Seal for a joint or juncture – Seal between relatively movable parts – Close proximity seal
Reexamination Certificate
2005-02-15
2005-02-15
Pickard, Alison K. (Department: 3676)
Seal for a joint or juncture
Seal between relatively movable parts
Close proximity seal
C277S583000
Reexamination Certificate
active
06854736
ABSTRACT:
A seal assembly and a rotary machine in combination with the seal assembly are provided. The seal assembly includes a seal and a biasing device configured to produce a force for mechanically biasing the seal toward a first position relative to the rotatable portion. The seal is further responsive to pressurized fluid for creating a force opposed to the biasing force to cause movement of the seal toward a second position closer to the rotatable portion than the first position, thereby reducing flow leakage between the stationary portion and the rotatable portion. The pressurized fluid may be the working fluid produced by or used within the rotary machine.
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Pickard Alison K.
Siemens Westinghouse Power Corporation
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