Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8087894 | Aperture and flap vertical axis wind machine A vertical axis wind machine having a mechanism of apertures and flaps to reduce return blade wind drag. The aperture and flap vertical axis wind machine has improved rotational speed and torque in relation to existing vertical axis wind machines. The aperture and f... | 01/03/2012 |
| 7946818 | Shock absorber for adjustable pitch propeller with feathering blades, particularly for sailers The lifetime of plural shock absorbing resilient inserts of an adjustable pitch propeller with feathering blades may be increased. According to an embodiment, stops are implemented between metal surfaces that may be reached only in the event of shocks of great viole... | 05/24/2011 |
| 7922452 | Eolic converter A windmill converting wind forces into rotational energy that can be used to drive a generator or other apparatus requiring rotational energy to work. The windmill includes panels for capturing the wind arranged around a vertically rotating shaft. The panels are abl... | 04/12/2011 |
| 7467923 | Fluid flow energy conversion apparatus Tidal forces used for generation of electrical power has long been a solution to a recognized need. A really practical device to convert the energy of the fluid flow through tidal inlets into electrical power is the subject of this invention. ... | 12/23/2008 |
| 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 |
| 7302771 | Inflatable decoration An inflatable decoration has a body, an inflator and a rotary illuminant member. The body has a tower and a seat mounted on the tower. Multiple transparent windows are respectively provided on a periphery of the seat. The inflator is mounted in a lower end of the to... | 12/04/2007 |
| 7303369 | Magnetic vertical axis wind turbine A lift and drag-based vertical axis wind turbine in which the vertical axis and foils mounted thereon are magnetically levitated above the turbine's base, thereby reducing friction within the system. The foils or vanes are three-dimensionally shaped about the vertic... | 12/04/2007 |
| 7291936 | Submersible electrical power generating plant A self-supporting, submersible generating plant for producing electricity from ocean currents, consisting of two counter-rotating, rear-facing turbines with a plurality of rotor blades extending radially outward from two separate horizontal axis that convey the kine... | 11/06/2007 |
| 7284949 | Vertical axis wind or water turbine A mechanical device consisting of two horizontal shafts (4 & 5) in cruciform each rotating axially within two sets of bearings (6), each set positioned near either end and interfaced upon a rotor base (10) which itself is fixed to a verti... | 10/23/2007 |
| 7281891 | Wind turbine control having a lidar wind speed measurement apparatus A wind turbine is provided having a lidar wind speed measurement apparatus for achieving wind control. The lidar apparatus is arranged to scan the area in front of the wind turbine so as to generate a measurement of the wind speed across the wind field. The lidar ap... | 10/16/2007 |
| 7267530 | Windmill apparatuses and methods of mounting blades to enhance their performance A windmill apparatus has multiple pairs of blades to enhance power output and lift performance. The apparatus has multiple double acting piston/cylinders actuated by the windmill, which includes several clutches that are used to engage and disengage the windmill fro... | 09/11/2007 |
| 7256512 | Variable aperture velocity augmented ducted fan wind turbine A wind powered variable area exit aperture electric generating system having configurable, adjustable duct side walls by which means the ratio between the intake cross-sectional aperture area and the exhaust cross-sectional aperture area may be varied for maximum ai... | 08/14/2007 |
| 7241105 | Watercraft with vertically collapsible vertical axis wind turbine and propeller flexible drive shaft A vertically collapsible vertical axis wind turbine may be used on land, or on a watercraft (e.g. a multihull such as a catamaran). The turbine may include a substantially vertical shaft; at least two vane supports mounted by the shaft; and at least two vertically c... | 07/10/2007 |
| 7198460 | Hydraulic or pneumatic machine with tilting blades This invention refers to a hydraulic or pneumatic machine with tilting blades, running either as an engine on a fluid flow or on pressure fluid or as a pump or a compressor. The hydraulic or pneumatic machine on a fluid flow according to the invention consists of a ... | 04/03/2007 |
| 7186083 | Wind energy conversion device A wind energy conversion device includes a propeller in which each of the propeller blades includes a proximal (radially inward) non-airfoil mounting section, a medial section and a distal tip section mounted to pivot relative to the medial section about a pitch axi... | 03/06/2007 |
| 7176584 | Wind power apparatus A wind power apparatus utilizing an anchor which is rotatably fixed to a surface. A chute attaches to the anchor and is provided with a chamber. A restriction is located in the chamber to concentrate the wind within an annular are of the chute and direct it to a pow... | 02/13/2007 |
| 7157805 | Wind powered pendulating land sail electricity generation system An electricity generation system having the ability to generate clean electrical power by mechanically capturing the power of the wind. The system utilizes one or more modular wind collecting sail assemblies that are mounted on an upright oriented pole assembly. The... | 01/02/2007 |
| 7118341 | Self adjusting sail vertical shaft windmill A vertical shaft is provided and supported whereupon are mounted sails that can so self adjust as to interact with the wind in such a way as to power a windmill as well as relieve themselves from winds that are too severe while maintaining continuous operation. ... | 10/10/2006 |
| 7088012 | Transverse hydroelectric generator A power plant extracts energy from a free flowing motive fluid by means of a transverse mounted generator with its rotor extending downward into the flow. Runner blades with hinges attain the greatest surface area when the flow is tangent to and in the same directio... | 08/08/2006 |
| 7077628 | Wind machine with independent fabric A wind machine comprises a plurality of fabrics that are removeably installed on a rotatable carrier. The carrier axis of rotation may be either horizontal or vertical. The carrier has pairs of first and second arms that support opposite ends of a fabric net. Side s... | 07/18/2006 |
| 7066709 | Wind driven power generating system The present invention discloses a wind driven power generator. The wind driven power generating system comprises: a) an aerodynamic unit rotatably mounted at the top of a tower having a certain height; b) a plurality of rudders for aligning the aerodynamic unit with... | 06/27/2006 |
| 6992402 | Wind-driven power station The wind-driven power station comprises a closed-loop rail track consisting of sections of gradual ascent and descent. The descent section directed upwind is positioned in an artificial tunnel. Basic elongated sections of the rail track are situated across the predo... | 01/31/2006 |
| 6929450 | Turbine apparatus and method A turbine system (10) for capturing energy from a fluid stream includes a torque arm (12). At least a pair of, preferably symmetrical clam shell, turbine blades (14) with the upper (16) and lower (18) halves are oppositely connecte... | 08/16/2005 |
| 6913435 | Integrated vane for use in wind or water and process for producing same In an integrated vane 1 for use in wind or water, main blades 3 arranged around an axial shaft 2 of the vane and support blades 4 for joining the main blades to the axial shaft are integrally formed with light and high strength fiber mate... | 07/05/2005 |
| 6749393 | Wind power plant A wind power plant for producing electrical energy on a large scale, comprising a base, a housing, rotatable on said base around vertical axis. A wind tail, attached to the housing, rotate the housing toward direction of the wind, utilizing the power of the wind, an... | 06/15/2004 |
| 6682302 | Turbine apparatus and method A turbine system (10) for capturing energy from a fluid stream includes a torque arm (12). At least a pair of, preferably symmetrical clam shell, turbine blades (14) with the upper (16) and lower (18) halves are oppositely connected to the torque arm (12)... | 01/27/2004 |
| 6682296 | Turbine for flowing fluids Turbine for flowing fluid, especially a turbine having a vertical power output shaft and formed with several wings projecting radially out from the power output shaft, which wings are rotatable over an angle of about 90° about horizontal shafts extending... | 01/27/2004 |
| 6655916 | System for harnessing wind energy with self-protection System for harnessing wind energy with self-protection that includes a vertical shaft assembled with bearings on the rotating core. The core is equipped with a gear converting movement into energy. The core carries radial pieces in which there is an upper... | 12/02/2003 |
| 6619921 | Driving vane assembly for a windmill A blade assembly for a windmill includes an output shaft with a first cross-shaft and a second cross-shaft operatively mounted relative to the output shaft. The first cross-shaft and the second cross-shaft include a first end and a distal end. A first bla... | 09/16/2003 |
| 6554573 | Rotor A rotor is intended to rotate in a fluid flowing in a flow direction and comprises a plurality of rotor blades, at the most four blades, which are arranged to rotate about an axis of rotation. Each blade forms a single-curved surface, the generatrix of wh... | 04/29/2003 |
| 6489691 | Wind power generation system A wind power generation system mainly includes a wind catching mechanism slidably mounted on a guide rail mechanism. The wind catching mechanism includes a wind-catching means that is selectively oriented to face wind blowing against it, so as to cause th... | 12/03/2002 |
| 6402472 | Sail-type windmill wheel A sail-type windmill wheel is provided in which the area of the wheel facing into the wind is adjusted by an automatic variation of the blade angle of the sails. The wind wheel comprises a hub (22) with a plurality of radially extending spars (18), substa... | 06/11/2002 |
| 6354536 | Rotor hub mounted actuator for controlling a blade on a rotorcraft A hub mounted actuation system for providing control of a portion of a rotor blade, such as a flap, on a rotorcraft. The rotor blade is attached to a rotor shaft that rotates with respect to an airframe. The hub mounted actuation system includes a station... | 03/12/2002 |
| 6283710 | Vertical axis wind turbine rotor having self-fairing vanes A vertical axis wind turbine rotor having self-fairing vanes wherein the center of pressure on each vane is coplanar with the journal for the hub of the turbine rotor.... | 09/04/2001 |
| 6132172 | Windmill An improved windmill includes a conical rotor unit, a frame for supporting the conical rotor unit and a base for supporting the frame. The conical rotor unit has a conical rotor with a plurality of spaced curved blades disposed thereon and a plurality of ... | 10/17/2000 |
| 6113350 | Vertical-axle power machine A vertical-axle wind power machine comprises a vertical axle, a plurality of jointed radial arms, a plurality of counterbalanced oblique blades at the support points thereof, a friction-rewarding rotary speed multiplying transmission, and an automatic rot... | 09/05/2000 |
| 5951249 | Self governing fluid energy turbine A fluid energy turbine has a radial flow rotor in which fluid driven blades are peripherally distributed about a horizontal axis and in which auxiliary-biased outlet gates are provided for release of high fluid pressures to govern turbine speed such as in... | 09/14/1999 |
| 5808369 | Windtrap for power development A wind power generator comprises a shaft operatively mounted in a support frame for rotation about a substantially vertical axis. A wing arm is fixedly mounted on the shaft and extends radially outward therefrom. Finally, a windtrap assembly is disposed p... | 09/15/1998 |
| 5570997 | Horizontal windmill with folding blades Windmill (10) having a plurality of hydrodynamic, folding blades (12, 14, 16 and 18) secured to a hub (64). The blades are propelled by wind current such that the windmill rotates about a central axis of a shaft (20) on which a hub (64) is journalled. Eac... | 11/05/1996 |
| 5525037 | Overlapping sail wind turbine A wind turbine for converting wind energy to useable energy having a plurality of overlapping sail members. The sail members extend radially outward from a vertically disposed shaft in three columns positioned equidistantly around the shaft. The overlappi... | 06/11/1996 |
