Patent ID: 9587743
Date: 2017-03-07
CPC Classifications: F16J

Claim:
1. A labyrinth seal including a stator and a non-contacting rotor, and including at least one annular elastomeric seal, and at least one interface passage disposed between the confronting surfaces of the stator and rotor, the at least one interface passage including a radially-outermost annular interface passage between an annular, outermost, radially-extending projection of the stator and an annular rearwardly-extending distal projection of the rotor that includes an annular inner surface that overlaps the radially-extending projection of the stator, the radially-outermost annular interface passage tapering outwardly and rearwardly at an acute angle relative to an axial reference line; wherein the confronting surfaces of the stator and rotor define two radially-disposed exclusion chambers including a radially-outside exclusion chamber and a radially-inside exclusion chamber, the radially-outside exclusion chamber defined by a first radially-extending annular surface of the rotor, a first radially-extending annular surface of the stator spaced axially from the first radially-extending annular surface of the rotor, the annular rearwardly-extending distal projection of the rotor, and an annular rearwardly-extending, radially-inboard intermediate projection of the rotor, and the radially-inside exclusion chamber defined in part by the first radially-extending annular surface of the rotor and an annular intermediate projection of the stator disposed radially inwardly from the intermediate projection of the rotor.