Patent ID: 9033345
Filing Date: 2015-05-19
Classification: F16J

Abstract:
1. A radial shaft seal for separating two media comprising: two radial shaft sealing rings each including a bottom surface and a sealing lip, the sealing rings being configured to be disposed on a shaft to be sealed with the bottom surfaces facing one another and the sealing lips axially opposed to one another with a space between the sealing lips including a vent, each of the sealing rings including a stiffening element, each of the bottom surfaces including cut-outs in a radial direction that are disposed in regular intervals about a circumference of each of the bottom surfaces, wherein the bottom surface of one of the sealing rings differs from the bottom surface of the other sealing ring in that the bottom surface of the one of the sealing rings includes clamping cams configured to grip behind a radially inwardly protruding inner rim of the bottom surface of the other sealing ring so as to join the sealing rings in a form-locking, rear-engaging position relative to each other with the bottom surfaces of the sealing rings being in an abutting relationship and the space being ventilated by the cut-outs, and wherein the sealing lips include oppositely directed return flow grooves or a bidirectional helix so as to allow leakage fluid to be returned to the space between the sealing lips in response to a corresponding direction of rotation of the shaft.