Magnetic fluidic seal with improved pressure capacity

Seal for a joint or juncture – Process of dynamic sealing – Close proximity seal

Reexamination Certificate

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Details

C277S410000

Reexamination Certificate

active

10614461

ABSTRACT:
A magnetic assembly for a multistage magnetic fluid rotary seal has a shaft, an annular permanent magnet, at least one pole piece and a radial gap formed between the shaft and the pole piece. The shaft and the pole piece have a plurality of trapezoidal-shaped ridges in opposing, non-contacting relationship forming the radial gap. The trapezoidal-shaped ridges have a flat top portion facing the radial gap and tapered sides that diverge away from the top portion.

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