Bearing assembly

Details Bearing assembly Bearing assembly

1987-12-16

1989-06-27

Hannon, Thomas R.

Bearings

Rotary bearing

Antifriction bearing

277 80, 277135, 384133, 384446, F16C 3382, F16J 1540

Patent

active

048424269

ABSTRACT:
A bearing assembly comprised of a housing, a shaft extending through the housing, a bearing disposed between the housing and the shaft and a seal disposed among the housing, the shaft and the bearing. The seal comprises an annular magnet, a pole piece affixed to the annular magnet and a ferrofluid injected into a gap between the pole piece and the shaft. Thus, a magnetic circuit for retaining the ferrofluid is formed by the seal, the bearing and the pole piece.

REFERENCES:
patent: 3620584 (1971-11-01), Rosensweig
patent: 4043616 (1977-08-01), Zimmer
patent: 4293137 (1981-10-01), Ezekial
patent: 4526380 (1985-07-01), Raj et al.
patent: 4531846 (1985-07-01), Raj
patent: 4628384 (1986-12-01), Raj et al.
patent: 4692826 (1987-09-01), Raj et al.

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