Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Reexamination Certificate
2008-05-20
2008-05-20
Kershteyn, Igor (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
C416S22300B, C416S228000, C416S238000, C416S242000, C416SDIG004
Reexamination Certificate
active
11100752
ABSTRACT:
A turbofan includes a row of fan blades extending from a supporting disk inside an annular casing. Each blade includes an airfoil having opposite pressure and suction sides extending radially in span between a root and tip and axially in chord between leading and trailing edges. Adjacent airfoils define corresponding flow passages therebetween for pressurizing air. Each airfoil includes stagger increasing between the root and tip, and the flow passage has a mouth between the airfoil leading edge and the suction side of an adjacent airfoil and converges to a throat aft from the mouth. The row includes no more than twenty fan blades having low tip solidity for increasing the width of the passage throat.
REFERENCES:
patent: 4358246 (1982-11-01), Hanson et al.
patent: 4971520 (1990-11-01), Van Houten
patent: 5167489 (1992-12-01), Wadia et al.
patent: 5169288 (1992-12-01), Gliebe et al.
patent: 5273400 (1993-12-01), Amr
patent: 5478199 (1995-12-01), Gliebe
patent: 5584660 (1996-12-01), Carter et al.
patent: 5642985 (1997-07-01), Spear et al.
patent: 5735673 (1998-04-01), Matheny et al.
patent: 5769607 (1998-06-01), Neely et al.
patent: 5810555 (1998-09-01), Savage et al.
patent: 5906179 (1999-05-01), Capdevila
patent: 6048174 (2000-04-01), Samit et al.
patent: 6059532 (2000-05-01), Chen et al.
patent: 6071077 (2000-06-01), Rowlands
patent: 6315521 (2001-11-01), Hunt
patent: 6328533 (2001-12-01), Decker et al.
patent: 6338609 (2002-01-01), Decker et al.
patent: 6368061 (2002-04-01), Capdevila
patent: 6386830 (2002-05-01), Slipper et al.
patent: 6471474 (2002-10-01), Mielke et al.
patent: 6524070 (2003-02-01), Carter
patent: RE38040 (2003-03-01), Spear et al.
patent: 6561760 (2003-05-01), Wadia et al.
patent: 6561761 (2003-05-01), Decker et al.
patent: 6562227 (2003-05-01), Lamphere et al.
patent: 6991428 (2006-01-01), Crane
Cumpsty, “Compressor Aerodynamics,” 1989, pp: Cover, copyr., variables, 214, and 215.
Kandebo, “Geared-Turbofan Engine Design Targets Cost, Complexity,” Av. Week & Space Tech., vol. 148, No. 8, Feb. 1998, 2 pages.
www.rolls-royce.com, “Trent 1000,” copyright 2004, 3 pages.
A. Wadia et al, “Forward Swept Rotor Studies in Multistage Fans with Inlet Distortion,” ASME Turbo Expo 2002, Amsterdam, The Netherlands, Jun. 2002, pp. 1-11.
Pratt & Whitney Canada, “PW 500,” www.pwc.ca, copyright 2000-2003, 2 pages.
Aerospace Engineering Online, “Pratt & Whitney's Next Leap in Engine Technologies,” www.sae.org, downloaded Feb. 18, 2005, 3 pages.
Aerospace Engineering Online, “Pratt & Whitney Gearing up the PW 800,” www.sae.org, Aug. 2001, 4 pages.
Kandebo, “Military Technologies Finging Homes in Commercial Engines,” www.AviationNow.com, Jun. 1999, 6 pages.
Decker John Jared
Solomon William Joseph
Szucs Peter Nicholas
Wilson Virginia Louise
Andes William S.
Conte Francis L.
General Electric Company
Kershteyn Igor
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