Sealing assembly with a magnetic liquid

Details Sealing assembly with a magnetic liquid Sealing assembly with a magnetic liquid

1989-07-18

1992-06-02

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277135, F16J 1544

Patent

active

051181185

ABSTRACT:
A sealing assembly forming a seal using a magnetic liquid around a rotatable shaft, comprising an armature for conducting a magnetic field, the armature having a free end adjacent the shaft to form an annular sealing gap; a quantitiy of magnetic liquid contained in the sealing gap by the magnetic field; and at least one covering member mounted on the assembly on one side of the gap to cooperatively define a space with the shaft for containing an amount of fluid at least two times the volume of the gap.

REFERENCES:
patent: 2996162 (1961-08-01), Lehde
patent: 4171818 (1979-10-01), Moskowitz et al.
patent: 4533265 (1985-08-01), Woodbridge
patent: 4673997 (1987-06-01), Gowda et al.
patent: 4761082 (1988-08-01), Gabelli
patent: 4765756 (1988-08-01), Gabelli
patent: 4817964 (1989-04-01), Black, Jr.

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