Abstract: A self-priming jet pump includes a pump body provided with a water inlet and a water outlet. A jet tube and an impeller are arranged in the pump body. The jet tube is communicated with the water inlet and an inlet of an impeller. A first channel is arranged on the outer periphery of the jet tube. The first channel is communicated with the water inlet and the impeller. A cross-section of the first channel is a closed or open annular structure, and the first channel is around the outer periphery of the jet tube. The first channel is provided with a valve core. When a pressure at the water inlet is greater than a predetermined pressure at the impeller, the valve core moves to switch on the first channel. A cavitation problem is relieved by arranging the flow-increasing channel.

Abstract: The present disclosure relates to a gas mixing apparatus for a boiler, and the gas mixing apparatus includes a housing provided in the form of a hollow pipe opened at upper and lower sides thereof and having a first gas inlet port through which fuel gas is introduced from the outside, and a mixing pipe including a pipe body provided in the housing and configured to allow air to flow therein, the mixing pipe having a second gas inlet port provided at a lateral side of the mixing pipe and configured to allow the fuel gas to be introduced therethrough, and fluid guides provided at an outer side of the pipe body and configured to guide a flow of the fuel gas from the first gas inlet port to the second gas inlet port.

Abstract: A fluid mixing apparatus includes mixing conduits that extend through a fluid plenum and that define injection holes therethrough. The fluid plenum, which surrounds a first wall defining a main passage fluidly coupled to a low-pressure fluid source, is surrounded itself by a second wall defining a high-pressure plenum fluidly coupled to a high-pressure fluid source. The mixing conduits fluidly couple the high-pressure plenum to the main passage, and the fluid from the fluid plenum is delivered with the high-pressure fluid to the main passage, where the fluids mix before being discharged from an outlet of the main passage. The fluid mixing apparatus may be used to mix one or more fuels with high- and low-pressure air in a gas turbine combustor. Alternately, the fluid mixing apparatus may mix a fluid with high- and low-pressure water streams.

Abstract: A turbomachine includes a rotating group with a turbine wheel. The turbomachine also includes a housing that houses the rotating group, wherein the housing defines a turbine outlet passage for exhaust from the turbine wheel. The turbine outlet passage is directed in a downstream direction along an axis of the turbine outlet passage. The turbomachine includes an air bearing system with at least one bearing component that supports the rotating group for rotation relative to the housing. The air bearing system includes a bearing cooling path that is fluidly connected to the at least one bearing component and that has a bearing air line outlet. The bearing air line outlet is fluidly connected to the turbine outlet passage and is directed in the downstream direction along the axis.

Abstract: An environmental control system includes a refrigerant circuit with a pump segment and an evaporator segment, an evaporator arranged along the evaporator segment and in fluid communication with of the refrigerant circuit, and a coolant circuit. The coolant circuit extends through the evaporator and is thermally coupled to refrigerant circuit by the evaporator, the coolant circuit including a first segment and a second segment arranged in parallel with one another to transfer heat from a first zone to a first portion of liquid coolant traversing the coolant circuit and transfer additional heat from a second zone to a second portion of coolant traversing the coolant circuit. Aircraft and environmental control systems are also described.

Abstract: An aspirator assembly for inflating an emergency slide. The aspirator assembly includes a bell housing, a mixing chamber, and a nozzle assembly. The bell housing includes a ring defining an inlet port at which a check valve is located and into which ambient air can flow. The mixing chamber has an outlet port. The nozzle assembly is located in the mixing chamber and includes plural passageway sections defining concentric rings and cross bars. The passageway sections include internal passageways in communication with plural nozzle jets through which a compressed air is introduced into the mixing chamber to mix with the ambient air. The passageway sections are of an airfoil shape cross-section having a rounded leading end directed towards the inlet port and a trailing end is directed toward the outlet port to reduce air turbulence within the mixing chamber.

Abstract: A multistage aspirator for an inflatable assembly may comprise a first end defining a primary gas inlet and a second end defining a gas outlet. An internal surface of the multistage aspirator may define a flow path extending from the primary gas inlet to the gas outlet. A first stage of the multistage aspirator may include a first stage orifice extending from the internal surface to an external surface of the multistage aspirator. A second stage of the multistage aspirator may include a second stage orifice located downstream of the first stage orifice and extending from the external surface to the internal surface.

Abstract: A fluid conduit includes, a body, a first conduit portion connected to the body, a second conduit portion connected to the body, and a base connected to the second conduit portion. The body, the first conduit portion, the second conduit portion, and the base may be formed as a monolithic component via additive manufacturing. A method of making a fluid conduit may include forming sets of layers. The set of layers may include parts or portions of the fluid conduit and/or supports.

Abstract: The invention relates to a jet pump collector comprising a convergent duct extending along the longitudinal axis (AX) and comprising an intake opening for a fluid to be withdrawn, this convergent duct having a restriction shape terminated by a reduced end having a smaller cross-section than its intake opening. This convergent duct is equipped with a tube (17) orientated perpendicular to the longitudinal axis longitudinal (AX), this tube (17) comprising an outer portion extending outside of the convergent duct and being terminated by an intake opening (31) for a propulsion fluid, and an inner portion extending in the convergent duct and comprising a plurality of distribution openings (18, 19) for the propulsion fluid which are orientated towards the reduced end.

Abstract: The present invention relates to a vacuum pump using a profile. The vacuum pump according to the present invention comprises: a hollow profile having a longitudinal mounting hole and a vacuum chamber formed adjacent to each other; an ejector pump arranged inside the mounting hole in the longitudinal direction; and end caps provided in both openings of the profile, respectively, so as to have a through-hole formed therein so as to correspond to the inflow opening or the discharge opening. Particularly, the first cap near the inflow opening is designed to have a passage through which the vacuum chamber and the mounting hole communicate with each other. The vacuum pump structure according to the present invention is considered to be a vacuum pump structure using at least a so-called “profile” best designed to make fabrication of the vacuum pump convenient and to improve vacuum characteristics.

Abstract: The invention provides an ejector for generating a vacuum, a drive nozzle for generating a drive jet of air from a compressed air source and directing the drive jet of air into an outlet flow passage at the outlet of a drive stage of the ejector to entrain air in a volume surrounding the jet of air into the jet flow to generate a vacuum across the drive stage. The drive nozzle substantially consists of an inlet flow section and an outlet flow section aligned in a direction of air flow through the nozzle. The outlet flow section diverging in the direction of airflow, from an outlet end of the inlet flow section to an exit of the nozzle, the outlet flow section having a shape which is more divergent near the outlet of the inlet flow section and less divergent near the exit of the nozzle.

Abstract: An aspirator includes an aspirator body having at least one flapper door designed to allow intake of a gas from an environment of the aspirator. The aspirator also includes an aspirator barrel having an end tip, a compressible spring, and a fabric positioned about the compressible spring, and designed to extend in response to receiving the gas and to transfer the gas from the aspirator body to the inflatable flotation device. The aspirator also includes a gas valve designed to receive a fluid from a compressed fluid source. The aspirator also includes a nozzle positioned within the aspirator body, coupled to the gas valve, and designed to receive the fluid via the gas valve and to direct at least a portion of the fluid towards the aspirator barrel such that the at least one flapper door allows the gas to flow from the environment into the aspirator barrel.

Abstract: An evacuator for supplying vacuum to a device in a boosted engine air system is disclosed. The evacuator defines a body comprising a converging motive section, a diverging discharge section, at least one suction port, and a Venturi gap located between an outlet end of the converging motive section and an inlet end of the diverging discharge section. A lineal distance is measured between the outlet end and the inlet end. The lineal distance is decreased in length if higher suction vacuum at a specific set of operating conditions is required and the lineal distances is increased in length if higher suction flow rate at the specific set of operating conditions is required.

Abstract: A system is disclosed for providing dynamic vacuum control to an end effector of an articulated arm. The system includes a first vacuum source for providing a first vacuum pressure with a first maximum air flow rate, and a second vacuum source for providing a second vacuum pressure with a second maximum air flow rate, wherein the second vacuum pressure is higher than the first vacuum pressure and wherein the second maximum air flow rate is greater than the first maximum air flow rate.

Abstract: The invention provides a phase transformation heat exchange device. The device includes an inner tube, an outer tube, and a heat exchange medium; the space between the inner tube and the outer tube forms a whole or a part of a liquid phase region; a whole or a part of space inside the inner tube forms a vaporization region; the heat exchange medium with a relatively high pressure inside the liquid phase region enters the vaporization region with a relatively low pressure while being heated in vortex flow, and flows out of the device after being vapored, so as to complete heat exchange. The device can be applied to DSG systems of the solar energy photothermal field, and can also be applied to an input-output system of a heat storage system, or the field of boiler heating. It is achieved with safe operation, low cost, and good application range.

Abstract: A method for the mechanical reinforcement of elastomer polymers, of a chemically unmodified lignin with available functional groups which has a specific surface area of between 0.5 m2/g and 5 m2/g, and preferably between 1 m2/g and 2.5 m2/g. Also an elastomer thus reinforced, in particular without carbon black.

Abstract: Disclosed herein is an autonomous induction heat exchange method using a pressure difference caused by heat exchange in a single pipeline. In addition, the present invention relates to a gas compressor and a heat pump using the method. The present invention does not require a separate drive device. Therefore, occurrence of vibration or noise can be fundamentally prevented. Consumption of power for compressing gas or heat exchange can be minimized. Furthermore, gas circulates in an autonomous induction manner using a pressure difference. Thus, the length, size and structural shape of a gas compressor or a heat pump can be modified in a variety of ways. Thereby, the present invention can be easily used in different kinds of apparatus and systems and can be easily applied to small heat exchange modules using micro-channels as well as large heat exchange systems.

Abstract: To provide a sputum aspirating apparatus capable of automatically aspirating sputum safely. a sputum aspirating apparatus includes a suction line, a switching unit, a measurement unit, and a control unit. The suction line has a suction inlet which aspirates sputum produced in patient's respiratory tract; and an accommodating part maintained at negative pressure, which accommodates the aspirated sputum. The switching unit is in the suction line, and can switch between first state where the suction inlet communicates with the accommodating part, and second state where the suction inlet is shutoff from the accommodating part. The measurement unit measures the expired air being aspirated into the accommodating part, under the first state. The control unit can switch the switching unit from the second state to the first state during expiration, and keep the first state when the expired air measured by the measurement unit is under a predetermined value.

Abstract: A pneumatic evacuation pump includes an inlet assembly having an inlet valve, a charging port, and purge air injection means. A chamber includes a charge end opening to the charging port, and a discharge end. A delivery assembly includes a passage between the discharge end and a delivery outlet, a delivery valve interposed in the passage between the discharge end and the delivery outlet, and a venturi vacuum source opening to the passage between a discharge valve and the discharge end. Exhaust air injection means located downstream of the discharge valve utilizes exhaust air from the venturi vacuum source. A compressed air supply supplies the venturi vacuum source and the purge air injection means. Control means acts to coordinate a cycle of operation of the venturi vacuum source, the purge air injection means, the exhaust air injection means and the inlet and delivery valves.

Abstract: A method of entraining a second fluid in a first fluid is provided. The method comprises supplying a first fluid to a processing passage (4) having an inlet (6) and an outlet (8), and supplying an entrainment fluid to a nozzle (10) which opens into the processing passage (4) intermediate the passage inlet (6) and the passage outlet (8). A second fluid which will undergo a change of phase and/or state when added to the first fluid is also provided, and supplied to a first port (22) opening into the processing passage (4) adjacent the nozzle (10). The entrainment fluid is injected from the nozzle (10) into the processing passage (4) so as to form a dispersed phase of the first and second fluids in a continuous vapor phase, and the vapor phase is condensed downstream of the nozzle (10). A device suitable for carrying out such a method is also provided.

Abstract: A pressure washer includes a prime mover, a water pump, the water pump including a pump inlet for receiving fluid from a fluid source and a pump outlet for supplying a pressurized primary fluid, a jet pump including a primary fluid inlet fluidly coupled to the pump outlet, a secondary fluid inlet, and a fluid outlet, and a spray gun configured to be fluidly coupled to the fluid outlet of the jet pump, the spray gun including a spray gun outlet having a variable effective flow area. Wherein, in operation, in a high pressure operating mode, the pressurized primary fluid flows through the jet pump and exits through the fluid outlet of the jet pump, and in a high flow operating mode, the pressurized primary fluid flows through the jet pump and entrains a secondary fluid supplied through the secondary fluid inlet, resulting in a combined fluid flow.

Abstract: A supersonic ejector assembly may include a housing manufactured from a solid piece of material, a first ejector assembly positioned in a first bore formed in the housing and secured therein by a first input side flange positioned over an input end of the first bore and an output side flange positioned over an output end of the first bore, and a second ejector assembly positioned in a second bore formed in the housing and secured therein by a second input side flange positioned over an input end of the second bore, the second bore terminating into the first bore proximate a suction input of the first ejector assembly.

Abstract: A pneumatic vacuum generator includes at least one venturi nozzle having a flow cross section which deviates for a circularity. The venturi nozzle may thus have a substantial rectangular or non-circular flow cross section like for example an oval flow cross section or an elliptical flow cross section. At least two plates are disposed in parallel relationship and joined in sandwich construction, with one of the plates constructed to accommodate the venturi nozzle.

Abstract: Low pressure off gases such as from dry gas seals may be recompressed to a higher pressure using multiple tandem supersonic ejectors in which upstream ejectors operate at a higher nozzle exit Mach number than down stream ejectors and all ejectors are operated at exit Mach numbers greater than 1.

Abstract: A pneumatic vacuum generator includes at least one venturi nozzle having a flow cross section which deviates for a circularity. The venturi nozzle may thus have a substantial rectangular or non-circular flow cross section like for example an oval flow cross section or an elliptical flow cross section. At least two plates are disposed in parallel relationship and joined in sandwich construction, with one of the plates constructed to accommodate the venturi nozzle.

Abstract: The water rocket engine with a two-phase nozzle includes a water rocket propulsion system having a reservoir, and a nozzle assembly disposed along a central longitudinal axis therein, the nozzle assembly comprising an inverted cup shaped fluid capture vessel having a substantially concave sidewall and extending away from an elongated tube. Open lower portion of the fluid capture vessel forms a fluid inlet. The elongated tube has a concave shaped side wall that forms a nozzle gas inlet at an upper portion of the tube, a nozzle outlet at a lower portion of the tube, and a passageway disposed between the tube upper portion and the tube lower portion. Within the confines of the capture vessel, fluid injection holes are disposed in the tube sidewall to provide fluid intake into the nozzle passageway where fluid and gas combine to form a two phase propellant.

Abstract: A jet pump comprising: a nozzle apparatus having a header portion including, inside, a first pipe member forming a suction fluid passage for introducing suction fluid and the header portion surrounding the first pipe member, for introducing driving fluid, and a nozzle portion connected to the header portion, surrounding the first pipe member and forming an annular ejection outlet for ejecting the driving fluid; a jet pump body for mixing the driving fluid and the suction fluid sucked by the ejection of the driving fluid, and discharging the mixed fluid; and a second pipe member having one end connected to the nozzle apparatus, for introducing the driving fluid to the header portion, wherein the first pipe member is disposed through the one end inside a driving fluid passage formed in the second pipe member, and forms an opening portion of the suction fluid passage opened to the outside of the second pipe member; and the driving fluid passage is formed so that the driving fluid flowing toward the one end hi

Abstract: When coils of a vacuum pump unit are excited by energization, a piston equipped with magnets reciprocates in a cylinder. Thus, air is sucked in from an outlet passage of a diffuser of an ejector, and air discharged from the vacuum pump unit is supplied to an inlet of a nozzle of the ejector. Consequently, a fast jet occurs in a throat portion of the nozzle, and a negative pressure of higher degree of vacuum than that of the suction negative pressure of the vacuum pump unit is produced at a vacuum port of the ejector. The negative pressure is supplied from a negative pressure supply port. The ejector can supply a negative pressure of high degree of vacuum while reducing the load on the vacuum pump unit.

Abstract: A novel pressure-exchange ejector is disclosed whereby a high energy primary fluid transports and pressurizes a lower energy secondary fluid through direct fluid-fluid momentum exchange. The pressure-exchange ejector utilizes non-steady flow principles and both supersonic flow and subsonic flow embodiments are disclosed. The invention provides an ejector-compressor/pump which can attain substantially higher adiabatic efficiencies than conventional ejectors while retaining much of the simplicity of construction and the low manufacturing cost of a conventional ejector. Embodiments are shown which are appropriate for gas compression applications such as are found in ejector refrigeration, fuel cell pressurization, water desalinization, and power generation topping cycles, and for liquid pumping applications such as marine jet propulsion and slurry pumping.

Abstract: Disclosed herein is a vacuum ejector pump. The pump is operated by compressed air which is supplied to or discharged from the pump at high speed, thus creating negative pressure in an outer surrounding space. The ejector pump includes a frame having an air inlet pipe, a disc, and an air outlet pipe which are sequentially arranged to be spaced apart from each other. The parts are coupled into a single structure via a spacer. A nozzle is mounted to pass through the center of the disc, and a flexible valve member is mounted to the spacer A nozzle body is accommodated in a cylindrical casing having a hole at a position corresponding to the valve member, and defines a chamber inside the spacer. A locking structure is provided on the casing and the nozzle body so as to prevent the casing, which accommodates the nozzle body, from rotating.

Abstract: An apparatus and method for cooling components associated with turbomachinery by means of one or more venturis placed in the intake flow of air into the compressor with an air inlet upstream of the venturis and an air outlet integral to at least one venturi. The partial vacuum created from the one or more venturis draws air past components that are desired to be cooled.

Abstract: A recirculating liquid jet pump for moving a wide variety of materials is described. The pump is preferably equipped with an intermediate collection reservoir enabling the placement of material to be suctioned into the collection reservoir without bringing together the material to be suctioned with the motive fluid of the liquid jet pump. The collection reservoir may also be connected to a separate container for de-watering solid-liquid mixtures to enable mixture liquid to be separated from the solids without bringing the separated liquid into contact with the motive fluid of the jet pump and without the use of excessive amounts of jet pump motive fluid.

Abstract: A hydraulic jet pump comprising: a nozzle housing; a nozzle member disposed within said nozzle housing and including an inlet aperture communicating through a jet nozzle with a mixing chamber along a power fluid inlet flow path; a deflector member including an axial bore formed partially therethrough from an input aperture at a first end thereof towards a second end thereof, said input aperture communicating with said mixing chamber, said deflector member further including a plurality of radially-disposed deflector outlet ports communicating with said axial bore and disposed at an acute angle with respect to said input aperture to form a flow path having an output flow direction disposed at an acute angle with respect to an input flow direction from said input aperture, said deflector member further including a plurality of axially-aligned vacuum inlet ports formed therethrough from said first end to said second end and in communication with said mixing chamber but not with said deflector outlet ports.

Abstract: A self-compensating, energy saving heat transfer unit to provide an efficient means to transfer energy from steam to water in a central heating system. The steam enters a mixing chamber and creates a negative pressure environment. Water in a backwater pipe, which is at a lower temperature and pressure, is absorbed into the mixing chamber where energy is passed from the steam to the water. The water then leaves the first mixing chamber and enters a second mixing chamber where compensation water is added to make up for the possible loss of water that may occur in the central heating system. The heated water then exits the heat transfer unit and goes back into the central heating system. After being cooled in the central heating system, the water then reenters the heat transfer unit at the backwater pipe and continues the cycle over again.

Abstract: A liquid jet pump for moving a wide variety of material is described. The liquid jet pump is comprised of a nozzle assembly and a target tube, and defines a suction chamber. The nozzle assembly is configured to pull in gas, causing a gas bearing effect wherein a layer of gas surrounds the liquid jet flow exiting the nozzle assembly. The liquid jet passes through the suction chamber with minimal deflection, reducing cavitation and improving mixing as educted materials enter the suction chamber and combine with the liquid jet. The combined material is directed into the target tube, which preferably 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: An ejector includes two or more nozzles arranged in series. A stream of air fed at high velocity through the nozzle is used to create a negative pressure in an outer, surrounding space. The surrounding space is in flow communication with at least one slot located between the nozzles. The nozzles are coupled together and assembled into an integrated nozzle body having at least one flexible valve member integrally arranged within the nozzle body to cover the flow communication with the surrounding space upon reaching a certain, desired pressure difference between the surrounding space and the atmosphere.

Abstract: A hybrid vacuum pump comprising an ejector type compressed air-operated vacuum pump. Such pump comprises a housing having an inlet for compressed air, a second inlet connectable to the enclosure to be evacuated, and a discharge outlet. The incoming compressed air being divided into at least two parallel streams by a multiple-outlet chamber, each stream of compressed air passing through at least two nozzles arranged in series, intermediate chambers between successive nozzles of each parallel stream being provided separately for each stream. Pressure-operated valves being provided to automatically prevent flow of gas being evacuated to some of said nozzles as progress is made in producing the desired vacuum, and thus to increase air flow in the remaining nozzles for the achievement of a high vacuum. The pump being characterized by the use of a single body structure being used to support multiple nozzles having different forms.

Abstract: A device for co-mingling fluids from separate sources comprises a jet pump having high and low pressure fluid inlets, and a main outlet for discharging a mixture of the two fluids. A phase separator, receiving fluid from another source of fluid, has a fluid-rich outlet connected to the high pressure inlet of the jet pump, and a gas-rich outlet connected to the main outlet of the jet pump. Fluids from the gas-rich outlet of the separator are mixed with fluids discharged by the jet pump.

Abstract: A method of and apparatus for momentum exchange of a pressurized fluid including a jet nozzle for discharging a jet of pressurized fluid produced by a pressure pump, a first inlet opening provided downstream of the jet nozzle, an air layer generating pipe, and a momentum exchange tube disposed downstream of the air layer generating pipe. A layer of air, around a highly pressurized fluid released from the jet nozzle, is formed by the air layer generating pipe. The momentum exchange tube is formed of a substantially straight construction and has an inner diameter which is greater than an inner diameter of the air layer generating pipe. An outlet provided at the momentum exchange tube for using, as a lifting elevation, the pressure produced by urging the pressurized fluid against air in the momentum exchange tube.

Abstract: A fluid jet ejector and ejection method wherein a plurality of high velocity jet streams of a primary fluid are discharged through a vacuum chamber into a convergent-divergent diffuser or nozzle to draw a secondary fluid into the chamber in such manner that the secondary fluid is entrained within flow spaces formed between the jet streams and is carried from the chamber through the diffuser means by the jet streams. A modular fluid jet ejector composed of multiple parts which may be economically manufactured and assembled, and a fluid jet ejector assembly consisting of multiple stacked fluid jet ejectors which may be coupled in parallel to provide a high jet pumping rate.

Abstract: An ejector pump for the transport of materials or mixtures of materials capable of flowing with the aid of a fluid driving medium is provided. The ejector pump includes at least one flow management profile which is placed in the flow channel of the ejector pump and which displaces the fluid that is flowing against the profile in a lateral direction component away from the original direction of flow. Therefore, the fluid in the middle of the flow channel makes its way closer to one of the flow channel walls thus limiting the areas of turbulence that occur during the mixing of material that is to be transported with the driving medium.

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: An ejector pump for the transport of materials or mixtures of materials capable of flowing with the aid of a fluid driving medium is provided. The ejector pump includes at least one flow management profile which is placed in the flow channel of the ejector pump and which displaces the fluid that is flowing against the profile in a lateral direction component away from the original direction of flow. Therefore, the fluid in the middle of the flow channel makes its way closer to one of the flow channel walls thus limiting the areas of turbulence that occur during the mixing of material that is to be transported with the driving medium.

Abstract: A multi-stage ejector pump for suction or for moving materials with the help of a working fluid within one housing is provided. The pump is designed for radial flow and includes at least one inlet for the working fluid, at least one inlet for the materials and at least one flow channel for the mixture of working fluid and materials. The pump includes at least one suction chamber per pump stage, each suction chamber being connected to a common antechamber with the intake of the materials at one end and the flow channel on the other. The flow channel is circular in shape and constructed for radially outward directed flow. The wall elements of the flow channel are comprised of ejector rings located concentrically to each other, adjacent ejector rings forming a passage for the materials between each suction chamber and the flow channel.

Abstract: A jet barrel and hose fitting insert are provided for a jet pump that supplies coating powder to a spray gun. The insert reduces the likelihood of impact fusion in the barrel and fitting. The insert comprises a cylindrical portion of small outside diameter in alignment with a cylindrical portion of large outside diameter with a longitudinal bore through both portions. The insert is retained in a hose fitting which fastens into the jet pump. The upstream end of the insert is positioned to receive the jet flow and to close a supplementary air chamber in the pump.

Abstract: An apparatus for generating a stream in a body of water has at least one cylinder installed under water, and a water-jet pump housed in the cylinder. The pump draws water in through one end of the cylinder and produces a stream of water accelerated by a driving fluid supplied from an external source. The stream is discharged through another end of the cylinder to promote a flow in the body of water.

Abstract: A refrigeration system particularly suitable for an automobile air conditioning system is disclosed. The system includes an ejector to raise the pressure of the working fluid to the condenser pressure and a boiler which utilizes waste heat from the automobile engine. The boiler produces a near sonic velocity saturated vapor for input to the primary nozzle of the ejector. The near sonic velocity input maximizes the stagnation temperature and pressure of the fluid entering the primary nozzle for a given low or limited temperature heat source such as automobile waste heat. The refrigeration system uses a working fluid having a property such that its entropy when in a saturated vapor state decreases as pressure decreases, which maximizes the input pressure for a given heat source and prevents the vapor from condensing in the ejector. A high efficiency primary nozzle is also provided, allowing the system to take advantage of the decreasing entropy property of the saturated vapor.

Abstract: A refrigeration system particularly suitable for an automobile air conditioning system is disclosed. The system includes an ejector to raise the pressure of the working fluid to the condenser pressure and a boiler which utilizes waste heat from the automobile engine. The boiler produces a near sonic velocity saturated vapor for input to the primary nozzle of the ejector. The near sonic velocity input maximizes the stagnation temperature and pressure of the fluid entering the primary nozzle for a given low or limited temperature heat source such as automobile waste heat. The refrigeration system uses a working fluid having a property such that its entropy when in a saturated vapor state decreases as pressure decreases, which maximizes the input pressure for a given heat source and prevents the vapor from condensing in the ejector. A high efficiency primary nozzle is also provided, allowing the system to take advantage of the decreasing entropy property of the saturated vapor.

Abstract: An ejector pump having a plurality of longitudinally aligned chambers, each chamber including a pair of opposed end walls, at least two of the end walls having a nozzle and a one-way valve, with a connection to compressed gas to the most upstream of the nozzles, the pump having a single cylindrical pump body defining a cylinder or axially aligned cylinders with multiple end walls inserted therein, each wall having substantially the shape of a cross section through the cylinder or the respective cylinders. The end walls being secured to the cylinder at a point along the length of the cylinder or each end wall attached to the corresponding aligned cylinder.

Abstract: The present invention relates summarily to a mult-ejector device with at least one ejector part (2) including at least one array of ejector jets (18, 19, 20) placed one after the other in the ejector part (2). Under the action of compressed air flowing through them, the jets (18, 19, 20) generate a subpressure in chambers (11, 12) connected to the jets. The chambers (11, 12) are in communication via openings (13, 15, 17) provided with non-return valves (14, 16) with a vacuum collection chamber (9), to which the tool or the like driven by the ejector device is connected. The ejector part (2) is an element in the shape of a plate formed by moulding or in some other way, where the ejector jets (18, 19, 20) and the valve chambers (11, 12) are formed integrally in the plate-like piece.