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Browse by Category: Main > Transportation & Automotive
Class Information
Number: 416/231B
Name: Fluid reaction surfaces (i.e., impellers) > Specific blade structure (e.g., shape, material, etc.) > Apertured or permeable > Slotted blade
Description:










Patents under this class:
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Patent Number Title Of Patent Date Issued
8585371 Wingtip device for the tip of a wing, blade of a wind generator or marine generator for reducing or even eliminating marginal swirl Nov. 19, 2013
8573946 Compressor blade Nov. 5, 2013
8491268 Safety propeller Jul. 23, 2013
8454310 Compressor blade with tip sealing Jun. 4, 2013
8356979 Fan blade mounting system Jan. 22, 2013
8303250 Method and apparatus for increasing lift on wind turbine blade Nov. 6, 2012
8267653 System and method of operating an active flow control system to manipulate a boundary layer across a rotor blade of a wind turbine Sep. 18, 2012
8215918 Impeller and cooling fan incorporating the same Jul. 10, 2012
8047795 Fan blade mounting system Nov. 1, 2011
8016560 Wind turbine rotor blade with actuatable airfoil passages Sep. 13, 2011
8011886 Method and apparatus for increasing lift on wind turbine blade Sep. 6, 2011
7857577 System and method of pumping while reducing secondary flow effects Dec. 28, 2010
7815419 Impeller for blower and air conditioner having the same Oct. 19, 2010
7736128 Stress relief grooves for Francis turbine runner blades Jun. 15, 2010
7594625 Proprotor blade with leading edge slot Sep. 29, 2009
7484930 Noise reduction of aircraft flap Feb. 3, 2009
7462014 Axial flow fan with multiple segment blades Dec. 9, 2008
7416394 Gas turbine and rotor blade for a turbomachine Aug. 26, 2008
7281900 Cascade rotor blade for low noise Oct. 16, 2007
7160084 Blade of a turbine Jan. 9, 2007
7025569 Axial flow fan with multiple segment blades Apr. 11, 2006
7014425 Low pressure fan with Y-shaped blades Mar. 21, 2006
6969237 Turbine airfoil cooling flow particle separator Nov. 29, 2005
6932569 Active control of multi-element rotor blade airfoils Aug. 23, 2005
6923624 Wooden fan blade Aug. 2, 2005
6840741 Leading edge slat airfoil for multi-element rotor blade airfoils Jan. 11, 2005
6752594 Split blade frictional damper Jun. 22, 2004
6709229 Bi-directional incoming air flow fan Mar. 23, 2004
6692232 Rotor assembly for disc turbine Feb. 17, 2004
6607359 Apparatus for passive damping of flexural blade vibration in turbo-machinery Aug. 19, 2003
6540476 Centrifugal fan Apr. 1, 2003
6474942 Airfoil configured for moisture removal from steam turbine flow path Nov. 5, 2002
6435815 Aerofoil for an axial flow turbo machine Aug. 20, 2002
6250797 Mixing impeller system having blades with slots extending essentially all the way between tip and hub ends thereof which facilitate mass transfer Jun. 26, 2001
6168383 Rotor blade for rotary-wing aircraft Jan. 2, 2001
6086328 Tapered tip turbine blade Jul. 11, 2000
6065938 Rotor for a turbomachine having blades to be fitted into slots, and blade for a rotor May. 23, 2000
6007296 Guide blade for steam turbines Dec. 28, 1999
6007300 Centrifugal multiblade fan Dec. 28, 1999
5564901 Low noise fan Oct. 15, 1996
5562412 Fan blade with filter Oct. 8, 1996
5403160 Fan blade configuration Apr. 4, 1995
5343826 Fluid indicator assemblies for sight flow apparatus Sep. 6, 1994
5328330 Extruded aluminum fan blade Jul. 12, 1994
5314308 System for controlling higher harmonic vibrations in helicopter rotor blades May. 24, 1994
5277550 Agitating vane Jan. 11, 1994
4929152 Method and apparatus for maintaining a mixture of products at a certain temperature May. 29, 1990
4913670 Blade-like profiled device for acting on a gaseous or liquid fluid flow Apr. 3, 1990
4802825 Method and apparatus for maintaining a mixture of products at a certain temperature Feb. 7, 1989
4758129 Power frame Jul. 19, 1988

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