Abstract: The regulator assembly comprises body member carried by a support and defining a cavity for detaining a pool of abrasive slurry. An overflow device is associated with the body member for establishing the upper level of a pool of abrasive slurry in the cavity. At least one flow-restrictive conduit component is secured at one end to the body member, communicates with the cavity at the lower end of the pool of abrasive slurry, and presents an outer end from which abrasive slurry is discharged. One of the above-indicated elements is movable whereby to selectively adjust the vertical distance between the plane of the upper level of the pool of abrasive slurry and the plane of the outer end of the conduit component.

Abstract: A mixing and dispensing apparatus for liquids that react chemically with each other from plural independent sources mixes same, and then cleans itself by injecting a terminal portion thereof into a mold. The mixing and dispensing means is intended to be incorporated into a system that provides measured quantities of the respective liquids, has control valving external of the mixing and dispensing means of the invention, and can recirculate the respective liquids except during actual mixing and dispensing. The mixing and dispensing apparatus has porting and passageways in its housing to permit recirculation and has a plunger which can be adjusted in its stroke to cover or uncover a certain amount of the mixing ports through which the respective liquids flow into the mixing chamber thence into the mold cavity.

Abstract: A head for a beverage mixing and dispensing machine comprises a block having bores that define a water inlet connectable with a source of pressurized water, a concentrate inlet connectable with a substantially unpressurized concentrate source, and a venturi aspirator. Mixed water and concentrate flow from the aspirator to a holding chamber in the block that opens downwardly to an outlet spout. A recirculation passage in the block brings mixed liquid back to the aspirator from the holding chamber. Proportioning of concentrate to water is adjusted by a needle valve controlling communication between the holding chamber and the recirculation passage. The head block is readily removably locked to a cabinet that accommodates ducts and control mechanism.

Abstract: Fuel is selectively jettisoned through the engine of an aircraft by way of a normally closed, solenoid-operated jettison valve which is fed from the boost pump in the engine fuel system. The jettison valve is servo activated by the main fuel flow so that the engine must be running for the opening of the solenoid valve to occur. For an engine having an augmenter, other interlocks are provided to prevent the jettison of fuel when the augmenter is in use and to preclude the ignition function to the augmenter while fuel is being jettisoned.

Abstract: A system is described wherein components such as a prepolymer and a curative are delivered by means of positive displacement pumps through a special valve at the upper end of a static mixing tube. The components pass down the tube while being intermixed to form a reaction mixture which is dispensed into a mold by means of a valve at the lower end of the tube. The special valve forms part of a recirculation system which permits bypass and recirculation of each component between dispensing operations so that the pump can continue to operate at constant velocity. The static mixing tube is pivotally suspended from an arm so that its lower end may be properly positioned with respect to a mold to be filled. Special end interlocked mixing vanes are provided in the static mixing tube for convenient disassembly.

Abstract: This invention relates to an apparatus for dosing and mixing at least two fluid reactants consisting of a dosing unit; a mixing head and conduits connecting the dosing unit and mixing head; characterized in that the housing of the dosing unit and the mixing head together form a rigid block with the conduits connecting the dosing cylinder with the mixing chamber in the form of channels inside the block.

Abstract: A flow regulator is disclosed for controlling liquid flow, for example, from a supply source to a receiving tank according to the liquid level in the tank. Specifically, a fluid interaction device communicating with the receiving tank causes a fluid pressure signal to be developed in response to departure of the liquid in the tank from a predetermined level. A differential pressure responsive valve adjusts liquid flow from the supply source to the receiving tank in response to the fluid pressure signal. Several embodiments and other features including a bypass for enhancing stable flow and a preferred valve structure are disclosed.A beverage dispensing system incorporating the aforesaid flow regulator is also disclosed. A cold carbonated liquid is continually circulated past dispensers from a pressurized chill tank having a carbon dioxide atmosphere. The flow regulator admits further liquid to the system from a supply source whenever liquid is tapped from the system by the dispensers.

Abstract: A powder-feeding method and apparatus according to which it is possible to provide one or a plurality of powder-feeding flows in which the powder is fed at a substantially constant rate which is of relatively small magnitude. A cone of powder is maintained substantially centrally of a disc which is rotated at a constant speed. A coarse scraper blade extends inwardly across the periphery of the disc into the cone of powder thereon substantially radially with respect to the disc so that the coarse scraper blade removes some powder on one side of the blade while leaving on the disc on the other side of the blade a layer of powder the depth of which is determined by the distance between the bottom edge of the coarse scraper blade and the top surface of the disc.

Abstract: In an apparatus for the discontinuous dosing of a constant quantity of fluid into an analysis device, the fluid feed system is connected by means of a three-way valve on the one hand via the dosing valve and a shut off valve arranged downstream and on the other hand via a by-pass to the fluid discharge system. A compressed air source for the production of a constant air pressure is connected between the three-way valve and the dosing valve. All the components of the system are controlled by a programme control unit, so that the fluid flow through the dosing valve is temporarily interrupted by closing the shut off valve and switching over the fluid feed to the by-pass and at the same time releasing the connection of the compressed air to the dosing valve. Thereafter the compressed air source is switched off by the control unit and the interruption of the fluid flow at the dosing valve is cancelled.

Abstract: An apparatus to inject fine hygroscopic powder into a high pressure stream has a dispenser which dispenses powder onto a flared dispersing surface mounted in a mixing receptacle. The flared dispersing surface disperses the powder and deposits the powder onto a collector portion of the mixing receptacle. A water supply means creates a film of water on the collector portion to mix the powder and water. An outlet on the bottom of the mixing receptacle is coupled to a high pressure stream through a venturi orifice to draw the mixture into a high pressure stream.

Abstract: Disclosed is a device which permits a plurality of fluids to be received in a mixing chamber simultaneously through nozzles from fluid input chambers. Actuation of a fluid cylinder opens valves so that the fluids are received under pressure in the input chambers. A second fluid cylinder then opens the mixing chamber so that the nozzles emit both fluids simultaneously which mix by impingement and thereafter are dispensed from the mixing chamber. When the valves are closed recirculation is accomplished through a plurality of ports, thereby allowing the fluids to remain at desirable temperatures and viscosity.

Abstract: A liquid sample analyzer having a first fixed-volume chamber into which a first liquid is flowed filling it for subsequent displacement of the liquid volume therefrom by a second liquid into a substantially larger second fixed-volume chamber through a first port thereof, the second liquid acting as a pilot fluid. Prior to such liquid volume displacement from the first chamber, the second chamber, having an overflow outlet at a location remote with respect to the first port, is washed out and filled to an overflow level by a flow of the second liquid entering the second chamber through a second port.

Abstract: The regulator assembly comprises body means carried by a support and defining a cavity for detaining a pool of abrasive slurry. Overflow means is associated with the body means for establishing the upper level of a pool of abrasive slurry in the cavity. At least one flow-restrictive conduit means is secured at one end to the body means, communicates with the cavity at the lower end of the pool of abrasive slurry, and presents an outer end from which abrasive slurry is discharged. One of the above-indicated means is movable whereby to selectively adjust the vertical distance between the plane of the upper level of the pool of abrasive slurry and the plane of the outer end of the conduit means.

Abstract: Thixotropic battery paste is metered at a substantially predetermined volumetric flow rate onto a battery grid with the aid of a positive displacement pump means and alternate operation of a pair of cylinder and ram metering devices which are synchronized to deliver the paste substantially without turbulence to a discharge means such as a nozzle for delivery to the battery grid substrate.

Abstract: A liquid dispensing and vapor recovery system in which a control unit is connected to a storage tank for the liquid and directs the liquid to a pair of conduits which pass the liquid to a receptacle and back to the storage tank, respectively. A reduced pressure zone is established in the conduit connected to the storage tank and is in communication with the receptacle for drawing vapors from the receptacle for passage back to the storage tank. The control unit prevents the flow of liquid back to the storage tank until gasoline is delivered to the receptacle and modulates the vapor flow back to the storage tank in response to the flow through the conduit connected to the receptacle.

Abstract: A liquid dispensing and vapor recovery system in which an underground storage tank is connected to a first conduit for delivering a liquid, such as gasoline, to a vehicle gasoline tank or the like under the force of a pump located in the storage tank. A second conduit is connected to the first conduit and to the storage tank for diverting a portion of the gasoline in the first conduit back to the storage tank and an injector is located in the second conduit for forming a reduced pressure zone in response to gasoline flow through the second conduit. A valve unit prevents the flow of gasoline through the second conduit until gasoline is delivered to the vehicle gasoline tank. A third conduit is connected to the vehicle tank and to the second conduit at the reduced pressure zone for drawing the vapors from the vehicle tank into the second conduit for passage into the storage tank.

Abstract: A housing has a compartment subdivided by a pair of sleeve valves into an input compartment to which is continuously fed a stream of viscous hardenable material and an output compartment arranged adjacent a transport device which step-wise advances a succession of containers. Each of these sleeve valves has a central piston and has a valve port that can be directed either into the input compartment or the output compartment. Thus one of the sleeves is turned with its port toward the input compartment and its piston is retracted to draw into the sleeve a predetermined quantity of the viscous mass. Thereupon the sleeve is rotated through 180.degree. and this portion is discharged into the output compartment and thence into one of the containers.

Abstract: The embodiment of the invention disclosed herein is directed to a hand-propelled chemical applicator which dispenses liquid chemicals when the applicator is manually pushed over an area of ground to be treated. The applicator is a fluid-dispensing device having a support frame supported on the ground by a main wheel rotatably secured thereto. A pump is secured to the support frame and is selectively engageable with and driven by the main wheel to develop sufficient pressure to draw liquid chemicals from a reservoir and deliver the chemicals to two or more dispensing nozzles secured to the support frame. The pump produces sufficient pressure during a normal walking speed of an operator to provide substantially constant dispersion of the chemical. The chemicals within the reservoir are maintained in a mixed condition by providing a return fluid flow path of chemicals from a distribution manifold back to the reservoir through a separate return flow path.

Abstract: A mixing apparatus including a mixing chamber with a reciprocating valve piston and a separate "recycle" chamber with a reciprocating grooved plunger. Piston and plunger are controlled in unison by a piston and cylinder assembly. In the "open" position of the valve piston pressurized components supplied through inlet conduits may enter the mixing chamber. In the "closing" position of the valve piston, the components supplied are by-passed across the grooved plunger back to their respective reservoirs.

Abstract: A regulator in a system for delivering a liquid under pressure to a sprayer maintains a substantially constant pressure in the system and a continuous flow back to the source with the volume of the circulating liquid inverse to the volume utilized by the sprayer.

Abstract: A metering applicator apparatus has an accurately controlled fluid or compound discharge which discharge is the difference between the discharge of a constant displacement metering pump and the discharge of a pressure regulating device. The constant displacement metering pump discharges a constant predetermined volume and pressure of fluid. The pressure regulating device downstream of the constant displacement metering pump has a carefully controlled braking arrangement for controlling the volume and pressure of fluid maintained in the system with the balance being motored or bypassed through the pressure regulating device and back to a supply tank. The difference between the fluid from the constant displacement metering pump and the fluid motored or bypassed back to the tank is the volume of fluid at a constant pressure available at the applicator gun or nozzle.

Abstract: A liquid dispensing and vapor recovery system and a vapor control unit used therein in which the control unit has a pair of inlets for receiving liquid, such as gasoline, from an underground storage tank and for receiving gasoline vapors from a vehicle tank during dispensing of the gasoline into the latter tank. A first passage is provided in the control unit for passing the gasoline from the storage tank to a hose connected to the vehicle tank, and an additional passage is provided in the control unit for diverting a portion of the gasoline. A valve is provided which controls the flow of gasoline through the additional passage in response to the flow of gasoline through the first passage and an injector nozzle is provided in the additional passage for drawing vapors from the vehicle tank and into the second passage for mixing with the gasoline before being discharged back to the storage tank.

Abstract: The preferred embodiment of the invention disclosed herein relates to a feeding and mixing arrangement for generally fluent material including components having different specific gravities, for example, certain food products, and includes a supply hopper in which the material is adapted to be contained. The supply hopper has an open upper end and has both discharge and inlet openings in its base. The discharge opening communicates through a supply conduit with an associated device, for example, a container filling apparatus, to which the fluent material is to be delivered and the inlet opening communicates with the supply conduit through a return conduit connected to the supply conduit adjacent the container filling apparatus.

Abstract: A slip casting apparatus comprising a supply tank, a reserve well in communication with said tank, a pump means to pump said slip from said tank through a delivery means to casting molds and having provision for continuously recycling the slip in and out of the supply tank. The same pump is utilized both to deliver slip to casting molds and to recirculate slip within the supply tank, in a manner which eliminates settling and relieves the pump from undue pressure. This apparatus has application for use with other liquids of similar characteristics. The well also functions to prevent the formation of air bubbles.

Abstract: A liquid dispensing and vapor recovery system in which an underground storage tank is connected to a first conduit for delivering a liquid, such as gasoline, to a vehicle gasoline tank or the like under the force of a pump located in the storage tank. A second conduit is connected to the first conduit and to the storage tank for diverting a portion of the gasoline in the first conduit back to the storage tank and an injector is located in the second conduit for forming a reduced pressure zone. A third conduit is connected to the vehicle tank and to the second conduit at the reduced pressure zone for drawing the vapors from the vehicle tank into the second conduit for passage into the storage tank. Valve means are provided which are responsive to the rate of flow of the liquid through the first conduit for regulating the flow of vapor through the third conduit.

Abstract: The fluid forced by a pump 1 through a conduit 2 towards a point of use such as a spraying bar 6, passes through a gate valve 7 which generates a pressure drop. The higher pressure P0 and the lower pressure P1 thus determined act on a diaphragm 10 which carries a flap valve member cooperating with a seat 18 formed at the inner end of a discharge tube 15-5 which returns the liquid to the tank from which it is pumped. An auxiliary diaphragm 17 acts in the reverse direction. As soon as the pressure difference P0 - P1 exceeds a given value, the flap valve member 14 closes. It is easily demonstrated that under such conditions the delivery pressure P1 is proportional to the pressure drop P1-P0, irrespective of the flow rate through the nozzles of the sprayer bar 6. If 1 is driven at a constant speed, P1 therefore remains constant.The invention is particularly applicable to agricultural sprayers.