Shaft sealing ring

Details Shaft sealing ring Shaft sealing ring

2005-07-26

2005-07-26

Pickard, Alison (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S559000

Reexamination Certificate

active

06921080

ABSTRACT:
A sealing ring for a shaft (3), characterized by a sealing lip (1) made of an elastomer material is flexionally dimensioned with a flexional elasticity which is sufficient for pressing a sealing section (10) of the sealing lip (1) against the surface of the shaft (3). The sealing section (11) of the sealing lip (1) is disposed with a cylindrical part of a given length (L) on the periphery of the shaft (3). The sealing lip (1) is provided with a thread (5) at least along the above-mentioned length on the shaft side, whereby a discharged medium is transported back to the sealing area (M) when the shaft (3) is rotated. By dimensioning accordingly, it is possible to dispense with an additional spring for pressing a sealing lip (1) against the shaft (3). The thread (5) is also sealed off from the surrounding area (U) in order to prevent the medium to be sealed from flowing out when the shaft (3) is not in operation.

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patent: 1211444 (2002-06-01), None

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