Abstract: A radial shaft sealing ring, especially for use together with a CO2 containing pressure medium, comprises a membrane body (1) and a supporting body (2). A centering element (5) having a radially outer edge (6) is disposed on the supporting body (2) and is not covered by the membrane body (1). The membrane body (1), on its radially inner end, comprises a tilted sealing lip (11) which faces away from the supporting body (2). The supporting body (2) has an axial bore for the shaft (8) and, opposite the sealing lip (11), a supporting face (13) which slopes towards the wall (12) of the bore. The invention is characterized in that the centering element (5), when the radial shaft sealing ring is fitted in a bearing house (4), can be contacted with the interior of the bearing housing (4) in a press fit and that the angle (?) between the supporting face (13) and the wall (12) of the bore of the supporting body (2) ranges between 45° and 55° in a central plane which includes the axis of the radial shaft sealing ring.

Abstract: On a radial shaft seal for sealing a closed internal space (20), filled with a fluid medium, on a rotating shaft (12) against the external atmosphere (30), comprising at least one membrane body (4) displaying a sealing membrane (8) with a sealing lip (9) that can be positioned in sealing fashion on the shaft (12) and is set obliquely to the internal space (20), where the side of the sealing membrane facing away from the internal space (20) is supported by a supporting element (3), the edge (3r) of which facing the shaft forms an annular gap with the latter, it is envisaged that at least the edge area (3r) of the supporting element (3) adjacent to the shaft (12) is made of a non-elastic plastic material, and that the width d of the annular gap (14) between the edge (3r) of the supporting element (3) and the shaft (12) is dimensioned in such a way that a pressure of 20 hPa at most can be achieved in the internal space (20) when pumping out the air from the internal space (20) against the air flowing in through

Abstract: In a known rotary shaft seal with two sealing lips, a first diaphragm body (20) with a first sealing lip (21) is mounted on a support element (22) and inserted in a second diaphragm body (23) with a second sealing lip (27) that rests against a pressure mount (24) and is mounted in the bearing mount (1). The object of the invention is to prevent the pressure medium from passing through the gap (26) between the two diaphragm bodies, which is open towards the pressure side, and ensure that the first diaphragm body can be displaced in the second along this gap. According to the invention, the first diaphragm body (2) is mounted on a support element (3) and inserted from the unpressurized side into the second diaphragm body (4), which serves to mount the seal in the bearing mount (1), reaches around a pressure mount (5) on the unpressurized side and secures it against axial movement.