Self-cooling ferrfluid seal

Details Self-cooling ferrfluid seal Self-cooling ferrfluid seal

2005-08-22

2008-03-04

Pickard, Alison K (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Close proximity seal

C277S930000

Reexamination Certificate

active

07338049

ABSTRACT:
A self-cooling ferrofluid seal includes a housing having a housing case and an external pole piece integrally connected to the housing case where the housing case has a plurality of heat dissipating surfaces, a magnetic circuit within the housing formed in conjunction with the external pole piece, a rotatable shaft having one or more fan blades where the rotatable shaft is coaxially aligned within the housing, and a quantity of magnetic fluid between the rotatable shaft and the external pole piece forming a ferrofluid seal.

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