Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7972112 | Systems and methods for determining the angular position of a wind turbine rotor Certain embodiments of the invention may include systems and methods for determining an angular position of a wind turbine rotor. According to an exemplary embodiment of the invention, the method for determining an angular position of a wind turbine may include meas... | 07/05/2011 |
| 7425117 | System and method for reducing back flow A system and method of reducing back flow in an air mover having one or more blades is described. A flap is attached to a blade of the air mover such that, when back flow occurs, the flap obscures all or a portion of the space between blades during back flow. ... | 09/16/2008 |
| 7419357 | Ram air turbine blade disengagement mechanism for over-speed prevention An improved ram air turbine (RAT) prevents release of its turbine blades due an over-speed condition by detecting an over-speed condition with a trigger mechanism and rotating the blades to a fixed coarse pitch position with a release mechanism. ... | 09/02/2008 |
| 7354246 | Electronics cooling fan with collapsible fan blade An electronics cooling fan comprises at least one collapsible fan blade driven by centrifugal force to extend radially as the fan spins and driven by elastic force to retract as spinning slows or stops. ... | 04/08/2008 |
| 7351033 | Wind turbine load control method A method for limiting loads in a wind turbine by using measured loads or wind speed to increase the minimum pitch angle for extended periods. The minimum pitch angle will be allowed to relax down to the default when load excursions diminish. The method will allow tu... | 04/01/2008 |
| 7331760 | Fan revolution speed control method Actual temperatures of intake air, hydraulic oil, and coolant, to be cooled by a cooling fan, are detected. Target fan revolution speeds are determined by PI control units based on differences between the actual temperatures and target temperatures. The cooling fan ... | 02/19/2008 |
| 7318702 | River turbine A water wheel assembly is disclosed and comprises a water wheel including a plate having a rotation axis and a plurality of circumferentially-spaced receivers, each including a first slit defined through the plate, proximal to the axis, and a second slit defined thr... | 01/15/2008 |
| 7296970 | Ram air turbine speed sensing ball detent over-speed prevention mechanism A ram air turbine (RAT) prevents release of its turbine blades due an over-speed condition by detecting an over-speed condition with a turbine hub-mounted centrifugally operated trigger mechanism and rotating the blades to a fixed coarse pitch position with a releas... | 11/20/2007 |
| 7241117 | Motor shaft assembly and method A method for assembling a motor shaft with a bearing, a motor housing, and an impeller is disclosed. A motor shaft extension is used to retain the impeller axially on the motor shaft and allows the motor shaft to drive an additional component, such as an impeller, l... | 07/10/2007 |
| 7223071 | Device for providing assistance to the pilot of a rotorcraft in the event of engine failure The present invention provides a device enabling the collective pitch of the blades of the main rotor of a single-engined rotorcraft to be reduced automatically in the event of an engine failure. The device comprises an actuator which increases the collective pitch ... | 05/29/2007 |
| 7204674 | Rotor blade for a wind power installation A rotor for a wind power installation having at least one rotor blade. The smaller the surface area on which the wind acts, that is to say in particular the rotor blade area, the correspondingly lower is the load level for which installation has to be designed and t... | 04/17/2007 |
| 7172392 | Passive speed and power regulation of a wind turbine A wind turbine with at least one blade having a pitch axis that is offset laterally so that the blade does not intersect with an axis of rotation of the wind turbine, and a center of mass and an aerodynamic center are offset from the pitch axis in the direction para... | 02/06/2007 |
| 7156609 | Method of making complex twisted blades with hollow airfoil cross section and the turbines based on such A reactive turbine, each blade of which approximates a helical shape that is constructed with readily available conventional manufacturing techniques. The blades are constructed in discrete straight sections that, when joined, approximate a helix or any other effici... | 01/02/2007 |
| 7144214 | Rotor supporting structure of windmill for power generation A windmill 10 includes a frame 11 and a rotor 12 provided rotatively around the vertical shaft center. The rotor includes bosses 23, 24 located above and below, plural transversal blades 25 extending radially from the bosses, longi... | 12/05/2006 |
| 7137785 | Wind power station A wind power station has at least one rotor. The rotor has at least one rotor blade, preferably two or more rotor blades. The rotor blade is operatively connected to a rotor shaft. The rotor blade can rotate about a substantially radially extending adjustment axis. ... | 11/21/2006 |
| 7132760 | Wind turbine device A hybrid blade wind turbine device formed of at least a pair of straight outer airfoil blades, and a pair of inner helical wing blades, as supported for rotation within a safety protective cage structure, which wind turbine can be mounted in the vertical, horizontal... | 11/07/2006 |
| 7118336 | Pressurized oil supply for propeller engine system A system and method for providing pressurised oil during non-feathered in-flight shutdown conditions in a variable-pitch aircraft propeller engine. A secondary pump provides pressurised oil substantially independent of an engine main oil circuit. ... | 10/10/2006 |
| 7101152 | Method for maximizing the energy output of a wind turbine A method is provided for controlling a wind turbine, and a wind turbine is provided with a control device for controlling a wind turbine. A method and a wind turbine are developed so that losses of yield, particularly as a result of variations in the conversion of t... | 09/05/2006 |
| 7094017 | Vertical shaft driving device for vertical wind mills or the like and electric power generator using the same A vertical shaft driving device wherein a plurality of rotary blades (8a, 8b, 8c and 8d) each including a blade (10) supported on a planetary shaft are equally arranged circumferentially of a central sha... | 08/22/2006 |
| 7074010 | RAM air turbine over-speed protector using redundant yoke plate linear bearings An improved ram air turbine for generating emergency aeronautical supplemental power with a plurality of concentric or nested linear bearings for supporting a speed governor yoke plate on a speed governor shaft comprising a movable sleeve that supports the yoke plat... | 07/11/2006 |
| 7044713 | Wind power generator with multiple rotary wings A wind power generating apparatus having a plurality of rotary wings can reduce the load and resistance on the rotary wings due to wind to obtain a highly effective rotation power as well as to flexibly absorb the impact applied to the rotary wings due to varying wi... | 05/16/2006 |
| 7040858 | Wind power generator, windmill, and spindle and blade of the windmill A wind power generator has a windmill for rotating the generator. The windmill includes a main vertical shaft, a rotor, and a wind-receiving blade. The rotor, fixed horizontally at the upper end of the main vertical shaft, comprises a flywheel, and a plurality of wi... | 05/09/2006 |
| 7025559 | Methods and systems for operating rotary machines A method for operating a rotary machine is provided. The rotary machine includes a stationary member and a rotatable member wherein the rotatable member is configured to rotate at least partially within the stationary member. The method includes determining an off-n... | 04/11/2006 |
| 7011503 | Fan blade for allowing airflow with fan in failure condition A fan and a fan blade are provided for allowing airflow through the fan blade in a fan failure condition. The fan blade includes a peripheral member defining an opening. A flexible cover member is attached to the peripheral member for covering the fan blade opening ... | 03/14/2006 |
| 6986641 | Engine control system A power turbine speed control system for a helicopter is disclosed which includes components for generating a power turbine speed signal based upon a demanded rotor speed, a high-order filter for filtering the power turbine speed signal by effectuating a rapid atten... | 01/17/2006 |
| 6984110 | Windmill blade and apparatus for generating power using the blade Disclosed is a wind power generating apparatus in which windmill blades are mounted in a multi-stage fashion to a rotating shaft while being spaced apart from one another to efficiently generate wind power. Each windmill blade includes blade bodies mounted to the ro... | 01/10/2006 |
| 6972498 | Variable diameter wind turbine rotor blades A system and method for changing wind turbine rotor diameters to meet changing wind speeds and control system loads is disclosed. The rotor blades on the wind turbine are able to adjust length by extensions nested within or containing the base blade. The blades can ... | 12/06/2005 |
| 6956300 | Gimbal-mounted hydroelectric turbine A power plant extracts energy from a free flowing motive fluid by means of a turbine mounted on a gimbal. The shroud element of the fluid intake has external rudders, in conjunction with the gimbal mounting, enabling the enclosed turbine to instantaneously respond t... | 10/18/2005 |
| 6921248 | System for controlling the torsional stability of the drivetrain of a machine, in particular of a helicopter System for controlling the torsional stability of the drivetrain of a machine, in particular of a helicopter. The system (1) comprises a means (7) for acting on the speed of an engine (5) of the power train of the machine, a means (8 | 07/26/2005 |
| 6755609 | Radial pump A radial-flow pump (1), and especially a coolant pump for an internal combustion engine, comprising an impeller (2) provided with vanes (5) and a directing device (4) including at least one temperature- and/or speed-sensitive element for ... | 06/29/2004 |
| 6749399 | Vertical array wind turbine A wind turbine with an array of rotors arranged at various heights. Each rotor is optimized for the height at which it is located. Optimization of each rotor could include selection of rated power, solidity, tip speed, blade twist, blade taper, or rotor diameter. Ea... | 06/15/2004 |
| 6736593 | Protective device for a turbo molecular pump and method of protecting a turbo molecular pump A protective device is provided for protecting a turbo molecular pump having a rotor mounted for undergoing rotation, an intake port for sucking gas by rotation of the rotor, and an exhaust port for exhausting the gas sucked from the intake port. The protective devi... | 05/18/2004 |
| 6644922 | Variable pitch fan A variable pitch fan in which the pitch of the fan blades is varied under control of a controller according to the speed of the fan. The controller is programmed to respond to increased fan speed by decreasing pitch of the fan blades. The variable pitch f... | 11/11/2003 |
| 6641365 | Optimum speed tilt rotor A variable speed helicopter tilt rotor system and method for operating such a system are provided which allow the helicopter rotor to be operated at an optimal angular velocity in revolutions per minute (RPM) minimizing the power required to turn the roto... | 11/04/2003 |
| 6311106 | Automatic flat rate setting system for freight feeder aircraft and method of setting of engine flat rate A system and method of automatically setting a flat rate engine power setting of an aircraft determines the weight of loaded cargo containers to determine the total gross weight of the aircraft prior to take-off, determines, from the total gross weight, t... | 10/30/2001 |
| 6227803 | Apparatus for generating electric power using wind force An apparatus for generating electric power using wind force which is capable of generating good quality electric power by combining the apparatus with the inventor's water wave force-based electric power generating apparatus and installing this combined a... | 05/08/2001 |
| 6193464 | Active brake control for rotor/wing aircraft The present invention comprises a feedback-controlled braking apparatus that applies a modulated braking force that smoothly decelerates a rotating shaft such that it comes to rest at a precise location. According to a preferred embodiment of the present ... | 02/27/2001 |
| 6161994 | Device for cleaning the working area of chip removal machines A propeller with pivoting blades is provided as a cleaning tool (1) for the work area of metal cutting machines, where the angle of adjustment for the pivoting blades is such that an air jet is generated supporting the propeller blades (15) in folding ope... | 12/19/2000 |
| 6065930 | Cooling control apparatus A cooling control apparatus controls a plurality of cooling members. The apparatus has a monitor which monitors states of predetermined combinations of the cooling members and a controller which controls the cooling members based on the states monitored b... | 05/23/2000 |
| 6059528 | Electronic propeller control system An improved electronic hydraulic propeller control designed as a retro-fit kit for existing Hamilton Standard Division 54460 and 54H60 propeller controllers includes an apparatus for controlling the pitch angle of a propeller blade. The retro-fit kit incl... | 05/09/2000 |
