Abstract: An auger type snow blower assembly having an auger with two sets of rotating ribbon spokes which transfer snow from the auger to an impeller inlet located at the mid-portion of the auger assembly, the ribbon spokes terminating a substantial distance short of the center of the auger assembly whereby snow lying directly in the center of the path of the auger assembly may move directly to the impeller inlet without contact with the ribbons. Further, the ribbons revolve around a generally cone-shaped structure at the ends of the auger assembly whereby the ribbons and the stationary cones cooperate to impel snow entering the auger assembly toward the impeller inlet. The auger assembly further includes a bi-directional, variable speed hydraulic drive system for the ribbon system consisting of variable forward speeds and reverse speeds, the forward speeds including a low ribbon speed high torque speed, and a high ribbon speed low torque speed, together with pressure relief valves to avoid the use of shear pins.