Rotary kinetic fluid motors or pumps – Method of operation
Reexamination Certificate
2006-07-05
2008-11-11
Nguyen, Ninh H (Department: 3745)
Rotary kinetic fluid motors or pumps
Method of operation
C415S199500, C415S174400, C415S177000
Reexamination Certificate
active
07448843
ABSTRACT:
A gas turbine engine is provided with a seal disk that rotates in a closely spaced relationship to a stationary vane. The stationary vane is provided with an abradable tip. The seal disk is provided with alternating portions of a relatively insulating material and a relatively abrasive material. The insulating material can assist the seal disk in resisting thermal expansion. The abrasive material abrades the abradable tip of the stationary vane, ensuring a close, rotating fit.
REFERENCES:
patent: 4738586 (1988-04-01), Harter
patent: 5603603 (1997-02-01), Benoit et al.
patent: 6358002 (2002-03-01), Good et al.
patent: 6720087 (2004-04-01), Fried et al.
Carlson & Gaskey & Olds
Nguyen Ninh H
United Technologies Corporation
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