Seal for a joint or juncture – Process of dynamic sealing – Close proximity seal
Reexamination Certificate
2005-05-31
2005-05-31
Pickard, Alison K. (Department: 3676)
Seal for a joint or juncture
Process of dynamic sealing
Close proximity seal
C277S410000
Reexamination Certificate
active
06899338
ABSTRACT:
A ferrofluid seal apparatus incorporating a multi-stage ferrofluid rotary seal adapted to provide a ferrofluid pressure-type seal about a shaft element extending between a first environment and a second environment, a first magnetic fluid disposed at one stage of the multi-stage rotary seal that faces the first environment, and a second magnetic fluid disposed at another stage of the multi-stage rotary seal that faces the second environment.
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Li Zhixin
Raj Kuldip
Ferrotec (USA) Corporation
Pickard Alison K.
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