Seal for use between relatively rotating members

In a duct system for supplying compressed air to a tire on a commercial vehicle wheel from a first, non-rotary member to a second member which rotates with the wheel, the first member having a hub with spaced bearings on the hub supporting the second member to permit rotation of the second member, the improvement comprising a sealing arrangement disposed between the bearings and positioned between the first and second members to cooperate in the duct system for supply of compressed air to the tire, said sealing arrangement including a cylindrical outer receiving sleeve adapted to be fitted in said second member, a race ring adapted to be fitted on said first member between said bearings and within said sleeve, said race ring having an outer cylindrical surface facing the cylindrical sleeve to form an annular space between the race ring and said sleeve, and a pair of annular seal means coaxially arranged and axially spaced from one another between said race ring and said sleeve, said seal means including means providing rotational, sealed engagement between said race ring and said sleeve to define and seal said annular space therebetween, said race ring being relatively thick compared to said outer receiving sleeve, said race ring being force fit on said hub, said cylindrical receiving sleeve being mounted within an inner surface of said second member on said outer cylindrical surface of said race ring such that upon assembly said receiving sleeve is force fit in said inner surface of said second member, said seal means including portions in contact with the inner surface of the cylindrical receiving sleeve and the outer cylindrical surface of the race ring to provide sealing engagement therebetween.