Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2006-07-25
2009-06-09
Edgar, Richard (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
Reexamination Certificate
active
07544043
ABSTRACT:
A turbine blade includes a shank portion and an airfoil portion with leading and trailing edges and a radially outer tip. An internal closed-loop cooling circuit is formed within the airfoil portion and includes at least one radial outflow passage and at least one radial inflow passage connected by at least one respective tip turn at the radially outer end of the airfoil portion. At least one tip turn is provided with a single turbulence-enhancement device on an underside of the radially outer tip, projecting into the tip turn.
REFERENCES:
patent: 2920865 (1960-01-01), Lombard
patent: 4992026 (1991-02-01), Ohtomo et al.
patent: 5536143 (1996-07-01), Jacala et al.
patent: 6474947 (2002-11-01), Yuri
patent: 6939102 (2005-09-01), Liang
Eastman John Alan
Ebacher Jon Allen
Findlay Matthew James
Edgar Richard
General Electric Company
Nixon & Vanderhye P.C.
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