Bearing unit with sealing device

A bearing unit comprising:

• a radially outer ring comprising:
• an axial annular end edge;
• and
• an annular groove formed in the axial annular end edge;
• a radially inner ring;
• and
• a sealing device interposed between the radially outer ring and the radially inner ring, the sealing device comprising:
• a first annular screen joined to the radially outer ring;
• a first sealing gasket supported by the first annular screen and comprising an elastomeric material;
• a second annular screen joined to the radially inner ring and facing the first annular screen;
• and
• a second sealing gasket made of an elastomeric material, the second sealing gasket being supported by the second annular screen, the second sealing gasket comprising:
• at least one elastically deformable first non-contacting annular lip projecting from a radially outer peripheral edge of the second annular screen, the first non-contacting annular lip comprising:
• a first portion elastically flexible and projecting obliquely from the radially outer peripheral edge of the second annular screen with respect to an axis of symmetry of the bearing unit;
• a second portion tapered toward a free end of the first non-contacting annular lip distal to the first portion, the second portion comprising a radially inner frustoconical surface;
• and
• a spur integral with the second portion at the free end;
• wherein the first sealing gasket and the second sealing gasket define a tortuous path therebetween, the first non-contacting annular lip being contained at least partially within the annular groove of the radially outer ring in an un-deformed configuration;
• and
• the first non-contacting annular lip is configured to flex in a radially and axially inward direction in the annular groove of the radially outer ring and contact the annular groove in a deformed configuration.

A sealing device comprising:

• a first annular screen;
• a first sealing gasket made of an elastomeric material and comprising a plurality of first non-contacting lips, the first sealing gasket being supported by the first annular screen;
• a second annular screen facing the first annular screen;
• and
• a second sealing gasket made of an elastomeric material, the second sealing gasket being supported by the second annular screen, the second sealing gasket comprising:
• a plurality of second non-contacting lips;
• and
• at least one elastically deformable third non-contacting annular lip projecting from a radially outer peripheral edge of the second annular screen, the elastically deformable third non-contacting annular lip comprising:
• a first portion elastically flexible and projecting from the radially outer peripheral edge of the second annular screen;
• a second portion tapered toward a free end of the first non-contacting annular lip distal to the first portion, the second portion comprising a radially inner frustoconical surface;
• and
• a spur integral with the second portion at the free end;
• wherein the at least one third non-contacting annular lip is configured to elastically deform and form a contacting seal with an annular groove of an outer ring of a bearing unit.