Abstract: A blower housing is formed by two housing members each of which has a motor chamber portion located between two blower chamber portions. The open sides of the two housing members are fitted together to form a motor chamber and two blower chambers for receiving a motor and two blowers coupled to shafts of the motor extending from opposite ends thereof. The structure forming the motor chamber portion of each of the two housing members has at least one arcuate slot formed between two arcuate edges for removably receiving at least one gasket such that arcuate edges and gaskets are provided for holding the housing of the motor. The two housing members may be formed with motor chambers portions with arcuate slots and arcuate edges of different sizes to receive and hold motor housings of different sizes.

Abstract: A positive displacement pump comprises a mass such as a liquid filled pressure chamber or an annular ring which is rotated at high speed about a first axis so that centrifugal force acting on the liquid or ring creates zones of differential pressure within the interior of the pressure chamber or along the wall of the ring. At least one pumping unit having a pressure-responsive member is oscillated or rotated between the zones of differential pressure while the center of gravity of the pressure chamber or ring is maintained at a fixed distance from the first axis. In the course of moving into one zone having one pressure, the pressure-responsive member of the pumping unit is effective to intake a fluid such as air into the pumping unit. Air is discharged from the pumping unit by the pressure-responsive member in the course of moving from such one zone into another zone having a different pressure.

Abstract: A self-regulating peristaltic pump having a pumping chamber of enhanced operating life. The operating life of the tubing is improved by a combination of features including providing the tubing with a naturally collapsed passageway. The tubing is collapsed when the internal pressure of the tubing is equal to or less than ambient. In this state, the pump is unable to generate negative pressures. Upon fluid being supplied to the tubing at a pressure greater than ambient, the tubing inflates and cooperates with rollers of the pump to transmit the fluid. The pump also includes a novel means for adjusting and regulating the tension of the tubing further enhancing the operating life of the tubing.

Abstract: A double diaphragm pump having diaphragms connected by a coupling rod and separating two diaphragm chambers, a control spool displaceable in dependence on the position of the diaphragms, with closure means for alternate freeing and closing control passages arranged in a control spool housing for alternate pressurizing and relieving of a driving medium chamber with driving medium, and an actuating member coupled with the diaphragm movement and magnetically with the control spool.

Abstract: An electromagnetic reciprocating pump comprising of a closed-type casing provided with a cylinder in front thereof, a main shaft as least the front end of which is fixed to the casing, a piston having a piston head in front thereof, which piston is slidably fitted over the outer periphery of the main shaft to reciprocate, and coaxially supporting an armature, a spring disposed between the piston and the casing for biasing the piston in one direction, an electromagnet fixed to the casing so as to attract the armature in the opposite direction against the biasing force of the spring, suction ports and suction valves for sucking a fluid into a pressure chamber defined by the cylinder and the piston head, and a discharge port and a discharge valve for discharging the pressurized fluid from the pressure chamber.

Abstract: An apparatus for transferring electrically conductive coating materials such as water-based paint from a source to an electrostatically charged dispenser includes first and second shuttle devices and two large reservoir, piston pumps each having structure for preventing contamination of the coating material and pressure build-up at their piston heads. The first shuttle device is movable between a neutral position wherein it is electrically isolated from a filling station connected to the coating material source, and a transfer position wherein coating material is transmitted to one of the piston pumps through a coupling device which connects the filling station and first shuttle.

Abstract: A volumetric pump and method for displacing a predetermined quantity of fluid at a predefined cracking pressure, independent of supply and output pressures. The volumetric pump (30) includes an inlet cracking valve (46), an outlet cracking valve (52), and a plunger (48) for displacing fluid a pumping from a pumping portion (34b) of flexible tubing (34) that extends through the volumetric pump. The pumping portion of the flexible tube fills with liquid when the inlet cracking valve is fully opened and is urged to expand by jaws (236) on pivotally-mounted arms (234). The arms are forced to pivot, as tubing reshaper rollers (160), disposed on the plunger, roll along the inner surface (232) of each arm.

Abstract: A linear peristaltic pump for pumping fluid through a resilient tube has a pair of pumping fingers, a pair of pinching fingers, and a strain gauge to monitor pressure inside the tube. The first pumping finger squeezes the tube at a first location, and the second pumping finger squeezes the tube at a second location. Additionally, the first pumping finger is configured and operated to displace approximately twice the fluid volume displaced by the second pumping finger. The first pinching finger occludes the tube upstream to the first pumping finger and the second pinching finger occludes the tube between the first and second pumping fingers. To monitor dimensional changes in the outer diameter of the tube and thereby indicate pressure inside the tube, the strain gauge is mounted on the pump between the second pinching finger and first pumping fingers. Finally, a leaf spring and photoelectric sensor are associated with the first pumping finger to indicate when the finger is in its fully withdrawn position.

Abstract: Variable turbocharger apparatus (2) comprising a housing (4), a compressor (6) mounted for rotation in the housing (4), a turbine (12) mounted for rotation in the housing (4), a first inlet (16) for enabling air to be conducted to the compressor (6), an outlet (18) for air from the compressor (6), a second inlet (20) for enabling exhaust gases from an engine to be conducted to the turbine (12), a chamber (22) which surrounds the turbine (12) and which receives the exhaust gases from the second inlet (20) before the exhaust gases are conducted to the turbine (12), and a piston (24) which is positioned between the turbine (12) and the housing (4) and which is slidable backwards and forwards to form a movable wall separating the turbine (12) from the chamber (22) which surrounds the turbine (12), the piston (24) having a plurality of vanes (102), the piston (24 ) being such that in its closed position it terminates short of an adjacent part of the housing (4) so that there is always a gap between the end (30) of

Abstract: The invention is a pumping system composed of a relatively thin wall extruded tubing that in different forms can provide flow regulation for peristaltic pumps, reduce spallation, extend pumping life, provide means to measure inlet and outlet pressure of the peristaltic pump and limits the inlet and outlet pressure generated by peristaltic pumps, and a special peristaltic pump that takes advantage of the characteristics of the aforementioned tubing. The invention has particular usefulness in the medical industry for pumping physiological or nutritional liquids.

Abstract: The system components include a peristaltic infusion pump device keyed for cooperation with a mutually keyed receiver which in turn is additionally keyed for receipt of a mutually keyed tube set having a selected fluid flow capacity for delivery of medical fluids at a selected fluid flow rate in a selected direction to or from a patient.

Abstract: A fluid pump, particularly an extracorporeal blood pump, comprises a pump chamber (1) having an inlet opening (2) and an outlet opening (3), each connected to a respective non-return valve (4,5). The inlet (1) and the outlet (2) are movable in relation to each other and connected to a drive means (6) for periodic displacement of the inlet and the outlet alternately towards and away from each other, the interior volume of the pump chamber (1) being variable in correspondence with the relative distance between the inlet and the outlet. The pump chamber (1) is on its outside influenced by the surrounding pressure and has a wall of a flexible material constructed in such a manner that the pump chamber will collapse and reduce its volume, if the interior pressure in the pump falls below the surrounding pressure by an amount greater than the required opening pressure difference for the nomn-return valve connected to the inlet.

Abstract: A hermetic refrigeration compressor of the single reciprocating piston type as a valve plate extending over the open end of the cylinder and a first cylinder head secured to the valve plate and enclosing a discharge planum. The first cylinder head includes a recessed portion adjacent a suction port and has a bridge portion extending across the recess above the valve plate. The suction side includes an integral suction muffler and second cylinder head which fits within the recess to include a planum overlying the suction port and a U-shaped spring clip engages the bridge with one leg between the bridge and the second cylinder head to hold it in place while the clip includes a second leg which extends over the top of the bridge and hooks on the side to hold the second cylinder head and the spring clip in place.

Abstract: An improved control mechanism for submerged reciprocating hydraulic pumps comprising, in combination with pump cylinders, pistons and valves, a two-stage flow reversing mechanism in which action of the pump pistons drives a valve pilot means between two rest positions; relocation of the pilot means in turn causes relocation of a spatially separated spool mechanism between two rest positions, thereby causing reversal of flow of fluid while the pump is driven by a one-way pressurizing pump. The two-stage reversing mechanism eliminates the possibility of having the reciprocating mechanism come to rest in a "dead center" or equilibrium position. The spool is mounted concentrically with the pump shaft, optimizing flow potential. The mechanism is relatively easy to assemble and repair.

Abstract: A method and apparatus for producing compressed air includes sealing air in a container capable of reducing its volume by external hydraulic pressure. A weight having a larger specific gravity than water is attached to the container to sink the container deep under water. Compressed air is produced when the volume of the container is reduced by hydraulic pressure, and is transferred into a recovery vessel connected to the container via a check valve. The weight is then separated from the container to cause the container to float on the water by the action of buoyancy. The compressed air can then be recovered from the recovery vessel.

Abstract: An apparatus for continuously pumping fluid at a substantially constant flow rate is disclosed. This apparatus is comprised of a metering pump, a rotary timing valve, at least three fluid transducers, and means for synchronizing said metering pump with said rotary timing valve.

Abstract: A submersible sump pump includes a pump housing having a volute chamber in which a centrifugal impeller rotates about a vertical axis. The impeller draws water in axially from below from a fluid passage having a closed bottom, the fluid passage having a plurality of inlets located about the perimeter of the pump housing at an elevation above the level of the outlet from the fluid passage to the volute chamber. Thus, a bottom suction impeller arrangement is provided that prevents debris from the floor of the sump being drawn into the pump.

Abstract: A resonator of a hermetic rotary compressor in which noise is reduced to a maximum extent by effectively absorbing high frequency pressure components inside a cylinder of the compressor. The resonator comprises a resonator space of bi-level configuration disposed between a bearing flange and a matching cylinder face surface. This resonator space communicates with a discharge part defined in the compressor through an entrance channel which has a tapered surface to form a narrow inlet and a wide outlet. With this construction, the resonator effectively reduces the high frequency component out of gas pulsation generated in the cylinder.

Abstract: A hydrostatic machine comprises a shaft, a rotor arranged on a shaft for rotation and having radially extending opening, a plurality of pistons arranged in the radial openings and having ends extending outwardly beyond the openings, a displacement curve arranged so that the ends of the pistons slide on the curve, channels for communicating the openings with a pressure medium and including passages which open laterally at the rotor, and a device for compensating an axial thrust applied by a pressure medium to the rotor and including pressure medium-actuated additional pistons.

Abstract: A magnetic drive pump which is a type of sealers pump which utilizes magnets to drive an internal rotating assembly consisting of an impeller and inner magnet ring which is located in a containment shell. An outer magnet ring is located outside of the containment shell and is driven by outside driving means. There is no internal drive shaft. The impeller is rotatably mounted on journal bearings and an inner magnet ring is supported from the impeller in cantilever fashion.