Patent ID: 8197346

Claim:
A grease cover assembly for a constant velocity joint, comprising: a cover defining a bore; and a vent valve received within the bore, the vent valve including: a body disposed in the bore, the body sized so as to be axially movable in the bore and generally allowing fluid flow through the bore; a first umbrella portion associated with a side of said body, said first umbrella portion serving to define a first gap between a first surface of the grease cover and said first umbrella portion, wherein said first umbrella portion defines a first sealing lip defining said first gap between said first surface of said grease cover and said first umbrella portion; and a second umbrella portion associated with an opposite side of said body, said second umbrella portion serving to define a second gap between a second surface of the grease cover and said second umbrella portion, wherein said second umbrella portion defines a second sealing lip defining said second gap between said second surface of said grease cover and said second umbrella portion, said second sealing lip extending about a periphery of the second umbrella portion, said second sealing lip configured to selectively engage said second surface of said cover and wherein said second sealing lip is configured to substantially prevent a liquid from flowing through the bore when the second sealing lip is engaged with the second surface of the cover.