Shaft assembly having improved seal

摘要

A shaft assembly includes a housing having a bore formed therein. A shaft is disposed rotatably in the housing and within the bore. A seal assembly extends between the shaft and a circumferential surface of the bore and includes a first annular seal member rotationally fixed to one of the shaft and the housing and extending therefrom to engage the other of the shaft and the housing. One or more annular seal members extend at least partially between the bore and the shaft to form a labyrinth between areas external and internal to the shaft assembly.