Patent ID: 6398223
Filing Date: 2002-06-04
Classification: F16J

Abstract:
A mechanical end face seal assembly to provide a fluid tight seal between a housing defining a bore and a rotatable shaft extending through the bore, said seal assembly comprising:an annular seal ring adapted to be connected to one of the housing and shaft; an annular seal ring adapted to be connected to the other of said housing and shaft; said rings each having an annular, generally radially directed seal face in facing relation to the seal face of the other ring to define a sealing interface therebetween, one of said rings being axially movable relative to the other; a resilient secondary seal between said axially movable ring and said one of said shaft and housing; said resilient secondary seal member comprising an elastomeric bellows in fluid tight sealing contact with said axially movable ring and in fluid-tight sealing relation to said one of said housing and shaft; a finger spring member interposed between said axially movable seal ring and said one of said housing and shaft; said finger spring member including a plurality of spring fingers adapted to be deformed on installation of said seal assembly between said housing and shaft to provide a force upon said axially movable ring to urge it toward the other of said rings; wherein said bellows includes a flange in fluid-tight sealing contact with said axially movable seal ring and a flange in fluid-tight sealing relation with said one of said shaft and housing and wherein said finger spring member includes a ferrule in overlapping engagement with said flange in fluid-tight sealing contact with said axially movable seal ring and a ferrule in overlapping engagement with said flange in fluid-tight sealing relation to said one of said shaft and housing.