Patent ID: 8864616

Claim:
A power transfer unit for a vehicle, comprising: a first shaft configured to receive an input torque from a first vehicle component; a second shaft configured to selectively receive the torque from the first shaft and transmit the torque to a second vehicle component, the second shaft having a first end and a second end; an engaging mechanism configured to operate in a first mode and a second mode, when in the first mode the engaging mechanism selectively couples the second shaft to the first shaft, when in the second mode the second shaft is decoupled from the first shaft; a housing configured to enclose at least a portion of the power transfer unit; and a seal system having a first seal and a second seal, the first seal being disposed between the housing and the first end of the second shaft, the second seal being disposed between the housing and the second end of the second shaft, wherein the first seal includes a first support member, a first biasing member, and a first lip member having a first portion that is coupled to the first support member and a second portion that is biased by the first biasing member, and the first seal includes a second support member, a second biasing member, and a second lip member having a first portion that is coupled to the second support member and a second portion that is biased by the second biasing member and wherein the first support member is connected to the second support member independently of the housing, first shaft and second shaft.