Patent ID: 7614795

Claim:
A rolling bearing assembly comprising: an outer ring member; an inner ring member disposed radially inwardly of the outer ring member in a coaxial relation therewith via rolling elements; a hub wheel formed with a flange at one axial end thereof and having the inner ring member fitted on an outer periphery thereof; and a seal member for sealing being interposed between one axial end of the outer ring member and an inside surface of the flange axially opposing the one axial end of the outer ring member, the seal member including: a cylindrical core fitted on the one axial end of the outer ring member and axially extending from the one axial end toward the flange; and an annular lip portion secured to the core and formed from an elastic material, the annular lip extending substantially axially from the core to the inside surface of the flange, wherein the core includes: a greater diameter portion fitted on an outer surface of the outer ring member at the one end, and a stepped portion as a main body having a smaller diameter than the greater diameter portion, the stepped portion axially extending toward the flange.