Abstract: A centrifugal blower wheel is provided with forward-curved multi-blades comprising a pair of end rings, a plurality of blades and a disk. By separating the blades into "vane members" which assume the function of a fluid device and "vane attachment members" which assume the function of a high speed rotating device, there is a greater degree of freedom of design, so optimum materials and shapes can be assigned to these different functions. The end rings, vane attachment members and disk are therefore constructed of metal and provided with beads so as to give a highly rigid structure, while the vane members are constructed of non-metal. This makes it possible to provide a blower wheel which is more lightweight and quieter in operation than a conventional blower wheel.

Abstract: A reaction turbine capable of providing unidirectional rotation under a reversible fluid flow is disclosed. The turbine comprises inflow and outflow fluid channels, a turbine chamber, and a working wheel with a plurality of airfoil-shaped blades mounted transversely to the direction of fluid flow for rotation in a plane parallel to the fluid flow. A channel directs the fluid flow to the blades. In the turbine chamber, the channel has a curved configuration having opposed changes in elevation or bulges directed towards the center of the turbine in a plane parallel to the flow of fluid to optimize the angle of attack of the fluid on the blades. In one embodiment, the channel also has a V or other linear or non-linear shape in transverse cross-section in the turbine chamber to smooth and direct the fluid flow. In another embodiment, the blades have a delta or other curvilinear shape, which smooths and directs the fluid flow and allows the channel to have a simpler rectangular cross-section.

Abstract: A reaction turbine capable of providing high speed unidirectional rotation under a reversible ultra low head pressure and/or high velocity fluid flow is disclosed. The turbine comprises a working wheel with a plurality of airfoil-shaped blades mounted transversely to the direction of fluid flow for rotation in a plane parallel to the fluid flow. The blades are arranged in a helical configuration, a modification of a delta turbine, which ensures that a portion of the blades are always positioned perpendicular to the fluid pressure, thereby creating maximum thrust to spin the turbine and ensuring a continuous speed of rotation with no accelerations and decelerations. The skewed leading edges further reduce resistance to the turbine rotation. A channel having a rectangular cross-section may be provided to direct the fluid flow to the blades.

Abstract: A device for preventing noise in an air conditioner including a stabilizer with different inclination angles correspondingly with the different segments of the lateral blowing fan, so that the blades of the segments of the lateral blowing fan pass the stabilizer not simultaneously but sequentially, thereby reducing noise of the revolving blades to a great degree. The device can be applied not only to separate type air conditioners but also to all types of blowing devices using lateral blowing fan and cirrocofan.

Abstract: The present invention provides a mixing impeller including a plurality of blades circumferentially mounted to a frame around the mixing impeller with adjacent blades being opened from one another. The blades are secured to the frame in a manner such that at least part of each blade extends outwardly of the frame to guide discharge of fluid passing through the impeller away from the frame and substantially eliminate any turbulence that the frame might otherwise create. In addition, the frame has a rearwardly inwardly tapering configuration with each of the blades having the same inward rearward taper as that of the frame. This combination of features substantially reduces turbulance of the outward flow of liquid from the impeller relative to conventional impeller designs.

Abstract: A centrifugal fan assembly consisting of a number of centrifugal fan units. Each of the centrifugal fan units comprises (a) an annular member with a first side and a second side, (b) a number of blades integrating with and extending from said first side, (c) a number of grooves formed in said second side of said annular member, (d) a first device for guiding said blades formed on one centrifugal fan unit to enter in said grooves formed in another centrifugal fan unit even if there is a slight circumferential misalignment of said blades formed on one centrifugal fan unit between said grooves formed in another centrifugal fan unit and (e) a second device for guiding said blades formed on one centrifugal fan unit to enter in said grooves formed in another centrifugal fan unit even if there is a slight radial misalignment of said blades formed on one centrifugal fan unit between said grooves formed in another centrifugal fan unit.

Abstract: A transverse fan impeller (30) having at least two modules (32). Each module is defined by an adjacent pair of partition disks (34) each perpendicularly centered on the rotational axis of the impeller. Blades (31) extend longitudinally between pairs of partition disks. The angular spacing of blades in a module is nonuniform but also not random, being determined by application of certain formulae disclosed. The angular blade spacing within each module of the impeller is the same, but the modules are angularly offset so that a blade in one module is offset from the corresponding blade in an adjacent module by a predetermined value. The module and blade configurations reduce both the blade rate tonal noise and overall radiated noise produced as compared to an impeller having uniformly spaced blades.

Abstract: A wind turbine is arranged to provide for a front torroidal plate mounted from and spaced relative to a rear solid plate coaxially securing a deflecting cone coextensively and coaxially between the front and rear plate, with a series of equally spaced arcuate impeller blades mounted adjacent a periphery of the front and rear plates exteriorly of the cone to direct air flow through the turbine plates from the cone structure. The impeller also has a fluidic rotation indicator. The indicator is a set of arcuate liquid chambers which contain two different fluids of different colors and specific gravities. When the impeller is stationary, the two different fluids separate, indicating two colors. However, when the impeller rotates, the two fluids mix and indicate a single third color.

Abstract: A transverse fan assembly including a plurality of elongated fan blades arranged in a cylindrical array and a plurality of axially spaced and generally aligned discs of substantially uniform diameter. Each disc defines equidistantly spaced slots concentric with and inwardly of the disc periphery for allowing the blades to loosely pass therethrough. Each blade is individually attached to a disc by a blade retainer which, in response to an individual twisting action upon the blade, releasably and individually attaches the blade to the disc under a substantially constant and independent force in a manner allowing for removal or replacement of the blade without affecting other blades in the fan assembly.

Abstract: An air mixer having a rotor with upper and lower horizontally oriented blades which draws air from above and below into the interior of the rotor so that thorough mixing occurs, after which the mixed air is expelled laterally by vertically oriented blades into the surrounding area and minimizes thermal stratification and other such conditions in the surrounding area.

Abstract: A centrifugal blower assembly of the type having a finned barrel portion to be driven by a shaft by rotation about a longitudinal axis of rotation has the barrel portion divided longitudinally to provide two separable halves. A central hub assembly for securement of the barrel portion to the shaft similarly is divided in separable portions each carried by a respective barrel half. Split clamps secure the hub assembly portions about the shaft in integral relation with the shaft. End rings extending around the barrel at its ends similarly are split into half-ring portions each carried by a respective barrel half. Tongue-like brackets and associated recesses of the half-ring portions secure them in integral relation about the shaft. The blower assembly may be installed and removed from the shaft without its removal.

Abstract: An enhanced, air-flow convection oven is disclosed, comprising an oven chamber liner circumscribed by a thermally insulated outer oven shell with a heat source in a combustion chamber between the shell and the liner. Hot air flows from the combustion chamber and into a uniquely constructed blower wheel assembly. The blower assembly has a concave central plate configuration which creates a negative pressure behind the blower wheel assembly, inducing a flow of hot air from the back of the blower wheel assembly into the blower wheel assembly as the wheel rotates. This hot air is mixed with air from within the chamber to produce uniform heating throughout the chamber.

Abstract: This invention relates to an exhaust device for a kitchen hood, air purif and the like. It consists of a rigid flat disk (1), of a material impermeable to the gas flow, driven in rotation around its central axis by a drive means, said disk comprising on its front face turned toward the gas flow to be exhausted a plurality of projecting elements (2,3;2a,3a;2b,3b) arranged to form ducts (14) directing the exhausted gas flow in the direction of the periphery of said disk.

Abstract: A cleaning system for a combine having a plurality of cleaning sieves which are operated to arrange grain in a thin veil or crop mat on the sieves. The cleaning system of the present invention includes an elongated transverse cleaning fan and an air plenum. The cleaning fan is rotatably driven about a fixed axis and includes a plurality of spaced apart blades peripherally disposed about the fan. The air plenum extends parallel to and along substantially the entire length of the fan for directing a forced flow of air from the fan rearwardly through the cleaning sieves. The air plenum includes upper and lower air directing baffles.

Abstract: Boundary layer separation in a rearwardly skewed centrifugal impeller can be better controlled by designing the impeller blades with an "S" camber, i.e., with rearward curved radially extending blades in a centrifugal blower. The blades have a positive camber at a radially inward region and a negative camber at a radially outward region of the blade.

Abstract: A modified centrifugal airfoil fan wheel having a plurality of radially extending blades, a spaced back plate and front plate that interconnect each blade along the lateral edges of each blade, a center plate and a plurality of stiffeners. The center plate is spaced intermediate and parallel to the back and front plates and interconnect each blade along an intermediate portion. The plurality of stiffeners encircle and are secured to each blade at the outermost portion of the blades. The back plate, front plate and center plate each have a central concentric opening and each may have a cutout spaced between each blade. This modified design results in reduced stress during operation and an extended fatique life.

Abstract: This fan cage is formed from a plastics material and locking, locator and drive devices integral with the cage and extend from one edge thereof into a "snap fit" connection with a motor driven rotor plate. With this construction, the fan cage can be readily removed from the rotor plate for inspection and replacement as required.

Abstract: A fan (10) adapted to be driven by an electrical motor (12), the motor of the type having openings (14) to permit the flow of air therethrough to cool internal components of the motor. The fan comprising a cup-shaped hub (20) adapted to be driven by the motor and including a plurality of arcuately shaped webs (44, 70) for inducing the flow through the motor and through a plurality of openings (40) formed in a axially extending wall (28) of the hub (20).

Abstract: A centrifugal blower wheel consisting of a wire hoop, a disk member and a plurality of separate blower blades arranged about the periphery of the wheel are operatively connected to the hoop and the disk member by a flange formed on each end of the blades. The flanges are rolled around the hoop, hoops or hoop and disk member such that the blades are operatively spaced around the periphery of the wheel.

Abstract: A turbine alternator comprising a central clear optical path through which certain objects or optics may pass unimpeded. This design features a means for internal safe arming of the munition in which the turbine alternator is contained. In addition, this turbine alternator features a rotating stator and stationary windings.

Abstract: An impeller for a rotary fluid machine of the centrifugal type is disclosed which is adapted to be constructed as a liquid pump or gas compressor. The impeller comprises a disc having a boss which is fitted on a drive shaft, and a plurality of blades which are uniformly spaced apart circumferentially and axially project from at least one side of the disc. Each blade has a front and a rear surface, and a fluid path is defined between the front surface of a blade and the rear surface of an adjacent blade. The fluid path is arranged to extend from around the boss to the outer periphery of the disc. The width of the fluid path decreases gradually from around the boss toward the outer periphery of the disc, but the fluid path has a constant depth. The front and the rear surface of each blade are substantially arranged along circular arcs having different radii of curvature which are struck from a common center point.

Abstract: A fan is disclosed that contains cut-outs that reduce the noise levels. The fan is used to cool circuit boards.

Abstract: An evaporative cooler blower rotor-shaft securing hub adapted to re-secure a failed blower rotor bushing attaching to the blower rotor central shaft comprising a pair of steel straps having a half circle formed in each, said steel straps adapted to encircle and hold the central shaft in fixed relationship, and a pair of concentric half circle flanges with attached right angle brackets, said right angle brackets adapted to be attached to said central shaft securing steel straps, and said concentric half circle flanges adapted to be secured to said blower rotor bushing whereby the concentric half circle flanges secure the blower rotor bushing to the steel straps encircling the central shaft, and the steel straps secure against the central shaft whereupon the blower rotor bushing is re-secured to the central shaft.

Abstract: Centrifugal fans are provided comprising impellers having backward inclined blades that are cambered radially inward and that are inclined at an angle less than about 40.degree. relative to the tangential direction of the midpoint of a chord connecting the leading and trailing edges of each blade.

Abstract: Blower wheel apparatus for squirrel cage type blowers includes flexible hubs with integral collars for fastening the blower wheel onto a rotating shaft so that the hubs and collars may be moved inwardly for inserting the blower wheel into a housing and then moved outwardly for securing the blower wheel onto the shaft after the blower wheel and shaft are disposed in the blower housing.

Abstract: A transverse flow fan rotor for the cleaning and separating system of a combine harvester and for other uses features a lightweight yet sturdy rotor structure which eliminates the need for machined shaft keyways, keys, set screws and pins for attaching rotor discs to a drive shaft. The discs are frictionally clamped to the shaft by the action of split tapered lock bushings and coacting opposing collars on opposite sides of each disc drawn together by bolts.

Abstract: An impeller assembly for use in a blower structure including a blower wheel which defines a centrally located peripheral groove in which a special endless metallic pulley band is fixedly mounted and having a hub sleeve which is demountably carried on a tubular axle shaft which demountably carries a stub shaft in each of its opposite ends for rotatable journalling in the bearings of the blower structure.

Abstract: Disclosed is a vehicle having a transversely mounted engine (20), an engine cooling radiator (22) mounted forward of the engine and substantially parallel to the rotational axis of the engine crankshaft, a cross-flow fan (24) mounted for rotation about an axis substantially parallel to the crankshaft axis and between the crankshaft axis and plane of the radiator, and a mechanical drive (32, 34, 36) which rotates the fan in response to rotation of the crankshaft.

Abstract: A line of forwardly curved blower wheels of different diameters incorporates blades of the same angular extent in all wheels but with the radii of curvature of the individual blades proportional to the diameter of the wheel wherein they are incorporated. In addition, the center disks of the double inlet wheels and the end plates of the single inlet wheels are provided with novel mounting structure comprising segments bent out of the plane of the disk or end plate and secured to opposite ends of the hub member by which the wheel is mounted on a shaft, and the individual blades are retained in complementary slots in the disk or plate and fillet welded to the disk or plate respectively.

Abstract: In an axial-centrifugal flow impeller, a deflector ring is interposed between the impeller hub and the peripheral cage blades in order to redistribute the air flow discharged from the hub region of the impeller along the entire axial length of each impeller blade thereby eliminating air flow concentration at, and premature wear of, the root portions of the impeller blades. A 45.degree.-angle weld fillet ramp is annularly defined along the radially inner juncture of the deflector ring and the impeller support plate for simultaneously deflecting the air flow radially outwardly and axially rearwardly, along with the deflector ring, in a non-turbulent manner. Hard surfacing material is weld deposited over the deflector ring and fillet ramp for partial protection purposes as well as for forming guide vanes aligned with the impeller blades, and hard surfacing material is also deposited upon the trailing edge portions of the blades for increasing the wear resistant properties thereof.

Abstract: A rotor for radial fans wherein the blades which are secured to the peripheries of the end walls surround or are surrounded by a spirally wound rod. The end portions of the rod are fastened to the end walls so as to maintain the median portion of the rod in prestressed condition. The rod enhances the resistance of the rotor to torsional stresses.

Abstract: A fan having forward-curved blades, such as a sirrocco fan or cross-flow fan, wherein the width of the outlet of an air passage between the adjacent two blades is 0.28 to 0.52 of the pitch of the blades at the inlet of the air passage, and the width of the inlet of the air passage is 0.85 to 1.2 of the width of the outlet thereof. The fan having blades of this construction has improved efficiency and reduced aerodynamic noise level in operation.

Abstract: A conical shaped rotor is described for rotation about a horizontal shaft axis for responding to or creating a moving airstream. The rotor is elongated and conical shaped along the rotor axis with elongated blades extending longitudinally and radially inward from an enlarged end to a reduced end. The blades are angularly offset between 1.degree. and 15.degree. from the rotor axis to cause an inner side edge of each blade to be closer to the rotor axis than an outer side edge without the blades being twisted about their longitudinal axis. In one form an electrical generator is operatively attached to the rotor shaft for generating electrical energy in response to the rotation of the rotor by wind passing therethrough. In a second form the rotor is driven by a motor to create an air flow therethrough to serve as a fan.

Abstract: Rotary turbine ventilators, wherein the vanes are connected to the base ring of the rotary element by a crimping or swaging operation instead of by welding or riveting. The method of manufacturing the ventilators is particularly adapted to the manufacture of aluminum ventilators because of the saving of labor and cost which results when aluminum ventilators are made thereby, although the method may be used to manufacture ventilators of other materials.

Abstract: A fan rotor for a crossflow fan is provided wherein a number of fan rotor units, having an identical or a different length and comprising a set of end discs and intermediate discs facing thereto or a set of intermediate discs confronting each other and a blade drum rigidly connecting said confronting discs, are aligned so that their intermediate discs abut each other and the abutting discs are rigidly secured together by their respective relative movements.

Abstract: A machine for assembling blower rotors comprises a fixture with a cylindrical interior surface in which there are shallow, axially spaced, radially inwardly opening circumferential grooves. The grooves receive marginal portions of flat sheet metal discs that have blade slots opening to their peripheries, thus holding the discs in spaced, coaxial relationship and allowing them to be indexingly rotated, ratchet-fashion, by pawls that engage circumferentially facing edges on the discs. Indexing rotation brings a slot in each disc into alignment with a blade guiding surface on the fixture, and a pusher moving along that surface forces individual blades edgewise along it and into the discs.

Abstract: A rotor for a cross-flow blower has narrow elongated blades fixed in slots in the peripheral portions of a plurality of parallel discs spaced from one another along the rotor axis. The blades have curved cross sections, and each has creased portions received in the slots in the discs. The creased portions are formed to have supporting and stabilizing engagement with the opposite side edges of the slots and with opposite face portions of the discs adjacent to the slots.