Patent ID: 11897283
Assignee: AKTIEBOLAGET SKF
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 8:
9. A bearing unit having an axis of rotation (X), comprising:
a flanged first radially inner, rotatable, ring;
a radially external, stationary, ring;
a second radially inner ring, rotatable, mounted on and integral with the flanged first radially inner ring;
a plurality of rolling bodies interposed between the radially outer ring and both the first and second radially inner rings; and
a sealing device comprising:
a stationary part comprising:
a first metal screen comprising:
an annular shaped portion; and
a cylindrical portion, wherein the cylindrical portion is radially external with respect to the annular shaped portion;

an elastomer coating comprising:
an annular shaped elastomeric portion;
a cylindrical elastomeric portion;
a contacting lip radially internal with respect to the cylindrical elastomeric portion and axially external with respect to the annular shape elastomeric portion; and
a first non-contacting lip extending radially and internally from the cylindrical elastomeric portion,

wherein the elastomer coating is co-moulded on the first metal screen in a radially external position with respect to the first metal screen,

a rotatable part comprising:
a second metal screen comprising:
a first portion extending radially; and
a radially outer wing,

wherein the contacting lip is configured to make sliding contact with the second metal screen,
the radially outer wing and the first non-contacting lip define a first radial labyrinth seal,
a first pre-chamber is defined between the first metal screen, the annular shaped elastomeric portion, and the contacting lip, and
a radially outer surface of the radially outer wing of the second metal screen is radially flush with an outer radial surface of the radially outer ring.