Patent ID: 7628541

Claim:
Sealing device configured for mounting to a wheel hub unit connected to a differential device, and provided with a contact rolling bearing, the sealing device comprising: a first shield configured for being shrink-fit onto an inner race of the bearing, an encoder integral with the first shield to generate a signal for reading kinematic parameters of functioning of the wheel hub unit, and a second shield configured for being shrink-fit onto an outer race of the bearing in a position counter-facing and external to the first shield, and wherein the second shield is provided with a window hermetically sealed by a membrane, and is suitable for being engaged by a reading sensor reading a signal generated by the encoder; wherein the sealing device comprises a first static sealing element integral with the second shield and extending interposed between the second shield and a containing box configured to extend from the differential as far as the wheel hub unit to define a watertight chamber for a reading surface of the sensor at least isolated from part of the differential, wherein said first static sealing element comprises at least one sealing lip on a first axial side of said sensor extending in a substantially axial direction from the second shield and arranged in contact with a a complementary shoulder of said box; a second sealing element on a second axial side of said sensor and interposed between the second shield and the box projecting radially outward and spaced radially outward from said first sealing element to close said watertight chamber from the side opposite the differential.