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Class Information
Number: 416/41
Name: Fluid reaction surfaces (i.e., impellers) > With control means responsive to non-cyclic condition sensing, centrifugal actuation, torque or thrust > Responsive to relative working fluid velocity > Natural fluid current
Description: Apparatus wherein the working fluid comprises natural fluid current.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8702390 Automatic blade pitch angle control mechanism for small horizontal axis wind turbines Apr. 22, 2014
8647061 Teeter-restraint device for wind turbines Feb. 11, 2014
8649911 System and method for operating a wind farm under high wind speed conditions Feb. 11, 2014
8608439 System for controlling operation of a crop protection wind machine array Dec. 17, 2013
8602732 Wind turbine rotor blade with passively modified trailing edge component Dec. 10, 2013
8602731 Microprocessor system for controlling rotor pitch Dec. 10, 2013
8602719 Vertical axis wind turbine Dec. 10, 2013
8562282 Large capacity wind power generator Oct. 22, 2013
8529206 Wind turbine generator and yaw rotation control method for wind turbine generator Sep. 10, 2013
8511989 Temperate control for wind turbine generator Aug. 20, 2013
8506248 Wind turbine rotor blade with passively modified trailing edge component Aug. 13, 2013
8506247 Arrangement and method to control the yawing of a wind turbine Aug. 13, 2013
8491262 Method for shut down of a wind turbine having rotor blades with fail-safe air brakes Jul. 23, 2013
8480362 Method for dynamically lubricating a wind turbine pitch blade bearing Jul. 9, 2013
8480363 Self-starting turbine with dual position vanes Jul. 9, 2013
8469665 Vertical axis wind turbine with twisted blade or auxiliary blade Jun. 25, 2013
8459949 Wind power generation having variable windmill wings Jun. 11, 2013
8430634 System and method for improving wind turbine efficiency by adjusting blade pitch in response to localized wind speed Apr. 30, 2013
8430632 System and method for pitching a rotor blade in a wind turbine Apr. 30, 2013
8425190 Pressure relief device Apr. 23, 2013
8382435 Opposed tilting blade, vertical axis wind turbine power generator Feb. 26, 2013
8366389 Methods and apparatus for controlling wind turbine thrust Feb. 5, 2013
8360724 Horizontal axis wind turbine Jan. 29, 2013
8353667 Method and apparatus for adjusting a yaw angle of a wind turbine Jan. 15, 2013
8328515 Wind power device Dec. 11, 2012
8317471 Method for preventing rotor overspeed of a wind turbine Nov. 27, 2012
8282350 Method and apparatus for capturing wind to produce electrical power Oct. 9, 2012
8277184 Tilt adjustment system Oct. 2, 2012
8267654 Wind turbine with gust compensating air deflector Sep. 18, 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
8257040 System and method for wind condition estimation Sep. 4, 2012
8246302 Teeter-restraint device for wind turbines Aug. 21, 2012
8240990 Apparatus and method for reducing asymmetric rotor loads in wind turbines during shutdown Aug. 14, 2012
8240991 Method and system for operating a wind turbine Aug. 14, 2012
8235662 Wind turbine metrology system Aug. 7, 2012
8231344 Methods for controlling the amplitude modulation of noise generated by wind turbines Jul. 31, 2012
8221076 Method of controlling the pitch velocity of a wind turbine blade and control system therefore Jul. 17, 2012
8215906 Variable tip speed ratio tracking control for wind turbines Jul. 10, 2012
8202048 Method of operating a wind turbine and wind turbine Jun. 19, 2012
8202051 Turbine apparatus Jun. 19, 2012
8197206 Apparatus for generating electricity from a flow of water such as a tide, river or the like Jun. 12, 2012
8192160 Wind turbine having variable height and method for operating the same Jun. 5, 2012
8174142 Wind turbine with paired generators May. 8, 2012
8172531 Plain bearing for a wind turbine blade and method of operating a wind turbine having such a plain bearing May. 8, 2012
8162608 Wind turbine, yaw system controller and yaw system for a wind turbine and method of reducing the loads acting on such a yaw system Apr. 24, 2012
8157521 Wind turbine generator and method of controlling the same Apr. 17, 2012
8133023 Wind turbine with variable area propeller blades Mar. 13, 2012
8128363 Wind flap brake assembly for wind turbine Mar. 6, 2012
8123477 Control of rotor during a stop process of a wind turbine Feb. 28, 2012
8113777 Ultralight airfoils for wind energy conversion Feb. 14, 2012

1 2 3 4

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