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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 7638984 | Method for the operation of a wind energy plant with voltage-dependent control of a reactive electric variable which is to be provided A method for the operation of a wind energy plant, with control of a reactive electric variable which is to be provided, wherein a desired value for the reactive electric variable is determined as follows: a first upper and/or a first lower limit value of the grid v... | 12/29/2009 |
| 7368828 | Wind energy system A wind energy system comprising a queue of turbines housed in a horizontal air conduit. The inlet end of the conduit opens into a wind collector assembly, which preferably comprises in part downwardly extending earthen slope, such as a hillside or embankment. The wi... | 05/06/2008 |
| 7338257 | Device for interacting with a fluid moving relative to the device and vehicle including such a device A device (10) for interacting with a fluid (12) moving relative to the device. The device comprises a body with an axis of rotation (22) and a periphery (24). The body is rotatable about the axis of rotation. The device also comprises a p... | 03/04/2008 |
| 7315089 | Powertrain system comprising compressed air engine and method comprising same A powertrain system comprises a compressed air supply apparatus, a compressed air engine, a rotary power conversion apparatus and an electrical power conversion apparatus. The compressed air engine is configured for extracting energy from compressed air. The compres... | 01/01/2008 |
| 7253536 | Water supply apparatus A water supply apparatus includes an apparatus body disposed in a flow passage for sucking water to an indoor facility and a power generation unit installed in the apparatus body. Further, the power generation unit further comprises a rotating shaft extended in a di... | 08/07/2007 |
| 7249147 | Combination compact disc recorder and player system The combination recorder and player system includes a recorder/player unit and a remote control unit. The recorder/player unit includes a recorder/player computer system and recorder/player software that is operable to cause the recorder/player to record, play, and ... | 07/24/2007 |
| 7230346 | Power source for sensors A sensor is placed in wireless communication with a monitoring system. Power for the sensor is generated by scavenging power from fluid flow within a pipe. ... | 06/12/2007 |
| 7221127 | Alternator with rectifier bridge in particular for motor vehicle The alternator comprises a wound rotor and a stator with a number of phases connected to a rectifier bridge equipped with switches (7) in the form of MOS type transistors, such as MOSFET type transistors, characterised in that the transistors (7) are v... | 05/22/2007 |
| 7157802 | Electrical power source An electrical power source is described. The electrical power source derives input power from a compressed gas which is fed into a transducer, generating electrical power. The compressed gas may be delivered to the unit by several means including manual pumps, therm... | 01/02/2007 |
| 7147069 | Wind turbine driven generator system for a motor vehicle The invention relates to a vehicle including a body having a one or more openings. The body is configured, such as through the use of air guides, to receive an airflow through the one or more openings. An electrical generator assembly is mounted inside the vehicle a... | 12/12/2006 |
| 7119451 | Self-powered miniature liquid treatment system with ultraviolet dosing A liquid treatment system that may be self-powered includes a filter, an ultraviolet light source and a hydro-generator. A flow of liquid may be filtered with the filter and used to rotate the hydro-generator to generate electric power. The ultraviolet light source ... | 10/10/2006 |
| 7112892 | Power source for sensors A sensor is placed in wireless communication with a monitoring system. Power for the sensor is generated by scavenging power from fluid flow within a pipe. ... | 09/26/2006 |
| 7097113 | Irrigation unit including a power generator An irrigation unit (20) for irrigating an area (12) with a fluid (19) from a fluid source (18) includes a housing (200), a nozzle (220), an electronic component (221), and a power generator (230). The nozzle ( | 08/29/2006 |
| 7095129 | Methods and apparatus for rotor load control in wind turbines A wind turbine having a rotor, at least one rotor blade, and a plurality of generators, of which a first generator is configured to provide power to an electric grid and a second generator is configured to provide power to the wind turbine during times of grid loss.... | 08/22/2006 |
| 7088027 | Rotating asynchronous converter and a generator device The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second... | 08/08/2006 |
| 7081688 | Energy recovery apparatus and method of operating energy recovering apparatus A system is provided to recover unutilized energy as electric power in hydraulic turbine power generation. The system includes a heat storage tank, a pump for pumping water from the heat storage tank and to air conditioning loads, a first water feed pipe connected b... | 07/25/2006 |
| 7067936 | Self-powered miniature liquid treatment system with multiple liquid flow paths A liquid treatment system that may be self-powered includes a filter, an ultraviolet light source and a hydro-generator in a first flow path. The first flow path may provide treated liquid at a first outlet of the liquid treatment system. A second flow path included... | 06/27/2006 |
| 7042108 | Backup power system A backup power system is connected in parallel to a load which is powered via a power line connecting that load to a main power source, such as a utility. The backup system includes a generator/condenser unit that is coupled to a flywheel unit to maintain the flywhe... | 05/09/2006 |
| 7019411 | Energy recovery apparatus and method of operating energy recovering apparatus A system is provided to recover unutilized energy as electric power in hydraulic turbine power generation. The system includes a heat storage tank, a pump for pumping water from the heat storage tank and to air conditioning loads, a first water feed pipe connected b... | 03/28/2006 |
| 6996937 | Potential energy storage system The present invention relates to a system for generating electrical power using hydraulic supports on which a building structure is mounted. A pump injects fluid into the supports to raise the building structure and thereby store energy in the elevated structure. A ... | 02/14/2006 |
| 6943462 | Ring generator for a wind power installation A slowly rotating synchronous generator (ring generator) for a wind power installation, the generator having a rotor and a stator surrounding the rotor, and the stator having at least one three-phase current winding on which a capacitive current is impressed, and th... | 09/13/2005 |
| 6936932 | System and method for electrical power generation utilizing vehicle traffic on roadways The present invention relates to methods and systems for power generation including a method and system for electrical power generation by utilizing forces due to vehicle weights from traffic on roadways. An embodiment of the invention uses multiple compressible hyd... | 08/30/2005 |
| 6927501 | Self-powered miniature liquid treatment system A liquid treatment system that may be self-powered includes a filter, an ultraviolet light source and a hydro-generator in a first flow path. The first flow path may provide treated liquid at a first outlet of the liquid treatment system. A second flow path included... | 08/09/2005 |
| 6924627 | Method of reactive power regulation and aparatus for producing electrical energy in an electrical network A method of reactive power regulation in an electrical network in which electrical power is produced by an electrical generator preferably driven by the rotor of a wind power installation and suitably modulated by means of a compensation device between the generator... | 08/02/2005 |
| 6897573 | Electrical voltage generating device A manually operated voltage generating device provides an electrical voltage for operating an electronic unit such as a remote control handheld unit. The device has a permanent magnet mounted in a horizontal manner at the underside of a mild steel plate. The magnet ... | 05/24/2005 |
| 6703718 | Wind turbine controller A wind turbine with a permanent magnet alternator that uses a boost mode controller to improve performance at low and high wind speeds. The boost mode controller also allows the permanent magnet alternator to be slowed so that the wind turbine can be stal... | 03/09/2004 |
| 5652485 | Fuzzy logic integrated electrical control to improve variable speed wind turbine efficiency and performance A control system utilizing fuzzy logic adaptive control to control the operation of a wind turbine driven electric power generator to control power generator speed and hence power frequency while maximizing the power output of the power generator. Wind tu... | 07/29/1997 |
| 5406190 | Device for generating electrical energy having an A.C. generator coupled to a turbine A device for generating electrical energy includes at least one a.c. generator which is coupled to a turbine driven by a flowing medium and is connected via capacitive elements to a rectifier with impressed output voltage. The capacitive elements are rate... | 04/11/1995 |
| 5296799 | Electric power system An electric power system has an air compressor unit with a reservoir tank, an air powered motor and an electric generator. The air compressor unit has an air compressor that provides compressed air to the reservoir tank. The air compressor is driven by an... | 03/22/1994 |
| 5289106 | Electrical supply system for low current loads An electrical supply system (10) for use with low current loads (12) disposed in hazardous areas, is described. Electricity is supplied to the low current load (12) from a local source (46) in response to mechanical energy from a fluid medium supplied fro... | 02/22/1994 |
| 5140254 | Shower accessory An accessory is provided for a shower having a shower outlet. The accessory includes a housing having a front, a back and a fluid passageway extending between the front and the back of the housing. The housing is attached to the water outlet so that the f... | 08/18/1992 |
| 5079495 | Charge exhaustion preventing apparatus of storage battery A charge exhaustion preventing apparatus of a storage battery, includes a generator disposed on a waterway, a storage battery charged by the generator, an electromagnetic valve which opens and closes the waterway by the storage battery as the power source... | 01/07/1992 |
| 5029288 | Method and apparatus for operating a variable speed power generation system A method and apparatus for operating a variable speed power generation system in which the generated output of an induction generator is adjusted by controlling current in the secondary side of the induction generator. Rotation speeds of the induction gen... | 07/02/1991 |
| 4951915 | Electronic water flow control device An electronic water flow control device, which includes a mini-scale electrical generator which changes the mechanical energy from water flow into electrical energy for storage in a battery and for further use in driving a motor, by means of the control o... | 08/28/1990 |
| 4918369 | Hydro-energy conversion system A water or fluid driven system is provided for use in a water open or closed loop system. The water driven system includes a flow control valve connected to a water line of the water open or closed loop system for controlling the flow of water into the wa... | 04/17/1990 |
| 4857755 | Constant power system and method A method and system for maintaining a substantially constant output of electrical power includes an engine for operating upon receipt of a signal, an electric motor, a flywheel mounted to rotate when either the engine or the motor is operated, a generator... | 08/15/1989 |
| 4731545 | Portable self-contained power conversion unit A portable, self-contained power conversion unit is disclosed that is attached to an outlet for a pressurized fluid system, such as the nozzle for a garden hose. An impeller mounted in the body of the unit and is rotated by the discharge of pressurized fl... | 03/15/1988 |
| 4723107 | Hydraulic lifting mechanism A hydraulic lifting mechanism, particularly suitable for a battery-powered industrial truck, including a hydraulic lifting cylinder, a hydraulic unit, operating as a pump in the load lifting operational mode, and supplying the lifting cylinder with pressu... | 02/02/1988 |
| 4703189 | Torque control for a variable speed wind turbine Apparatus and method for controlling a variable speed wind turbine-generator at improved efficiencies is disclosed. The method and apparatus of the invention control the rotor tip speed below the limiting torque of the wind turbine at a selected constant ... | 10/27/1987 |
| 4695736 | Variable speed wind turbine A variable speed wind turbine includes a frequency converter which converts variable frequency AC from a turbine driven AC generator to fixed frequency AC for delivery to a power grid. The frequency converter is typically an electronic cycloconverter or r... | 09/22/1987 |
