Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Reexamination Certificate
2005-10-06
2010-06-29
Omgba, Essama (Department: 3726)
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
C029S889100, C029S889210, C029S402080, C029S402090
Reexamination Certificate
active
07743497
ABSTRACT:
Stator blade counts of an upper compressor casing for adjacent stages S0and S1are changed in the field to provide additional stator vanes and hence an increased vane count. Particularly, the upper casing half of the compressor is removed from the lower casing half. The original stator vanes on opposite axial sides of the first stage buckets are removed from the upper casing half and replaced by an additional sets of stator vanes providing a non-uniform vane spacing as between the upper and lower halves of the compressor as well as between axially adjacent stages S0and S1. The unequal vane counts reduce the vibratory response of the rotating blades between stages S0and S1.
REFERENCES:
patent: 3006603 (1961-10-01), Caruso et al.
patent: 3194487 (1965-07-01), Tyler et al.
patent: 3849023 (1974-11-01), Klompas
patent: 3918832 (1975-11-01), Shuttleworth et al.
patent: 4135857 (1979-01-01), Pannone et al.
patent: 4193568 (1980-03-01), Heuvel
patent: 4967550 (1990-11-01), Acton et al.
patent: 5141391 (1992-08-01), Acton et al.
patent: 5340271 (1994-08-01), Freeman et al.
patent: 5690469 (1997-11-01), Deal et al.
patent: 5765993 (1998-06-01), Weiss
patent: 6416278 (2002-07-01), Caddell et al.
patent: 6543997 (2003-04-01), Donnaruma et al.
patent: 6752589 (2004-06-01), Vogan et al.
patent: 6869270 (2005-03-01), Bunker et al.
patent: 6905303 (2005-06-01), Liu et al.
patent: 6984108 (2006-01-01), Anderson et al.
patent: 7097420 (2006-08-01), Cormier et al.
patent: 7234914 (2007-06-01), Usab et al.
patent: 7434313 (2008-10-01), Dasilva et al.
patent: 7458219 (2008-12-01), Herzog et al.
patent: 2005/0191177 (2005-09-01), Anderson et al.
patent: 2006/0045772 (2006-03-01), Slovisky et al.
patent: 2006/0198726 (2006-09-01), Schirle et al.
patent: 2007/0077148 (2007-04-01), Bird
patent: 2007/0079506 (2007-04-01), Gautreau et al.
patent: 2007/0231155 (2007-10-01), Burdgick et al.
patent: 2008/0282541 (2008-11-01), Anderson et al.
patent: 1576611 (2005-02-01), None
patent: 1772596 (2007-04-01), None
patent: 2007100700 (2007-04-01), None
Chinese Office Action dated Apr. 10, 2009.
Gautreau James C.
Wassynger Stephen P.
General Electric Company
Nixon & Vanderhye P.C.
Omgba Essama
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