Abstract: A flow management device comprises an outer chamber with an inlet arranged to receive a flow in a first flow direction and an outlet arranged to provide the flow in a second flow direction different from the first direction, and a duct arranged within the chamber, the duct having a first end configured to receive the flow from the inlet and a second end configured to release the flow towards the outlet, wherein a cross-sectional area of the duct increases towards each of the first and second ends of the duct.

Abstract: A vacuum device for a material handling system includes a vacuum device body and a sealing element. The vacuum device body has a vacuum passageway in which H vacuum is generated in response to activation of a pressurized air supply that forces pressurized air through a venturi device. The sealing element moves to a sealing position to substantially seal the vacuum passageway when the air supply is activated, and is urged toward the sealing position via pressurized air that is diverted from an inlet of the vacuum device to the sealing element. The sealing element moves to substantially vent the vacuum passageway when the air supply is deactivated. The vacuum passageway may be in fluid communication with a vacuum cup, which seals against the object when the sealing element is at the sealing position and the vacuum generating device generates at least a partial vacuum in the vacuum passageway.

Abstract: Reduced noise abrasive blasting assemblies and systems are described. The new assemblies and systems are comprised of standard blast hose, accelerator hose, couplings and nozzle. The improved abrasive blasting system maintains abrasive particle velocity while decreasing the exit gas velocity and consequently decreasing sound production. This is accomplished through an acceleration section with reduced inner diameter and sufficient length to provide the necessary abrasive particle velocity. The new system maintains the productivity and efficiency of conventional abrasive blasting systems but with greatly reduced acoustic noise production and reduces operator fatigue due to the lower weight of the carried portion of the system.

Abstract: An ejector includes a nozzle, a suction chamber, and a diffuser. A diffuser further includes an attachment configured to change the dimensions of the outlet flow path. The attachment changes the length X of a narrowed flow path and the length Y and the inner diameter D of a parallel flow path such that expressions (1) and (2) are satisfied: X=A×D??(1), and Y=B×D??(2).

Abstract: A control device for an internal-combustion engine, includes: an ejector including an exhaust port coupled to an intake passage upstream of a compressor, an intake port coupled to a recirculation passage recirculating intake air from the intake passage downstream of the compressor to the intake passage upstream of the compressor, and a suction port coupled to a first branch passage; a first pressure acquirer obtaining a first pressure that is a pressure upstream of the compressor in the intake passage; a second pressure acquirer obtaining a second pressure that is a pressure downstream of the compressor in the intake passage; and an ejector negative pressure estimator configured to estimate an ejector negative pressure based on an opening period of the purge valve and the second pressure.

Abstract: A variable pressure device to solubilize carbon dioxide (CO2) in a beverage includes: a carbonation tank, a CO2 inlet valve and a venting valve attached to the tank's top part; a discharge valve attached to the tank's bottom part; a booster pump arranged immediately after the discharge valve; a recycling valve arranged immediately after the booster pump, which is connected to a recycling inlet at the top part of the tank; an outlet between the pump and the recycling valve; a level sensor arranged on the lid of the tank; a CO2 diversion valve attached to a tank side near its top part; a modulating valve arranged after the CO2 diversion valve; a Venturi attached immediately after the modulating valve; a control point arranged between the modulating valve and the Venturi; and a beverage inlet valve into the tank attached immediately after the Venturi, which is formed by a pipeline.

Abstract: An unmanned air system and method with blown flaps are presented. Air is guided to a fuel cell carried by the unmanned air system. The fuel cell is ventilated by the guided air such that the air is heated by the fuel cell to provide heated air. The heated air is routed from the fuel cell to one or more high lift devices on a lift device of the unmanned air system to provide routed air. The routed air is blown across the high lift devices.

Abstract: An ejector device adapted to generate a negative pressure with compressed air, which via a compressed-air duct is fed to an ejector, the device including a valve member arranged in the compressed-air duct and controllable in order to, in the open position, allow flow of compressed air to the ejector, an air suction duct arranged between the ejector and a gripping member driven by negative pressure, and a vent valve fluidly arranged with the air suction duct and that, in an open position, places the gripping member in communication with the atmosphere. The valve member embraces: a primary valve arranged in the direction of flow of compressed air; a secondary valve arranged downstream of the primary valve; a flow section of compressed-air duct between the primary and secondary valve, the vent valve communicating with the flow section so that, in the open position of the primary valve, is continuously being subjected to a closing air pressure, independently of the open or closed position of the secondary valve.

Abstract: A downhole jet pump 10 includes an exterior pump housing 12, the jet nozzle 30, and a carrier 40. A diffuser 46 is provided downstream from a mixing tube 32, and preferably forms a unitary body sealed to the pump housing. An inlet valve 100 passes formation fluid to the pump housing.

Abstract: Aspirators for inflating devices such as (but not limited to) aircraft evacuation slides and rafts are detailed. Housings of the aspirators may be made of wound filaments of composite materials, reducing their weight as compared to conventional metal structures. Such actions as reconfiguring and repositioning jet nozzles within the housings also contribute to enhancing performance of the aspirators.

Abstract: There is provided a liquid supply method in which, when preparing a solution that can be used as washing water and the like by supplying a minute amount of chemicals and the like to ultrapure water, the amount of supply solution that is supplied can be accurately determined. In this liquid supply method, a solution is prepared by supplying a supply liquid to a primary fluid that is circulating in a primary fluid circulation tube (2). This liquid supply method uses a liquid supply apparatus (1) that includes: a supply section (3) that delivers the supply liquid; and a supply liquid circulation tube (4) that causes the supply liquid to flow from the supply section (3) to the primary fluid circulation tube (2), the internal diameter of the supply liquid circulation tube (4) being between 0.01 and 1 mm.

Abstract: An exhaust eductor system includes a primary exhaust nozzle configured to transport an active flow stream; and a mixing duct at least partially surrounding the primary exhaust nozzle and configured to transport a passive flow stream that is entrained by mixing with the active flow stream from the primary exhaust nozzle. The mixing duct has an interior, and a baffle on the interior of the mixing duct is configured to prevent the mixed flow streams from exiting the mixing duct.

Abstract: An ejector is provided with a first fluid chamber into which hydrogen gas is introduced; a rod-shaped needle; a nozzle exhausting hydrogen gas introduced into the first fluid chamber from an exhaust port; a second fluid chamber into which hydrogen off-gas is introduced; a diffuser provided at the exhaust port of the nozzle; and a third fluid chamber into which air is introduced. The first fluid chamber is provided between the second fluid chamber and the third fluid chamber. The first diaphragm 65 separates the first fluid chamber and the second fluid chamber and the second diaphragm separates the first chamber and the third fluid chamber. Then, the needle and the nozzle moves to approach each other by the pressure of air introduced into the third fluid chamber and isolate each other by the pressure of hydrogen off-gas introduced into the second fluid chamber.

Abstract: Systems, methods and media for generating fluid flow in an algae cultivation pond are disclosed. Circulation of fluid in the algae cultivation pond is initiated via at least one jet. The circulation of fluid generates a velocity of fluid flow of at least ten centimeters per second in the algae cultivation pond. A head is provided to the at least one jet that overcomes a head loss associated with the velocity of fluid flow of at least ten centimeters per second in the algae cultivation pond.

Abstract: An apparatus for providing vacuum to a material handling device. The apparatus of the present invention provides a housing having an aperture extending therethrough. The aperture has an inlet end for receiving a supply of pressurized air and an outlet end. A valve is slidably disposed within said aperture of said housing for movement between a vacuum position, wherein vacuum is provided to the material handling device through the use of a venturi, and a release position, wherein atmosphere air pressure is provided directly to said material handling device.

Abstract: The present embodiments relate to a pump assembly comprising a pump which in turn comprises a low side and a high side. The pump assembly comprises a first inlet conduit in fluid communication with the low side and the pump assembly is adapted to provide a first operation condition in which first operation condition fluid is transported in the first inlet conduit towards the low side at a first flow rate. The pump assembly is further adapted to provide a second operation condition in which second operation condition fluid is transported in the first inlet conduit towards the low side at a second flow rate, wherein the first flow rate is lower than the second flow rate.

Abstract: A method and apparatus provides for dispensing a liquid concentrate. The source pressure of a liquid diluent is changed by a boost pump (52) to bring the pressure of the diluent to an elevated pressure. The diluent then enters an aspirator assembly (10) wherein the concentrate and diluent are mixed to form a use solution. The dynamic pressure of the diluent entering the aspirator assembly (10) is sufficient so that the amount of concentrate delivered over time is more constant.

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: 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 vacuum producing device having an ejector means with a jet nozzle and a receiving nozzle downstream from it. At the outlet end of the receiving nozzle there is a receiving space for the fluid flowing through the receiving nozzle and an exit flow duct extends from it. The exit flow duct is provided with choke means for resetting or variably setting the fluid volumetric flow, leaving by way of the exit flow duct, in order to be able to affect the pressure obtaining in the receiving space.

Abstract: A fluid ejector head, includes a fluid ejector body adapted to be inserted into an opening of an enclosing medium having an interior surface, and at least one nozzle disposed on the fluid ejector body. The fluid ejector head further includes, a fluid ejector actuator in fluid communication with the at least one nozzle, wherein activation of the fluid ejector actuator ejects a fluid through the at least one nozzle at controlled locations onto the interior surface of the enclosing medium.

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 vacuum producing means having a housing (2) with an inlet connection (4) and a suction connection (6) arranged opposite to same. The housing (2) comprises a suction nozzle means (16) and a gage pressure pulse means (35) arranged alongside same with the same alignment, for producing a fluid gage pressure pulse to be delivered into the suction space. The gage pressure pulse means (35) comprises a switching valve (35) combined with a pressure plenum (37), the valve member of the switching valve being so driven in a manner dependent of the differential thereat that the pressure plenum is either connected fluidwise with the inlet connection (4) or with the suction connection (6).

Abstract: A vacuum generating device, fabricated in the form of an ejector pump stack and used for generating negative pressure in an absorption unit, such as an absorption pad of a vacuum feeding system, is disclosed. The vacuum generating device includes a plurality of ejector pump modules that share the same shape and construction and are closely arranged in a casing to be stacked side by side while being brought into contact with each other. The casing holds the ejector pump modules in place inside the vacuum generating device. A vacuum-off unit, used for releasing vacuum pressure from vacuum chambers of the ejector pump modules, is mounted onto the casing. The vacuum generating device also includes a vacuum-on solenoid valve connected to a first air inlet port of the casing, and a vacuum-off solenoid valve connected to a second air inlet port of the vacuum-off unit.

Abstract: The invention relates to a vacuum generator (1) of the type comprising at least one nozzle (2) and a compressed air mixer (3) communicating with a vacuum chamber (4).

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 multi-stage ejector pump having an ejector nozzle system with the nozzles situated coaxially behind each other and axially set apart from each other by a spaced distance. The ejector a nozzle system is made up of a set of individual nozzles and nozzle spacers. The ejector nozzle system can be sealingly pushed into a nozzle-receiving shaft of a housing element. The housing wall is interrupted in the area between adjacent nozzles to provide a fluid connection to suction chambers. Each individual nozzle is provided with support elements on its outer periphery. The support elements are axially set apart and provide tilt-free or low-tilt support in relation to the wall of the nozzle-receiving shaft. The aim of the invention is to provide a multi-stage ejector pump which has compact construction, interchangeable nozzles and a high degree of efficiency.

Abstract: A jet pump has a jet nozzle that discharges an operating fluid, a chamber into which a transfer fluid flows and which encloses the end of the jet nozzle, a throat pipe having a constriction portion and a jet nozzle through which the transfer fluid that flows into the chamber is discharged. The discharge end of the throat pipe has a smaller diameter than the base end, and is bent at an angle of approximately 90 degrees from the base end.

Abstract: A vacuum generating device, fabricated in the form of an ejector pump stack and used for generating negative pressure in an absorption unit, such as an absorption pad of a vacuum feeding system, is disclosed. The vacuum generating device includes a plurality of ejector pump modules that share the same shape and construction and are closely arranged in a casing to be stacked side by side while being brought into contact with each other. The casing holds the ejector pump modules in place inside the vacuum generating device. A vacuum-off unit, used for releasing vacuum pressure from vacuum chambers of the ejector pump modules, is mounted onto the casing. The vacuum generating device also includes a vacuum-on solenoid valve connected to a first air inlet port of the casing, and a vacuum-off solenoid valve connected to a second air inlet port of the vacuum-off unit.

Abstract: A vacuum generating device designed to generate negative pressure in an absorption means, such as an absorption pad, of a vacuum system, is disclosed. The vacuum generating device accomplishes the recent trend of compactness and smallness of such devices, effectively protects its ejector unit from damage, and does not have an increased production cost in comparison with conventional vacuum generating devices. The vacuum generating device includes a block body having an air inlet port, a vacuum port, and an air outlet port, an ejector unit functioning to generate negative pressure in response to an action of compressed air flowing thereto via the air inlet port, and a control valve mechanism functioning to open or close air supply paths branching from a main flow path to an air inlet chamber of the ejector unit and the vacuum port. The block body has a recess, formed by depressing a surface of the block body to a predetermined depth.

Abstract: The present invention relates to a jet pump, in particular for transferring fuel in a motor vehicle fuel tank, the pump being characterized by the fact that it comprises a main nozzle (20) and a core (30) mounted to move relative to the outlet bore of the main nozzle (20) and downstream therefrom.

Abstract: A sucking jet pump has a tubular casing 1, in which two flow channels 10, 24 are formed. The first flow channel 10 is the sucking jet pump and the second flow channel 24 is a bypass. The first flow channel 10 is formed by a tube 9 which is integrally formed in one piece onto an air branching piece 8. The tube 9 is in air flow connection with the second air supply nipple 14 via a lateral orifice 13. The two flow channels 10, 24 are flow-uncoupled from the first air supply nipple 6 in one direction by means of a nonreturn valve 26, the second flow channel 24 which forms the bypass being additionally closed relative to the air branching piece 8 by means of a second nonreturn valve 25.

Abstract: A pressure/vacuum generator is established by coupling the pressure port of a vacuum generator to an air pressure source while coupling a valve in fluid communication with the exhaust port of the vacuum generator. When the valve is in a normally open condition (i.e, the exhaust vented to atmosphere), the vacuum port of the pressure/vacuum generator generates a vacuum. When the valve is closed, thereby closing off the exhaust port, the vacuum port becomes a pressure port. Thus, this pressure/vacuum generator can be used in any number of fluid (liquid and gas) systems (e.g., fluid recovery system, fluid transfer system, etc.)that require both a pressure source and a vacuum source while using a minimum number of components.

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 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 suction pulsator (1) used to periodically generate a vacuum in a container connected to it, especially in a collection container for mother's milk, which is provided with a suction funnel. A central nozzle hole (25) of a nozzle body (20) is provided, wherein a compressed air flow flows through the nozzle hole (25) and the nozzle body (20) is concentrically surrounded by a ring-shaped suction gap (35), wherein the nozzle (25) opens into a narrow, radial outlet gap (36), which is formed between a radial deflecting surface (40), which guides the compressed air flow over the suction gap (35), and annular surfaces (29, 30) of the nozzle body (20) and of a nozzle jacket (13), which concentrically surround the nozzle hole (25) and the suction gap (35). The suction gap (35) opening openly into the outlet gap (36) is in connection with a suction line (39), which can be connected to the collection container through a connection opening (38), which is arranged away from the outlet gap (36).

Abstract: An improved vacuum apparatus and method is provided which includes a vacuum body, pump or ejector which produces a plurality of high velocity liquid jet streams of a primary fluid (liquid) such as water discharged into a convergent diffuser to draw a secondary fluid (gas) such as air into a vacuum chamber. The secondary fluid (gas) is entrained within flow spaces formed between the liquid jet streams and is carried through the diffuser by the jet streams. A secondary fluid inlet is operatively connected to an elongate hose which serves as a vacuum line for evacuating, for example, a Mason Jar, a plastic bag, other food storage container, an oil storage or receiving receptacle, or the like. The present invention is especially adapted for use as or in a vacuum seal kit or oil change kit, but not limited thereto.

Abstract: A jet pump includes a sucking jet pump with a flow duct having a decreasing cross section and a suction pipe insert which is inserted therein, a bypass arrangement and a valve arrangement, which form a construction unit, where the sucking jet pump has a nozzle insert which is inserted in a duct, which forms the flow duct with decreasing cross section.

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 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 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: An apparatus for vacuum absorption is provided which is quiet and simplified with maintaining an absorption power. The apparatus comprises: a tank for accumulating circulating water; a waterway for circulating the circulating water by a pump disposed at an absorption inlet side of the waterway and having an outlet disposed over the water surface of the circulating water in the tank; an aspirator disposed on the waterway; and a reverse flow prevention mechanism surrounding the outlet, having a small hole of the size to drain less volume of water than the volume flowing out of the outlet at the position sunk under the water, and comprising a buffer (hollow body) with drain windows at the position over the water surface. The apparatus serves to drain the circulating water into the water during the operation of the pump and to absorb air from the outlet into the vacuum vessel during the stoppage of the pump.

Abstract: An interior air temperature sensing system is provided for use with a vehicle interior compartment air temperature regulating system including an ambient air inlet duct, a blower housing connected to an air inlet duct and an air temperature modifier and a blower situated within the blower housing. The blower draws air from the air inlet duct under negative pressure and conveys the air at positive pressure past the air temperature modifier to the interior compartment. The air temperature sensing system includes an air temperature sensor and a venturi valve coupled to the negative pressure area of the blower. The valve includes an inlet port, and outlet port and a venturi section extending therebetween defining a point of minimum flow area, or valve seat.

Abstract: In an aspirator (10) for pumping air into an inflatable (16), initial delivery of an aspirating fluid extends a piston (68) and the piston (68) extends an aspirator tube (24) to open an ambient air inlet (30) and render the aspirator (10) operable. Aspirating fluid pressure acts on a valve plug (112) and moves it into a first position in which the aspirating fluid pressure is connected to the linear fluid motor (66) for extending the piston (68). When inflation is substantially completed, back pressure from the inflatable (16) acts on a movable wall (74) which is connected to the valve plug (112) to produce a force which overrides the force of the aspirating fluid pressure acting on the valve plug (112). The overriding force moves the valve plug (112) into a second position in which flow of aspirating fluid into the linear motor (66) is blocked and the piston (68) is vented. A spring (48) then retracts the aspirator tube (24 ) closing the ambient air inlet (30), and disabling the aspirator (10).

Abstract: An air pump for inflating an inflatable article includes a multi-stage centrifugal compressing section for inhaling and compressing primary air and a secondary air inhaling mechanism provided downstream of the multi-stage centrifugal compressing section. At the beginning of the inflation operation, extra secondary air can be rapidly inhaled into the air pump and delivered into the inflatable article mainly by means of the secondary air inhaling mechanism and thereafter, when the inner pressure of the inflatable article gradually increases to exceed the predetermined level, the secondary air inhaling mechanism may be closed so that only the multi-stage centrifugal compressing section for primary air functions to continue the subsequent inflation operation in a higher pressure range. Thus, an ideal and speedy inflation operation may be achieved without reducing the inflation pressure.

Abstract: A jet pump for the suction and/or conveyance of flowable materials or mixtures of materials by means of a liquid or gaseous propellant medium consists of a housing with inlets (28, 64) as well as a common outlet or discharge (30). A flow passage (44) in the housing forms at least one propellant nozzle and at least one diffuser, to which is attached at least one suction chamber (50-56) behind the propellant nozzle (34) for the material to be conveyed. The flow passage (44) has rectangular cross section and is limited by symmetrical side limiting surfaces on separate housing walls (10, 12), between which wall elements (18, 20, 22), consisting of profile members, determine the sectional contours and dimensions for all of the lengthwise segments through the inside of the housing parallel to the plane of symmetry. A simple manufacture with use of a small number of basic parts is thus obtained, which provides for an adaptation to different capacities as well as different propellant mediums and conveyed materials.

Abstract: A fluid injector consisting of an airfoil cross-sectioned rectangular plate mounted on and perpendicular to a pivoted hollow tube and suspended within a flowing stream of fluid into which another or the same type of fluid is to be injected through the tubular support exiting out the top surface of the plate and mixing with the primary fluid by means of vortices created at the rear side edges of the wing shaped plate. The quantity of injected fluid is controlled by the angle the plate is set in reference to the direction of flow of the primary fluid.

Abstract: Air-operated vacuum pump assemblies are disclosed which provide a maximum vacuum force and a large vacuum flow per volume of air consumption. The present venturi pump assemblies comprise one or more solid ejector housings each having a single longitudinal bore comprising two or more linear exit passage sections, each said passage section being larger than and spaced from the passage section exhausting thereinto. Vacuum chambers between the exit passage sections each communicate with a surface of the pump housing through transverse bores, to a common vacuum manifold through which vacuum flow can be drawn through each of the vacuum chambers of the linear exit passage sections for exhaust through the final downstream exit passage section.

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: 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