Abstract: An electromagnetic diaphragm pump, the mounts for positioning and mounting the field cores on the housing and the fitting portions for fitting the peripheral portions of the diaphragms are integrally formed with the housing so that the attaching positions of the field cores never shift after they are attached. Screw holes are formed through the mounts for attaching the field cores to make the attaching and fixing of the field cores easier.

Abstract: Motor driven pumps are provided of the canned, or isolated stator type which include a center shaft, rotating shaft support bearings, controlled cooling, and automatic thrust balancing construction, utilizing fixed orifices. A snubber is carried on the shaft at the shaft end opposite to the impeller. The snubber has an en surface which faces an end liner plate. Thrust balancing is achieved by axial movement of the shaft which permits fluid flow between the end liner plate and the snubber.A snubber is carried on the shaft at the shaft end opposite to the impeller. The snubber has an end surface which faces an end liner plate. Thrust balancing is achieved by axial movement of the shaft which permits fluid flow between the end liner plate and the snubber.

Abstract: A variable occlusion device includes a device housing having an occlusion track adapted to receive one or more loops of flexible tubing and having an arcuate reactive surface. The device also includes a rotor member mounted for rotation within the housing about a device axis. The rotor includes a number of carriage passageways or tracks, each passageway or track with an occluding member carriage and occluding member assembly movably mounted therein. The carriage and occluding member assemblies are each adapted to move between an extended position in which the occluding member bears against and collapses the tubing received in the occlusion track, and a retracted position in which the occlusion member is drawn away from and out of contact with the tubing in the occlusion track. The peristaltic device also includes a fluid distribution system for providing an operating fluid from a remote fluid supply under a desired pressure to the carriage passageways of the rotor.

Abstract: The invention relates to a compressor having a piston and rod assembly which is segmented to allow adjustment of the compressor's output. In particular, fasteners accessible from the top surface of the piston can be removed so that shims can be added or removed from piston rod. The addition or removal of shims lengthens or shortens the piston rod so that the compression ration can be fine tuned. These adjustments, as well as replacement of the piston seal, can be accomplished without extensive disassembly of the compressor.

Abstract: A peristaltic pump wherein an annular internal surface of the housing and a sleeve-like annular section of an elastically deformable diaphragm define an annular pumping chamber which communicates with the fluid-admitting inlet and with the fluid-discharging outlet of the housing. The diaphragm is provided with an extension which projects radially outwardly from the sleeve-like section and is partially anchored in a socket of the housing. A weakened portion of the extension between the anchored portion and the sleeve-like section is received in a compartment between the inlet and outlet of the housing and is provided with one or more empty or fluid-filled cavities, with one or more recesses, with one or more holes and/or other elasticity enhancing features to ensure that the resistance of the sleeve-like section to deformation will be uniform in each of its parts including that which is integral with the extension.

Abstract: Rectangular pistons are driven in a circular orbit by two spaced eccentrics on a common crankshaft. The displacement chambers reciprocate with a lateral motion parallel with the crankshaft. The radial forces created by the fluid pressure in the displacement chambers are balanced by a connection to the crankshaft through rotatable and slidable antifriction bearings. During the reciprocating lateral motion of the chambers, port openings located in the outer ends of the chambers are connected alternately to matching intake and exhaust port openings in the adjacent surfaces of the casing to provide a reversible valveless control of the fluid to and from the chambers. The apparatus can be used either as a pump or motor without internal modifications. The pistons are secured together as one piece and follow identical orbital paths. Each pair of opposing displacement chambers are secured as one piece and radially connected to the crankshaft.

Abstract: A pressure responsive driver couples a reciprocating motor output to a reciprocable piston of a double-acting pump. In one embodiment, the driver comprises a single spring and in another a pair of springs, which transfer reciprocation forces of the motor output to the piston to reciprocate the piston through its pumping strokes. The spring(s) transfers the entirety of the reciprocation forces of the motor output to the piston until a selected outlet pressure from the pump is reached, whereupon the spring(s) compresses to absorb cranking forces and limit maximum pump outlet pressure to about the selected pressure. The reciprocating motion of the motor output is divided between the spring(s) and piston, such that the extent of flexure of the spring(s) is inversely proportional to movement of the piston, whereby the spring(s) takes up any motion of the motor output not used to move the piston.

Abstract: A disposable cell for a diaphragm-actuated fluid-transfer control device, which comprises two cell walls peripherally joined to one another, of which at least one wall is flexible, and is adapted to be flexed from a first position, in which it is located in close proximity to the other wall, reducing the space enclosed between the two walls to a minimum, to at least a second position, in which at least some regions of the flexible wall have moved away from the other wall, thereby increasing the space between the two walls, and an inlet port and an outlet port provided in at least one of the walls. There is also described a combination of a disposable cell with a diaphragm-actuated fluid transfer control device.

Abstract: A mounting system for electric pumps used in automotive vehicles, especially those in which the pump is installed in the fuel tank. To reduce pump and pump motor vibrations and noise, which may be objectionable to passengers, the pump is mounted within a jacket enclosure carried in the vehicle fuel tank. A suspension for the pump within the jacket consists of identical mount rings of relatively soft flexible material which has internal and external relatively thin projections to contact the inner walls of the jacket on the outside of the ring and to contact the pump housing on the inside of the ring. Radial continuations of the projections establish the axial location of the pump within the jackets.

Abstract: The invention provides an apparatus and method for handling a solid/liquid mixture, for example for conveying fish immersed in a fish/water mixture. The apparatus has a receiving chamber to receive the mixture through an inlet valve thereof when the chamber is subjected to low pressure, and to discharge the mixture through an outlet valve thereof when pressure in the chamber is increased. A quantity sensor is responsive to a pre-determined quantity of mixture within the chamber to isolate the chamber from low pressure when the pre-determined quantity is reached. The inlet and outlet valves are responsive to pressure differences thereacross. The inlet valve is positioned adjacent an upper portion of the chamber above maxium upper level of mixture within the chamber and has seat clearing structure to clear the inlet valve of solids when flow therethrough ceases. Inlet and outlet flow sensors are responsive to flow through the inlet and outlet valves respectively.

Abstract: An ultrasonic air-in-line detection system for use in detecting air bubbles in the fluid line of a disposable cassette mounted on a main pump unit is disclosed which automatically loads the outlet tubing at the bottom of the cassette into a slot in an ultrasonic sensor housing when the cassette is installed on the main pump unit. The system uses a tubing adapter mounted on the outlet tube below the cassette, with the tubing adapter having a tapered top end. The tubing adapter interacts with a pair of ramps located on the bottom and front of the ultrasonic sensor housing around the slot to draw the tubing adapter into a recess located on the bottom of the ultrasonic sensor housing, thereby drawing the outlet tubing fully into the slot between an ultrasonic transmitter and an ultrasonic receiver in the ultrasonic sensor housing when the cassette is installed.

Abstract: A magnetic pump drive comprises a double-walled isolating shell having an inner shell and an outer shell. The inner shell and the outer shell are in contact at least along a cylindrical section of both shells. In the contact area, a channel system is incorporated between the shells by means of which channels the intactness of both shells may be checked. Channels of the channel system have the shape of a screw-channel. The magnetic pump drive so constructed closely approximates the characteristics of one constructed with a unitary thick-walled isolation shell.

Abstract: A fluid motor is disclosed that has a housing with a body portion formed as a hollow circular cylinder. A series of peristaltic tubes are disposed in the housing with one end of each tube leading from an inlet manifold on the housing and with the other end of the tubes open to the hollow interior of the housing. The tubes are disposed about the inner perimeter of the cylindrical body. A pair of rollers engage with each tube. The rollers for each tube are mounted on the ends of arms that extend in diametrically opposite directions from a motor shaft journaled in the housing. The rollers for each tube are angularly displaced with respect to the rollers for the other tubes about the axis of the motor shaft. Fluid under pressure entering the inlet will cause the rollers to advance along the length of the tubes and thereby rotate the motor shaft.

Abstract: A vertical barrel pump wherein the barrel casing is not provided with an integral flange. The flange is a separately produced part whose upper side is engaged by an external shoulder of the barrel before the pump housing is mounted in and is attached to the barrel by way of the flange. The flange can constitute a base plate which is made of reinforced concrete and is embedded in the foundation of the barrel pump.

Abstract: A refrigeration gas compressor unit having a casing, an electric motor driven compressor mounted in the casing, a housing containing and substantially isolating the inner cavities or passages of the motor from the casing cavity, refrigerant suction port in the casing, a primary-feed conduit connecting the suction port to the intake of the compressor, a secondary-feed conduit connecting the suction port to the primary-feed conduit and in part consisting of the passages between the housing, rotor and stator of the electric motor, a refrigerant flow control associated with the secondary-feed conduit for regulating the flow of refrigerant therethrough, and a refrigerant discharge port in the casing communicating with the compression chamber of the compressor.

Abstract: A low pressure drop valve connectible to a source of pressurized hydraulic fluid for modulating hydraulic fluid flow is provided; it includes a valve body defining an axially extending tapered bore and having hydraulic flow inlet and outlet ports, a plug valve movable axially in that bore and having an externally tapered surface facing the tapered bore and movable axially relative thereto to increase or decrease a gap formed between the tapered surface and the tapered bore, for controlling the flow of hydraulic fluid via the gap and at least one of said ports, and apparatus responsive to a side stream of pressurized hydraulic fluid to control axial movement of the plug valve in the tapered bore, including first and second pistons connected with the plug valve to move axially therewith, the valve body forming first and second cylinders respectively receiving the pistons for application of hydraulic fluid pressure to the pistons for displacing the pistons and plug valve axially, and protective O-rings in the cy

Abstract: A well pumping system uses a closed gas cycle to periodically unload a pumping chamber in a well. The system includes a tubing string having a downhole pumping chamber providing a check valve at the lower end. A packing assembly defines the upper end of the pumping chamber and includes a dip tube having a check valve allowing upward liquid movement through the dip tube. A conduit passes through the packing assembly. Pressurized gas is periodically pumped down the conduit to force liquid upwardly through the dip tube and tubing string. Cycling of the pressurized gas is controlled by a liquid seal control assembly at the surface. When the pumping chamber has been unloaded, the gas therein flows up the conduit and through the seal control assembly to a suction tank. The pressurized gas is thus maintained in a closed cycle.

Abstract: A hermetic compressor according to the present invention has an improved operating efficiency for use in a cold storage chamber, freezing chamber or the like . The compression includes a suction pipe which is formed by a material having heat conductivity lower than that of a casing of the hermetic compressor so that heat of the closed casing is not easily transmitted to the suction pipe. In this manner heating of the drawn in cooling medium gas is inhibited, and thus, cooling efficiency can be improved by preventing discharge of a low density cooling medium into the cooling system through compression of the expanded cooling medium gas.

Abstract: A hermetic motor-compresosr having separate discharge cavities in the compressor body for each pumping cylinder, a common discharge gas plenum for the entire compressor, and an impedance tube between each cavity and said plenum, thereby signficantly improving the sound attentuation of discharge gas pulses.

Abstract: A self enclosed filter pump system (10) is provided to deliver precise quantities of selected fluids. The system (10) includes a pump assembly (12) of a pneumatically controlled type and a modular filter and fluid bag assembly (14) adapted to mate with the pump assembly (12) during use. The filter and fluid bag assembly (14) is a flexible component which includes a container portion (20) for storing enclosed fluid (16) and an extension portion (22) for mating with the pump assembly (12). A series of fluid flow passages (35) create a fluid flow path from the storage chamber (34) to a first value bubble (36), a pump/filter bubble (46), a second valve bubble (52) and an outlet port (56). A filter membrane (48) may be secured within the pump/filter bubble (46) to filter the fluid (16) to remove particulate matter. The various bubbles (36, 46 and 52) are occluded and opened by pneumatic pressure applied to matching chambers (78, 88 and 94) in the pump housing (62).