Magnetic liquid shaft sealing

Details Magnetic liquid shaft sealing Magnetic liquid shaft sealing

1978-12-11

1981-10-06

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

3081871, 3081872, 335303, F16J 1516, F16J 1540

Patent

active

042931371

ABSTRACT:
A magnetic liquid seal comprises a single axially magnetized permanent magnet in the shape of a flat washer having magnetic liquid captured on the inside or outside diameters, or both. Leakproof sealing is achieved between either the outside diameter and an external housing or between the inner diameter and an external shaft.

REFERENCES:
patent: 2557140 (1951-06-01), Razdowitz
patent: 2974981 (1961-03-01), Vervest et al.
patent: 3612549 (1971-10-01), Berkowitz
patent: 3620584 (1971-11-01), Rosensweig
patent: 3740060 (1973-06-01), Miskolczy
patent: 3848879 (1974-11-01), Hudgins
patent: 3897288 (1975-07-01), Fayling
patent: 4171818 (1979-10-01), Moskowitz et al.
Improvements Relating to Shaft and Like Seals DE-AL 2628 831 (Machinenfabrik Ausburg-Nurnberg AG).
H. Reinboth "Tehnologie und Anwendung Magnetischer Werkstoffe" 1970, Veb Verlag Technik, Berlin, p. 351.

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