Cassette seal

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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Details

277 25, 277 35, 277 67, 277152, F16J 1516

Patent

active

053080874

ABSTRACT:
A cassette seal, comprising an outer ring and an inner ring of an opposing angular profile, which mutually surround an annular space having an imaginary concentric axis. The outer ring is provided with at least one sealing lip abutting on the inner ring. Also a gap connection is provided between the annular space and the space to be sealed off. This gap connection is limited on one side by a flange connected to the inner ring 2. With respect to its cross-section, the gap connection is widened on the side turned away from the flange in segmental cut-outs of the outer ring that are uniformly distributed over the circumference. These segmental cut-outs constitute ducts connecting the annular space and the space to be sealed off. These ducts are limited in the axial direction on the side facing the flange by a conically inclined run-off surface. This run-off surface constitutes a part of a diameter that concentrically surrounds the axis and is extended in a funnel shape in the direction of the annular space. The run-off surface completely surrounds the flange in the axial direction and at least partially surrounds the sealing lip.

REFERENCES:
patent: 3510138 (1970-05-01), Bowen et al.
patent: 4432557 (1984-02-01), Drucktenhengst
patent: 4484752 (1984-11-01), Bentley
patent: 4721312 (1988-01-01), Hornberger
patent: 4746128 (1988-05-01), Freiwald
patent: 4856794 (1989-08-01), Boyers et al.

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