Lip sealing ring

Details Lip sealing ring Lip sealing ring

2005-07-26

2005-07-26

Peavey, Enoch (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S549000, C277S562000, C277S563000, C277S570000

Reexamination Certificate

active

06921082

ABSTRACT:
A lip sealing ring for a relatively movable machine element (1), including a flexible sealing lip (2) made of polymeric material which adjacently encloses the machine element (1) in the region of a sealing gap (3) under elastic prestressing, the sealing gap (3) being penetrated in the longitudinal direction (5) in at least one circumferential location by a spiral stage (4); the spiral stage (4) being bounded by a screw thread-shaped groove (6) in the sealing lip and by the surface (7) of the machine element (1) to be sealed, facing the groove; and the groove (6) connecting the space (8) to be sealed to the surroundings (9). Sealing gap (3) is closed by a thixotropic medium (10) in the region of groove (6) bounding the spiral stage (4).

REFERENCES:
patent: 4770424 (1988-09-01), Otto
patent: 5236606 (1993-08-01), Rangel
patent: 5615894 (1997-04-01), vom Schemm
patent: 5755444 (1998-05-01), Carnis et al.
patent: 6336638 (2002-01-01), Guth et al.
patent: 6520507 (2003-02-01), Pataille et al.
patent: 196 14 828 (1996-10-01), None

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