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| Number | Title | Issue Date |
| 7278598 | Blender blade In one embodiment of the invention, a blender blade (10) includes a body portion (12) having an upper surface (15) and a lower surface (16). The body portion includes an aperture (13) effectively defining an axis of rotation for th... | 10/09/2007 |
| 7223073 | Boat propeller A boat propeller comprising a central hub member and an inner hub assembly that defines a longitudinally extending bore having an inner surface. The exterior surface of the central hub member is sized and shaped for disposition therein the bore of the inner hub asse... | 05/29/2007 |
| 7175392 | Ceiling fan motor with stationary shaft A ceiling fan motor includes a motor housing having an end wall and a side wall; a stator assembly mounted within the housing; a rotor assembly mounted within the housing to rotate relative to the stator assembly; and a fan blade hub adapted to have fan blades mount... | 02/13/2007 |
| 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 |
| 6659724 | Axial fan for vehicles Front edges 212b of blades 212 are so constituted as to be deviated toward the upstream side in the air stream beyond an axial end surface 211a, as viewed from a direction at right angles to the axial direction of a boss 211, and the blades 212 on the roo... | 12/09/2003 |
| 6582196 | Windmill rotor and wind blades therefor A windmill rotor of the front-runner type and airfoil type wind blades therefor in which the blade tips have a longitudinally forwardly curved configuration. The curvature solves the problem of inward flexure of the blade in strong wind conditions, withou... | 06/24/2003 |
| 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 |
| 6106232 | Propeller structure A propeller used to interact with a fluid to either move the fluid, e.g., a fan or generate thrust for propulsion, e.g., for an aircraft or boat. The propeller is characterized by at least first and second planar blades configured for mounting on a propel... | 08/22/2000 |
| 6077043 | Impeller for a fan and a method for making same An impeller for a fan, with improved performance characteristics, has a central hub with a plurality of wings extending radially outwardly therefrom. The impeller also has a plurality of blades, such that each blade is attached in an extending manner from... | 06/20/2000 |
| 6042333 | Adjustable pitch impeller An impeller has a plurality of rotating passageways which can be defined between adjacent blades, the blades having a curved root portion and able to pivot across a part spherical hub to maintain a fine line contact. The passageways have a convergence to ... | 03/28/2000 |
| 5462411 | Device for connecting blades to a hub A device for connecting blades (7) to a hub (5) in a propeller of either a fan or an aircraft has a variable fitting in at least a moving position. An L-shaped element (1) connects each blade (7) to the hub (5) so that an attachment of the blade (7) to th... | 10/31/1995 |
| 4863351 | Airscrew or propeller for propelling an aircraft An airscrew for propelling an aircraft has a hub, a jacket and a plurality of propeller blades secured by blade necks to the hub. These blade necks are secured to the hub with symmetric or equal angular spacings around the hub between neighboring radial b... | 09/05/1989 |
| 4801243 | Adjustable diameter screw propeller An adjustable diameter screw propeller includes a hub having a plurality of spindles, each mounted in the hub for rotation about an axis disposed radially of the hub axis and a mechanism for synchronously turning the spindles in a common direction. A plur... | 01/31/1989 |
| 4693671 | Reversible self-adjusting propeller device A self-adjusting propeller device having a control blade and a thrust blade connected together in nondiametrical relation and pivotally mounted on a hub for rotation about a hub axis. In response to a change in load on the device, the control blade pivots... | 09/15/1987 |
| 4560307 | Insulation blower A hopper cylindrical about a vertical axis has an agitator with blades rotating near the bottom of the hopper, not only to agitate insulation but also to move it through a hopper outlet opening into an airlock having a horizontal shaft and radially spaced... | 12/24/1985 |
| 4519715 | Propeller Propellers including blades affixed to a hub which provide generally axial flow of a fluid medium through the blade area. The blades are formed from cylindrical segments and include a generally straight leading edge and a generally convex trailing edge.... | 05/28/1985 |
| 4439108 | Windmill having centrifically feathered rotors to control rotor speed A windmill including a hub, at least a pair of rotor roots rotatably coupled to the hub and rotor blades mounted on respective rotor roots, wherein wind forces produce rotation of the blades, the roots and the hub around an axis of rotation passing throug... | 03/27/1984 |
| 4332526 | Variable pitch propellers A variable pitch propeller e.g. for light aircraft has blades which are mounted in a hub for rotation about their longitudinal axes. The ends of the blades entering the hub have a crown of peripheral teeth meshing with axially slidable racks located at th... | 06/01/1982 |
| 4304524 | Marine propellers A variable-pitch marine propeller comprises helicoidal blades 6 each mounted on a hub 1 to freely pivot about radial axis 25 spaced in front, in the direction of rotation, of the center of pressure of the blade 6 whereby water pressure acting on the blade... | 12/08/1981 |
| 4285637 | Propeller assembly A propeller assembly is provided in which the propeller blades are adjustable both rotatably and longitudinally. Pitch angle of the propeller blades may be adjusted by rotating the blades in the hub of the assembly. The outer diameter of the propeller bla... | 08/25/1981 |
| 4257740 | Speed governing hub for windmill An improved speed governor is disclosed for feathering a plurality of blades on a windmill. Each blade is attached through a rotatable shaft to a support plate which in turn drives an output shaft. Each blade shaft is connected through a control rod to a ... | 03/24/1981 |
| 4249863 | Surface aerator impeller Several forms of surface impeller for aeration of liquids are disclosed. All of the forms are of the shrouded or closed turbine type. In one form, the impeller has a large-diameter flat steel horizontal upper disc adapted to be secured to the lower end of... | 02/10/1981 |
| 4242046 | Fan spider with rake angle A sheet metal construction for a fan spider. The spider arms each carry an integral rib running centrally along the arm and each rib is flat on its upper surface to mount a fan blade. The novelty of the invention resides in canting forwardly the spider ar... | 12/30/1980 |
| 4236083 | Windmill having thermal and electric power output A windmill having thermal and electric power output and including windmill blades rotatably mounted and connected to a speed increaser mechanism of gears and shafts and a centrifugal compressor connected to the windmill thru the speed increaser to be driv... | 11/25/1980 |
| 4184654 | Rotor aircraft An aircraft useful as a toy or as a personal craft which includes a plurality of blades freely rotatably mounted on a spherical body supported by landing means. The blades are hinged onto arms to swing up and down for upward flight or downward landing. Fu... | 01/22/1980 |
| 4163631 | Surface aerator impeller Several forms of surface impeller for aeration of liquids are disclosed. All of the forms are of the shrouded or closed turbine type. In one form, the impeller has a large-diameter flat steel horizontal upper disc adapted to be secured to the lower end of... | 08/07/1979 |
| 4155602 | Trash removal apparatus for sugar cane harvesters Trash removal apparatus in a sugar cane harvester comprises an axial flow extractor fan having multiple blades to draw trash out of harvested cane and to discharge it through a duct on the pressure side of the fan. The duct is in the form of a helical tra... | 05/22/1979 |
| 4116585 | Self-adjusting wind machine A plurality of blades are rotatably affixed to a rotatably mounted shaft and overlap each other in a plane perpendicular to the axis of the shaft in a strong wind force. In a weak wind force, the blades rotate to large angles with the axis of the shaft.... | 09/26/1978 |
| 4029434 | Variable pitch mounting for airfoil blades of a windmill or propeller A blade mounting having journal and thrust bearings locating the blades in a hub to relieve load and therefore friction by a torsionally flexible tension member secured within each blade so that centrifugal forces of the blade are transmitted directly to ... | 06/14/1977 |
| 3938463 | Inclined raked partially submerged propellers A highly efficient system for propelling high speed water borne craft is closed. The use of an inclined shaft which permits an efficient machinery arrangement is facilitated by driving the vessel by a unique propeller which is designed to operate while p... | 02/17/1976 |
