Abstract: The invention concerns a structure for mounting a fan to a fan motor. The structure is designed to fit a plurality of thrust washers onto the end of a motor shaft supported in a casing through a bearing and to thrust and fit a flat washer on a peripheral surface of a smaller diameter step formed on the tip side further than the washers-fitted section. Of these thrust washers, the most outer, tip side, thrust washer located opposite to the flat washer is thicker than the traveling play distance toward the core of a motor shaft and thinner than the interval from the adjacent thrust washer to the peripheral surface of the step. With the construction, hence, the invention serves to prevent the thrust washer from falling onto the smaller diameter step.

Abstract: A vacuum pump of the type having a Gaede channel, the pump comprising a stator (1) and a rotor (2) driven to rotate inside the stator, the stator including a suction inlet (12) and a delivery outlet (13). The active portion of the rotor situated between the suction inlet and the delivery outlet is hemispherical in shape (9) and is disposed inside a cavity (10) of the stator which is likewise hemispherical in shape. The axis .delta. of said rotor coincides with the said axis of the hemispherical cavity of the stator. Suction takes place at the large circle end of the hemispherical rotor via radial clearance j.sub.a between the rotor and the stator, and delivery takes place at the pole end of the hemispherical rotor. An adjustment distance piece (14) for axially positioning the rotor (2) relative to the stator (1) is provided so that the radial delivery clearance j.sub.r is smaller than the radial suction clearance j.sub.a.

Abstract: A variable capacity centrifugal pump capable of directly varying capacity, r output, in response to existing back pressure. The pump comprises a axially movable shroud having female grooves in fluid tight communication with male impeller vanes. The shroud has a top face surface in fluid communication with a control cavity which in turn is in fluid communication with pump back pressure.

Abstract: A variable-capacity water pump includes a pump impelled fixed to a rotatable shaft for forcibly feeding cooling water from a cooling water passage, a mechanical seal disposed behind the pump impeller, a temperature sensor such as a thermostat mounted on the rotatable shaft and disposed in the cooling water passage for detecting the temperature of the cooling water, a thrust shaft disposed coaxially with the rotatable shaft and axially movable by the temperature sensor, and a disk secured to the thrust shaft for axial movement therewith, the disk being axially movable by the temperature sensor for varying a range of operation of the pump impeller. In response to a variation in the temperature of the cooling water, the temperature sensor axially moves the thrust shaft and hence the disk to vary the range of operation of the impeller, thereby changing the quantity of the cooling water flowing through the water pump.

Abstract: The disclosed pump includes a casing housing a working chamber and an impeller. The impeller includes a blade wheel mounted on a rotational shaft, a plurality of pumping blades extending axially from the periphery of the blade wheel and a cover mounted within the casing and fitted over the blade wheel for rotation therewith. The cover includes an end face member defining one side of the working chamber and a cylindrical skirt portion depending from the periphery of the end face member and encircling the blade wheel and defining a hollow interior space within the impeller between the end face member and the blade wheel. The end face member has a plurality of slots through which the blades extend into the working chamber. The interior surface of the cover defines a plurality of pockets, each contoured to receive and mate with one of the blades so that in use each blade rests flush against one surface of the pocket with no space for fluid therebetween.

Abstract: A water pump having a pump impeller and a cup-like disk disposed to be movable along a rotation shaft driven by the engine, a space for passing water being formed between the pump impeller and the cup-like disk, the pump impeller and the cup-like disk being engaged each other by the engagement of vanes and grooves formed at least one side of them respectively, the distance between the pump impeller and the cup-like disk being varied according to the change of water temperature or the change of rotation speed of the engine, thereby to make it possible to adjust the water flow rate of the pump.

Abstract: The invention concerns a method and an apparatus for the mixing of liquid or gas into pulp stock. In the method the pulp is fed into a centrifugal pump, into which, at the same time, the material to be mixed is fed into the zone between the center and the outer circumference of the rotor wheel. The apparatus is preferably provided with rotor blades consisting of two parts and with feed pins extending into the gap between the said parts.

Abstract: A moveable, ovoid body for incorporation in and with the conventional elements of a turbo jet and possessing compressor and diffuser shape characteristics that are found in turbo jet machines. The invention is designed to take the place of conventional diffusers which are employed in both compressor and turbine stages of turbojets. When used with the hydrovapor engine, developed by the inventor, the moveable diffuser shell which operates in conjunction with impeller and turbine propeller blades offers a wide range of selectable operational parameters such as inlet flow velocity, compression chamber pressure and exhaust velocity.

Abstract: A magnetic-drive centrifugal pump comprises a driving motor, a pump shaft, an impeller, a rotor with a sleeve portion to which is connected the impeller, the rotor and impeller being rotatably mounted on the pump shaft, and a pump casing consisting of a front casing and a rear casing. The impeller is driven by a magnetic coupling formed by a driving magnet provided on a magnet holder connected to the driving motor and an impeller magnet provided in the rotor. The sleeve portion has an outer diameter smaller than an outer diameter of a main portion of the rotor. The rear casing has at a location opposite to the sleeve portion a first inner diameter enabling an outer circumference of the main portion of the rotor to slide therein, and at a location opposite to the main portion of the rotor a second inner diameter larger than the first inner diameter.

Abstract: A mechanical seal mounting assembly for a centrifugal high solids concentration slurry pump is disclosed. A rotating seal ring adapter is secured to the pump's impeller drive shaft for rotation with the shaft. A stationary seal ring adapter is secured to a first end of a seal carrier which extends through the pump's back plate. A split gland ring is attached to a second end of the seal carrier and is supported by gland nuts threadedly carried on gland bolts. The gland bolts are attached to a bearing assembly for the pump shaft. Axial movement of the pump shaft to effect impeller clearance seal adjustment is possible without disturbing the mechanical seal adjustment. An O-ring is interposed between the pump back plate and the seal carrier and is held in place by an O-ring retainer secured to the back plate of the pump.

Abstract: A pump, for example, a centrifugal slurry pump, has a casing (10) with an inlet (12) and an outlet (14). The casing (10) and a separate backliner (28) define a chamber (16) in which an impeller (18) is arranged to be rotated by way of a drive shaft (20) which extends axially with respect to the casing (10). Fine running clearances are defined between the front and rear surfaces of the impeller (18) and the adjacent surfaces of the casing (10) and the backliner (28). In order to compensate for increases of the running clearances, for example, due to erosion, the backliner (28) may be moved axially relative to the casing (10). The backliner (28) is connected to an annular flange (38) which is bolted to an annular flange (36) connected to the casing (10) and the spacing between the flanges (36, 38) may be adjusted by removing one or more shims (40) provided therebetween.

Abstract: A centrifugal pump having an adjustable feature enabling precise adjustment of the impeller's location.

Abstract: A supercharger apparatus for an internal combustion engine. A compressor impeller is arranged in a compressor housing so that a clearance is formed therebetween. The housing is slidably connected to a housing for supporting a shaft on which the compressor impeller is connected, so that the compressor housing is moved between a first position where the clearance is minimum and a second position where the clearance is maximum. A fluid chamber is provided for receiving a fluid flow to generate pressure for moving the compressor housing between the first position and the second position in accordance with the operating condition of the engine to vary the clearance.

Abstract: A variable breadth centrifugal pump arrangement includes two intermeshing peller sections that are mounted to a common pump shaft so that one of the impeller sections is axially moveable relative to the other impeller section. The impeller sections are rotationally interconnected by a torque transmitting member in the form of a bellows element, which may comprise an axially resilient metal tube formed with a plurality of pleats or a plurality of radially spaced pleated metal tubes that are separated by elastomeric material. Another form of torque transmitting bellows element comprises a plurality of dish-shaped element connected together at their central and peripheral edge portions.

Abstract: A pump or blower device particularly for heating and air conditioning systems is provided with a plurality of inlet ports and a plurality of outlet ports. Axially displaceable impeller means are moved to connect any one inlet port selectively with a first outlet port or with a second different outlet port or with a plurality of outlet ports simultaneously. The device is of great advantage in controlling the circulation of heating or cooling fluids between a primary circuit and secondary circuits that branch out to provided heating or cooling in selected separate areas of a building or to a plurality of buildings serviced by the primary circuit. The present device decreases the number of pumps and mixing valves in the systems and results in decreasing installation and operating costs.

Abstract: A vortex pump which has been converted from a centrifugal pump by interposing an annular spacer between the power frame and casing of the centrifugal pump to provide space for a vortex impeller which has been substituted for the centrifugal impeller. An adjustable vortex impeller consisting of a hub portion with an annular flange having a plurality of sets of holes circumferentially spaced thereon, a plurality of vanes each having a plurality of holes in its root portion, and bolts for fastening each of the vanes in a plurality of different positions on the hub by passing through different pairs of aligned holes in the flange and in the roots to provide different impeller diameters while maintaining the discharge angle of the vanes within a small predetermined range. A plurality of sets of vanes of different sizes can be selectively mounted on the hub to further extend the range of impeller diameters.

Abstract: This device is aimed at solving the problem of varying sealing gaps between a rotatable turbine disc and fixed structure. Axial movement of the turbine disc relative to the fixed casing causes a ring coaxially carried in air bearings on the turbine disc for relative rotation and movement therewith, to operate at least one lever which in turn rotates a shaft. Rotation of the shaft operates further levers to cause seal rings operatively supported thereby, to precisely follow the axial movement of the turbine disc.

Abstract: An energy transfer machine including a stator ring carried in a casing forming a toroidal fluid path between a fluid inlet and a fluid outlet. A rotor has a blade cascade coacting with fluid in the path to transfer energy therebetween. Apparatus and methods are disclosed for controllably unloading the energy exchange between the rotor and the fluid.

Abstract: A high pressure centrifugal pump has an impeller assembly including two mating impeller sections which are each constituted by a shroud with fixed geometry blades. The impeller sections are fixedly mounted upon a rotatable shaft and are of a construction which permits the pressure between the impeller sections to engender flexure of the sections away from each other so as to vary the breadth of the impeller assembly. A servo control device is adapted to control the pressure behind the shrouds such that the pump delivers a constant flow at varying back pressures.

Abstract: A gas turbine having a rotor and a stator, the stator defining a blade channel which is of generally conical configuration and being axially movable relative to the rotor. A thermal responsive means which is heated in accordance with the temperature of the gas in the turbine moves the stator and rotor axially relative to each other to vary the gap therebetween so as to maintain the clearance between the rotor blades and the stator housing within predetermined values. The gap is subject also to the rotational forces acting on the rotor blades.

Abstract: A high-capacity pumping apparatus for handling thermoplastic materials such as hot melt adhesives is provided which is capable of safely and efficiently pumping materials heretofore thought to be impractical because of the high flow and melting points thereof. The apparatus preferably includes a heated pressure plate, an elongated, tapered, material-conveying barrel connected thereto, a complementally tapered, axially shiftable auger with the barrel, and pressure-responsive means coupled to the auger for automatically shifting the auger relative to the barrel in order to temporarily decrease pumping efficiency during momentary slowdowns in material flow so that dangerous pressure buildups within the apparatus are avoided, and for returning the auger to its normal pumping position when adequate material flow resumes.

Abstract: The present invention relates to a centrifugal pump assembly in which an impeller is mounted to a motor shaft without the need for precision machining of the shaft and in which the proper spacing is automatically achieved between the impeller and the pump housing. An end of the motor shaft projects toward an impeller chamber in which a rotary impeller is situated. The impeller hub has a bore therein through which a threaded fastening means passes. The threaded fastening means mates with a threaded well in the end of a motor shaft. However, a coil spring which surrounds the fastening means abuts the shaft end and also abuts the impeller hub. The spring biases the impeller away from the wall of the pump housing and toward the interior of the impeller chamber. The spring prevents the impeller from abutting against the housing wall and the bias of the spring may be adjusted to compensate for variations in the shaft length.

Abstract: This case relates to a variable performance pump wherein the width of the impeller in a centrifugal pump can be regulated while the unit is operating. The impeller's width is regulated by the pump pressure and is controlled by a small external valve. The pump performance may be varied over a wide range to obtain constant head, constant capacity or other desired pumping characteristics.

Abstract: A centrifugal pump, particularly for liquid fertilizer, whose casing has a central cavity housing an impeller in cantilever attachment to the end portion of a drive shaft. This drive shaft end portion forms a socket engaging the free end of the main drive shaft and is fixed thereto by retractable means.

Abstract: Ventilator apparatus which includes rotary impeller or fan structure and an electric motor for rotation thereof. A shaft joins the rotor of the electric motor to the impeller or fan structure for rotation thereof. The rotor of the electric motor, in addition to being rotatable, is axially movable upon energization thereof. A shroud encompasses the impeller or fan structure. A closure member attached to the shaft is adapted to be closely positioned with respect to the end of the shroud to substantially close the shroud when the apparatus is not in ventilating operation. When the rotor of the electric motor is energized for operation of the impeller, the rotor, in addition to commencing rotation, moves axially and moves the closure member axially to spaced relationship from the shroud, to provide an opening between the shroud and the closure member for flow of air between the shroud and the closure member.

Abstract: An outboard marine propulsion apparatus has a rotor unit axially displaceable between forward and reverse operating positions. In the forward position, concentric horizontal paths through the apparatus are provided for rearward discharge of the propulsive water stream and the engine exhaust gases; in the reverse position, paths are provided for discharging the propulsive water stream forwardly and the exhaust gases in radially outward directions ahead of the rotor unit. For reverse operation one of the concentric flow paths is closed by an automatically actuated butterfly valve responsive to the axial displacement of the rotor unit. A dashpot device controls the axial sliding speed of the rotor unit.

Abstract: A feeding screw for a slide casting machine. The feeding screw comprises a non-rotary, tubular inner part, a screw part, a vibrator arranged at the outer end of the inner part, and power transmission means for the vibrator. The mutual position of the inner part and the screw part can be changed by means of a tightening nut. Thereby the resiliency of an annular resilient means arranged in an annular space between the inner part and the screw part changes such that a desired distribution of vibration energy between an extended vibration portion of the screw and the screw itself is obtainable.

Abstract: A vacuum turbine for a drill has a housing of tubular configuration about an axis and has a sleeve disposed within the housing and also of tubular configuration about the axis. The sleeve is spaced from the housing to provide an annular air passage between them. A pair of bearings within the sleeve supports a turbine shaft rotatable about the axis. At one end of the shaft is a turbine runner including blades extending across the air passage and also including a shroud at the periphery of the blades and having a rim face normal to the axis and in very close axial relationship to an end face on the housing to reduce the travel of air therebetween.