Patent ID: 7721875

Claim:
A cargo power drive unit comprising: (a) a housing; (b) a shaft rotatably mounted in the housing, the shaft having a longitudinal axis, a first end, and a first spindle outwardly extending from the first end and being offset from the longitudinal axis; and (c) a first lift roller having a hub with a first center axis, a first opening that is radially offset from the first center axis, and an outer rim rotatably disposed on the hub, the first spindle being non-rotatably received in the first opening; (d) wherein the spindle is offset from the longitudinal axis in a first direction and the first opening is offset from the first center axis in a second direction that is substantially opposite from the first direction, and wherein the offset of the spindle and the offset of the first opening remain in substantially opposite directions for all rotational positions of the shaft as the shaft rotates in the housing.