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 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.

Abstract: An apparatus is provided that is useful for effecting liquid-liquid extraction by contacting a first liquid medium with a substantially immiscible heavier second liquid medium. The apparatus includes either a single mixer-settler unit or two or more such mixer-settler units in series. Each mixer-settler unit includes a vertically extending settling tank. An elongated extraction column extends generally vertically upwardly through the settling tank bottom. The extraction column is open at its top with the top of the extraction column below the top of the settling tank. A mixer is provided in liquid communication with the extraction column for mixing the first and second liquid mediums together to form a dispersion of droplets of one of the liquid mediums in the other liquid medium and for pumping the liquid mediums through the apparatus. The dispersion flows from the mixer upwardly through the extraction column and out from its top into the settling tank.

Abstract: A centrifugal pump for liquids containing solid material, the impeller of which has two or several vanes. In a bottom projection the leading edge (3) of the impeller (1) vane (2) is curved backwards in relation to the rotating direction of the impeller. The angle between the leading edge (3) and the outer edge (5) is obtuse in a meridian and a bottom projection. The outer end (10) of the leading edge of the vane is positioned behind a shoulder (9) provided with grooves (11), which cooperates with the vanes of the impeller. The form of the leading edge causes the fibres and the sticks to be conveyed towards the point of the vane where they are crushed by the combined effect of the groove and the vanes.

Abstract: A vortex pump is provided wherein an impeller is of an open type and plural blades are grouped into two or more groups, the axial width of each group of blades being different from the others so that the blades belonging to a certain group extend into a vortex chamber so as to directly drive the liquid in the vortex chamber while relatively large pieces of foreign matter are permitted to pass through the pump.

Abstract: A hydraulic turbine is of the kind having a distributor including a passage, without blades therein, which communicates with the movable blades of a rotor, having four blades, by means of injectors constituted by gaps formed between adjacent portions of a circular ring, the number of which is double that of the blades. The water escape axially to the center of the rotor chamber. The improvement of the present invention is that, in combination, the blades have a profile of an arc of a circle, and the portions of the stator ring which define the injector gaps each have a plane terminal face inclined at substantially 45.degree. to the corresponding radius of the respective portion of the ring and, for a first injector, forming an angle of substantially 135.degree. with a plane tangential to the external surface of the corresponding blade, when that blade occupies a position in which an adjacent blade is about to cooperate with the respective injector.

Abstract: A radial fan has airfoil-like, backwardly curved blades placed between a support plate and a cover plate. The blades are so formed that the blade entry angle on the cover plate side is 4.degree. to 7.degree. smaller than the blade entry angle on the support plate side and the blade exit angle on the cover plate side is 3.degree. to 6.degree. smaller than the blade exit angle on the support plate side. The blade entry angle on the cover plate side is between 14.degree. and 20.degree. and the blade exit angle on the cover plate side is between 39.degree. and 45.degree.. This form is produced by twist of the blades or twist-free deformation thereof.

Abstract: A fluid motor consisting essentially of a housing mounted on a water pipe and containing a vaned disc which functions as a paddle wheel whereby fluid moving through the conduit engages the vanes driving the disc and an output shaft associated therewith which in turn is utilized to drive a generator and produce an electric current.

Abstract: A curved blade rotor for a radial inflow turbo supercharger which is made of ceramic material and having a plurality of curved blades each with a curved outer edge. The surface roughness of the curved outer edge is 0.8S to 2S wherein "S" indicates surface roughness according to Japanese Industrial Standard B 0601.

Abstract: A hybrid dual property radial turbine rotor for a gas turbine engine includes an airfoil shell having a plurality of radially outwardly directed airfoils thereon joined to a continuously circumferentially formed inner periphery including a constant diameter axially extending portion and a radially outwardly flared skirt portion thereon into which is fitted a preformed hub plug of dense stress resistant material having an axially extending nose portion thereon with a controlled constant circumference surface throughout its length of a precision dimensioned diameter and further including a conical end thereon with a surface thereon of a slope that is congruent with the slope of the flared skirt portion of the cast metal rotor shell and wherein the slope of the flared skirt portion is configured to optimize the location of the high strength hub material and to achieve optimum blade and hub stress levels.

Abstract: Several forms of surface impeller for aeration of liquids are disclosed. All of the forms are of the shrouded or closed turbine type. In one form, the impeller has a large-diameter flat steel horizontal upper disc adapted to be secured to the lower end of a vertically disposed rotatable drive shaft. Secured, as by welding, to the undersurface of the upper disc are a plurality, such as six or eight or other number, of vertical blades at uniform spacing. Each blade is curved in a retreating or backward direction relative to the direction of rotation of the impeller. Each blade has a long or deep vertical inner edge located forward of the center axis of rotation. The lower edge of each blade is inclined upwardly toward a relatively short or shallow vertical outer edge located near the outer periphery of the upper disc. The horizontal innermost portion of the otherwise inclined bottom edge of each blade is welded to a small lower tie plate.

Abstract: A radial injector having a rotational disk through which gases are aspirated from the atmosphere and mixed with a fluid contacting the disk at the other side thereof. The disk is defining a ring slot by cooperating with a flange portion of the housing. Upon rotation of the disk, the fluid is accelerated towards the periphery of the disk thereby developing an undertow in the ring slot. Consequently gases are aspirated and injected into the fluid.

Abstract: To prevent the generation of noise from axial oscillations of the fan wheel on electric machinery, especially motors and generators in motor vehicles, the fan wheel is composed of a support assembly consisting of a plurality of adjacent metal discs or rings, surrounded by a preferably molded plastic fan circle in which the fan blades are embedded. The component discs of the support assembly may be of different thickness to provide different natural resonant frequencies, thereby further suppressing axial oscillations.

Abstract: Disclosed is a centrifugal-blower impeller, which consists of a center part and radially outer part, which has a smaller thickness of material than the center part. The outer part consists of ring segments attached by welding to the periphery of the center part. The ring segments are first welded to the center part and thereafter radially to each other so that the ring segments are subject to tensile stress and the center part to compressive stress.

Abstract: Several forms of surface impeller for aeration of liquids are disclosed. All of the forms are of the shrouded or closed turbine type. In one form, the impeller has a large-diameter flat steel horizontal upper disc adapted to be secured to the lower end of a vertically disposed rotatable drive shaft. Secured, as by welding, to the undersurface of the upper disc are a plurality, such as six or eight or other number, of vertical blades at uniform spacing. Each blade is curved in a retreating or backward direction relative to the direction of rotation of the impeller. Each blade has a long or deep vertical inner edge located forward of the center axis of rotation. The lower edge of each blade is inclined upwardly toward a relatively short or shallow vertical outer edge located near the outer periphery of the upper disc. The horizontal innermost portion of the otherwise inclined bottom edge of each blade is welded to a small lower tie plate.

Abstract: A radial or semiaxial impeller for centrifugal pumps has an annulus of vanes whose inlet edges are disposed at the periphery of a circle and are bounded by convex transition surfaces having small radii of curvature. The inner portions of the suction sides of vanes are bounded by flat or slightly curved surfaces which merge gradually into concave surfaces bounding the outer portions of the respective suction sides. The length of each flat or slightly curved surface is between 3 millimeters and the vane pitch. The ratio of the radii of curvature of transition surfaces at the inlet edges of the vanes to the vane pitch is between 0.0035 and 0.04 and/or the ratio of these radii to the average thickness of the inlet portion of a conventional vane is between 0.04 and 0.50. Such construction of the vanes reduces the likelihood of excessive erosion as a result of cavitation.

Abstract: In an impeller element of a radial inflow gas turbine the shape of the blades and the outer profile of the hub are such as to make the impeller symmetric about two planes, one through the axis of rotation and one normal to it, the impeller thus deviating from the conventional shape of radial inflow gas turbine impellers, which to a considerable degree has been adapted to the theoretical path of the gas.

Abstract: Each blade on an impeller disc comprises an impeller portion extending substantially radially of the disc and a centrally located inducer portion on the front side of the impeller portion, the inducer portion being angled from the impeller portion in the direction of impeller rotation. The impeller portion itself is mostly inclined in the direction of impeller rotation, with the angle between the impeller portion and the front face of the disc being about 90 degrees at its inner end and gradually decreasing toward its outer end, where the angle is in the range of from about 50 to 70 degrees. Preferably, these blades are arranged alternately with auxiliary blades which are essentially identical with the impeller portions of the first recited blades.

Abstract: Several forms of surface impeller for aeration of liquids are disclosed. All of the forms are of the shrouded or closed turbine type. In one form, the impeller has a large-diameter flat steel horizontal upper disc adapted to be secured to the lower end of a vertically disposed rotatable drive shaft. Secured, as by welding, to the undersurface of the upper disc are a plurality, such as six or eight or other number, of vertical blades at uniform spacing. Each blade is curved in a retreating or backward direction relative to the direction of rotation of the impeller. Each blade has a long or deep vertical inner edge located forward of the center axis of rotation. The lower edge of each blade is inclined upwardly toward a relatively short or shallow vertical outer edge located near the outer periphery of the upper disc. The horizontal innermost portion of the otherwise inclined bottom edge of each blade is welded to a small lower tie plate.

Abstract: A rotary electric machine comprising a housing containing therein several parts which are to be heated during operation of the machine, and a centrifugal cooling fan for producing an air circulation through the housing so as to cool the heated parts. The cooling fan is made of a disc-shaped metal plate having on its periphery a plurality of fan blades each formed by bending a radially outer portion of the metal plate upstandingly with respect to the surface thereof, and a plurality of notches each defined between the adjacent fan blades. A backing disc-plate is disposed at the back side of the cooling fan in a manner to block therewith the notches, thereby preventing an air from passing through the notches in an opposite direction from an ordinary air flow passing through the housing. The disc-plate and the cooling fan are disposed to define a small clearance therebetween for preventing rattling noises from being produced during rotation of the cooling fan due to an occasional vibratory contact therebetween.

Abstract: An impeller blank for a centrifugal compressor has impeller blades with inducer sections of parabolic contour extending in a generally axial direction from generally radial sections of the blades. The angle of the working surface of each inducer section with respect to a plane at right angles to the impeller axis varies inversely with diameter and with the axial dimension of the inducer section from the radial section. The inducer sections are cut to a diameter for minimum gas velocity with respect to the impeller, a function of gas flow rate and impeller speed, and are cut axially for an inlet angle which is a function of the ratio of axial to peripheral gas velocity to achieve flow nearly parallel with the working surface of the inducer section.

Abstract: A centrifugal impeller of the so-called single-disc wheel type wherein the projector blades are mounted by dovetail joints to the impeller wheel and locked in position by releasable entirely encapsulated leaf springs inserted into recesses between the impeller wheel and an associated projector blade.

Abstract: The invention comprises a water wheel having spaced parallel circular side walls supported on bearings which are rotationally mounted in a stationary base, these bearings preferably being the wheels of railroad cars, there being a plurality of generally radially extended paddle elements disposed between the side walls and extending from the periphery thereof, and including an upwardly extended chute connected to an elevated water supply, this chute having a lower end shaped to deflect water generally horizontally and tangentially into the upper portion of the water wheel and against the paddle elements.

Abstract: A radial-flow turbomachine (centrifugal compressor or centripetal turbine) is provided with a lip extending along the free edge of each rotor blade from the inlet to the outlet end of the blade. The lip extends from the pressure face of the blade and serves to minimize leakage between the edge of the blade and the adjacent fixed shroud past which it is rotated.

Abstract: Sheet metal rotor wheel for radial-flow fans, turbines, and the like, and method and fixture for manufacturing same by use of explosion welding of a rotor dish to angled legs of the individual rotor blades. The individual rotor blades are formed of a T-shaped cross-section by joining two L-shaped cross-sections together by spot welding, brazing, or the like. The blades are then positioned in a fixture in predetermined relative positions corresponding to their final positions on an assembled rotor wheel. The fixture includes a rigid outer ring having an inner radius corresponding to the outer radius of the rotor wheel. The fixture also includes spacer members having gaps therebetween for holding the blades in position within the ring. The spacer members have an outer configuration corresponding to the configuration of a rotor dish, which rotor dish is held at a spacing from the angled legs of the blades, the rotor dish being covered with a layer of explosive material.