Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2007-01-30
2007-01-30
Edgar, Richard A. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
C416S24100B
Reexamination Certificate
active
10990961
ABSTRACT:
The cooling system for the airfoil includes forward and aft cooling circuits supplied with a cooling medium. Both circuits include serpentine passages. A central rib divides the forward and aft cooling circuits and includes an opening adjacent the airfoil tip providing a jet of the cooling medium from the forward cooling circuit for impingement against the aft portion of the tip cap. The tip cap also includes a thermal barrier coating along an outside surface thereof as well as on the seat for the tip cap, thereby lowering the tip cap metal temperature and thermally induced stress.
REFERENCES:
patent: 5246340 (1993-09-01), Winstanley et al.
patent: 6224337 (2001-05-01), Lieland et al.
patent: 6461108 (2002-10-01), Lee et al.
Butkiewicz Jeffrey John
Hirt Philip Richard
Honkomp Mark Steven
Edgar Richard A.
Nixon & Vanderhye P.C.
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