Abstract: A subassembly of an electric motor and a fan for use in an air conditioner includes a centrifugal fan adapted for rotation about a longitudinal axis. The fan has an open inlet end at one longitudinal end thereof and convex closed end partition defining a cup-shaped space at the other axial end thereof. The fan motor includes a housing having an axial length and a width and a drive shaft extending from one axial end thereof. The closed end partition of the centrifugal fan has a centrally disposed axially extending opening therethrough through which the drive shaft of the motor is adapted to be received and operatively attached. The width of the motor housing and the cup-shaped space are sized to allow a substantial portion of the axial length of the motor housing to be received within said cup-shaped space when the drive shaft is operably attached to the partition.

Abstract: A centrifugal multiblade fan comprises a plurality of curved blades which are circularly arranged about a common rotation axis at evenly spaced intervals defining a curved air flow passage between every neighboring blades. Each curved blade has concave front and convex rear surfaces which extend longitudinally in parallel with the rotation axis. A lower annular end plate is provided for putting thereon lower ends of the circularly arranged blades. A radially outside part of each curved blade has a radius of curvature which is greater than that of a radially inside part of the blade. A slit extends longitudinally parallel with the rotation axis at a radially inside portion of each blade.

Abstract: A centrifugal blower wheel having an indivisible prime number of peripherally spaced blades projecting upwardly from the top surface of a generally annular-shaped base plate. Each blade includes a tapered portion extending along an inside edge of the blade to approximately 1/3 to 1/2 the length of the blade. A hub is centrally located on the top surface of the base plate and surrounded by the inside edges of the blades, the hub curving upwardly from the top surface of the base plate to form a smoothly contoured curve.

Abstract: A mechanism and method for generating lift with the Bernoulli Effect. A pair of cylindrical impellers create a pair of counter rotating forced linear vortices. Fast moving, low pressure air surrounding the forced vortices comes into contact with the upper sides of semicylindrical lifting surfaces. Higher pressure, slower moving air is in contact with the lower sides of the lifting surfaces. The velocity differentials between the upper and lower sides of the lifting surfaces cause a pressure differential that produces lift.

Abstract: A blower wheel assembly and method is characterized by a steel hub with protruding lugs that mate with a corresponding array of holes in a backplate of the assembly. The lugs are riveted or otherwise deformed to upset the lug material, thereby permanently and securely attaching the hub to the backplate. The lugs are formed on the hub by a cold heading process whereby the hub is forcefully impacted by a heading punch or die which has recesses in it corresponding to the shape and configuration of the lugs. The impact causes the hub to deform, with the steel flowing into the recesses of the die, thus forming the lugs.

Abstract: A trussed cross-flow blower comprising truss elements on the inside of a cylindrically-shaped cross-flow blower element form at least three trusses which provide rigidity to the blower element. Preferably three trusses are provided, and they are located at radial 120.degree. spacings.

Abstract: A transverse fan includes a pair of end plates each having an annular shape, a plurality of blades annularly disposed between the end plates and a plurality of partition plates each having an annular shape and disposed at intermediate portions of the blades. Each of the partition plates has one side surface to which base ends of the blades are integrally secured to extend forward with a predetermined inclination and form a multi-blade impeller. A plurality of the multi-blade impeller are stacked axially so that each of the partition plates has another one side surface to which leading ends of the blades of adjacent multi-blade impeller are connected, and one of the end plate has one surface to which the leading ends of the blades of a leading end side one of the stacked multi-blade impellers are connected and another one of the end plates has one surface to which the base ends of the blades of a base end side one of the stacked multi-blade impellers is secured.

Abstract: An inner diameter (d.sub.2) of a centrifugal-type multiple-vane fan at a side where the motor is inserted (i.e., the insertion side) is larger than an inner diameter (d.sub.1) of the centrifugal-type multiple-vane fan at a side where the motor is not inserted (i.e., the non-insertion side), such that the ratio of a difference between an outer diameter (D) and the inner diameter (d.sub.2) of the centrifugal-type multiple-vane fan of the insertion side to a difference between the outer diameter (D) and the inner diameter (d.sub.1) of the centrifugal-type multiple-vane fan of the non-insertion side is in a range of 0.6-0.95. Thus, a centrifugal-type blower having the centrifugal-type multiple-vane fan can obtain a desired air volume while maintaining a small size of the centrifugal-type blower.

Abstract: Apparatus for peripherally supporting the rotor of a fluid driven turbine and for power take-off of energy by transformation of peripheral speed of the rotor to use such as to drive one or more electric generators to provide electric power output as determined by available wind energy.

Abstract: A cooling fan for an AC generator of a motor vehicle implemented in light weight and having a high cooling capability with generation of noise being suppressed to a minimum. The cooling fan is composed of a metallic base plate, blade members of a synthetic resin material fitted on elongated core members each having a small width and formed by bending projecting portions of the base plate and a fan guide fixedly secured to the core members at top end thereof by welding.

Abstract: A blower means is provided by a cross flow fan 4 in which a plurality of axially extending blades 13 are arranged in rows in a circumferential direction and connected axially with connecting plates 14 interposed therebetween. The cross flow fan 4 is positioned generally horizontal in a widthwise direction of the vehicle. A heat exchanger 2 is disposed on the suction side of the cross flow fan 4 and in the front-and-rear direction of the vehicle, while an air inlet port 6 and an air blowoff port 7 of a casing 1 are opened to the rear parcel panel P. The casing 1 is vertically divided into an upper casing 1a and a lower casing 1b by a plane containing a rotating shaft 5 of the cross flow fan 4. An air passage from the air inlet port 6 to the air blowoff port 7 of the casing 1 is formed into a generally U-shape.

Abstract: A transverse fan in which a plurality of blades are disposed between disk- or ring-shaped end plates in a circumferential arrangement at fixed mounting pitches in a ring-shaped configuration. Partitions plates are disposed at intermediate portions in the longitudinal direction of the blades such that each of the blades is inclined at fixed angles with respect to a fan axis and mounted at unequal pitches. The transverse fan includes a plurality of multi-bladed impeller units disposed between the disk-shaped end plates. Each of the multi-bladed impeller units has one disk-shaped partition plate having one surface on which a plurality of blades are integrally disposed along a circumferential direction thereof at unequal pitches and inclined at predetermined angles so as to extend along the axial direction of the transverse fan. A plurality of the multi-bladed impeller units are integrally stacked coaxially with each other to form the transverse-fan.

Abstract: A support for peripherally supporting the rotor of a fluid driven turbine and for power take-off of energy by transformation of peripheral speed of the rotor to use such as to drive one or more electric generators to provide electric power output as determined by available wind energy.

Abstract: This invention relates to a method to dertermine the shape of a fan blade of a sirocco fan which can improve fan efficiency and reduce the noise from flow, comprising the steps of determinating a camber line and, upper surface and lower surface of the blade by equations which define mean line and thickness distribution of NACA wing sections, respectively and determinating maximum ordinate of the camber line by following equation;Ta=2m/pwhere, Ta is leading edge angle,m is maximum ordinate of mean line and,p is chordwise position of maximum ordinate.

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: The invention relates to a separation-type air conditioner capable of increasing the heat exchanging area of a compact indoor unit and of effecting high-performance heat exchange, and particularly employable as a high-performance yet compact indoor unit whose height is low. A front heat exchanger having a configuration in which an upper edge portion and a lower edge portion are respectively made to recede is disposed in an indoor unit. In addition, a rear heat exchanger separate from the front heat exchanger is disposed on the rear surface side of the front heat exchanger. Consequently, it is possible to increase the heat exchanging area in an indoor unit having the same height, and improve the heat exchanging capacity.

Abstract: A transverse fan impeller (10) having blades (31) that extend longitudinally parallel to the rotational axis of the impeller. Each blade has an airfoil cross section, defined by a chord line (Ch) and a camber line (Ca), and is positioned in the impeller at a setting angle (.GAMMA.). The outermost edge (Eo) of each blade is located at a distance (Rmax) from the rotational axis (Ar, Ar'). The angular spacing (.SIGMA.) between blades in the fan is uniform. Among the blades of the impeller, the values of at least one of the parameters distance from outermost edge to rotational axis (Rmax), length of chord line (Ch), maximum deviation of camber line from chord line (Dmax) and setting angle of blades vary randomly from reference values of these parameters. The random parametric variations reduce the blade rate tonal noise produced by a fan having such an impeller as compared to a fan having an impeller with uniform blade parameters.

Abstract: A ventilation system for a car including an outside air channel, an interior air channel, and a radial fan having a suction side and an exhaust side. The fan is situated at junction between the outside air and interior air channels, so that the outside air and interior air channels are axially connected to the suction side of the fan. A partition wall is movable within an unrestricted cavity, so that the outside air and interior air channels are situated at different sides thereof.

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 blower blade assembly has a plurality of blades, at least one of which is provided with a counterbalancer. The counterbalancer is of one-piece construction and includes a first arm having two contact areas spaced apart from each other and adapted to contact the first surface of the fan blade when the counterbalancer is mounted on the fan blade, a second arm having one contact area adapted to contact the second surface of the fan blade when the counterbalancer is mounted on the fan blade, and an elastic connecting bridge connecting the first and second arms together.

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 multi-layer disk fan with blades operates quietly. The multi-layer disk fan with blades is formed by laminating a multiplicity of annular disks in a measured spaced relation, the arrangement having such a feature that a multiplicity of blades are interposed between the annular disks and the ends of the respective blades. The blades are further positioned a circumferentially measured spaced apart distance inward of the outer peripheral edges of the annular disks. Turbulent air flow caused by peeling-off at the tips of the blades through the effect of laminar flow by the disks is effectively prevented. Likewise, distortion in outlet speed at the outer peripheral edges of the annular disks is controlled, reducing noises from turbulent flow and interference and resulting in quiet operation.

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: This invention provides a heating/cooling system including a heating/cooling apparatus, the apparatus comprising a blower unit connected to a heat exchanger unit and both units are enclosed within a duct structure which is continuous from an upstream input end to a downstream output end. The blower unit comprises an electric motor direct-coupled to an impeller and the heat exchanger unit comprises a heat transfer assembly and both blower and heat exchanger units are of a size and configuration as to facilitate their mounting within the space defined by, for example, a pair of building floor joists. The space between the floor joists may be enclosed to function as a return air duct to the apparatus. The heating/cooling apparatus may be adapted for humidifying and dehumidifying air being pumped through the apparatus by the blower unit.

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 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: In a pump impeller structure employing a plurality of vanes arranged on the periphery of an impeller hub in a substantially radial direction of a pump shaft having a driving connection with the impeller, each vane including a particular geometry of a pressure surface therein. The pressure surface is formed concave in such a manner as to increase an angle defined between two tangential lines on a point of the pressure surface, form the innermost end of the vane to the outermost end of the vane, one tangential line being perpendicular to a straight line drawn in the radial direction of the impeller from the center of the pump shaft to the point on the pressure surface and the other tangential line being drawn along the contour of the pressure surface, both of the tangential lines being included in a same rotational plane of the vane.

Abstract: An impeller of a multiblade blower having at least two circular end plates or partition plates spaced apart from each other, and a plurality of blades disposed between the peripheral portions of the partition plates. Each of the blades is formed with a cylindrical portion having a uniform cross-sectional area, at the outer peripheral end thereof on the outer peripheral side of the impeller. The cylindrical portion has a diameter which is larger than the thickness of the blade at the outer peripheral end thereof so that the cylindrical portion is projected from both front and rear surfaces of the blade at the outer peripheral end of the latter.

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: 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 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: The discharge hood of an agricultural combine has a housing suspended from the bottom thereof in disposition for receiving straw from straw walkers of the combine into a rotary chopper which impacts the straw and propels it rearwardly out through a spreader, while at the same time creating a current of air flowing through the housing. A second inlet positioned forwardly adjacent the straw inlet of the housing is located to receive a stream of chaff from a forwardly disposed chaff discharge of the combine so that both the chaff and the straw are passed through the chopper, admixed into a single stream, and propelled upwardly and rearwardly from the combine to be strewn and scattered across the ground behind the advancing machine. A booster fan adjacent the chaff discharge augments the air suction created at the chaff inlet of the housing by the high-speed chopping rotor to assure conveyance of the light chaff particles across the free space between the chaff just discharged and the chopper housing.

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: Two embodiments of V-belt tensioning devices are employed in a cooling system of a vehicle having an engine (20) transversely mounted for rocking motion relative the vehicle frame (42). The cooling system includes an engine cooling radiator (22) mounted forwardly of the engine and substantially parallel to the rotational axis of the engine crankshaft; a cross-flow fan (24) having a rotational axis fixed against movement relative to the vehicle frame, substantially parallel to the crankshaft axis, and between the crankshaft axis and the plane of the radiator; a V-belt drive (32, 34 36) for rotating the fan in response to rotation of the crankshaft; and the two embodiments of the tensioning devices which maintain the V-belt tension as the distance between the crankshaft and fan axes varies in response to rocking motion of the engine. In one embodiment the tensioning device (90) is a split pulley (36). In the other embodiment the tensioning device (108) is a spring loaded idler pulley (110).

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: The invention relates to a radial fanwheel, wherein the fan blades are connected to a hub by spokes. Each fan blade is connected by connecting elements to the adjacent fan blades in the vicinity of their ends. Specifically, the spokes and connecting elements, as well as the fan blades themselves, are elastically deformable by the loads which develop.

Abstract: A rotary wing device adapted to be rotated about its longitudinal axis and to be propelled forwardly with its longitudinal axis having a small upward pitch angle relative to the forward flight direction in order to generate an upward lifting force on the device. The rotary wing device has a plurality of laterally spaced-apart cylindrically disposed wing segments. Preferably, the wing segments are parallel to each other, are parallel to the longitudinal axis of the device, and have streamlined edges. Preferably, the wing segments are mounted for rotation about the longitudinal axis of the device by front and rear mounting rings which engage and stabilize the front and rear tips of the wing segments. The mounting rings are perpendicular to the wing segments and have streamlined edges. The preferred embodiment is a throwable aerial toy having its center of mass located on the forward half of its longitudinal axis and being statically and dynamically balanced relative to said longitudinal axis.

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: A windmill is disclosed, the windmill including a vertical shaft mounted for rotation about its longitudinal axis, a number of blades spaced circumferentially around the longitudinal axis, and being disposed generally parallel to the axis of rotation of the vertical shaft, and supporting arms extending radially outwardly from the vertical shaft for supporting the blades. The windmill also includes a first member connected to an upper end of one of the blades and defining a first surface having a leading edge with respect to the direction of movement of the blade and a trailing edge rearward of the leading edge, the leading edge being lower than the trailing edge. The first surface also includes an inside lateral edge and an outer lateral edge spaced radially outwardly from the inside lateral edge, the inside lateral edge being higher than the outer lateral edge.

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 centrifugal fan for circulating room air characterized by an impeller supported for unidirectional rotation about a vertical axis. The fan includes a circular array of vertically oriented, radially extended blades, each blade being at its ends to a pair of end plates and characterized by a leading surface of a substantially flute-like configuration defining a forwardly opening compression chamber extended along the length thereof and communicating with apertures extended radially into the end plates, between the ends of adjacent blades defining openings for accommodating vertical streams of air flowing between the blades.

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 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.