Abstract: A system and method of using a variable geometry ejector for a bleed air system using integral bleed pressure feedback which utilizes a minimal amount of high-pressure air, thus improving the overall engine cycle performance and is easily adaptable to a multitude of different engine types. This is accomplished through the use of a variable ejector using downstream pressure feedback to control the flow and pressure.

Abstract: An ejector includes a nozzle having therein a throat portion, and a needle valve that extends at least from the throat portion to the outlet of the nozzle. The needle valve is displaced in an axial direction of the nozzle to adjust an opening degree of the throat portion and an opening degree of an outlet of the nozzle. Therefore, even when a flow amount of refrigerant flowing into the nozzle is changed, it can prevent a vertical shock wave from being generated by suitably adjusting both the opening degrees of the throat portion and the opening degree of the outlet of the nozzle. Accordingly, nozzle efficiency can be improved regardless of a change of the flow amount of the refrigerant.

Abstract: The vacuum generator is capable of quickly and securely holding and releasing a work piece and capable of reducing amount of consuming compressed air. In the vacuum generator, a first nozzle and a second nozzle jet compressed air toward a diffuser nozzle. The second nozzle has a diameter greater than that of the first nozzle. Switching means switches a state of the vacuum generator between a first state, in which a small amount of air sucked from the vacuum port, and a second state, in which a large amount of air is sucked from the vacuum port. The first nozzle, the second nozzle and the diffuser nozzle are serially arranged in that order.

Abstract: A vapor evacuating device that enables product offloaders to quickly, easily, and safely offload chemicals and the associated vapors from vessels with minimal environmental impact and inconvenience by combining vapors from a tanker vehicle with an evacuation fluid, such as water, in order to yield a solution that is easily and safely disposed.

Abstract: A method and system for evacuating vapors from a vessel comprising at least one fluid line which can have a pump configured to draw a water and/or air mixture which is combined with vapors vacuumed from a tank via another inlet, yielding a solution that can then be disposed as a liquid. Vacuum at the inlet is created by the flowing of the water or air/water mixture past the inlet. The reduced pressure of the moving liquid causes a pressure differential with the higher pressure within the tank, and thus the vapors migrate into the vapor evacuation assembly, are mixed with the fluid, and can then be disposed, or continually recycled, with the fumes stored for later disposal.

Abstract: A pump assembly is provided that includes a gerotor pump and a manifold. An aspirating member is positioned between a pump inlet cavity in the manifold and a fluid reservoir. Fluid flow generated by operation of the pump is diverted by a flow control valve and accelerates as it passes between the aspirating member and the manifold. The resulting decrease in static pressure draws the fluid out of the reservoir where it mixes with the higher velocity fluid. As the combined fluid is slowed, the static pressure increases to “supercharge” the inlet cavity to improve the inlet fill and reduce cavitation. An inlet port in the gerotor pump corresponds to the inlet cavity in the manifold. The timing and geometry of an input port is optimized to prevent noise inducing pressure spikes while maintaining sufficient back pressure in the pump chambers to collapse entrapped vapor bubbles in the fluid.

Abstract: Vacuum generator comprising an ejector nozzle which is connected to a compressed-air supply via a compressed-air line, and with a first valve for opening and closing the compressed-air line, wherein a second electrical valve is connected to the suction line of the ejector which is open in the currentless state to connect a pneumatic vacuum switch, circuited in parallel with the first valve, to the suction line.

Abstract: A pond insert more particularly intended for insertion in a garden pond is described and which has at least one electromotively driven pump (2) The pump has an inlet connection and two intercommunicating outlet connections (5, 6), whereof one is preferably oriented horizontally and one vertically. The pump can be fixed in a basket-like container (3), which can be filled with a weighting material such as gravel or the like for improving the stability of the pond insert.

Abstract: A first passage communicating with a compressed air supply port, a sixth passage communicating with a vacuum port, and an eighth passage communicating with an air discharge port for a solenoid-operated valve are arranged in parallel respectively. Further, a pressure fluid-supplying solenoid-operated valve, a vacuum-breaking solenoid-operated valve, a flow rate-adjusting screw, a suction filter, and a vacuum pressure switch are successively arranged in series in a main body section.

Abstract: A method for generating and controlling the source of vacuum produced from a source of pressurized air in communication with at least one vacuum responsive device wherein the present invention maintains the operating conditions of the system during the loss and resumption of power. The present invention provides at least one venturi for creating a vacuum through a flow of pressurized air. The present invention selectively provides a flow of pressurized air from a pressurized air source to the vacuum creating means and selectively provides a flow of pressurized air to the vacuum responsive device. A last function valve communicates with the selective providing of pressurized air to maintain the operating condition of the vacuum responsive device during the loss and resumption of power.

Abstract: A vacuum control apparatus for generating and controlling the source of vacuum produced from a source of pressurized air in communication with at least one vacuum responsive device wherein the vacuum control apparatus maintains the operating conditions of the system during the loss and resumption of power. The vacuum control apparatus provides at least one venturi for creating a vacuum through a flow of pressurized air. A first valve train selectively provides a flow of pressurized air from a pressurized air source to the vacuum creating means. A second valve train communicates with the pressurized air source to selectively provide a flow of pressurized air to the vacuum responsive device. A last function valve communicates with the first and second valve trains and a pressurized air source to maintain the operating condition of the vacuum control apparatus during the loss and resumption of power to the first and second valve trains.

Abstract: An improved liquid jet pump for moving solid or other materials is provided. The liquid jet pump includes a nozzle assembly, a suction chamber, and a target tube. The nozzle assembly pulls in atmospheric air, causing an air bearing effect around the liquid jet exiting the nozzle assembly. The liquid jet passes through the suction chamber with minimal deflection, reducing cavitation and improving mixing as educted materials enters the suction chamber and combines with the liquid jet. The combined material is directed into the target tube, which is designed to detach from the other components and is composed of abrasion-resistant material. The target tube absorbs the majority of wear, and provides ease of changing parts.

Abstract: A method for conducting suction and compression operation on a gaseous medium of thermodynamic process in the closed chamber of a closed chamber gas equipment said suction operation intended to bring the gaseous medium in to the closed chamber and said compression operation intended to compress the gaseous medium retained within the closed chamber; The gaseous medium is exposed to have direct contact with a gas which is dissimilar in composition to that of said gaseous medium and which is moving away from and towards the gaseous medium with the aid of a gas discharge means performing respectively the suction and compression operation and thereby acting as a gaseous piston. The gaseous piston may do only one of the two operations namely suction or compression. The gas discharge means may comprise a venturi means connected to the closed chamber or a gas reservoir connected to the closed chamber or both. The admittance of gaseous piston in to and out of the closed chamber may be through valve or port means.

Abstract: An ejector unit (1) is mounted on a conventional valve manifold (10) with a manifold pressurised air supply connected to an ejector (4) through channels (15, 16) and a first pilot valve (3). A suction channel (20) and a return air channel (22) are connected through manifold (10) to outlet ports from the ejector (4) suction chamber (17) and outlet nozzle (18′) respectively. The ejector unit (1) is mounted through face (8) onto manifold (10) using the same hole pattern as for valves connected to the manifold.

Abstract: A refrigeration unit having a jet pump with an automatically adjustable cross-section for the control of refrigerant flow that provides a more economical refrigeration process. The circulation of thermotransfering materials, such as a refrigerant, through the jet pump's evaporator facilitates a more efficient cooling effect.

Abstract: The invention concerns powder spray coating equipment comprising an air divider (16) to adjustably divide a total-air flow (6, 14) into a conveying-air flow (54, 57, 70) and a supplemental-air flow (56, 84, 86) in such manner that, when adjusting for a larger flow of conveying air, the flow of supplemental air shall be reduced in a predetermined ratio, and vice versa; further comprising an injector (76) to aspirate and to pneumatically convey coating powder by means of the flow of conveying air; and a supplemental-air intake (89) into the air/powder path (76, 82). The conveying-air path (54, 57, 70) and the supplemental-air path (56, 84, 86) each are fitted with at least one throttling duct each constituted by at least one channel (40, 42) in a rotatable shaft (34, 36) and by a bearing surface (39) covering the channel.

Abstract: The present invention relates to an ejector for generating negative pressure having a pressure connection discharging into a propellant nozzle, and having a suction connection which discharges via a suction conduit into a receiver nozzle. The propellant nozzle and the receiver nozzle are provided in a suction valve with a first blocking piston for the propellant nozzle. A work conduit communicating with the pressure connection and a control conduit communicating with the pressure connection are provided and a blow conduit discharging via a blow valve into the suction connection communicates with a second blocking piston, and the piston position of the second blocking piston of the blow valve being triggerable via the control conduit.

Abstract: A method and device for quick pressure relief in a hydrogen-cooled generator system. The hydrogen-cooled generator system at least includes a first and second housing part and a hydrogen seal that separates the first housing part from the interior of the second housing part. In the normal state, the first housing part contains a hydrogen atmosphere at overpressure that is separated from the interior of the second housing part by the hydrogen seal. The quick pressure relief method includes the steps of lowering the pressure of the overpressure hydrogen in the first housing part through a quick discharge line upon failure of the hydrogen seal, and exhausting gas from the interior of the second housing part through a bleed line that is connected to the quick discharge line.

Abstract: An aspirator for inflating inflatable devices such as aircraft emergency evacuation slides and life rafts using a quantity of primary gas that is stored in a tank that within the aspirator entrains a secondary gas, typically outside air, as the primary gas flows through the aspirator thereby producing sufficient gas to inflate a large inflatable structure or device as described above. The aspirator typically has injectors therein which act to promote the entrainment of large quantities of the secondary fluid using small quantities of the primary fluid thereby resulting in a large combined flow of gas forcibly flowing into the inflatable structure.

Abstract: A fluid pressure apparatus of this invention provides advanced control without imposing an excessive burden on a sequencer. When a plurality of fluid pressure apparatuses are connected to one another by manifolds, the individual fluid pressure apparatuses are provided with controller circuits each having a memory inputted with a control step, wherein each of the controller circuits activates each of control valves and a sensor based on an operating instruction issued from the sequencer to thereby execute processes such as confirmation of a controlled state, a trouble decision, etc.

Abstract: A process for operating a jet pump with a driving nozzle from which a driving medium, especially steam, exits at supersonic speed, this driving medium mixing with a gaseous load medium. According to the invention, downstream of the outlet of the nozzle in the mixing region the circumferential length is increased by a cross-sectional shape of the driving jet diverging from the circle in order to eliminate the azimuthal symmetry of the vortex structure of the driving medium, wherein the respective cross-sectional surface corresponding to the principle of continuity beginning in the jet direction with a circular cross section in the supersonic portion of the jet corresponds to the circular cross-section surface of the driving medium in conventional supersonic nozzles.

Abstract: A multistage ejector assembly which can be assembled in an extremely facilitated manner, at a low cost, and while avoiding from high precision assembling work for a plural number of nozzles and diffusers. The multistage ejector assmbly includes a casing body (2) of a channel-like shape in cross-section having an axial through hole (5) internally of a thick bottom wall for receiving a nozzle body (12) and a multistage ejector structure (14) therein. The multistage ejector structure (14) includes of an integral molded structure including diffuser-nozzles (15a) and (15b) and a diffuser (15c) of a final stage located in an axially aligned state relative to a spout hole (13) of the nozzle body and interconnected through larger diameter portions (16a) and (16b) with air sucking openings (16a) and (16b), and flanges 18a to (18c) formed around the circumference of the ejector structure.

Abstract: A portable pneumatic vacuum source includes a source of pressurized fluid and a vacuum pump in fluid connection with the pressurized fluid source, the vacuum pump operative to generate a vacuum in response to pressurized fluid flow therethrough. A nozzle is included in vacuum connection with the vacuum pump. A pressure regulator and filter combination is interposed between and in fluid connection with the pressurized fluid source and vacuum pump for adjusting pressure of the pressurized fluid entering the vacuum pump and for filtering particulates and liquids from the pressurized fluid. A relief valve is also interposed between and in fluid connection with the pressurized fluid source and vacuum pump for limiting pressure of the pressurized fluid. Finally, a check valve is positioned intermediate and in fluid connection with the vacuum pump and nozzle for preventing loss of vacuum upon cessation of pressurized fluid flow through the vacuum pump.

Abstract: A water powered sump pump has a flow control apparatus connected to a source of water under pressure and to a suction generator. Water from the flow control apparatus flows through a nozzle in the suction generator, creates a pressure drop, suck water in from a sump, and discharge water through a discharge line. The control apparatus has a variable pressure chamber and a constant pressure chamber. The constant pressure chamber is connected to a source of water under pressure and to the suction generator. A diaphragm separates the two chambers and opens and closes a passage between the water source and the suction generator. An orifice connects the two chambers. A bleed valve opens and closes the variable pressure chamber. A spring biased arm of an actuator assembly is biased in one direction to open the bleed valve, drop pressure in the variable pressure chamber, move the diaphragm and open the passage which permits flow to the suction generator.

Abstract: A fluid pressure device having a fluid unit suitable for use as a vacuum generating unit formed by connecting together a plurality of blocks having different functions, the fluid unit being connected to an external device. The fluid pressure device includes a plug-in/one-touch type electric signal connecting unit for collectively mounting a plurality of terminals in a wall surface of the fluid unit, to electrically connect the plurality of blocks to the external device. The terminals are connected to the external device by a single multi-connector means, and a plug-in/one-touch type fluid passage connecting unit, for collectively providing connecting portions within the wall surface of the fluid unit, to interconnect the external device and fluid passages defined in the fluid unit. The fluid passages are connected to the external device by a plurality of cylindrical insertion members which are inserted into the connecting portions.

Abstract: Dispenser for dispensing simultaneously two liquids held in respective flexible containers, one within the other. Concentric tubular passages are provided for flows of the liquids from their containers when pressure is applied to the outer container. The inner passage has a narrow elonage form and terminates within the outer passage a final exit section of which provides a common conduit for both flows. A reduced liquid pressure is produced at the inner passage termination by having a tapered upstream end of the conduit overlapping the termination and the conduit is configured to inhibit mixing of the flows along its length. The two liquids are thus dispensed in a single stream in which, e.g., a colored flow from the inner passage is visible in the core of the stream. By adjusting the position of the conduit taper relative to the inner passage termination, it is possible to vary the proportions of the two components in the flow.

Abstract: A vacuum control apparatus is positioned remote from the vacuum operated work holding devices themselves, thereby allowing for a remote control system over a plurality of vacuum operated work holding devices. The apparatus also provides the ability to increase the vacuum flow rate available to the vacuum operated work holding devices within the system by increasing the number of vacuum generating venturis engaged in the system. The apparatus includes a venturi manifold and a plurality of venturi nozzles in fluid communication with the manifold. A venturi control valve controls the flow of pressurized air into the manifold and venturi nozzles. The system is fluidly connected to vacuum operated work holding devices by various passages and ports in the manifold. The manifold, venturi valve and venturi nozzles are stackable in two different ways.

Abstract: A freeze and contamination resistant hydrant, for controlling fluid flow includes: a vertically elongated conduit having a lower portion adapted for installation underground, the conduit having a lower fluid inlet associated with that lower portion, and an upper fluid outlet, for passing fluid; a valve in the lower portion of the conduit; a plunger, with a stopper of substantially circular horizontal cross-section attached, extending downward through the conduit into the valve for closing and opening the same; an upper drain port in the valve above the stopper drains any fluid trapped above the valve when the valve is closed; a venturi conduit below the valve having a venturi port; and a fluid reservoir surrounding at least the lower portion of the conduit. When the valve is opened, fluid passes from the lower fluid inlet to the upper fluid outlet and through the venturi conduit to induce fluid flow from the reservoir through the venturi port.

Abstract: Method of achieving with at least two compressed air operated ejectors a desired subpressure in the shortest possible time and with the least use of energy, this method including connection of the ejectors such that they work one at a time in response to which of them is supplied with compressed air. In turn, compressed air supply is controlled in respons to the subpressure in a subpressure collection chamber common for all ejectors. An ejector array (1) for the method includes at least two compressed air operated ejectors (2, 3) each having its own optimum efficiency at the same values of the supplied compressed air. A sensor is disposed for sensing the subpressure in the chamber (23), compressed air being supplied to one ejector (2, 3) at a time, in response to the sensed pressure in the chamber (23). Compressed air is first supplied to the ejector (2) evacuating the greatest amount of air per time unit, and last to the ejector (3) generating the lowest subpressure.

Abstract: A vacuum cup control apparatus for applying and releasing vacuum in a vacuum cup includes a venturi passage for inducing a vacuum within the vacuum cup upon the flow of pressurized air therethrough. Another air flow passage extends through the housing for injecting a flow of air under pressure to the vacuum cup to relieve the vacuum therein. A sensor senses the vacuum level attained in the vacuum cup. A feedback signal is sent by the control apparatus to the external controller as an indication that a predetermined, selectable vacuum level has been achieved. The control apparatus is responsive to the sensor and signals from an external controller for applying vacuum to the vacuum cup until a predetermined vacuum level is attained in the vacuum cup.

Abstract: A vacuum cup control apparatus for applying and releasing vacuum in a vacuum cup engaging a workpiece includes a housing having a venturi passage for inducing a vacuum within the vacuum cup upon the flow of air through the venturi passage. A one-way check valve in the passage seals the vacuum in the vacuum cup upon cessation of air flow through the venturi passage. Another air flow passage extends through the housing to a control port on the housing for injecting a flow of air under pressure to the vacuum cup to relieve the vacuum therein. A sensor mounted in the housing senses the vacuum level attained in the vacuum cup. A feedback signal is sent by the control apparatus to the external controller as an indication that a predetermined vacuum level has been achieved. The control apparatus is responsive to the sensor and signals from an external controller for applying vacuum to the vacuum cup until a predetermined vacuum level is attained in the vacuum cup.

Abstract: A valve battery, including a plurality of base plates, each having a generally polygonal outer contour, a window-shaped recess therein, and two side faces, a face of one plate corresponding a face of an adjacent plate and sealingly engaging one another, closure plates being provided on the free end surfaces, a plurality of electrically actuatable individual valves mounted in the base plates, each having an inlet port, an outlet port, and an electrical connection, the mounted valves not protruding from the faces of the base plates, at least one of the base plates (4) having an associated vacuum device (31) and a compressed air connection (32) on one of the end surfaces for creating a vacuum, being interconnected for control by another of the said base plates (1) having one or more associated valves which are continuous valves (14), an inlet connection associated with each of the base plates, provided on one of the elongated side surfaces thereof, an outlet connection (A1,A2) associated with each of the valves,

Abstract: A freeze resisting valve apparatus, for controlling water flow, the combination comprising: a vertically elongated, hollow valve body having a lower portion adapted for installation underground, the body having a lower water inlet associated with the lower portion, and an upper water outlet, for passing a stream of pressurized water through the body; a water reservoir adapted for installation underground and having communication with the body lower portion via an ejector port; a valve seat projecting in the lower portion of the body and having a narrowed passage extending upwardly and positioned to increase pressurized water flow velocity in proximity to the port, the ejector port being proximate the level of the seat; a valve member tapering downwardly toward an apex always remaining in alignment with the narrowed passage as the stopper member moves toward and away from the seat to effect drainage of water in the valve body downwardly, in the body past the stopper to the reservoir when the stopper is closed

Abstract: A pneumatic vacuum gripping assembly for attachment to a suction gripper device is coupled by way of a fluid flow link to a venturi for controlling the vacuum of the suction gripper device comprises an integrated housing assembly having a venturi and a pneumatic fluid-flow control valve unit. The valve unit controllably interrupts fluid communication between a main supply inlet port and the venturi and is controlled by the output of a pressure sensor that is integrated within the housing assembly. The assembly further includes a reset valve arranged in a compact, stack configuration with the other components of the valve unit and ported to the venturi vacuum line for controllably `blowing off` the suction gripper device from a gripped object.

Abstract: A vacuum breaking device for an ejector pump is provided. The vacuum breaking device according to the present invention features that it is provided with a movable sealing valve for blocking the outlet port of the ejector hole of the pump when a vacuum generated in a system within the pump is be broken. The valve is arranged in opposite relationship with the ejector hole of the pump and shifts to block the outlet port due to the pressure of compressed air supplied to the air sucking chamber of the pump so that the leakage of the vacuum breaking compressed air from the ejector hole is prevented thereby increasing the efficiency of vacuum breaking operation. The vacuum breaking device is applicable to a vacuum sucking device for attracting and sucking an article so as to transfer it to a desired place.

Abstract: A jet pump, in particular for hot-water heating systems or water-heating systems with return-flow mixing has a feeder head which is connected with a housing containing the receptor nozzle 13. The housing (7) contains a mixing tube (14) which is connected via a diffuser if needed with a second line connection (12), is coaxial with an injector nozzle (10) and adjoins the receptor nozzle (13); the mixing tube (14) also extends longitudinally through a chamber (22) of the housing in which at least a third line connection (18) and, if desired, a fourth line connection (19), directed respectively transversely to the mixing tube, discharges.In order to attain, e.g.

Abstract: An oil ejector for conveying a quantity of oil under pressure to a region to be lubricated, the including a nozzle member (4,18) having an inlet end for receiving a supply of oil under pressure and an outlet end for ejecting oil supplied to the inlet end, the outlet end having an outlet passage (6,20) through which oil is ejected at a higher velocity and lower pressure than the oil entering the inlet end, the ejection pressure being a function of outlet passage (6,20) cross-sectional area, wherein the nozzle member (4,18) includes, at the outlet end, a fixed part (4) having at least one opening (6) and a movable part (18) mounted to the fixed part (4) for movement transverse to the ejection direction and having at least one opening (20) at least partly overlapping the opening (6) in the fixed part (4), with the region of overlap between the openings (6,20) defining the outlet passage (6,20), and the ejector further includes a remotely actuatable displacing mechanism (24,26) coupled to the movable part (18) fo

Abstract: A control system for applying and releasing vacuum in a work-gripping vacuum cup includes a housing having a venturi passage for inducing a vacuum within the cup upon the flow of air through the venturi passage. A one-way check valve in a passage extending through the housing between the venturi and the vacuum cap will seal the vacuum in the cup upon cessation of flow through the venturi passage, thus enabling the cup to grip the workpiece in response to a timed pulse of air through the venturi and to maintain the grip after the air flow is stopped. A second valve controlled passage through the housing enables air under pressure to be injected into the vacuum cup to quickly release its grip on the workpiece.

Abstract: A jet pump has a chamber with a jet nozzle at the inlet port and a diffuser fitted into the outlet port with a suction port fitted in the chamber. A ball valve having a passage therethrough is fitted ahead of the jet nozzle and angular rotation of the ball valve creates a swirling action in the jet nozzle and adjustment thereof will provide maximum pumping action for various operating conditions.

Abstract: A water jet aerator in combination with a diverter valve including an aerator housing, a valve body that is rotatably positioned within the aerator housing, and a swivel nozzle. The aerator housing includes a water inlet conduit, a water outlet conduit, and an air inlet conduit, while the valve body forms two chambers, a diverter chamber and an aeration chamber. As the valve body is rotated in one direction within the aerator housing, water flow from the water inlet conduit to the aeration chamber is diverted to the water outlet conduit, while the air inlet conduit is proportionally closed to the aeration chamber. As the valve body is rotated in the other direction, water flow from the water inlet conduit to the water outlet conduit is diverted to the aeration chamber, while the air inlet conduit is proportionally opened to the aeration chamber.

Abstract: A liquid heating apparatus capable of using low pressure steam and having a temperature control system to automatically control the output temperature of a heated liquid. The apparatus includes a tubular housing having an internal annular seal, and a liquid nozzle, that is connected to a source of liquid to be heated, is mounted for axial movement in the housing relative to the seat. The annular space between the nozzle and the seat that defines an annular diverging passage which communicates with a source of steam under pressure. The steam is accelerated as it is discharged through the diverging passage into contact with the stream of liquid being discharged from the liquid nozzle. The liquid and steam then pass through a converging mixing chamber where the momentum energy of the steam transfers to the liquid as the steam condenses on the liquid. The mixture then passes into a diverging diffuser section and the heated liquid is discharged from the diffuser through a discharge conduit to a site of use.

Abstract: A self-regulating vacuum control valve with a needle valve operating in a narrow central bore that regulates the flow of pressurized air from a pressure source into such narrow central bore for passage and discharge from an enlarged bore. A vacuum is pulled in passageways in such enlarged bore which exert a vacuum pull on a control chamber and on one end of a diaphragm means. The diaphragm means is connected to the needle valve and has its one end subjected to atmospheric pressure. Such diaphragm and needle valve are spring biased to increase the air flow past such needle valve in opposition to the vacuum pull on such diaphragm. Such spring bias is adjustable to provide a predetermind vacuum pull on the control chamber that can be connected to a deicer pad for maintaining a predetermined vacuum pull thereon.

Abstract: A method for producing a flow of fluid comprised of at least phases from at least two primary flowing fluids, one of which has at least one liquid phase, and the other at least one gaseous phase, wherein the two primary fluids flow out respectively through one and another orifice, both of which may be streamlined, then a multiphase mixture is produced because the various flows are made to flow out through a third orifice and the channel sections of the orifices are adjusted in such a way so as to regulate at least one of the rate and pressure of the different flows, whereby a homogeneous multiphase flow is produced while minimizing the loss in energy of the different fluids.

Abstract: A method and apparatus for ejecting fluids through use of a high pressure liquid motive fluid by forming hydraulic slugs from said motive fluid and conducting it through conventional ejection mechanisms, entraining a fluid which is to be ejected and depositing it into containment of user's choice. A pulser apparatus is employed which embodies the concept of abruptly starting and stopping high pressure motive flow, contemporaneously constricting the downstream flow through use of either inlet or instream interruption means, and entraining quanta of fluid to be ejected, said entrainment being the urging of said discrete quanta by the momentum of a series of hydraulic slugs formed by the aforementioned method.

Abstract: A vacuum valve-sensor device mounted on a vacuum source and maintaining the vacuum generated by the vacuum source to a required level. It includes a one-way valve which allows gas to flow towards the vacuum source but not away therefrom, and a pressure sensor on the side of the one-way valve remote from the vacuum source. The one-way valve includes a valve seat through which flow of gas is directed and a valve element biased toward seating on the valve seat from the side of the vacuum source. The pressure sensor may be located on the side of the valve seat remote from the valve element thereof, and may include a V-ring seal member fitted on the valve element.

Abstract: Herein disclosed is an ejector pump which can be used favorably with a sucking disk for carrying an article. In the bore of a pump body, there are fitted a nozzle block having a nozzle hole and an ejector block which has an ejector hole aligned with the nozzle hole of the nozzle block, so that a suction chamber formed between the nozzle hole and the ejector hole may communicate with a suction port which is formed in one side of the pump body. Fitted in the pump body, too, is a spool valve for opening or closing a communication passage providing communication between the nozzle hole and the compressed air inlet port of the pump body. The spool valve is controlled by an electromagnetic change-over valve disposed outside of the pump body. The pump has the advantage that the compressed air can be supplied at a high flow rate to establish a strong sucking force even with a relatively small-sized electromagnetic change-over valve.

Abstract: An ejector pump which is used with a suction disk for carrying an article. In the bore of a pump body, there are fitted a nozzle block having a nozzle opening and an ejector block which has an ejector opening aligned with the nozzle opening of the nozzle block, so that suction chamber formed between the nozzle opening and the ejector opening may communicate with a suction port which is formed in one side of the pump body. In the bore of the pump body, too, is disposed an electromagnetic valve which has a moving member for opening and closing the entrance of the nozzle opening with its leading end position.

Abstract: An adjustable ejector capable of adjusting the fluid flow conditions resulting from fluid flow through the ejector. Adjustment means are provided for varying the fluid presentation size ratio of the inlet nozzle throat to the mixing throat. The adjustment means includes at least one adjustable path structure disposed in either the inlet nozzle or the mixing throat, or both.

Abstract: A hydrokinetic amplifier 10 increases the vapor momentum transfer coefficient by directing an annular liquid jet 20 into an acceleration chamber 13 and impinging high velocity vapor streams on both the interior and exterior surfaces of annular liquid jet 20. Impinging merger of the inner vapor stream on the inner surface of liquid jet 20 transfers all the vapor momentum to the liquid. The outer vapor stream surrounding annular liquid jet 20 helps keep liquid out of contact with the acceleration chamber wall 19 and otherwise transfers a substantial portion of its vapor momentum to the liquid on which it impinges and condenses. Multiple annular liquid nozzles 11a and 11b and corresponding multiple vapor nozzles 50a and 50b can be arranged concentrically to capture all the momentum of the inner vapor streams, leaving only the outermost vapor stream to experience friction losses along the acceleration chamber wall 19.

Abstract: A temperature-actuated flow control device has a fluid inlet connected to an exhaust line with a control chamber located therebetween. The control chamber has a free-floating bi-metallic circular element which is flexed in response to temperature changes between a first position stopping flow between the inlet and the exhaust line and a second position opening the flow therebetween. This flow control device, when adapted to a gas sampling system, allows the bi-metallic element remain in a first position at normal operating temperatures to permit the continuous sampling of the sample gas. Whenever the temperature falls below the dew point of the sample gas, the bi-metallic element returns to its second position to stop the sampling of sample gas by the system to prevent condensation in the system.