Bearing equipment for vacuum devices

Details Bearing equipment for vacuum devices Bearing equipment for vacuum devices

1989-04-27

1990-09-11

Footland, Lenard A.

Bearings

Rotary bearing

Plain bearing

384245, F16C 1710

Patent

active

049557319

ABSTRACT:
A bearing for a vacuum device having an annular permanent magnet disposed about a rotatable shaft which has one end exposed to low pressure and the other end exposed to atmospheric pressure in which the rotatable shaft has a spherical member formed on the high pressure end for mating with a concave bearing surface having a magnetic fluid interposed therebetween and the rotatable shaft has a plurality of grooves formed thereon for aligning with a plurality of rings formed on an annular pole piece in which a magnetic fluid is disposed between the rings and grooves, which can be formed on the shaft, for providing a high pressure seal.

REFERENCES:
patent: 2316920 (1943-04-01), Weber
patent: 4671679 (1987-06-01), Heshmat
patent: 4798476 (1989-01-01), Sakatani et al.
patent: 4842426 (1989-06-01), Furumura et al.

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