US 5,370,404 AGranted

Radial lip seal with interposed bearing

AssigneeFirma Carl Freudenberg

InventorsNorbert Klein, Gerhard Freiwald

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Abstract

A sealing arrangement for sealing a shaft passing through a bore in a wall is disclosed. The sealing arrangement comprises a radial shaft sealing ring which surrounds the shaft with radial pre-tension, forming a seal on the circumference of the shaft via at least one sealing lip made of an elastomeric material. The sealing lip is affixed on a first shank of an essentially L-shaped first reinforcement ring which faces radially inward. A second shank extends in an axial direction, is mantled by elastomeric material at least in the portion which extends axially, and touches the wall with radial pre-tension, forming a seal. In the radial direction, between the shaft and the second shank, is arranged a rolling bearing, which contacts the shaft via its inner ring and contacts the mantled partial region of the second shank via its outside ring.

Claims9

Dependent claims

A sealing arrangement for sealing a shaft passing through a bore in a wall comprising:

a radial shaft sealing ring surrounding the shaft and sealed to the shaft with radial pre-tension, said shaft sealing ring thereby forming a seal on the circumference of said shaft, said shaft sealing ring comprising at least one resilient sealing lip sealing against said shaft;
a first reinforcement ring, said sealing lip being affixed on a first shank of said first reinforcement ring, said first shank projecting radially inward, said first reinforcement ring further comprising a second shank projecting in an axial direction, said second shank being surrounded by a resilient mantling at an axial end, said mantling contacting said wall with radial pre-tension, thereby forming a seal;
and
a rolling bearing arranged between the shaft and the second shank, an inner ring of said rolling bearing contacting said shaft and an outer ring of said rolling bearing contacting said mantling;
and
a second reinforcement ring comprising a partial region surrounding said mantling, said partial region surrounding said mantling on the side of the mantling facing said wall.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/032,897Filed 18 Mar 1993
Priority: DE 420995327 Mar 1992
Granted: 6 Dec 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16J 15/3224
With at least one lip: capable of accommodating changes in distances or misalignment between the surfaces, e.g. able to compensate for defaults of…
F16C 27/066
By means of parts of rubber or like materials: ball or roller bearings
F16C 33/768
Of ball or roller bearings: between relatively stationary parts, i.e. static seals
F16C 33/7886
With a diaphragm, disc, or ring, with or without resilient members: mounted outside the gap between the inner and outer races, e.g. sealing rings…