Magnetic disc liquid supporting

Details Magnetic disc liquid supporting Magnetic disc liquid supporting

1984-01-31

1985-07-02

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

335306, F16J 1540

Patent

active

045263817

ABSTRACT:
A pair of disc permanent magnets axially magnetized are fastened together in backing magnetic relationship with adjacent end faces of the same magnetic polarity and fastened to a housing. A ring of magnetic fluid around the inside edges of the permanent magnet discs engage a rotatable shaft and coact with the disc to seal the region between the shaft and housing. A bearing comprises a number of cascaded thin discs surrounding a nonmagnetic shaft. Nonmagnetic discs of thickness less than that of each magnetic disc may separate adjacent magnetic discs. Pole pieces of thickness less than that of each magnetic disc may separate adjacent magnetic discs and terminate in opposed pole faces adjacent the shaft defining a gap therebetween of gap width less than the thickness of each permanent magnet disc.

REFERENCES:
patent: 3354329 (1967-11-01), Reich
patent: 3614691 (1971-10-01), Miyata
patent: 3706059 (1972-12-01), Theyse
patent: 4293137 (1981-10-01), Ezekiel
patent: 4451811 (1984-05-01), Hoffman

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