Patent ID: 9505299
Filing Date: 2016-11-29
CPC Classification: A01C,A01M,B60K,B60R,B60Y

Claim Text:
1. A drive arrangement, comprising: a housing having first and second chambers; a shaft mounted within the housing for rotation about a rotation axis extending between the first and second chambers; a partition within the housing between the first and second chambers allowing fluid communication between the first and second chambers; and a disk mounted to the shaft for co-rotation about the rotation axis, the disk having an outer periphery and an annular portion with a face having entraining surface features, the face of the disk being spaced along the rotation axis from the partition by a gap clearance; wherein the gap clearance has an axial dimension selected such that rotation of the disk creates a negative pressure gradient drawing fluid from a direction of the first chamber through the gap clearance in a radial direction toward the rotation axis to an inner diameter of the annular portion of the disk, rotation of the disk thereafter moving the fluid, under centrifugal action, along the face of the disk in a radial direction away from the rotation axis; and wherein the outer periphery of the disk is spaced from the housing to permit fluid to pass, by centrifugal action, from the outer periphery of the disk toward the second chamber.