Matches 151 - 200 out of 302 < 1 2 3 4 5 6 7 >
Match Document Document Title
5478201 Centrifugal fan inlet orifice and impeller assembly  
An inlet orifice structure and impeller assembly for a centrifugal flow fan. The inlet orifice has an elliptical cross section in a plane passing through the axis of rotation of the fan. The...
5454695 High output engine cooling fan  
A high output fan assembly for cooling the radiator of a motor vehicle. The fan assembly comprises a shaft, first and second fans, and a motor. The first fan includes a plurality of first blades,...
5423659 Shroud segment having a cut-back retaining hook  
A shroud segment for a gas turbine engine includes a hook having an undercut surface. Various construction details are developed that provide a segment having a hook with minimized bending stress....
5423660 Fan inlet with curved lip and cylindrical member forming labyrinth seal  
An improved plastic, injection-molded shroud/banded fan combination in which the shroud extends axially from an inlet portion to an outlet portion, and the outlet portion comprises means for...
5405243 Propeller with shrouding ring attached to blade  
A propeller having a central hub portion with multiple blades affixed to the hub portion and spaced around the circumference of the hub to extend outwardly therefrom is provided. An annular ring or...
5399070 Fan hub  
A fan hub is disclosed which has a hub insert for securing a shaft against relative rotation in a secure manner. The hub insert can be manufactured simply through injection molding the hub to a...
5393199 Fan having a blade structure for reducing noise  
A fan comprises a hub rotatable about a central axis and a plurality of blades each having a root region secured to the hub and extending radially outwardly to a tip region. Each blade is designed...
5326225 High efficiency, low axial profile, low noise, axial flow fan  
The fan blades have a particular geometry that combines high efficiency, low axial profile, and low noise in an axial flow fan. The fan also comprises a circular outer band that coacts with a...
5304033 Rotary compressor with stepped cover contour  
A compressor assembly includes a housing, and a rotatable impeller within the housing which includes a hub and blades extending from the hub. A ring circumscribes the leading edge of the blades,...
5273400 Axial flow fan and fan orifice  
A low noise axial flow fan (10/110) having a plurality of identical blades (13/113) extending from a central hub (11/111). In a preferred embodiment, each blade is highly skewed, having a backward...
5269656 High damping limp propeller  
A limp propeller for underwater use with a high mechanical damping ability o absorb so-called broadband vibration noise is comprised of a fabric-like material, preferably made of braided high...
5249927 Profiled annular hoop for a fan helix and its application to vehicle motorized fans  
The profiled annular hoop for a fan helix blade tip exhibits a curved inlet collar whose convexity is directed towards the axis (100), and is characterized in that this collar (11) has a given...
5248224 Orificed shroud for axial flow fan  
A shroud for an axial flow fan having an orifice designed to improve the overall flow efficiency of the fan. In preferred embodiments, the shroud is generally toroidal in form with a cross section...
5244347 High efficiency, low noise, axial flow fan  
The fan has an outer circular band that is spaced axially rearwardly of the hub. Forwardly skewed blades extend between the band and hub. Each blade has a radially intermediate portion that has...
5244548 Multi-cathode ECM apparatus, method, and product therefrom  
An apparatus for electrochemically machining a workpiece having first and second platforms and an airfoil extending transversely therebetween includes a first cathode trio having a center cathode...
5234318 Clip-on radial tip seals for steam and gas turbines  
A tip seal arrangement is provided for steam and gas turbines that allows the tip seals to be mounted on shrouds in such a way as to be easily replaceable while ensuring a minimum of contact...
5221187 Axial fan, particularly for motor vehicles for agricultural use  
In an axial fan, the angle of curvature of the median line of each blade in axial projection is nil at the hub and for about one third of the radial extension of the blade from the hub. The blade...
5183382 Low noise rotating fan and shroud assembly  
The present rotating fan and shroud assembly reduces noise emitted therefrom and increases cooling system efficiency. The rotating fan and shroud assembly when combined with the labyrinth-type seal...
5096382 Ring-shrouded propeller  
The ring-shaped propeller, in its basic form, comprises a multi-blade propeller and a structurally continuous ring-shroud attached to the tips of the blades. The shroud has an airfoil cross-section...
5082465 Air thrust propulsion boat-drive train  
A drive train for an air thrust propulsion boat which has a propeller encircled by a noise reducing and efficiency increasing shroud. The shroud and propeller rotate about a generally vertical axis...
5044884 Safety propeller  
An inherently safer propeller design is disclosed. A conventional propeller has a substantially cylindrical ring affixed to the distal ends of the blades. Preferably, the leading edge of the ring...
5035578 Blading for reaction turbine blade row  
A blade for a steam turbine has a concave, pressure-side surface which has a constant radius of curvature, while the convex, suction-side surface has a continuously increasing radius curvature. The...
4971520 High efficiency fan  
The invention features an axial fan for passing air through a heat exchanger, the fan comprising a hub rotatable on an axis and a plurality of blades, each of which extend radially outward from a...
4948338 Turbine blade with cooled shroud abutment surface  
A turbine aerofoil blade is provided with a shroud member at its radially outer extent for engagement with the corresponding shroud members of adjacent aerofoil blades. A cooling air duct within...
4936750 Rotor for a wind-driven generator  
The present invention refers to a rotor for a fluid-kinetic machine comprising a rotatably supported hub, the support being provided with axial bearing means, an outer ring which is indirectly...
4930984 Impeller  
An impeller comprises a central hub part, and a plurality of vanes extending from the central hb part, the plurality of vanes including two first neighboring vanes having a predetermined...
4930986 Apparatus for immersing solids into fluids and moving fluids in a linear direction  
An impeller assembly is disclosed which is arranged to produce linear flow of fluid which prohibits radial flow of that fluid. An impeller is surrounded by a hollow cylindrical section mounted and...
4915588 Axial flow ring fan with fall off  
An axial flow ring fan has improved efficiency and reduced noise by making the leading edge of each blade a generally sinusoidal shape and projecting this geometry throughout the blade by imparting...
4900229 Axial flow ring fan  
An axial flow ring fan has improved efficiency and reduced noise by making the leading edge of each blade a generally sinusoidal shape.
4871298 Falciform blade for a propeller and its application in particular in motorized fans for automobiles  
The blade (10) for a propeller constituted by a hub (20) to which the feet (12) are fixed has a leading edge (14) and a trailing edge (15) which is formed by two arcs (152, 153) having respective...
4863350 Air turbine  
An air turbine including a plurality of elongated rotor blades extending from a hub, first and second airfoils interconnecting the blades, and a vane element positioned between the airfoils, said...
4836748 Ring propeller  
A ring propeller has a frusto-conical shroud disposed co-axially about a boss, and a plurality of blades extending between the boss and the shroud thereby dividing the shroud into equal sectors....
4832570 Boat propeller having counter-rotating screws and provided with a nozzle  
A screw propeller (10) for boats includes two counter-rotating screws (12, 16) coaxial with an annular nozzle (20). The aft screw (16) has a smaller diameter than the forward screw (12) and the...
4832571 Flexible tethered wind turbine  
This invention relates to a flexible tethered wind turbine useful, among other things, for generating electricity. A flexible shaft supported by guy wires is provided at its upper end with a...
4822308 Marine steering and propulsion system  
A propeller enclosed in an open tube and attached to the tube, with the tube being driven by an engine through a ring gear rack on the outside of the tube, a stationary housing concentrically...
4789302 Propeller shroud  
A propeller shroud or nozzle, made with airfoil section of high lift to drag ratio, increases thrust, speed and efficiency of a fixed or controllable pitch propeller operating inside the shroud....
4776755 Shrouded propeller  
A shrouded propeller for operation in ice-filled waters, which arrangement comprises a propeller and a nozzle encirculating the propeller, which propeller arrangement comprises an ice crusher...
4767270 Hoop fan jet engine  
A fan jet engine assembly comprising a hoop fan surrounding a turbojet (19) is disclosed. The hoop fan includes a pair of rotatable hubs (27, 29) that encircle the turbojet. A stage of fan blades...
4747900 Method of manufacture of compressor rotor assembly  
A compressor rotor assembly comprises a shaft and at least one disc having integral radially extending aerofoil blades which disc is integral with the shaft. The assembly comprises a matrix...
4747275 Apparatus for controlling flow through a centrifugal impeller  
An air conditioner unit that includes a housing containing a heat exchanger and a centrifugal impeller positioined behind the heat exchanger for drawing comfort air over the exchanger surfaces and...
4729716 Wind turbine  
The disclosed wind turbine has a circular turbine wheel with a plurality of soft, furlable and unfurlable airfoils depending between a rim and hub. Each airfoil has associated with it a stepping...
4713027 Ringed impeller for a water jet drive  
An improved rigid impeller held for driven rotation within the housing of a water jet drive for boats. The impeller includes a hub connectable to the output shaft of a motor, a plurality of...
RE32562 Process and apparatus for mixing a gas and a liquid  
In a process for mixing a gas and a liquid in an apparatus having an axial flow down-pumping impeller located in a draft tube and preceded by a first baffle wherein a vortex and turbulence are...
4685513 Engine cooling fan and fan shrouding arrangement  
Compact fan and shroud package for radiators with fan blades curved rearwardly to position rotating shroud at optimized distance from radiator for improved air flow through radiator.
4684324 Axial fan, particularly for motor vehicles  
An axial fan in which the median line (B) of each blade (3) has a first radially-innermost, rearwardly-directed curved portion (B 1 ) and a second radially-outermost, forwardly-directed curved...
4664598 Unitized quick-assembly fan  
A cooling assembly including a fan blade subassembly for receipt about a drive shaft and a protective shroud secured to the fan blade subassembly for rotation therewith.
4655686 Air conveying device on a radiator for water-cooled internal combustion engines  
An air conveying device is provided on a radiator for water cooled internal combustion engines. The device comprises a fan rotor supported on the internal combustion engine by means of a fan rotor...
4637801 Thrust enhancing propeller duct assembly for water craft  
A propeller duct assembly for use on water craft which enhances the thrust of the propeller, increases fuel efficiency, stabilizes boat handling, serves as a safety factor for swimmers, and which...
4624648 Aerial toy  
A rotary aerial toy comprising a tubular sleeve of flexible material and of circular cross section. In one form of the invention the tubular sleeve tapers from one end toward the other with air...
4580517 Vessel having parallel hulls with 360 degree rotatable thrusters  
The location of azimuth thruster propellers at the parallel hulls of semisubmersible offshore vessels, is arranged so the water jet from a propeller at one hull, which is occasionally directed...
Matches 151 - 200 out of 302 < 1 2 3 4 5 6 7 >