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Class Information
Number: 416/17
Name: Fluid reaction surfaces (i.e., impellers) > With means positioning fluid current driven impeller relative to flow direction > Feathering cycle related to flow direction
Description: Apparatus wherein the impeller motion is regular and recurrent (e.g., oscillatory, rotary, etc.) and one or more working members* thereof assume a changed operative relationship to the flowing medium at a predetermined point in the cycle of operation, the point at which the cyclic working member motion occurs being maintained at a constant fixed relation to the direction of working fluid flow.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8602719 Vertical axis wind turbine Dec. 10, 2013
8540485 Cycloidal rotor with non-circular blade orbit Sep. 24, 2013
8480363 Self-starting turbine with dual position vanes Jul. 9, 2013
8459946 Horizontal axis wind turbine Jun. 11, 2013
8382435 Opposed tilting blade, vertical axis wind turbine power generator Feb. 26, 2013
8333561 Vertical axis wind turbine Dec. 18, 2012
8202050 Wind turbine with wireless pitch control Jun. 19, 2012
8197206 Apparatus for generating electricity from a flow of water such as a tide, river or the like Jun. 12, 2012
8172529 Method of operation of a high-efficiency turbine with variable attack angle foils May. 8, 2012
8164213 Orbital track wind turbine Apr. 24, 2012
8137065 Aerogenerator having means for maintaining vane unit horizontal Mar. 20, 2012
8109722 Turbine and system for generating power from fluid flow and method therefor Feb. 7, 2012
8100647 Method for operating a wind turbine, a wind turbine and use of the method Jan. 24, 2012
8021111 Method for operating a wind turbine, a wind turbine and use of the method Sep. 20, 2011
8016544 Vertical windmill Sep. 13, 2011
7993096 Wind turbine with adjustable airfoils Aug. 9, 2011
7918646 High efficiency turbine with variable attack angle foils Apr. 5, 2011
7862290 Fluid energy-harnessing apparatus Jan. 4, 2011
7766601 Vertical-axis wind turbine Aug. 3, 2010
7665966 Flow-controlled wind rotor Feb. 23, 2010
7550862 Wind turbine and method for the automatic correction of wind vane settings Jun. 23, 2009
7413404 Sail wing type windmill Aug. 19, 2008
7288850 System and apparatus for emergency backup power generation Oct. 30, 2007
7284949 Vertical axis wind or water turbine Oct. 23, 2007
7258527 Vertical axis wind engine Aug. 21, 2007
7245039 Apparatus and method for generating hydrogen gas through the use of wind power Jul. 17, 2007
7126235 Wind power electric device and method Oct. 24, 2006
7118341 Self adjusting sail vertical shaft windmill Oct. 10, 2006
6992402 Wind-driven power station Jan. 31, 2006
6926491 Vertical axis wind turbine with controlled gybing Aug. 9, 2005
6840738 Feathering turbine apparatus Jan. 11, 2005
6672522 Wind power generating system Jan. 6, 2004
6543999 Windmill Apr. 8, 2003
6379115 Windmill and windmill control method Apr. 30, 2002
6179563 Wind-powered drive shaft Jan. 30, 2001
6158953 Wind turbine with variable position blades Dec. 12, 2000
6000907 Fluid-activatable vane for a fluid turbine Dec. 14, 1999
5864183 Method and apparatus for optimizing performance of a pump-turbine Jan. 26, 1999
5855470 Wind wheel with rotationally faced plates Jan. 5, 1999
5844323 Rotatable wheel for developing fluid kinetic energy by accepting action forces from multiple directions Dec. 1, 1998
5676524 Vertical-axis wind turbine Oct. 14, 1997
5324169 Oscillating, lateral thrust power generator Jun. 28, 1994
5302084 Windmill with annular flywheel Apr. 12, 1994
5195871 Self-restored windmill Mar. 23, 1993
5193978 Articulated blade with automatic pitch and camber control Mar. 16, 1993
4979871 Wind turbine Dec. 25, 1990
4832569 Governed vane wind turbine May. 23, 1989
4776762 Windmill Oct. 11, 1988
4764090 Vertical wind turbine Aug. 16, 1988
4707617 Windmill apparatus Nov. 17, 1987

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