Abstract: A centrifugal fan and a rotor for a centrifugal fan comprising axial blades, straight blades, and a hub having a radius that increases as a function of distance from the fan inlet.

Abstract: A mold to mold an integral turbofanhaving a rotating plate joined to a drive motor, an outer ring concentrically disposed outside of the rotating plate with a spacing therebetween, a plurality of blades radially arranged on a front face of the rotating plate and integrally connected at rear ends thereof to the rotating plate and the outer ring, and a shroud integrally formed with front ends of the blades. The mold includes a first half having first, second and third front parts forming a front face of the rotating plate, the shroud and the outer ring, respectively, and a second half combining with the first half, and including a first rear part forming a rear face of the rotating plate, a plurality of second rear parts forming a rear face of the shroud and the blades, and a third rear part forming a rear face of the outer ring.

Abstract: A fluid flow control mechanism is provided for linearizing a fluid flow. The mechanism includes a frame having a cylindrical outer baffle which rotatably supports a plurality of propeller elements thereon. Each propeller element defines a respective sweep area as the propeller element is rotated which overlaps sweep areas of adjacent propeller elements. The outer baffle circumscribes an outer periphery of the collective sweeps areas of the respective propeller elements. The propeller elements rotate in the same direction whereby forces of curvature flow of adjacent propeller elements substantially cancel one another to linearize fluid flow through the mechanism. Additional baffles and infills within the areas of non blade sweeps may be provided for particular applications of the mechanism.

Abstract: It is the object of the present invention to provide a centrifugal blower fan capable of reducing a noise in an operating rotational speed range without degradation in blàwer performance. A centrifugal blower fan comprises a base plate, and a plurality of fan blades arranged on the base plate in a radial pattern to define a plurality of air passages between the pairs of adjacent fan blades, respectively. A portion of the base plate serving as a bottom wall of each of the air passages is formed with a plurality of through-holes.

Abstract: A turbine wheel for driving rapidly rotating tools, in the form of a circular disk or ring, configured for mounting so as to be rotatable about an axis. Disposed thereon in circular formation are turbine blades having axially parallel front and back faces curved in the radial direction. The front face has a lesser radius of curvature (R3, R4), at least in portions, than the back face. This feature allows the turbine wheel to fit into the conventional turbine housings without relatively major redesign and with, at most, slight modifications. The turbine wheel can achieve higher torque than previous turbine wheels at the required high rotational speeds. Thus, a greater quantity of material can be applied to the spraying dome or a spraying disk without a detrimental braking. Surfaces to be sprayed can be provided with a uniform coat of material in shorter time.

Abstract: A bucket tip shroud in a gas turbine includes a seal rail having a cutter tooth at one end. Bucket tip shroud creep rate can be reduced by removing the cutter tooth from the bucket tip shroud seal rail after use or with a pre-groove honeycomb shroud. Preferably, the remaining geometry matches a geometry of the seal rail within a predetermined tolerance.

Abstract: An improved impeller for a centrifugal pump is disclosed. The impeller is particularly suited for use in pumps in which a high head is required and in which only low shear forces must be applied to the fluid moving through the pump. The impeller comprises vanes which sweep an arc around an impeller axis to provide a smooth path past the impeller and through the pump. The vanes of the impeller are formed to cause the fluid moving over the vanes to apply a hydrodynamic force to the vane that opposes the force applied to the vane by fluid as the vane urges fluid through the pump. An impeller according to this invention does not require the supporting structures that are required by known impellers.

Abstract: A turbo blood pump includes a housing 1 having a pump chamber 2, an inlet port 3, and an outlet port 4, an impeller 5 disposed rotatably in the pump chamber, an upper bearing 9 and a lower bearing 10 supporting the impeller rotatably, and a driving force transmitting unit for driving the impeller to rotate. The upper bearing is supported at a position in the pump chamber below the inlet port, so that a cross-sectional area of the pump chamber in a plane including an upper end of the upper bearing and being orthogonal to a shaft of the impeller is larger than a cross-sectional area of a flow path of the inlet port at a portion where the inlet port is coupled to the pump chamber, and thus obstruction with respect to blood flow by the upper bearing is of such a degree as to be permissible from a practical viewpoint, while an impeller is supported by upper and lower bearings. Thereby, the pump is less likely to cause problems of blood stagnation and thrombus formation.

Abstract: A blade for a cooling fan is formed on an outer periphery of a rotor of the cooling fan and is curved. The blade has a convex outer surface and a concave inner surface. A curved angle of the blade between a line through the center of the rotor and a root of the convex outer surface and a line through the root and a tip of the convex outer surface is between 30° to 40°. A plane surface is formed on the concave inner surface and at a distal end of the blade. A first cutout is defined at a bottom side and a proximate end of the blade. A second cutout is defined at the upper side and the distal end of the blade.

Abstract: The present invention relates to an improved structure of a fan, which is a centrifugal fan composed of a round housing and a blade set, where each blade is spaced in equidistance and spliced in a round housing. Each blade forms a triangular conical face on one side and a flat face on the other face. While a fan is running, a blade so designed functions to guide air flow and reduce turbulence to the minimum.

Abstract: An improved impeller for a centrifugal pump is disclosed. The impeller is particularly suited for use in pumps in which a high head is required and in which only low shear forces must be applied to the fluid moving through the pump. The impeller comprises vanes which sweep an arc around an impeller axis to provide a smooth path past the impeller and through the pump. The vanes of the impeller are formed to cause the fluid moving over the vanes to apply a hydrodynamic force to the vane that opposes the force applied to the vane by fluid as the vane urges fluid through the pump. An impeller according to this invention does not require the supporting structures that are required by known impellers.

Abstract: An improved windmill and a method for generating electricity, pumped air or rotational shaft energy are provided. A vertical mast rotatably mounts one end of a substantially horizontal and upward cantilevered support arm whose other end mounts a horizontal axis stator of dual function for both the windmill and the energy generating mechanism. A rotor is mounted co-axially to the stator, being the rotor for both the windmill blades and the energy generating mechanism. Fixed windmill blades or blades which lessen angle of attack in response to increasing wind pressure are attached to the rotor. A fan shroud in the form of a band supported by fins from the stator may encircle a disk defined by the tips of the rotating windmill blades.

Abstract: A preferred embodiment of the present invention is a gas turbine engine rotor assembly having axially spaced apart forward and aft disks circumferentially disposed about an axis. The forward disk has an aftwardly extending annular forward arm and the aft disk has a forwardly extending annular aft arm. Forward and aft flanges are located at forward and aft ends of the forward and aft arms respectively. Forward and aft pluralities of aligned forward and aft bolt holes extending axially through the forward and aft flanges respectively. A scalloped annular ring having a plurality of circumferentially spaced apart tabs with spaces therebetween is disposed between the flanges. A plurality of ring bolt holes extend axially through the plurality of circumferentially spaced apart tabs such that corresponding ones of the ring, forward, and aft bolt holes are axially aligned.

Abstract: A blood pump used for extra corporeal circulation, and more particularly, as a small turbo blood pump including a casing having an interior region, an aperture formed in an upper portion defining a blood inlet, and an aperture formed in a lower portion defining a blood outlet. An impeller is rotatably mounted within said casing interior region and includes a rotary shaft and at least one vane depending therefrom. The at least one vane has an upper radius adjacent the blood inlet that is less than a lower radius adjacent the blood outlet. The base of the at least one vane forms an exterior angle of less than 90.degree. with the axis of the rotary shaft. A driven magnet is mounted to the at least one vane. The impeller is rotationally driven by a non-contacting driving magnet that is exterior to the casing.

Abstract: A deflection snubber assembly for preventing damage to a propeller which is subjected to instances of high force is disclosed. The propeller includes a hub for mounting the propeller on a shaft and a number of blades exteng radially outward from the hub. Outer tips of the number of blades are interconnected by a continuous, circular band. The propeller is constructed to accommodate a predetermined amount of deflection upon instances of high force before being permanently damaged. The deflection snubber assembly includes a housing circumferentially surrounding the propeller, the housing having a number of deflection limiting members, each of the deflection limiting members limiting deflection of the propeller to within the predetermined amount of deflection upon occurrences of the instances of high force.

Abstract: This invention includes a system and method for maintaining an impeller in a centrally located position in a pump cavity defined by an impeller housing in order to reduce noise and vibration between the impeller and the impeller housing. The system and method include situating an end or tip of the impeller in a bearing which is integrally molded onto the impeller housing at an inlet end thereof. Another embodiment illustrates the use of a locator integrally molded at the inlet end of the impeller housing and which cooperates with a locating aperture in an impeller end of the impeller to cause the impeller end to be maintained in a substantially centrally located position in the pump cavity defined by the impeller housing.

Abstract: A solid impeller is disclosed having a disk-shaped impeller body having an inlet section extending along the impeller axis of rotation. A plurality of discharge passages extend radially and having inlet and discharge ports. The inlet port has an opening verge face which is oblique to the rotational axis. The solid impeller may also comprise a disk-shaped impeller body having an inlet section extending along the axis of rotation of the impeller and plural discharge passages extending radially. It further has inlet and discharge ports which have a tapered shape so that the section area of the discharge passage is gradually reduced in the outward direction. The thickness of the body is also gradually reduced in the outward direction. The solid impeller may also comprise a cylindrically-shaped center body and plural arms on a peripheral surface of the body. These extend radially in an outward direction from the body and include a discharge passage which extends along a longitudinal direction of the arm.

Abstract: A fan is capable of directing air passing between upstream and downstream ends of the fan to flow in both axial and radial directions and includes a hub, a plurality of fan blades and a ring. The hub is shaped as a truncated cone with a wide upstream end and a narrow downstream end. Each of the fan blades has an upstream edge, an outer end and an inner end connected to the hub. The fan blades project radially and outwardly from the hub and are spaced circumferentially. The ring is disposed at the upstream edges of the fan blades and interconnects the outer ends of the latter. The ring is formed with a plurality of curved strips which extend respectively between two adjacent fan blades to permit air flow in the radial direction. The curved strips cooperate with the hub to form passages which permit air flow in the axial direction, and are shaped as sections of a parabolic surface which opens toward the upstream end of the hub.

Abstract: A centrifugal pump for conveying fluids with suspended solids has a single-blade impeller. The blade angle, as measured at the meridian line of the blade, is positive at the rear end of the blade and less than 0 degrees along a portion of the blade which extends from the front end towards the rear end of the blade through an angle of at least 90 degrees. The inner side of the blade defines a segment of a circle which is coextensive with this portion of the blade. The front end of the blade has a surface which bridges the inner and outer sides of the blade, and such surface is either flat or forms an arc having a radius of curvature substantially greater than half the blade thickness.

Abstract: 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 surrounding shroud structure to form a labyrinth air seal. The shroud structure comprises two parts that cooperatively define a radially inwardly open groove within which a flange of the fan band is received to form the labyrinth seal.

Abstract: 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 (with respect to fan rotation direction) skew in the root portion (15/115) of the blade nearest the hub, changing to a highly forward skew in the portion (16/116) of the blade near the tip. The fan may be shrouded or unshrouded. In the shrouded embodiment, the fan (110) is used in conjuncton with an inlet orifice structure (131). Each blade of the fan has a chord length (Ch) that increases from root (17/117) to tip (18/118), a pitch angle (.GAMMA.) that decreases from roto to tip and a camber angle (Ca) that decreases from root to tip. In the shrouded embodiment (110), both the contour of the inlet portion (126) of the shroud and the contour of the inlet portion (132) of the orifice structure are quarter sections of ellipses.

Abstract: A vacuum pump, denoted "VUMP", comprises a pair of nested conical or bell-shaped housings, wherein at least the outer bell-shaped housing forms a part of the pump chamber and has a central inlet. The impeller structure of the pump comprises a circular series of airfoil elements so disposed as to at least partially occupy the annular space defined by the nested conical or bell-shaped members. The airfoil elements each have a vacuum surface directed axially of the impeller towards the central pump inlet. Fluid conveyed through the pump is introduced to the central inlet and directed peripherally of the pump chamber by the inner conical member. Rotation of the circular series of airfoil elements produces a strong vacuum force within the pump that serves to impel fluid through the pump by volumetric displacement.

Abstract: A fan wheel has a cup shaped hub having an outer cup wall with a plurality of vanes and a cup bottom connectable with a shaft of a drive and provided at its inner side with a plurality of ribs defining a plurality of fields therebetween. The cup bottom in the region of the fields has a plurality of depressions extending from its inner side and having a width approximately 70% of a thickness of the cup bottom.

Abstract: An apparatus for separating and recovering floating liquid wherein one or more vortex guide plates are horizontally held on the surface of the water inhibiting their rotation, the lower members of the guide plates are submerged under the surface of the water, an enveloping cylinder at the center of vortex has its upper end suitably positioned under the surface of the water and has its lower end submerged deeper than the peripheral guide members, a suction tube for recovery is provided in said cylinder, a rotary impeller is provided under said cylinder in concentric with the vortex guide plates and is rotated in the enfolding direction of the vortex guide plates, and wherein a cylindrical cover is provided between said guide plates and said impeller, said cylindrical cover having an opening in the upper end surface thereof with its diameter being smaller than the diameter of the impeller and further being open at its lower end.

Abstract: The vanes of a radial turbine have pressure surfaces which are convex when viewed in a plane normal to the axis of rotation of the radial flow rotor and suction surfaces which are concave when viewed in the same plane. The curvature acts to promote favorable radial surface pressure gradients to assist the control of boundary layer migration in the intervane passages and also increase the structural integrity of the vane members. The otherwise flexible extremities of the vane members are stiffened by introducing the curvature, as the natural resonant vibration frequencies of the vanes are changed. The invention is also applicable to the vane members of a radial or mixed flow impeller in gas or other fluid applications.

Abstract: A pump has an impeller with a circular series of airfoil vanes rigidly mounted thereon. The impeller is mounted in a casing which has a radially outwardly increasing internal axial extent, such that fluid flowing through the pump has a less constricted path peripherally of the pump chamber than centrally of the pump chamber. In another aspect of the invention, the impeller comprises two axially adjacent series of vanes separated by a radially extending partition which divides the interior of the pump casing into a vacuum chamber and a pressure chamber interconnected by a hole formed in the center of the partition. At least one of the central partition and the impeller plate are conical in shape, thereby to impart a radially outwardly expanding axial extent to the vacuum chamber, and a decreasing axial extent to the pressure chamber.

Abstract: Aqueous slurries of particulate materials, particularly wood pulp slurries produced during the recycling of newsprint and other paper products, are processed to recover an accepts fraction in a rotary filter having a hollow cylindrical rotor. The rotor is modified to prevent plugging by outwardly tapering the inner wall of the rotor from its upstream towards a downstream end, so as to cause heavy particles tending to accumulate on the wall to flow towards the downstream end and not accumulate. At the downstream end, vane-like hub supports are provided angularly offset from the axis of the rotor to impart motion to the slurry passing through the rotor to assist in circulation of the slurry within the filter housing.

Abstract: An impeller for pumps, turbines, fans, etc., of the closed type, having a number of vanes arranged between cover discs. In order to reduce the secondary flows within the impeller, the secants between the suction side of the vane and the cover discs are displaced with respect to the intersections at the pressure side of the vane. This impeller is rotationally non-symmetrical.

Abstract: A multi-part molded plastic annular fan is formed from four pieces, each piece having upstanding fan blades and a number of integrally molded cylindrical metal sleeves through which bolts extend to mount the fan parts to a flywheel of an engine drive train. Each fan part has an interlocking member at both ends thereof which secure the fan parts together, and a bolt extends through the interlocking members to secure the fan parts to the flywheel.

Abstract: A superconducting rotor cooling system for an electrical generator includes a free vortex type pump which is located within and forms an integral part of the rotor assembly. The free vortex pump takes advantage of the centrifugal force of rotation of the cooling fluid to help the rotor winding compartment to remain in a superfluid helium state. Improved cooling results from combined natural convection, as occurs in a conventional rotor, and the superfluid heat transport which occurs at the velocity of sound.

Abstract: A fluid powered electrical generator having an impellor-rotor rotatively mounted on a central support structure. A toroidal outer support structure surrounds the impellor-rotor, with the impellor-rotor including a plurality of circumferentially spaced-apart fluid dynamic blades. The outward ends of the blades are connected together by a rotor rings which is coaxial with respect to the outer support structure. The central support structure is supported within the outer support structure by stanchions or the like so as to permit a fluid stream to flow therebetween past the fluid dynamic blades. A peripheral electrical generator having a rotor element secured to the rotor ring and a stator element secured to the outer support structure produces electrical energy as the impellor-rotor is driven by the fluid stream.

Abstract: A fluid pump including a double-entry impeller whose outer boundary is defined by a dissected spherical surface. The spherical surface includes an equatorial region which may be a groove or a cylindrical surface. The impeller is polarized magnetically and forms a dipole whose axis is normal to the plane of the equatorial region. The rotating magnetic field of a polyphase stator winding spins the impeller, and aligns the impeller spin axis along the stator axis.

Abstract: An impeller in a pump, in particular a sewage pump, the passage of which is required to have a given transmission capacity for transmitting the impurities present in the sewage water. When small volumetric flows are being pumped at great delivery lift, it would be advantageous, with a view to achieving good efficiency, to make the passage narrower than the inlet aperture, but up to date it has not been possible to do this without impairing the transmission capacity. In the impeller of the invention, this has been solved in that for achieving sufficient transmission capacity one wider point has been provided in the passage, located between the inlet and outlet margins of the impeller blade.

Abstract: The invention is related to an impeller for a single vane type of centrifugal pump. In order to diminish the risk of clogging of the pump when pumping a fluid having a large impurity content, a vane having varying thickness is provided. In this manner, the speed reduced in the channel is limited resulting in a favorable flow pattern. Additionally, the vane may be made hollow in order to reduce unbalance problems.

Abstract: A single-stage or multi-stage centrifugal blower for hot fluids has a rotor whose housing is made of steel or carbon filaments and whose vanes are made of a ceramic material. The internal surface of the housing is shielded from hot fluids by a lining which is made of a heat-resistant and heat-insulating material and which shares the angular movements of the rotor. The housing can stand pronounced tensional and bending stresses, and the vanes and the lining are designed to stand the pressure of the conveyed and/or compressed fluid or fluids. The blower can be used as a turbine, a suction fan or a pump and can convey gases whose temperature is in excess of 1600.degree. C. and whose pressure is in the range or in excess of 2000 mm water column.

Abstract: A pump impeller to be used when pumping liquid containing solid bodies. The impeller is provided with one single vane designed with a hollow for balancing the impeller. The hollow is connected to the surroundings via a slot at a point where the vane has its maximum diameter. The impeller is then perfectly balanced when rotating in liquid as well as in air.

Abstract: A centrifugal throwing blast wheel is made of two discs which are spaced from each to form a V-shaped outwardly widening slot forming an angle .alpha.. Sets of diametrically opposed ejection vanes are between the discs. One set has straight throwing faces. Another set has concave faces with a curvature axis inclined toward the plane of rotation at an acute angle greater than .alpha./2. A third set has curved faces inclined toward the other side of the plane of rotation.

Abstract: A helicopter tail rotor (14) is provided with a thrust ring. The thrust ring comprises an annular airfoil (16) having a circular opening which is aligned coaxially with the rotor (14). The plane of the airfoil (16) is essentially parallel to the plane of the rotor (14) but slightly offset downstream from the rotor (14). The cross section of the airfoil (16) can have a wide variety of configurations including flat and cambered. The tip vortices (30) produced by the rotor (14) are captured near the downstream surface of the airfoil (16) to produce a circulating airflow (32) that draws air from the upstream region of the airfoil (16) through the opening therein. The aerodynamic action of the airfoil (16) widens the wake diameter of the wash from rotor (14), increases rotor (14) thrust efficiency, reduces the noise level of rotor (14), enhances transverse stability and lowers the vibration level experienced by helicopter (10). The airfoil (16) further serves as a guard to protect the rotor (14).

Abstract: An impeller for a centrifugal oil pump having improved head and flow output capabilities, which impeller can be machined into the end of a crankshaft. A plurality of radially extending tunnels are disposed horizontally in the crankshaft, with outlets in the perimeter of the crankshaft. An annular groove is provided in the crankshaft, with a groove opening in the bottom surface of the crankshaft and a subtending groove surface defining the depth of the groove. The subtending groove surface is normally narrower than the groove opening, and the groove intersects the tunnels, exposing a part of the tunnel walls to a flow of fluid from directly below. The exposed tunnels act as vanes to scoop oil from the groove and accelerate it to crankshaft speed. Entrained gases collect near the subtending groove surface, and a vent passage is provided to conduct the gases out of the impeller.

Abstract: This invention is directed mainly to a propelling apparatus and a control for said propelling apparatus for use with a boat. This invention can be used with a small boat for pleasure and also for fishing. The propelling apparatus comprises a pump in the form of a propeller and a motor for driving the impeller. Also, there is a novel heat exchanger arrangement and a novel mounting device for support of the motor in a driving relationship with the propeller. Further, there is a novel heat exchanger and muffler combination for the exhaust gases from the motor.

Abstract: The present invention relates to a pump impeller for moving a fluid, comprising a hub on which at least one blade is fixed, wherein a support connects each blade to the hub and extends radially, winding helically with respect to the axis of said hub, while each blade extends in a direction substantially perpendicular to the radial direction of each support. One application of the present invention is the production of a pump impeller with high speed of rotation and high yield.

Abstract: The disclosure relates to a rotary machine, the basic elements of which are generically adapted for use as a two-stage pneumatic compressor or as a four-cycle combustion engine or as a two-cycle combustion engine. The basic combination of elements of the machine comprises a plurality of rotors rotatably mounted on axes disposed at substantially right angles to each other and wherein the rotors are provided with peripheral portions having inwardly notched or recessed chamber portions which are disposed between alternate radially extending lobe portions.

Abstract: A device for stirring a liquid having two cup-shaped elements coaxially mounted on the end of a shaft. Radial vanes extend between the two elements to define liquid flow passages, the liquid entering from a hole at the apex of the outer cup. The outlet end of each of the vanes is bent at approximately a right angle to the rest of the vane.