Patent ID: 7946593

Claim:
A sealed system comprising: a hollow shaft having an outer surface, an inner surface, and an opening, the inner surface having a shot peened surface finish and defining a passage, and the opening extending between the outer surface and the inner surface; a bearing assembly mounted to the hollow shaft to receive lubricant from the opening of the hollow shaft; and a seal disposed within the passage of the hollow shaft to restrict lubricant flow to a portion of the passage in communication with the bearing assembly, the seal comprising: an axially extending ring section having a first end, a second end, and an inner surface, the ring section having a length from the first end to the second end and a substantially uniform outer diameter along an entirety of the length of the ring section; and a disk disposed between the ring section first and second ends substantially perpendicular to the ring section inner surface, the disk section disposed closer in proximity to the ring section first end than to the ring section second end and having a first side and a second side, the disk section first side disposed adjacent the opening in the hollow shaft and the ring section first end, wherein a portion of the ring section adjacent the disk first side has an inner diameter that is greater than an inner diameter of a portion of the ring section adjacent the disk second side.