secured to the hub and an outer portion secured to the rim to secure the rim in the radially spaced position relative to the hub, so that the hub, rim, and alignment structure of the wheel revolve as a unit around an axially-extending axis of the shaft; a spinning component bearing having first and second races, and roller members between the races to allow the races to rotate relative to one another, the first race revolving with the wheel; and a spinning component mounted to the second race in a location to be at least partially visible from a position external to the wheel, revolving about the axis and, due to rotation of the races relative to one another, being at least partially rotatable relative to the wheel in the same direction as the wheel relative to the shaft.