Ferrofluid exclusion seal and method of assembly

Details Ferrofluid exclusion seal and method of assembly Ferrofluid exclusion seal and method of assembly

1985-09-25

1989-04-04

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

29451, 277 11, 277 80, 277135, 277194, 277198, 277207R, 277207A, 384133, 384477, B23P 1100, F16J 1540, F16J 1554

Patent

active

048179647

ABSTRACT:
A ferrofluid seal apparatus and a method of assembling the seal apparatus, the seal apparatus comprising a housing, an annular permanent magnet and at least one annular pole-piece element, and a sealing ring to secure and seal the permanent magnet and the pole-piece element within the housing, the sealing ring having an inwardly extending shoulder at one radial end, to retain the permanent magnet and pole piece within the sealing ring. The sealing ring is composed of a deformable material and retains, by compressive force, the permanent magnet and pole piece, by press-fitting the sealing ring into the annular space between the outer surface of the permanent magnet and the annular pole piece and the inner surface of the housing, to secure the permanent magnet and pole piece within the housing.

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