Abstract: A dry disconnect coupling connects the transfer hose from a fuel oil storage tank and the fill pipe of a tanker truck to form a continuous flow path between the storage tank and the tanker truck. The coupling includes an adapter, a coupler, and means for returning fuel residue to the flow path or to an external reservoir. The adapter is attached to the fill pipe of the tanker truck on one end and to the coupler on the other end. The free end of the coupler is attached to the transfer hose from the storage tank. The adapter and the coupler each define a flow passageway therethrough which is sealed by a poppet valve having an end face. The fuel returning means includes a reservoir for collecting fuel residue that accumulates on the end faces of the adapter and the coupler during transfer operations. In a preferred embodiment, the returning means includes a venturi vacuum for suctioning the fuel residue out of the reservoir and into the flow passageway defined by the coupler.

Abstract: A dual mode water circulation apparatus for installation in a water supply line in a building upstream of a water heater provides continuously heated water at one or more remote hot water faucets. The apparatus is connected in a water return loop that includes a portion of the water supply line that is downstream of the apparatus, the water heater, the common hot water pipe, and a return line from a remote faucet. The apparatus includes a housing having a first inlet for connection to the water return line, an outlet for connection to that portion of the water supply line that connects to the water heater, and a second inlet for connection to the water supply line. There is a chamber in the housing with the inlets and outlet connecting to the chamber. There is a check valve between the first inlet and the chamber preventing flow from the apparatus outwardly from the first inlet.

Abstract: A pressure balancing foam valve includes a body having a liquid inlet at one end and a liquid outlet at an opposite end, and having an annular passage therethrough. A first stage pressure regulating assembly is disposed within the annular passage of the valve and includes a shaft that is attached at a first end to the liquid inlet. A one-piece pressure disc is slidably disposed on the shaft. The disc is urged into a seated position against an end portion of the liquid inlet by a spring interposed between the pressure disc and a second end of the shaft. The spring is selected so that the pressure disc is placed into the seated position during low pressure conditions to prevent liquid flow through the valve, and to permit compression by force of the disc from increasing liquid pressure to unseat the disc and permit liquid flow through the valve. A second stage pressure regulator is a venturi-shaped annular passage through a wall portion of the liquid outlet.

Abstract: A vacuum sewer system comprises a liquid-driven ejector, the working medium of which is fed to the ejector by a circulation pump from a sewage collecting container, the suction side of the ejector being connected via a check valve to a vacuum sewer network. Air and sewage delivered through the sewer network flow through the ejector into the collecting container. The bore of the discharge pipe of the ejector is substantially cylindrical throughout. Its length is 8 to 20, preferably 10 to 15, times the diameter of its bore and the pipe discharges directly into the open interior of the collecting container.

Abstract: A water circulation apparatus to provide instant hot water to faucets remote from the heater in residential and small commercial buildings when water is periodically used in the building. The apparatus comprises a body containing an aspirator and a check valve, and provisions for installation in the water supply line to the heater and cold water faucets. It uses a small water return line from a tee installed in the hot water pipe near the remote faucet, to a connector on the water circulation unit, thereby establishing a circulation loop from the water heater, through the hot water pipe, the tee and return line, and through the water circulation unit back to the heater. The aspirator is a tapered bore in the body with a concentric nozzle positioned in the large end, and a low pressure tap located in the vicinity of the nozzle outlet. The check valve uses a neutrally buoyant poppet to minimize friction.

Abstract: A device and method, especially adapted for operating sprinklers, shower heads etc. at low flow, converts low continuous liquid flow to a high intermittent and pulsating flow. The liquid is introduced at a controlled low rate of flow, such as by the use of a pressure-compensated dripper in a liquid supply line. The liquid then flows into a chamber which is somewhat expandable in volume. The pressure increases in the chamber while outflow of the liquid is restricted until pressure created by introduction of the liquid is sufficient to eject the fluid intermittently at a higher flow. This is achieved by utilizing a pressure-responsive valve in the liquid exit of the container. The valve has a preset pressure response designed for quick response to create a water hammer effect. The valve has openings which create a pumping effect to admix air or another liquid with the effluent stream.

Abstract: A chemical injector valve connected to a source of water under pressure harnesses the venturi effect to entrain liquid chemicals into a water stream and employs a variable size pressure chamber to ensure that the flow rate and quantity of chemicals entrained remains constant even when the pressure of water entering the valve varies widely. An increase in incoming water pressure causes expansion of the variable size pressure chamber and a decrease in incoming water pressure causes contraction of the variable size pressure chamber. A slidably mounted piston is biased toward the variable size pressure chamber so that the size of the pressure chamber does not increase unless the accumulation of water in the chamber exceeds the bias acting on the piston. When the bias is exceeded, a shank of the piston moves toward a piston stop and the flow of water into the valve is throttled.

Abstract: A dual mode water circulation apparatus to provide instantaneous hot water to faucets remote from the heater in residential or small commercial building water systems. The apparatus comprises a cold water heat exchanger, a high sensitivity check valve, and an aspirator incorporated into a single unit.The heat exchanger is a chamber installed in the cold water supply line, containing a cooling tube exposed to the water. The check valve has a neutral buoyancy poppet and closes against an angular seat. The aspirator has a reduced cross section nozzle inside a tapered chamber connected to the water supply pipe, with a low pressure tap in the chamber bore.The apparatus is installed at an angle to the horizontal. The cooling tube is connected to a water return line from a tee in the hot water pipe at the remote faucet. The water circulation loop is from the remote hot water faucet to the heat exchanger portion of the apparatus, to the check valve, then to the aspirator and into the cold water supply to the heater.

Abstract: The method of removing hot liquid coolant from an internal combustion engine cooling system, which includes a radiator having a by-pass outlet, the method including applying suction to the by-pass outlet to draw a by-pass stream of hot fluid, including hot pressurized gas, from the radiator, thereby to reduce fluid pressure in the radiator; and then opening the radiator for safely removing hot liquid coolant therefrom; The removed liquid may be disposed of or treated in a zone or zones outside the cooling system; and returning the treated coolant liquid may then be returned to the cooling system.

Abstract: An apparatus for metering an accurate flow of a first fluid, at a low pressure and a low flow rate, into a conduit conducting a flow of a second fluid, at a much higher pressure and much greater flow rate, comprises a pressure reducer containing a nozzle and a peristaltic pump connected in fluid communication with the pressure reducer. The pressure reducer is connected in the conduit and the nozzle of the pressure reducer increases the flow rate of the second fluid flowing through the pressure reducer, thereby correspondingly reducing the pressure of the second fluid in the pressure reducer. The peristaltic pump supplies the first fluid to an area of the bore through the pressure reducer where the nozzle has decreased the pressure of the second fluid channeled through the pressure reducer. A pressure relief valve communicates with the pressure reducer to prevent the pressure of the second fluid from decreasing below a third fluid pressure.

Abstract: A check valve which is positioned in the vacuum air line of an internal combustion engine. The check valve includes a single-piece valve body having an outlet port and two or more inlet ports, with one outlet port located substantially in line with the inlet port and connected by a venturi tube. The second inlet port is separated from the main air flow line by the valve stem and a diaphragm which allows communication there between and prevents back pressure. The second inlet port communicates with the outlet port through the valve stem and a second venturi tube which provides a vacuum boost to a device, usually vehicle brakes, connected to the inlet.

Abstract: Apparatus for diverting backflow includes a housing having first and second pressure openings for receiving fluid signals representative of first and second pressures. The housing has a gas inlet and a gas outlet and is formed with a gas transmission passage for carrying gas from the gas inlet to the gas outlet. The housing has a vent passage communicating with the gas passage and the region outside the vent passage for carrying fluid from the gas passage to the region outside said housing. Valve structure movable in the housing is responsive to the difference in pressures at the first and second pressure openings for blocking fluid flow between the gas passage and the vent passage when the pressure difference is greater than a predetermined value and allowing fluid flow from the gas passage to the vent passage when the pressure difference is below a predetermined value.

Abstract: A water control apparatus having a main valve, a main valve control, and a step-wise valve. A moisture sensor is connected to the valve control. In response to the moisture sensor, the valve control opens or closes the main valve. When the main valve opens, sufficient water pressure must be present for the step-wise valve to open. When said step-wise valve opens, water flows through it and to a water distribution device that makes the moisture sensor moist. When the moisture sensor is sufficiently moist, the valve control turns the main valve off. With the main valve off, the lack of water pressure closes the step-wise valve. The step-wise valve opens at a higher water pressure threshold and closes at a lower water pressure threshold. The decrease in pressure arising from the opening of the step-wise valve is insufficient to close it. The water control apparatus is powered by water flow and is otherwise self-sufficient.

Abstract: A system for controllably metering a first liquid with a second liquid includes a venturi injector unit and a peristaltic pump. A source of pressurized first liquid is coupled to the input port on the venturi injector unit, while the peristaltic pump couples metered amounts of the second liquid to the injection port on the venturi injector unit. The throughflow of the first liquid within the venturi injector unit creates a reduced pressure that draws in the metered amounts of the second liquid provided at the injection port. The desired mixture of the first and second liquids is provided at the output port of the venturi unit. In addition to providing a metered output mixture, the use of a peristaltic pump further allows the second liquid to include a chemical that might degrade the performance of a conventional pump. The preferred embodiment discloses a dishwashing system wherein the first liquid is water and the second liquid is a chemical such as a detergent or a wetting agent.

Abstract: This invention includes a process and apparatus for dispensing/applying a material to lawns and gardens. The apparatus includes a child and pet proof container for holding the material being dispensed/applied. At the upper portion of the container in a water flow path is a water fill conduit, liquid volume control, back flow prevention device, and a Venturi. The Venturi draws the contents of the container through a hose having an end located at the containers lower end where there is a filter located at such hose end. This allows hazardous material to be administered to a lawn or other flora without human or animal exposure to hazardous material.

Abstract: Disclosed is a dynamic, non-recycling pumping system for combining at least one chemical agent with a liquid carrier to produce a mixture for spraying on a target. Included in the subject device is a pump having an adjustable pressurized output line and an adjustable vacuum containing primary suction input line. A carrier reservoir supplies the primary suction line with the carrier that is mixed with a variable amount of chemical agent added through a secondary suction line connected to the primary suction line.

Abstract: A negative pressure flow regulation and automatic purge method which provides an improved ozone delivery system for use with ozone generators using venturi devices or other negative-pressure ozone injection schemes, such as in ozone water purification systems. The system comprises four components in a particular arrangement: a first check valve and a needle valve or orifice in the ozone line immediately following the ozone generator, a second check valve at or near the venturi end of the ozone line, and a vacuum reservoir volume consisting of the combined volume of a vacuum bottle and the length of ozone line between the needle valve and the second check valve. The system maintains a near-ambient pressure in the ozone generator during operation, and after shutdown it provides an automatic purge of the ozone generator, prevents back-diffusion of ozone into the gas supply line and firmly seats the safety check valve in the ozone delivery line.

Abstract: This invention includes a process and apparatus for dispensing/applying a material to lawns and gardens. The apparatus includes a child and pet proof container for holding the material being dispensed/applied. At the upper portion of the container in a water flow path is a water fill conduit, liquid volume control, back flow prevention device, and a Venturi. The Venturi draws the contents of the container through a hose having an end located at the containers lower end where there is a filter located at such hose end. This allows hazardous material to be administered to a lawn or other flora without human or animal exposure to hazardous material.

Abstract: A mixing valve is provided for mixing together two liquids in varying proportions and has the capability of being joined in series to other mixing valves, each of which, other than the first of the series, receives water from its adjacent valve.

Abstract: A high volume, low pressure air system for atomizing a fluid, such as paint, includes, among other things, a variable jet venturi induction pump which generates low pressure air for powering one or more atomizing devices, such as spray guns, with the intake of the induction pump being located a predetermined distance away from the atomizing devices so that overspray produced thereby is prevented from being fed along with ambient air into the induction pump. The system also controls the supply of compressed air and can be equipped with a compressed air driven intake fan for turbo charging the ambient air fed to the jet venturi induction pump. A booster source of regulated low pressure air is also coupled to the feedline(s) coupled to the individual atomizing devices to augment the low pressure air generated by the jet venturi induction pump for certain spraying tasks.

Abstract: A high volume, low pressure air system for atomizing a fluid, such as paint, includes, among other things, a variable jet venturi induction pump located within a sealed low pressure air tank for holding a relatively large volume of low pressure air generated by the induction pump which is coupled to a source of compressed air as well as ambient air and having a plurality of outlets which are adapted to be coupled to and feed low pressure air for powering a respective plurality of individual atomizing devices, such as spray guns, with the air tank being located a predetermined distance away from the atomizing devices so that overspray produced thereby is prevented from being fed along with the ambient air into the induction pump. The system also controls the supply of compressed air and can be equipped with a compressed air driven intake fan for turbo charging the ambient air fed to the jet venturi induction pump.

Abstract: A method and apparatus for delivering disinfectant in a liquid form to a well of a water system is disclosed including a venturi having a suction side in fluid communication with a source of disinfectant such as chlorine. A flow of water is provided through the venturi between the pressurized side of the water system and the well when a pump is drawing water from the well and delivering the water to the pressurized side of the water system. Specifically, a solenoid valve is provided in the lines between the pressurized side of the water system and the venturi and is electrically controlled by the pressure switch which also controls the pump. In the preferred form, a timer is provided electrically intermediate the solenoid valve and the pressure switch to allow water flow through the solenoid valve only during selected times of pump actuation to allow adjustment of the rate at which the disinfectant is delivered.

Abstract: A high volume, low pressure air system for atomizing a fluid, such as paint, includes, among other things, a variable jet venturi induction pump located within a sealed low pressure air tank for holding a relatively large volume of low pressure air generated by the induction pump which is coupled to a source of compressed air as well as ambient air and having a plurality of outlets which are adapted to be coupled to and feed low pressure air for powering a respective plurality of individual atomizing devices, such as spray guns, with the air tank being located a predetermined distance away from the atomizing devices so that overspray produced thereby is prevented from being fed along with the ambient air into the induction pump. The system also controls the supply of compressed air and can be equipped with a compressed air driven intake fan for turbo charging the ambient air fed to the jet venturi induction pump.

Abstract: This invention relates to a device and method for converting low continuous liquid flow to a high intermittent and pulsating flow. They are especially adapted for operating sprinklers, shower heads and venturi pumps at low flow. Applicant has accomplished these objectives by introducing liquid at a controlled low rate of flow such as by the use of pressure compensating drippers in a liquid supply line, thence into a chamber which is somewhat expansible in volume and increasing pressure therein while restricting the outflow of the liquid until pressure created by introduction of such liquid is sufficient to eject the liquid intermittently at a higher flow and over a greater area. This is achieved by utilizing a pressure responsive check valve in the liquid exit and more particularly by utilizing a check valve designed for quick response to create a water hammer effect.

Abstract: An overflow and automatic start-up system adapted for use with hydrokinetic amplifiers is disclosed. More particularly, the present invention relates to an overflow check system adapted to provide unit suspension and restart solely by manipulation of a discharge valve at a remote user location.

Abstract: A system for automatically feeding a chemical liquid to a cooling tower includes a water reservoir for storing water circulating through the cooling tower, a water feeding pipe extending into said water reservoir, a float valve provided in a passage of said water-feeding pipe, which is actuated in response to a variation in a water level in said water reservoir to open or close said passage, a means for increasing the flow rate of water flowing through said passage to inject water from a discharge port at the time when said float valve opens, a negative pressure generating chamber located in said passage and defined by said injection of water and a chemical liquid pipe in communication with said negative pressure generating chamber. A chemical liquid in the chemical liquid pipe is injected with water from the discharge port through the negative pressure generating chamber under the action of a negative pressure generated therein.

Abstract: Gas flow control apparatus for controlling the flow of a process gas through a conduit system to a process site, for halting the flow of gas when the process is completed, and for then developing a partial vacuum in the conduit system sufficiently high to reduce the concentration of process gas and maintain it in a gaseous state. The partial vacuum is developed by carrier gas flowing through a venturi in communication with the conduit system supplying the process gas. The carrier gas also expels any remnants of the process gas from all points between the venturi and the process site. Further, the system can be used for vaporizing gases from liquids for use in an atmospheric process at the process site, the carrier gas flowing through the venturi and vaporizing a liquid in a chamber upstream of the venturi. The vaporized gases can then be regulated by a mass flow controller.

Abstract: Sludge or slurry is dewatered by passing it on a screw conveyor through a sealed vessel at a vacuum more negative than -10 inches of Hg.As a result, moisture is removed from the sludge or slurry as water vapor. The vessel is sealed from air by the presence of the sludge or slurry at the inlet and outlet port extents of the vessel.

Abstract: An ejector in the fuel tank for transferring liquid fuel from the fuel tank to a fuel chamber in the fuel tank. The ejector comprises a housing with an inlet opening from the fuel tank laterally into the housing. An inlet channel for surplus engine fuel communicates into the ejector housing through a nozzle orifice outlet. An evacuation channel from the ejector housing has an inlet that is aligned with the nozzle orifice. The conicity of the ejector housing and of the inlet channel in the vicinity of the nozzle orifice is disclosed. The evacuation channel has an outlet that extends essentially tangentially into the free space inside the fuel chamber around the outside of a fuel pump therein.

Abstract: A vacuum venturi device including a bypass valve responsive to an increase in inlet pressure to divert pressurized gas to the low pressure port of the device to effect fast vacuum cut off and blow off.

Abstract: A dispenser for producing and dispensing beverages mixed of fruit syrup or oncentrate and water which has associated therewith a water jet injection device. The fruit syrup or the concentrate is provided in a refillable and/or removable and insertible storage vessel provided with a sliding bushing or a clamping device with the aid of which the water jet injection device can be brought into sealing communication with the storage vessel, with the necessary connections with the interior of the storage vessel and a pressurized water conduit, respectively, being simultaneously and automatically guaranteed in response to the movement.

Abstract: Double valve apparatus is used in a swimming pool chlorinating system for injecting chlorine gas into a swimming pool when a swimming pool pump is operating. Two valve elements move on and off two valve seats for preventing air from bleeding back to the water pump when the pump is not operating and for preventing back pressure in the system from introducing water into the chlorine gas line.

Abstract: A water jet injection device for use with mixed beverage dispensing machi is provided, wherein a bushing-type sealing element which fulfills several functions is placed in the injector housing. In particular, the sealing element sealingly separates the mixing chamber from the rearward section of the injector housing in a reliable manner and further acts as a nonreturn valve hermetically sealing the mixing chamber against the supply conduit for fruit syrup or concentrate when the injector in the mixing chamber is inoperative and, at the same time, the sealing element provides a seal when an intake conduit or the like is connected with the lateral intake opening of the injector housing.

Abstract: In a water jet injection device for use with dispensers for producing and spensing beverages mixed of fruit syrup or concentrate there is provided a simple rinsing system which, if need arises, disturbs the water jet of the injection device with the aid of a rod-type member adjustable from outside in such a manner that in the mixing chamber an excess pressure and turbulent flow are generated in place of a vacuum, whereby the mixing chamber is separated from the supply conduit for fruit syrup or the like and an intensive cleaning of all of the parts of the injection device contacting the mixed beverage is effected with the aid of the water of the water jet.

Abstract: In a vehicle fuel tank, a fuel handling apparatus including a fuel pump supported by a fuel delivery conduit, a fuel return conduit and an elongated fuel collector. The collector is pivoted with respect to the pump and the fuel return conduit between a compact installation position to an expanded installed position. In addition to the return flow of fuel into the collector, additional fuel is drawn into the collector by an aspirating action produced by a rapidly flowing stream of return fuel from the end of the fuel return conduit which has a hood thereabout configured to produce the aspirator effect.

Abstract: An apparatus for mixing fluids in accurate predetermined quantities has a feed line for a first fluid (water) under pressure, a suction line for a second fluid (disinfectant) which is to be mixed to the first fluid, and an injector in the form of a fluid jet pump, to which, on the intake side, the feed line is connected. A magnetic valve is positioned in the first fluid feed line. To maintain a precise dosing and to prevent a backflow of the mixture, the feed line is connected to a pressure equalizing container, the fluid level of which is regulated by a fluid pressure switch which controls the magnetic valve. An outlet line from the pressure equalizing container communicates with the inlet of the injector through an air gap.

Abstract: An automatic aspirator-transfer valve is disclosed which controls the delivery of washing and rinsing fluid from a supply to a cleaning gun. The device includes a valving piston which moves between a first or rinsing position to open communications to the bypass conduits and a second or washing position to close the bypass conduit. The injector aspirates washing fluid from a reservoir through a non-return valve, a side inlet and conduit of the side inlet, the side inlet conduit being separated from a passage within the housing bore. By this novel aspect, a user may change from the washing mode to the rinsing mode without the aspiration of dangerously high concentrations of washing agent and without unnecessary waste of the washing agent during operation.

Abstract: A pressure equalizing valve comprises a valve body with a longitudinally disposed bore therein, and a spool disposed in the bore for longitudinal movement to regulate fluid communication from an inlet port to outlet ports in response to a pressure differential between first and second sense ports disposed on first and second end faces of the valve body.

Abstract: Apparatus and a method is provided for delivering a fuel additive to fuel flowing through a pump from an upstream side to a discharge side thereof for delivery to a dispenser with fuel flow through the pump and dispenser being controlled by a dispensing valve. The apparatus comprises a flow sensitive valve positioned upstream of said pump within the fuel flow and being arranged to open in response to fuel flow and close in response to absence of said fuel flow, conduit means in liquid flow communication with the discharge side of said pump to feed back fuel through said valve to fuel at said upstream side of said pump, and means disposed in said conduit means and responsive to the feedback flow of fuel through said conduit means for discharging fuel additive into said conduit for delivery through said flow sensitive valve into said fuel flow on the upstream side of said pump.

Abstract: The invention relates to a method and a device for producing and dispensing extinguishing fluids mixed with adjuvants. The adjuvants are drawn in by suction in a metered manner and fed to a suction or intake pipe of an extinguishing fluid pump. A partial volume of the extinguishing fluid proportional to the quantity of extinguishing fluid conveyed in the delivery pipe is withdrawn from the delivery pipe. A negative pressure is generated thereby, by means of which the adjuvant is drawn in by suction and mixed with the extinguishing fluid. The extinguishing fluid mixed with additive is then fed to the suction or intake pipe of the extinguishing fluid pump.

Abstract: A process for performing a series of hydrodynamic functions or operation on a flow of fluids comprised of at least two phases includes the following steps: separating the fluid phases that comprise the initial flow; reducing the turbulence of the flows of each of the fluid phases which have been separated from each other; and recombining the fluid phases to form a new polyphasic flow with a predetermined structure.

Abstract: A blower unit, designed for use for example with air-conditioning plant, has an outer housing with a first aspiration or inlet connection forming part of an aspiration duct for a primary volume flow, and a second aspiration connection forming part of an aspiration duct for a secondary volume flow. The outer housing furthermore has outlet or pressure connections joined up with the primary and with the secondary circuits for the supply of air thereto. In the housing two blower impellers are placed and the outer part of the housing has an adjustable distributor unit which may be moved into different positions of adjustment so that the volume flows incoming at the outlet side of the blower impellers may be directed by different adjustments to the pressure (or outlet) connections as may be desired. The outer housing has two separate spaces in which the two blower impellers are placed which are fixed in an axial direction. Each such blower impeller has an air guiding housing.

Abstract: A fluid operated pressure oscillation generator having an additional inlet passage to permit removal of a cover.

Abstract: Pressure cleaning apparatus (10) comprising a pair of liquid containers at substantially the same level, including a water container (11) and a detergent container (12), a positive displacement pump (14) located below said liquid containers and having an inlet and an outlet, and an aspirator mixer (13) for supplying a mixture of water and detergent to the pump, comprising an outer tube (60) having first and second ends and a lateral inlet connection (42) near the first end, an inner tube (47) projecting into the outer tube in sealed relation to the first end, and having a first end extending past the lateral inlet, piping connecting (41) the second end of the outer tube to the inlet of the pump, connecting (48, 49, 32) the inner tube to the bottom of the detergent container, and connecting (43, 44, 45, 30) the lateral inlet to the bottom of the water container, slow operating check valve mechanism (63, 64, 65) operative to prevent continuous flow of liquid from the water container to the liquid container, and

Abstract: A fill valve, or aspirator, which is adapted to be connected to a superatmospheric pressure source, such as helium, and which is capable of intermixing at least two fluids in intimate fashion, wherein in one embodiment, actuation of a slide-like member allows introduction of a second fluid, for example, ambient atmosphere, so that ambient atmosphere is drawn into the fill valve by reason of a venturi effect due to the interior configuration of the fill valve so that an air and helium mixture may be obtained. The fill valve ideally, in the most efficacious embodiment may be utilized for filling inflatable members with a combination of air and helium so as to decrease the cost of the fluid for inflating the inflatable article.

Abstract: Pressure cleaning apparatus comprising a pair of liquid containers at substantially the same level, including a water container (11) and a detergent container (12), a positive displacement pump (14) located below said liquid containers and having an inlet and an outlet, and an aspirator mixer (13) for supplying a mixture of water and detergent to the pump, comprising an outer tube (60) having first and second ends and a lateral inlet connection (42) near the first end, an inner tube (47) projecting into the outer tube in sealed relation to the first end, and having a first end extending past the lateral inlet, piping connecting (41) the second end of the outer tube to the inlet of the pump, connecting (48, 49, 32) the inner tube to the bottom of the detergent container, and connecting (43, 44, 45, 30) the lateral inlet to the bottom of the water container, slow operating check valve mechanism (63, 64, 65) operative to prevent continuous flow of liquid from the water container to the liquid container, and spri

Abstract: This fluid mixing valve is particularly adapted to mix steam and water to operate a liquid nozzle gun as for instance in the food processing industry to wash utensils and equipment. This valve is adapted to be connected upstream of the gun in particular to prevent burns by the steam, to minimize the waste of steam, and to minimize the occurrence and effects of water hammers resulting from mixing steam with water. This valve comprises a body defining a steam inlet, a water inlet, a heated water outlet, a heat exchanger connecting both inlets to the outlet, a piston chamber, and a venturi nozzle merging the chambers of the heat exchanger for flow of water under suction by the steam flow. A valve closes the steam inlet under the action of a piston responsive to the pressure in the liquid inlet and a bleed valve and passage are arranged to bleed unintentional flow of water when the mixing valve is closed to prevent unintentional opening of the valve.

Abstract: Disclosed is a device for injecting fuel into an intake air supply passage which is communicated with the combustion chambers of an internal combustion engine.The device comprises: a swingable throttle shaft having a hole formed therein along a longitudinal axis thereof and traversing an intake air supply passage; a throttle valve plate fixed to the throttle shaft for throttling the intake air supply passage so that the throttle valve plate can vary the opening of the air supply passage due to the swing of the throttle shaft; and a fuel injection outlet portion formed at the proximity of the surface of the throttle valve plate and communicated with one of the hole. Fuel supplied from the fuel injection outlet portion is uniformly admixed with the air flow which is caused to contract by the throttle valve plate.

Abstract: A plurality of aspirating ejector nozzles are fed with primary fluid which is admitted successively past a modulating valve and throttling orifice to the inlet ports of the nozzles with a portion of the primary fluid being arranged for bypassing the nozzle past a bypass valve controlled by pressure responsive means subject to the pressure of the primary fluid upstream of the throttling orifice.

Abstract: A venturi-type ejector for delivering cleaning liquid to an article to be cleaned and having cold and hot liquid inlets; a high pressure pump for delivering cold liquid to the cold liquid inlet; a boiler for heating liquid and having an outlet for connection to the hot liquid inlet; and a low pressure pump for delivering liquid to the boiler. A pair of motors are connected each to a different pump and are controlled to cause cold or hot fluids to be delivered to the ejector for ejection therefrom separately or together, selectively. Control elements are included for controlling operation of the boiler responsive to flow of liquid to the boiler and to temperature of fluid discharged from the boiler.