Sealing device governed by centrifugal force

A device for sealing off an annular slot between an outer race ring (1) and an inner race ring (2) of a bearing assembly which are rotatable relative to each other, whereby an annular elastic sealing lip (4) is arranged on a sealing portion (5), which is connected to the inner race (2) via a flexible sealing portion (6), whereby the lip, when no rotation is at hand, contacts an opposed annular sealing surface (7) mounted on said outer race ring (1) of said bearing with a force, which has a component directed radially outwards relative to the rotational axis, and the center of gravity (9) of said sealing portion is axially displaced relative to the flexible sealing portion (7) thus that a torsional moment created by the centrifugal force tends to bend the sealing portion with the lip away from its contact with the opposed sealing surface, characterized therein that said sealing portion (5) and the opposed sealing surface (7) in a sectional plane incorporating the rotational axis of the rotatable member have profiles of such shapes and such mutual positions, that, when the sealing portion with the lip is bent by the centrifugal force, the lip is displaced in a direction, which has a component directed radially outwards relative to the rotational axis.