Abstract: A liquid diluting device, with a small and simple structure, is capable of reliably sealing and simply changing dilution concentration. Diluent passages are formed in a first body, and a connecting passage for introducing special liquid connects to these diluent passages. A cylindrical dial covering an opening section of the connecting passage is rotatably provided on an outer section of the first body, a plurality of jets passing through from the inside to the outside are formed in conjunction with this cylindrical dial, and the diameters of the plurality of jets are different. A liquid supply passage is set at a position opposite the connecting passage, so that the cylindrical dial is sandwiched between the liquid supply passage and the connecting passage, and the connecting passage and the liquid supply passage are connected by a jet having a diameter matching the dilution factor to introduce special liquid from the liquid supply passage to one of the diluent passages.

Abstract: A sprayer head is provided for attachment to a container containing a chemical product to be diluted by a carrier stream. The sprayer head includes a hose attachment member having structure for attaching the sprayer head to a source of the carrier stream. The sprayer head also includes a cap member, including structure for attaching the sprayer head to the container and a control mechanism movably connected to the cap member for controlling fluid communication between the cap member and the container. The control mechanism can be either reciprocated or rotated so that the sprayer head can be used either to spray a low viscosity liquid product in varying dilutions or to dilute and spray a mixture of high viscosity liquid, gelatinous or powdered product and carrier stream fluid. The control mechanism includes a seal member having product apertures of increasing sizes for controlling the varying dilutions.

Abstract: The EVRU is essentially an eductor, configured and designed, to capture and recover hydrocarbon fluids (gases and/or liquids) and/or other vapors and recombine and reinject into the system so that all the fluids are combined into a closed system to reduce or eliminate emissions (Greenhouse gases, VOC's, HAP's, CO, NOX and any other air pollutants). A measured, known volume of higher pressure fluid is fed into the eductor which draws measured, known volumes of lower pressure, hydrocarbon fluids and/or other vapors from emission (Greenhouse gas, VOC, HAP, CO, NOX and any other air pollutant) sources, combining the higher pressured fluids with the lower pressured fluids to an intermediate pressured combination fluid that is injected back into existing process equipment to close the system and prevent or minimize harmful emissions (greenhouse gases, VOC's, HAP's, CO and any other air pollutants).

Abstract: An in-line mixing apparatus for the substantially continuous production of size to be supplied to a glass fiber forming process. The in-line mixing apparatus comprises a plurality of stages wherein the first stage is a static mixing device in which sizing components are carefully metered into a flow of water or other carrier fluid, and blended together. A second stage, hydrolyzer, connected to the first stage, provides a chamber in which the blended water and size materials are allowed to chemically react as they move therethrough. A second static mixing device may be connected to the output of the hydrolyzer if additional components need to be added, or if additional mixing of the materials blended in the first stage and reacted in the second stage is necessary. The output of the in-line mixing device may be piped directly to the size applicators of the respective fiber producing operations.

Abstract: An pressure washer enclosure capable of high pressure spraying with all pumps and chemicals enclosed for the protection of personnel and security of the chemicals. An external curbside control panel allows the operator to control the amount and concentration of the fluid emissions. A sealed plumbing arrangement minimizes chemical storage, handling and exposure. The enclosure has provisions for related cleaning equipment including a ladder rack accessible from the exterior of the housing.

Abstract: The EVRU is essentially an eductor, configured and designed, to capture and recover hydrocarbon fluids (gases and/or liquids) and/or other vapors and recombine and reinject into the system so that all the fluids are combined into a closed system to reduce or eliminate emissions (Greenhouse gases, VOC's, HAP's, CO, NOX and any other air pollutants). A measured, known volume of higher pressure fluid is fed into the eductor which draws measured, known volumes of lower pressure, hydrocarbon fluids and/or other vapors from emission (Greenhouse gas, VOC, HAP, CO, NOX and any other air pollutant) sources, combining the higher pressured fluids with the lower pressured fluids to an intermediate pressured combination fluid that is injected back into existing process equipment to close the system and prevent or minimize harmful emissions (greenhouse gases, VOC's, HAP's, CO and any other air pollutants).

Abstract: An apparatus for mixing fluids includes a housing which is mounted in line with a conduit carrying a primary fluid. A deformable member is mounted in the housing and an inlet conduit carrying a secondary fluid communicates with the deformable member. An adjustment knob adjusts the width of the deformable member, thereby adjusting the venturi effect created by the deformable member in the flow of primary fluid and adjusting the flow of secondary fluid which flows into the deformable member and is induced out of the deformable member through a plurality of holes to mix with the primary fluid. A system is provided with the fluid inductor apparatus and includes a sensor at the fluid outlet to generate a signal to control the geometric profile of the deformable member to adjust mixing of the fluids.

Abstract: A device for injecting liquid chemical solutions into the flow of a lawn sprinkler system. The device allows the user to easily attach and remove chemical jars without the risk of losing the prime on the pump.

Abstract: A water flow controlled dispenser of liquid or water-soluble beneficial chemicals for sprinkling systems.

Abstract: One embodiment of the invention encompasses a fluid vacuum system for vacuuming-up discharge fluid from a fluid source without applying a vacuum to the fluid source. The system comprises a discharge conduit, a vacuum source, and a vacuum-breaker. The discharge conduit is in fluid communication with the fluid source. And, the vacuum-breaker connects the discharge conduit to the vacuum source such that the vacuum source applies a vacuum to the discharge fluid without applying a vacuum to the fluid source. Select embodiments are optimized for use with dialysis machines in dialysis clinics. A closed system, preferably a vacuum system, is provided for disposal of noxious odors and fluids.

Abstract: Apparatus for irrigating wounds in which a housing contains a water filter and an anti-biotic, connected between a water supply and a hand spray unit, with the housing containing a hand operated valve for directing the water from the water supply through either the anti-biotic and filter or directly to the hand spray unit. A water temperature display is also included in the housing.

Abstract: An apparatus for mixing fluids includes a housing which is mounted in line with a conduit carrying a primary fluid. A deformable member is mounted in the housing and an inlet conduit carrying a secondary fluid communicates with the deformable member. An adjustment knob adjusts the width of the deformable member, thereby adjusting the venturi effect created by the deformable member in the flow of primary fluid and adjusting the flow of secondary fluid which flows into the deformable member and is induced out of the deformable member through a plurality of holes to mix with the primary fluid.

Abstract: A purge valve for use with a chemical select valve comprises, in a preferred embodiment, an enlarged chamber in the vacuum impelled feed line to the select valve. The chamber is formed by resilient walls, collapsible upon vacuum operation to draw chemical into a venturi line where it is mixed with water and dispensed. The walls do not fully collapse and provide passages for chemical flow. Upon vacuum interruption, the chamber walls expand, returning the chamber to its larger volume and drawing chemical back upstream from common passages in the select valve. Another chemical can then be selected without contamination of the preceding chemical in the common passages.

Abstract: A spray assembly for mixing catalyst with a high viscosity material and applying thin coatings of that material to a substrate that is particularly useful for applying body putty to a surface. The spray assembly has first and second through air passageways between an inlet end portion and different portions of an outlet end. The through air passageways each have a straight central axis adjacent the outlet end, the extensions of which axes outside the spray nozzle intersect a short distance from the outlet end of the spray nozzle. A large suction tube for the larger first air passageway has an upper end positioned within a cylindrical portion of the first air passageway. Air streams propelled through the passageways draw high viscosity material through the larger suction tube and catalyst through a smaller suction tube into those air streams. Intersection of those air streams outside of the nozzle mixes the catalyst material with the high viscosity material.

Abstract: A valve for introducing polymer into a moving water stream prior to flowing he water stream, with the polymer therein, onto a hull surface of an underwater vehicle. The valve comprises a venturi block having therethrough a venturi passageway for flowing water therethrough, a polymer inlet tube extending through the venturi block and into the venturi passageway for introducing the polymer into the water flowing through the venturi passageway. A shut-off plunger extends through a bore in the venturi block and is axially aligned with the polymer inlet tube, the plunger being reciprocally movable in the bore between a first position in which a head portion of the plunger extends into and seals closed the polymer inlet tube, and a second position in which the head portion of the plunger is spaced from sealing engagement with said polymer inlet tube. A piston and cylinder assembly moves the plunger between the first and second positions.

Abstract: A pressurized chemical tank is connected to a water line through a restriction (e.g., a gas flow control valve). A vacuum-regulating check valve is for maintaining the vacuum pressure of the gas flowing between the tank and the restriction. A gas flow rate sensor is between the restriction and the water line. The sensor is constructed to be responsive to pressure in the gas line, and can be connected to a remote display and/or storage device. The sensor can also provide a feedback signal to a control system for controlling the flow rate.

Abstract: A washing machine including a first electromagnetic valve connected to a cleaning solution supply source, a supply pipe having a cleaning solution input port connected to the first electromagnetic valve to receive cleaning solution from the cleaning solution supply source and a clean water input port connected to a clean water supply source to receive clean water from it and an output port, a second electromagnetic valve connected between the output port of the supply pipe and an automatic nozzle for permitting clean water and/or the cleaning solution to be delivered to the automatic nozzle, and a check valve for controlling the flowing direction of the cleaning solution from the first electromagnetic valve to the second electromagnetic valve.

Abstract: A self-sealing venturi type mixing valve for mixing a polymer with water as t is being dispensed. A hollow piston is slidably mounted in the valve body. Water flows through the piston and into a venturi tube causing the water flow to become turbulent. A circumferential slot connected to a polymer reservoir surrounds the downstream end of the piston. The piston is spring-loaded within the valve such that its downstream end seals against the portion of the valve body forming the throat of the venturi tube, also sealing the slot from the venturi tube. When polymer flow is started, the pressure of the polymer pushes the piston away from the throat, allowing polymer to flow into the tube and mix with the water. When the polymer flow is shut off, the spring-loaded piston closes off the slot. Any polymer remaining in the slot is sealed off from contact with water, thus preventing clogging of the valve.

Abstract: A hot water plumbing system comprising a water heater, a delivery location, a delivery line delivering water from said heater to said delivery location, a riser located adjacent said delivery location and extending upward above the level of said heater, and a return line connected adjacent the upper end of said riser and inclined so as to extend gradually downward to an input located adjacent the bottom of said heater to provide a continuous flow of hot water within the system, which ensures immediate and constant delivery of hot water to the delivery location and prevents accumulation of sediment within the system and, hence, minimizes installation and maintenance costs and significantly reduces the amount of wasted water. The system particularly employs a vacuum accelerator, which can be used to increase system vacuum and which causes rapid start-up or priming of the system.

Abstract: An improved selector valve includes a sealing disc with a sealing face biased against an opposed sealing face of a port plate. The sealing disc has a channel located in the sealing face which communicates with an outlet port and a single selected inlet port on the port plate while simultaneously sealing off all other inlet ports. A venturi eductor has a suction passage sealed directly to the port plate outlet for connecting the venturi directly to a selected inlet port. A connection bridge spans a tolerance gap between the port plate to the eductor. The flow path of the fluid through the selector valve has been streamlined to eliminate stagnation points and minimize turbulent flow of the fluid. As a result, the dilution rate of the chemical and water being dispensed upon actuation of the valve is improved and purging of the selector valve is eliminated because the amount of residual chemical remaining in the selector valve is minimized.

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 sewage removal device for use with a recreational vehicle. The device is comprised of a housing attachable to the sewage drain conduit of the recreational vehicle. Sewage from the recreational vehicle drains into a cavity in the housing, and a water inlet directs a stream of water through a nozzle into an outlet conduit in the housing. The water stream facilitates removal of sewage as the sewage drains from the recreational vehicle into the cavity of the housing.

Abstract: A fully automated cappuccino, latte, and espresso brewing machine which includes a refrigerated milk supply from which milk is drawn by a steam driven venturi apparatus. The venturi subcombination includes independently electrically operated valving for the driving steam, for drawing milk from its supply, and for drawing air, as desired, for foaming the milk in a vortex mixer coupled to the output of the venturi. The valving may be sequential so that with each cycle of use of the apparatus, it is hygienically steam cleaned of all milk residue.

Abstract: A choke-bypass system is arranged upstream of the gas analyzer so as to generate a constant input pressure at the gas analyzer. The measurement range of the gas analyzer can be expanded considerably beyond the standard range while maintaining accuracy of measurement when the measurement gas is diluted with an inert gas above a given gas concentration threshold in such a way that the gas concentration in the gas analyzer remains constant. To this end, a dilution gas line (12) with a control valve (13) for continuous dilution of the measurement gas with the inert gas is connected to the choke-bypass system (1), (2), (3), (6).

Abstract: The present invention is a chemical dispenser for use in servicing at least two laundry cleaning machines to dispense a plurality of chemical agents utilized in the process of cleaning soiled laundry, wherein at least two of the chemical agents are compatible. The chemical dispenser has a plurality of chemical dispensing systems designed to deliver a selected chemical agent from a source to a washing machine. A chemical dispensing system is in flow communication with each chemical source and in flow communication with each washing machine. Each chemical dispensing system has a pump and a delivery conduit. For selected chemical agent delivery, the pump is a venturi injector pump. The chemical dispensing systems utilized for dispensing compatible chemical agents have a common portion and are fluidly independent from chemical dispensing systems utilized for dispensing incompatible chemical agents.

Abstract: The invention involves an apparatus for the induction and admixture of additives into a fluid stream by means of a joining piece, whereby a plug projects into the fluid stream and blocks a major part of the stream cross-section. This plug exhibits, in the area of the flow-through gap, an opening that is joined with a connecting conduit for the additive that is to be inducted. It is fundamental that the gap cross-sections for the fluid steam on both sides of the plug are of differing sizes.

Abstract: An improved selector valve includes a sealing disc with a sealing face biased against an opposed sealing face of a port plate. The sealing disc has a blind slot located in the sealing face which communicates with an outlet port and a single selected inlet port on the port plate, while simultaneously sealing off all other inlet ports. Detents define the angular radial disposition of the slot for indicating which inlet port is selected. A venturi eductor has a suction passage sealed directly to the port plate outlet for connecting the venturi directly to a selected inlet port.

Abstract: A system for diluting and dispensing concentrated liquid products is disclosed. The system includes a dispensing device (10, 150) containing a removable proportioning means such as an aspirator assembly (40, 154). A concentrate pickup tube (114) attaches to the dispensing device and is in fluid communication with the aspirator assembly. The dispensing device can utilize a rigid outlet tube (20, 159) which is removably attached to nozzle tip (18, 158) for dispensing to large containers. Also disclosed is a method for diluting and dispensing chemical solutions using the dispensing device of the invention.

Abstract: A liquid fertilizer dispensing device comprising a container adapted to hold liquid fertilizer solution; means at the top thereof to connect to a water faucet and to dispense a stream of water therefrom; feeder tube means extending from the interior base of said container to a point adjacent the stream of water passing through said top means so that the venturi effect of the passing stream of water will suck the fertilizer solution up through said feeder tube means and inject the same into the passing stream of water; valve means to adjust and control the rate of flow of said fertilizer solution into and through said feeder tube means; and preferably additional means to constantly indicate the level of fertilizer solution within said container and to permit the addition of more solution or granulated fertilizer to said container.

Abstract: An air aspirating nozzle for propelling a stream of foam or a slurry of solid particulates to a target surface includes a stream shaping member within the nozzle to form a rotating, columnar stream of liquid and air which maintains a high degree of coherence over a considerable throw distance. The nozzle assembly may include a flow control unit for the introduction of a foam concentrate or a fluid suspension of particulate solids into the nozzle.

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 automatic fertilizing device for introducing lawn care chemicals such as fertilizer, herbicides, insecticides, and fungicides into a sprinkler system, comprising a container having a control plate insert to divide the container into an upper and lower volume, wherein the container and control plate are mounted to a flow head, such that the flow head controls the amount of chemicals drawn from the container and dispersed into the main water line. This device may also be employed in pool systems for dispersing chlorine.

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 flame spray coating system includes a thermoplastic resin powder supply hopper, an eductor adapted to entrain powder in a stream of conveying air, a valve disposed between the powder hopper and eductor for controlling the flow of powder from the hopper into the eductor, a flame spray gun and conduits interconnected between the flame spray gun and pressurized air and combustion gas sources for delivering flows of propelling air, conveying air, powder entrained in conveying air, and a combustible gas to the flame spray gun, and an eductor control disposed on the flame spray gun for controlling operation of the valve disposed between the powder hopper and eductor. A solid circular coating pattern is created with a nozzle constructed for twirling the entrained powder and conveying air. Interchangeable combustion nozzles of different sizes allow the same spray gun to be used for different substrate conditions.

Abstract: The invention is an apparatus for mixing and injecting into a well tubular a dry material/liquid slurry. The apparatus is comprised of an entrainment chamber having an inlet and an outlet, a hopper having an inlet, and an outlet detachably connected to the chamber inlet, a jet nozzle vertically positioned adjacent the hopper outlet and a tubing connector attached to the chamber outlet. Pressurized liquid is passed through the jet nozzle creating a partial vacuum, entraining gravity fed material from the hopper to form a slurry. The slurry passes through the tubing connector and is injected into a well tubular which are detachably connected to the tubing connector.

Abstract: A chemical intake system has an aperture plate with apertures of varying fluid flow resistance all connected to a first fluid source. A first tube is connected to one of the apertures in the aperture plate and to a suction tube. A second tube is connected to a second fluid source and to the suction tube. The amount of the first fluid flowing into the suction tube is regulated by attaching the first tube to various apertures in the plate. The amount of fluid flowing through the first tube also regulates the amount of the second fluid flowing through the second tube and into the suction tube.

Abstract: A automated, milk inclusive espresso coffee machine which includes a fully automatic coffee grinding and brewing apparatus and a steam generator for driving a venturi mixing device which draws ambient air and milk from a refrigerated source for making milk inclusive espresso beverages, all milk contacting surfaces being either refrigerated or steam cleaned with each beverage made and served. A novel microprocessor controls all operations including brewing, steam generating, water heating, refrigerating, operations parameters, measuring and monitoring, many "house-keeping" functions and others.

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: 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: There is disclosed a spraying gun in which the direction of the spray can be changed to make it possible to spray onto the back side of the object being sprayed. The gun comprises a feeding unit, a spraying unit and a connecting pipeline.

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: A pumping system is described for pumping a first fluid (e.g., water) and selectively adding a second fluid (e.g., fire retardant chemical, fertilizer, pesticide, etc.) to the first fluid. The system includes a pump connected to a discharge manifold having discharge openings. An inlet conduit is connected between the pump and the first fluid. An eductor conduit is connected between the discharge manifold and the inlet conduit. A feed conduit feeds the second fluid to the eductor. A control valve selectively allows the second fluid to be fed to the first fluid. When the second fluid is not being added, the feed line is flushed without changing pressure.

Abstract: A coupling (10) for being mounted between the threaded end of the arm (16) of a shower through which water flows and the showerhead (18) for mixing liquid into shower water. The coupling (10) includes a coupling body (20) having an inlet portion and an outlet portion with a flow path defined therebetween. A mixing chamber (32) is mounted in fluid communication with the flow path through the coupling body (20) which serves to selectively mix liquid such as body lotion with the water. In this regard, a vacuum generated by a venturi serves to draw the liquid into the mixing chamber. The vacuum is selectively controlled by a vacuum actuator (52) which holds the vacuum until the shower is turned off.

Abstract: An apparatus for distributing liquid fertilizers, pesticides and other chemicals by aspiration into irrigation conduits. Liquid passing through a conduit attached to a storage vessel syphons the chemicals out of the storage vessel and into a liquid distribution system. An anti-backflow check valve is provided to prevent liquid from entering the supply container when liquid flow is stopped in a liquid distribution system. A float-controlled valve is also provided which closes when the liquid level in the supply vessel reaches a predetermined level in order to prevent air from entering the system. The amount of chemical aspirated into the liquid distribution system is controlled by a valve. The apparatus is easily assembled and disassembled for cleaning or repair, and can be connected to existing liquid distribution systems. Larger or remote reservoirs can be incorporated depending on the application.

Abstract: A personal shower fixture to be inserted between a shower pipe and shower head for introducing a selected one or a mixture of several fluids contained in the fixture into the water flow to the shower head. A venturi in the fixture draws the fluids into the flow through a conduit having branches in the fluid containers, each branch having a valve and the common branch into the venturi having a flow control valve. The fluid containers are supported in a cylindrical basket secured by a bayonet connector to the bottom of the fixture body, the basket having a fluid sight gauge and floor openings for easy removal of a container. There are no check valves in the conduit system so that the conduit and its branches may be easily cleaned by merely blocking the shower head output to backflush the conduit system.

Abstract: Apparatus for converting high pressure, low volume air to low pressure, high volume filtered air in order to successfully atomize fluids, such as paint, of various viscosities. The invention makes it possible to utilize safe, economical compressor air to atomize fluids by a portable enclosure including a variable jet venturi induction pump which separates the pump from the area of application and other potentially contaminating elements. Ambient air is introduced into the portable enclosure after regulation and filtration. A low pressure field is established in the induction pump by increasing the velocity of the compressor air in a venturi section of the pump but is free of contaminates generated, for example, by overspray in the vicinity of the area of application.

Abstract: Apparatus for the treatment of water supplies with the gas of the type comprising, in sequence, the following elements: (a) a vacuum regulator 2 for providing a low pressure supply of the gas from a high pressure source; (b) a monitor system 3 to signal unwanted pressure changes; (c) a gas flow meter 4; (d) an output flow control valve 5 coupled with a vacuum relief valve 6 to ensure the gas pressure stays above a required level; (e) a differential control valve 8 serving to maintain a constant pressure differential between the output flow control valve and the mixing device, (f) a gas and water mixing device 9, is improved by arranging that at least two successive elements (a) to (f) are directly abutted for gas flow through aligned openings. Abutted elements are conveniently housed in monolithic blocks.

Abstract: An emulsifier assembly for emulsifying air, steam, and milk in preparing cappuccino and like beverages, particularly for use with bar-size espresso coffee makers, being also adapted for heating up milk in preparing cafe au lait, comprises a body, a steam delivery channel opening into a suction chamber of the body, an air intake line and a milk intake line. Both lines are in communication with the suction chamber, and a flow rate adjuster is connected in the air intake line. A before shutter member is opertive in the air intake line, and a restrictor member is operative in an end section of the milk intake line. Both of these members are hand-actuatable.

Abstract: A variable colorant blender is provided for use as adjunct to an airbrush (A) or other spray gun. It includes a plurality of metering valves or similar devices which are actuatable wholly independently of one another for enabling the user to obtain and continuously change any colorant blend and also to perform a rapid rinsing. In preferred embodiments electric metering valve actuators are provided, which are energized by electronic circuit means contained in a control box (16) remote from that portion (10) of the blender which is affixed to the airbrush or other spray gun in replacement of the usual colorant-containing vessel 1, such control box having slides (41) for presetting and changing the proportions of colorants in the discharged blend, and possibly also a push-button (42) for controlling the amount of cleaning liquid (solvent).