Shaft sealing device

Details Shaft sealing device Shaft sealing device

1997-06-19

1999-04-20

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Diverse and distinct dynamic seals

277424, 277560, 277562, F01D 1102, F16J 1540, F16J 1532

Patent

active

058950524

ABSTRACT:
A device for sealing the annular gap between a housing and a shaft supported in the housing. The device comprises an inner ring, an outer ring, and an elastomeric sealing member joined to the outer ring. The sealing member has three sealing lips, of which only the first abuts, under prestressing, against the inner ring. The two other sealing lips are configured in such a way that, between their outer ends and the sections of the inner ring lying opposite to their outer ends, gaps are formed which act as a contact-free sealing. In addition, a gap may be provided between a radially extending annular disk portion of the sealing member and an outer flanged section of the inner ring axially opposite the annular disk portion. That gap and the gaps at the ends of the second and third sealing lips form a labyrinth seal.

REFERENCES:
patent: 4181312 (1980-01-01), Douglas
patent: 5201529 (1993-04-01), Heinzen
patent: 5350181 (1994-09-01), Horve
patent: 5553866 (1996-09-01), Heinzen
patent: 5611548 (1997-03-01), Dahlhaus

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