Seal for a magnetizable shaft

Details Seal for a magnetizable shaft Seal for a magnetizable shaft

1989-01-30

1990-07-10

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277135, 277153, F16S 1556

Patent

active

049402480

ABSTRACT:
A seal for a magnetizable shaft includes a sealing lip of polymeric material and a preliminary seal on the side facing away from the sealed space. The preliminary seal consists of a ring magnet which surrounds the shaft leaving a gap. A ferrofluid is disposed in this gap.

REFERENCES:
patent: 3306621 (1967-02-01), Fisher
patent: 3659306 (1972-05-01), Stoltze et al.
patent: 3814443 (1974-06-01), Steigerwald
patent: 4171818 (1979-10-01), Moskowitz et al.
patent: 4407518 (1983-10-01), Moskowitz et al.
patent: 4481869 (1984-11-01), Garlapaty
patent: 4486026 (1984-12-01), Furumuru et al.
patent: 4598914 (1986-07-01), Furumura et al.
patent: 4844480 (1989-07-01), Gralka

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