Patent ID: 6921081

Claim:
A seal for arrangement between a radially inwardly facing outer boundary surface of an annular sealing gap and a radially outwardly facing inner boundary surface of the sealing gap comprising: a sealing ring having a sealing surface which bears sealingly against one of the boundary surfaces of the sealing gap and having a pressure surface which on the side of the sealing ring in radially opposite relationship to the sealing surface forms with the other of the boundary surfaces of the sealing gap an intermediate space which is wedge-shaped in cross-section, and a pressure ring which is biased by a biasing means at least at times into the intermediate space against the other of the boundary surfaces of the sealing gap and the pressure surface for pressing the sealing surface against the one boundary surface of the sealing gap, wherein the pressure ring has an outer operative surface in the form of a radially outwardly directed circular-cylindrical peripheral surface which is biased against the other of the boundary surfaces of the sealing gap, and an inner operative surface in the form of a radially inwardly directed circular-conical peripheral surface which is biased against the pressure surface of the sealing ring, which is in the form of a complementary circular-conical peripheral surface, and also a concave biasing surface in the form of an axially directed annular surface against which the biasing means is biased, characterized in that the sealing surface of the sealing ring has two radially projecting sealing lips which enclose between them a groove in the sealing ring.