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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 7329965 | Aerodynamic-hybrid vertical-axis wind turbine An aerodynamic-hybrid, vertical-axis wind turbine which includes a rotor airfoil and stator blade combination which maximizes energy production by increasing wind velocity and pressure while eliminating back pressure and improving the laminar flow of wind both aroun... | 02/12/2008 |
| 7270519 | Methods and apparatus for reducing flow across compressor airfoil tips An airfoil for a gas turbine engine includes a leading edge, a trailing edge, a tip, a first side wall that extends in radial span between an airfoil root and the tip, wherein the first side wall defines a first side of said airfoil, and a second side wall connected... | 09/18/2007 |
| 7182582 | Centrifugal pump with reverse rotation protection integrated on the impeller blade In a centrifugal pump (10) for liquids comprising an impeller casing (50) inside which a centrifugal impeller (40) is rotatably mounted including a hub (42) from which a plurality of curved blades (44) delimited by two curved edges... | 02/27/2007 |
| 7112043 | Compressor impeller thickness profile with localized thick spot An air foil includes a leading edge, a trailing edge, a hub contour, and a tip contour, whereby the hub contour and tip contour extend between the leading and trailing edges to define a blade surface therebetween. A localized thick spot is disposed between the leadi... | 09/26/2006 |
| 7018166 | Ducted wind turbine The performance of a turbine in a duct having a convergent and a divergent surface is enhanced by controlling the fluid flow pattern along the inner duct surface. For this purpose a free rotor redistributes part of the inner fluid stream through a ring into the oute... | 03/28/2006 |
| 7008179 | Turbine blade frequency tuned pin bank A gas turbine engine turbine blade includes a hollow airfoil extending radially from a blade root to a radially outer airfoil tip. The airfoil includes an airfoil outer wall having transversely spaced apart pressure and suction side walls meeting along chordally spa... | 03/07/2006 |
| 6960065 | Aerodynamic article with protective coating and method of bonding metal to polyurethane To protect an article with an aerodynamic surface, such as an aeroplane propeller or helicopter rotor, from erosive damage caused by flying particulate matter, a thin elastomeric protective covering is provided. This layer covers approximately 15% of a forward face ... | 11/01/2005 |
| 6905309 | Methods and apparatus for reducing vibrations induced to compressor airfoils A method enables a rotor blade for a gas turbine engine to be fabricated. The method comprises forming an airfoil including a first side wall and a second side wall that each extend in radial span between an airfoil root and an airfoil tip, and wherein the first and... | 06/14/2005 |
| 6551058 | Rotatory pump having a knobbed impeller wheel, and a knobbed impeller wheel therefor A rotatory pump has a housing (20) and an impeller wheel (40) which is mounted on a driving shaft (30) to rotate integrally therewith. The driving shaft is rotatably supported in the housing. The driving shaft also has a disk (44) disposed to be concentri... | 04/22/2003 |
| 6524078 | Pond pump with reversing means to prevent rotation in the opposite direction A pond pump having a housing (1) enclosing a synchronous motor (9) with a drive shaft (40) on which an impeller (20) is loosely fitted so that, on start up, the shaft (40) can rotate relative to the impeller (20) until a pair of diametrically opposed keyw... | 02/25/2003 |
| 6352408 | Slip inhibiting boat propeller Efficiency of a boat propeller is increased by curved flanges extending along the tips of the propeller blades. The flanges form projections at the blade tips which deflect water that flows radially towards the tips outward into the thrust producing water... | 03/05/2002 |
| 6296446 | Axial blower An axial blower includes a cylindrical hub, a driving device for rotating the cylindrical hub through a rotational shaft, a plurality of vanes arranged to an outer peripheral surface of the cylindrical hub in a circumferential direction thereof, and a plu... | 10/02/2001 |
| 6280144 | Propellers and impellers with stress-relieving recesses Propellers and impellers having multiple recesses or striations which are cast in the low-pressure face of each blade of the propeller and impeller and extend from the junction of the blade with the hub, toward the extending or distal end of the blade. Th... | 08/28/2001 |
| 6206636 | Ribbed impeller A ribbed impeller for use in a water pump and in marine water pumps in particular, which ribbed impeller is characterized by a hub rotatably mounted on a shaft positioned inside the pump barrel or housing and multiple blades provided on the hub and fitted... | 03/27/2001 |
| 6179556 | Turbine blade tip with offset squealer An industrial turbine assembly comprises a plurality of rotating blade portions in a spaced relation with a stationary shroud. The rotating blade includes a root section, an airfoil having a pressure sidewall and a suction sidewall defining an outer perip... | 01/30/2001 |
| 6142739 | Turbine rotor blades An unshrouded turbine rotor blade 24 for use particularly in gas turbine engines comprising an aerofoil 30 having a leading edge 32 and a trailing edge 34. The radially outer extremity of the aerofoil 30 having a passage 42 defined by a peripheral wall 44... | 11/07/2000 |
| 5368508 | Marine propeller with transversal converging ribs A marine propeller which includes arcuate ribs extending from each blade surface. Each rib is widely spaced at the blade's leading edge and curves inwardly towards the propeller hub to substantially converge at the blade's trailing edge. Each rib is furth... | 11/29/1994 |
| 5344235 | Erosion resistant mixing impeller In order to extend the life of mixing impellers which circulate materials, and particularly which suspend solids, in the form of particles which erode the blades of the impellers and place a practical limit on impeller speed and/or angle of attack due to ... | 09/06/1994 |
| 5302081 | Toric pump A regenerative toric pump in which undesirable noise generation and leakage through clearance gaps between the impeller and housing is minimized includes an impeller having vanes lying in general planes radiating from the impeller axis disposed at variabl... | 04/12/1994 |
| 5193983 | Axial-flow fan-blade with profiled guide fins An axial-flow fan-blade, with at least one profiled guide fin extending from the surface of each blade of the fan-blade, is able to control flow direction of the fluid and keep fluid flow speed stable; and, furthermore, offsets the centrifugal force (whic... | 03/16/1993 |
| 5181830 | Blade for axial flow fan An axial flow fan blade (11) having an enhanced tip (12, 12') to reduce or eliminate tip vortices and therefore vortex induced noise. The enhancement is a rounded body extending from the blade tip and having faired ends (15, 16) but otherwise a generally ... | 01/26/1993 |
| 5163810 | Toric pump A regenerative toric pump in which undesirable noise generation and leakage through the clearance gaps between the impeller and housing is minimized includes an impeller having vanes lying in general planes radiating from the impeller axis disposed at var... | 11/17/1992 |
| 4962937 | Apparatus for deflecting fluids leaking around pump shafts In the representative embodiment of the apparatus of the invention disclosed herein, a circular fluid deflector with a central opening to receive a pump shaft is arranged with a flat transverse face for facing the seal in the pump housing through which th... | 10/16/1990 |
| 4830315 | Airfoil-shaped body An airfoil-shaped body has a relatively thin trailing edge with a series of alternating, adjoining, downstream extending troughs and ridges in its suction surface which form wave-like surface undulations terminating at the trailing edge. The ridges in the... | 05/16/1989 |
| 4802771 | Mixing apparatus Apparatus for mixing or circulating a liquid or a liquid suspension (slurry) to provide efficiently, high head so as to enable slurries which are viscous or contain large or heavy particles or tend to agglomerate to be mixed or circulated, uses an impelle... | 02/07/1989 |
| 4764090 | Vertical wind turbine A cross wind axis type wind turbine includes four wind driven airfoil blades pivotally connected between upper and lower sets of support spokes supported on a rotating vertical column so that the blades are upwardly inclined towards the column axis to pro... | 08/16/1988 |
| 4757587 | Propeller construction of an electric fan A fan assembly includes a propeller fixedly mounted on a shaft. The propeller has a rear side where fluid enters and a front side where fluid exits. The propeller has blades with an arcuate rib located on the front side of each blade. The arcuate rib may ... | 07/19/1988 |
| 4722608 | Mixing apparatus Apparatus for mixing liquid and liquid suspension mediums in vessels with a mixing impeller shaft system of a composite of fibrous and plastic material of a structural configuration to enable the use of such material in commercial and industrial applicati... | 02/02/1988 |
| 4693673 | Ceiling fan A ceiling fan having a plurality of fan blades which generate axial air flow and which include vane portions positioned angularly to the surface of the blades which direct air flow radially from the blades to increase the range of circulation of the air i... | 09/15/1987 |
| 4664593 | Blade configuration for shrouded motor-driven fan A motor-driven fan including a hub adapted to be driven by a motor, a plurality of fan blades provided on the hub to extend in radial directions, a shroud including a ring-shaped portion encircling the fan blades and stay members for supporting the ring-s... | 05/12/1987 |
| 4662823 | Air turbulence blades for ceiling fans Supplemental blade attachments which are mounted to the end portions of the primary blades of conventional ceiling fans and which are of a configuration to establish a greater dispersion of air with respect to the fan by creating air turbulence which is d... | 05/05/1987 |
| 4640668 | Ceiling fan with adjustable blowing scope thru a speed-servo and with driving speed control means A ceiling fan with adjustable blades and equipped with a motor including a centrifugally controlled motor speed control. The motor speed control includes an adjustable, centrifugally controlled electronic switch.... | 02/03/1987 |
| 4568242 | Cooling fan for automobiles A cooling fan for automobiles which is drivable by an electric motor includes a plurality of blades, each having distal and proximal ends inclined at attachment angles larger than an attachment angle at which an intermediate portion of the blade is inclin... | 02/04/1986 |
| 4560321 | Ceiling fan A ceiling fan includes auxiliary vanes pivotally connected to the opposite ends of its main vanes, wherein each auxiliary vane is pivotally connected to a common bracket unit through a pull rod at its opposite end to the main vanes. The bracket unit is ca... | 12/24/1985 |
| 4530644 | Device for deriving energy from a flowing medium Each radially extending blade (12) of a wind motor is fitted near its tip with an auxiliary vane (13) which can result in an increase of efficiency. Different from known devices each auxiliary vane (13) is placed with respect to the blade (12) so that the... | 07/23/1985 |
| 4468130 | Mixing apparatus The mixing of liquid and liquid suspensions in vessels is obtained by a mixing impeller mounted on a shaft and rotated by a drive which delivers selected speed and torque. The torque and power needed to obtain given flow is minimized by a low-cost impelle... | 08/28/1984 |
| 4456431 | Axial ventilator with protected blades A ventilator according to the invention comprises at least two blades fixed to a hub adapted to be made integral with a motor shaft, a protection grille integral with said hub, protecting the front of the ventilator and being extended on the periphery of ... | 06/26/1984 |
| 4396351 | Engine cooling fan An engine cooling fan driven by an engine and located in a shroud extending from a radiator to the engine including a hub having a cylindrical rear end portion for mounting the fan on the engine, a plurality of blades provided on the hub and a ring fixedl... | 08/02/1983 |
| 4362469 | Device for deriving energy from a flow of fluid Improved process and device for extracting energy present in a flowing fluid medium wherein a supported hub with propellers or blades is placed in said medium and the blades are provided with a wing or vane at the tip. The wing is of such a form that it g... | 12/07/1982 |
| 4329115 | Directionally stabilized wind turbine A downwind rotor wind turbine having a rotor with a horizontal axis carried for operation on the downwind end of a pod or nacelle pivotally mounted on a vertical pivot located upwind of the rotor on the top of an elevated structure. Each blade is provided... | 05/11/1982 |
