Abstract: An easily-emptied drain oil container for used motor oil. The oil is drained into a pan and then run into a container. Air pressure induced into the container closes the intake so that pressure in the container will force the oil from an exit tube into a disposal tank.

Abstract: The blanketing valve has a diagnostic port to aid in analyzing the valve's operation. A pressure gauge is connectable or permanently connected to the diagnostic port. The diagnostic port measures the pressure above a main valve in a passageway connecting a pilot inlet chamber and a main valve piston chamber. This pressure controls the main valve and is an indicator of pilot valve action. Comparing this pressure to inlet pressure indicates pilot response and is a valuable aid in determining what problems may exist.

Abstract: A tank blanketing system protects both the tank vapor space and the environment. A pad valve supplies inert gas to the vapor space and maintains the pressure in the vapor space under conditions that tend to reduce the pressure in the vapor space. Should the pressure rise a predetermined amount above the setting of the pad valve, a depad valve will open to vent vapors so as to return the pressure in the vapor space to its designed operating range. The depad valve is connected to a recovery piping system that will route the vapors to an appropriate device that processes or disposes of them in a predetermined manner.

Abstract: A photoresist spraying apparatus for coating a photoresist with pressure from a nitrogen gas includes a tank which has a photoresist holding portion and an air portion. A photoresist inflow conduit is connected to a sidewall of the tank to intake photoresist and a photoresist outflow conduit is connected to a bottom of the tank for discharging photoresist. A T-shaped gas conduit has a gas inlet, a gas outlet and a connecting portion therebetween for connecting to the tank. The flow of a gas from the gas inlet to the gas outlet lowers the air pressure inside the tank so that air and bubbles remaining inside the tank are discharged to the gas outlet via the connecting portion, while a photoresist flows into the tank via the photoresist inflow conduit. A valve, provided in the gas outlet of the gas conduit, opens and closes to fill and discharge photoresist in the tank according to the pressure inside the tank.

Abstract: A method for fighting fire uses a source of fire-extinguishing liquid, a source of gas at an available pressure, and interconnected hydraulic accumulators including at least one gas container and at least one liquid container. The hydraulic accumulators are charged by interconnecting the hydraulic accumulators into fluid communication with each other, initially filling the hydraulic accumulators with the gas at the available pressure from the source of the gas, and subsequently filling the liquid container with the fire-extinguishing liquid from the source of the fire-extinguishing liquid so that the fire-extinguishing liquid drives the gas from the liquid container into the gas container and compresses the gas in the gas container to a desired initial charging pressure and directs the fire-extinguishing liquid toward the fire upon occurrence of the fire. For the directing the gas presses the fire-extinguishing liquid out of the liquid container at the charging pressure toward the fire.

Abstract: Apparatus for the delivery of a chemical slurry to at least one downstream facility. The apparatus comprises a measuring vessel of predetermined volume into which a liquid chemical component is introduced. A conduit connects the measuring vessel to multiple chemical sources, wherein each of said chemical sources comprises a liquid chemical component. Another conduit connects the measuring vessel to at least one mix tank. A pressure-vacuum vessel is in communication with said at least one mix tank, whereby chemical is drawn from said at least one mix tank to the pressure-vacuum vessel under negative pressure and chemical is delivered from the pressure-vacuum vessel to said at least one downstream facility under positive pressure. The pressure-vacuum vessel is in fluid communication with both said at least one mix tank and said at least one downstream facility. Valves on each of the conduits control the chemical flow therethrough.

Abstract: The invention concerns a device for distributing liquid by gravity, particularly in a photographic coating process.The device comprises: a) a rigid cylindrical outer pipe; an inner casing produced from a flexible material and the external diameter of which is less than or equal to the internal diameter of the pipe, said casing being arranged so as to define, with the pipe, substantially concentric first and second zones isolated from each other, the second zone being connected to a source of fluid so as to be able, under the effect of the pressure of the fluid, to cause the relative volumes of the first and second zones to vary in order to control the flow of liquid in the first zone; and c) a source of pressurized fluid connected to the second zone.

Abstract: An aircraft defueling system includes a fuel jettison port (10) extending between the bottom side of a fuel tank (11) an the exterior of an aircraft. The port is sealed with a glass closure (12). A cylinder (13) with a piston (17) therein is positioned above the glass closure. A pressurized inert gas bottle (23) is connected to an expandable chamber (28) between the top ends of the cylinder and the piston. A metering port (27) is arranged on the side of the cylinder below the piston. Just prior to an unavoidable crash, a valve (25) on the gas bottle is opened to force the piston downwardly, so that the glass closure is broken by a conical bottom extension (18) on the piston. The piston is moved past the metering port. The inert gas is released into the fuel tank through the metering port, so as to pressurized the fuel tank and rapidly jettison the fuel through the port.

Abstract: An apparatus for replacing particles in a process that transfers particles is disclosed. The apparatus employs a seal zone which is in communication with two zones of the process and in which particles that are being added to the process are purged. The apparatus allows particles to be replaced without reducing the normal rate of particle transfer through the process, which results in a savings in downtime costs. This invention is adaptable to a multitude of processes for the catalytic conversion of hydrocarbons in which deactivated catalyst particles are regenerated.

Abstract: A multi-component feed system to feed two fluid materials from a feed tank to a spraygun is described. The combined pressure feed tank comprises a pressure feed tank with a lid. Inside the tank is a removable support structure having a cone-shaped member with a central chamber supporting a second container closed by a lid. A splash-proof membrane extends between the inner wall of container and the outer wall of container to protect a second fluid component, e.g. a catalyst from entering the lower chamber of tank. Air is fed to containers and via a regulator, a regulator pipe and through an aperture in the lid. Pressure air feeds the fluid components via tubes to a spray gun, where the components combine to be sprayed.

Abstract: A concrete mixing system includes reservoirs of liquid additives, where the additives are combined with concrete mix to add desired properties thereto. These reservoirs of liquid additive are connected to a storage chamber and a controller which controls and sequences various pumps, valves and sensors to attain the desired quantity of liquid additive for introduction to the concrete mix. The sensors measure pressure in the storage chamber, which the controller correlates to the volume therein for later mixing with the concrete mix. In situations where a back pressure in the chamber is a concern, a sensing tube is employed within the chamber. A differential pressure transducer, which has one sensor within the sensing tube and one sensor within the chamber, accurately determines the pressure and thus the volume received within the storage chamber. A modified sensing tube can also be employed to increase the sensitivity and the accuracy of the pressure measurement within the sensing tube.

Abstract: Method and apparatus for producing a vaporized fuel stream from a liquid fuel in which an inert gas is injected into a pressurized storage container containing the liquid fuel to provide a vaporized fuel stream having a substantially constant pressure, flow rate and composition.

Abstract: A non-venting hazardous material liquid dispensing system (25) includes a removable supply vessel (7) coupled to a gas source (1) and a permanent buffer vessel (11). The permanent buffer vessel (11) is additionally coupled through a suction pump (14) to the removable supply vessel (7). The suction pump (14) suctions pressure off the permanent supply vessel (11), transferring the pressure to removable supply vessel (7). The transfer of pressure causes hazardous material liquid (34) to be drawn from the removable supply vessel (7) into permanent buffer vessel (11). The permanent buffer vessel (11) dispenses hazardous material liquid (34) to a process tool.

Abstract: A highly reliable digital level sensor assembly is provided to replace optical and capacitance type sensors in high purity chemical delivery systems. The digital level sensor assembly is particularly useful in bulk chemical refill delivery systems for high purity chemicals employing a manifold that ensures contamination free operation and canister change outs with a minimum of valves and tubing.

Abstract: A highly reliable digital level sensor assembly is provided to replace optical and capacitance type sensors in high purity chemical delivery systems. The digital level sensor assembly is particularly useful in bulk chemical refill delivery systems for high purity chemicals employing a manifold that ensures contamination free operation and canister change outs with a minimum of valves and tubing.

Abstract: A self-contained fueling module (10) provides the exact amount of hydrazine necessary to fuel a satellite (50) prior to launch. The fueling module (10) includes a propellant tank (14), a vacuum tank (12) and a pressurant tank (16). The propellant tank, filled with hydrazine, is shipped to the launch site where it is installed in the fueling module. Prior to launch, the fueling module is connected to the satellite and the hydrazine is driven with Helium pressurant into the satellite fuel tank. The Helium also pressurizes the satellite fuel tank to flight pressure. Any remaining fuel is evacuated from the connections (45) and fuel transfer lines (42) with the vacuum tank. Personnel do not have to wear self-contained atmospheric pressurized environment (SCAPE) suits because there is no risk of hydrazine exposure.

Abstract: The present invention is directed to an above-ground, explosion-retardant containment vessel for the storage of a flammable liquid. The containment vessel preferably comprises a primary storage tank capable of storing the flammable liquid and a containment dike surrounding the primary storage tank. The containment dike contains any leakage from the primary storage tank within the interstitial space existing between the exterior of the primary storage tank and the interior of the containment dike. An inert gas is preferably located within the interstitial space, and the interstitial space is further substantially free of oxygen. The inert environment retards the explosion of any flammable fluids which may leak into or otherwise be contained within the interstitial space. The containment vessel preferably further comprises a system capable of maintaining the pressure of the inert gas within the interstitial space to at least a predetermined pressure despite temperature variations.

Abstract: A highly reliable digital level sensor assembly is provided to replace optical and capacitance type sensors in high purity chemical delivery systems. The digital level sensor assembly is particularly useful in bulk chemical refill delivery systems for high purity chemicals employing a manifold that ensures contamination free operation and canister change outs with a minimum of valves and tubing.

Abstract: An apparatus is provided for supplying vacuum and compressed air utilities for dental and medical applications. The apparatus comprises a reciprocating piston air compressor for simultaneously producing vacuum pressure at an intake valve thereof and compressed air at an exhaust valve thereof, the vacuum being used to draw air, water vapor, and effluent such as bodily fluids and tissue through a conduit. Effluent and water vapor are separated from the air stream and discharged into a drain. The desired vacuum is maintained by a regulator carried by the compressor. A receiver is also carried by the compressor for receiving and storing the compressed air from the compressor.

Abstract: The present invention relates to a device for regulating the flow of a fluid, the device comprising an inlet receptacle and an outlet receptacle that releases the fluid at a regulated flow rate via an outlet opening, the two receptacles being separated by a common wall. The common wall extends from the bottom walls of the receptacles, and a "bell" contrivance is disposed over the common wall to form on either side of the common wall first and second intermediate receptacles in which a gas pressure is kept constant.

Abstract: A liquid transfer method and apparatus has primary and secondary transfer lines, wherein the primary line carries fluid being moved from a supply container through a transfer assembly to a receiving container, and the secondary line carries pressurized inert gas to substantially purge liquid from the primary line. Pressurized gas is admitted into the system upon actuation of a liquid level sensing float valve in response to the liquid level in the transfer device. The pressurized gas actuates the closure of a valve on the primary line near the receiving container. The pressurized inert gas proceeds to force residual liquid out of the primary lines into the secondary lines and into the receiving container. Manual inspection and valve actuation is used to terminate gas flow and complete the purging process.

Abstract: The device for the inert rendering of a storage container 21, using a cylinder of pressurized inert gas, which has a pressurizing pipe 3 and an inert-rendering pipe 6 which are intended to be connected to the storage container, and an inert-gas intake pipe 4 intended to be connected to the cylinder of inert gas.It comprises a pilot valve 1 and a supply valve 2 controlled by the pilot valve. The control inlet of the said pilot valve 1 is connected to the pressurizing pipe 3; the inlet and the outlet of the supply valve 2 are respectively connected to the inert-gas intake pipe 4 and to the inert-rendering pipe 6.

Abstract: A storage vessel, such as a compartmented vacuum tank or a plurality of vacuum tanks, is connected to a vacuum pump. The vacuum pump is used to produce a vacuum in each compartment of a multi-compartmented vacuum tank or in each tank of a plurality of vacuum tanks such that a suction nozzle extending from each compartment of a compartmented vacuum tank or from each of a plurality of vacuum tanks can remove various operating liquids from fill ports of a salvage vehicle. The liquids are segregated according to type of liquid and fill a compartment of a multi-compartmented vacuum tank or a tank of a plurality of vacuum tanks to a level at which the vacuum to the compartment or tank is terminated by a float valve. During evacuation of the tank compartments or vacuum tanks, fumes drawn off through the vacuum line from the fluids in the compartments or tanks are fed through the vacuum pump to a discharge line and forced towards a vent to the atmosphere.

Abstract: An air volume control valve apparatus is provided for use with a water system pressure tank. The apparatus includes an elongated tube that is supported on the tank with a first end exposed to an area exterior of the tank and a second end within the tank. A valve is provided for controlling the volume of air in the tank. The valve includes an elongated, buoyant float member having a first axial end supported for pivoting movement on the tube about a pivot axis extending in a direction transverse to the length of the tube, and a second free end opposite the first end. As the water level rises in the tank beyond a predetermined level, the float member is lifted on the water to an upper pivoted position in which the second end of the tube is closed off, and when the water level drops beneath the predetermined level, the float member pivots away from the upper position and the second end of the tube is uncovered.

Abstract: An apparatus and method for introducing a predetermined volume of suspension into a reactor from a storage vessel. According to the invention the storage vessel is connected via a first conduit to an intermediate vessel which is in turn connected to a feed vessel via a second conduit, the feed vessel is connected via a third conduit to the reactor, each of the first, second and third conduits, is provided with a shut-off valve, the vessels, conduits and valves being so arranged that the suspension can be transferred by gravity from the storage vessel to the intermediate vessel and from the intermediate vessel to the feed vessel and can be transferred from the feed vessel to the reactor by gravity and/or the effect of pressure difference between the feed vessel and the reactor. The present invention also relates to a process for introducing a predetermined volume of suspension into a reactor using the apparatus.

Abstract: A highly reliable bulk chemical refill system for high purity chemicals is provided. The system employs at least one metallic level sensor in a refillable ampule. The refillable ampule of the present invention comprises a metallic level sensor for sensing a high level or full level in the ampule. The metallic level sensor transmits this signal to a control unit that automatically stops the refilling process. Additionally the refillable ampule includes a low level sensor that either provides an automatic signal for starting the refilling process or an audible or visual alarm to alert an operator that the container is empty and requires refilling. At the same time, the low level sensor sends a signal to the processing equipment indicating the empty state of the ampule.

Abstract: The invention disclosed relates to an apparatus for purging hazardous or volatile materials from external loading lines fixed to the bottom of cargo tank compartments. According to the invention, pressurized gas is directed into each external loading line to force the material to the lowest point in the loading line, through a purging tube, and back into the cargo tank compartment. In one embodiment, the purging apparatus is wholly contained on the cargo tank. In another embodiment, the apparatus is partly contained on the cargo loading facility and partly contained on the cargo tank.

Abstract: A pressure coupling for facilitating connection of an air pump with a water faucet to expel water from water lines connected with the faucet by operation of the air pump. In a preferred embodiment the pressure coupling includes a valve stem threadably seated in a metal cap which threads on the spout of the faucet. The hose of a manual or automatic air pump is threaded on the valve stem to pump air from the air pump into the faucet and through the water pipes connected to the faucet to clear the pipes of water and prevent the pipes from freezing and bursting in freezing weather.

Abstract: A system, device, regulator and process for gas blanketing under precise gas pressure control is provided herein exhibiting extreme pressure sensitivity, position flexibility, smooth gas shutoff, for regulating the pressure of liquid storage vessels having vapor phases therein, and optionally being useful for gas blanketing of other units requiring positive gas pressures therein, such as pressurized rooms, duct, housings, such as computer housing, and the like, at pre-selected pressures of between 0.01 inches of water column and 15 inches of water column, with pressure sensitivities responsive to pressure changes of 0.01 inches of water column within a predetermined pressure set point. The system is compact, self contained, and requires no external source of power other than the supply pressure, which can range from about 10 psig to 1,000 psig. The system, device and regulator are not position sensitive, and may be properly operated in any orientation.

Abstract: The present invention provides improved method and apparatus for the transfer and delivery of very high purity chemicals for use in semiconductor production and similar processes. By employing a series of vessels arranged in parallel, a vacuum system to draw chemical from one or more bulk sources into the vessels, and a pressure system to deliver chemical under pressure from the vessels, chemicals can be easily delivered from any bulk source to one or more end-users. The use of a vacuum system to draw chemicals through sealed conduits eliminates the need for pumps which are a source of both maintenance problems and contamination in the system. Multiple vessels provide for a variety of flow options, which include continuous and uniform chemical delivery to the end-users, recirculation and regular filtration during periods of low use, and built-in redundancy to avoid system shut down if there is a component failure. Computer controlled process systems provides system flexibility and full automation.

Abstract: The invention disclosed relates to a method for purging hazardous or volatile materials from external loading lines fixed to the bottom of cargo tank compartments. According to the invention, pressurized gas is directed into each external loading line to force the material to the lowest point in the loading line, through a purging tube, and back into the cargo tank compartment. In one embodiment, the purging apparatus is wholly contained on the cargo tank. In another embodiment, the apparatus is partly contained on the cargo loading facility and partly contained on the cargo tank.

Abstract: A check valve assembly is provided for a liquid storage vessel, such as a tank. The system includes a housing for mounting to the tank. A fluid outlet and an air inlet are provided in the housing. An inlet check valve and an outlet check valve are provided on the housing for selectively venting the tank. An air filter is mounted over the air inlet to remove airborne contaminants. The check valve assembly may include a pressure gauge, a nitrogen source inlet, and an emergency relief valve.

Abstract: The present invention provides improved method and apparatus for the transfer and delivery of very high purity chemicals for use in semiconductor production and similar processes. By employing a series of vessels arranged in parallel, a vacuum system to draw chemical from one or more bulk sources into the vessels, and a pressure system to deliver chemical under pressure from the vessels, chemicals can be easily delivered from any bulk source to one or more end-users. The use of a vacuum system to draw chemicals through sealed conduits eliminates the need for pumps which are a source of both maintenance problems and contamination in the system. Multiple vessels provide for a variety of flow options, which include continuous and uniform chemical delivery to the end-users, recirculation and regular filtration during periods of low use, and built-in redundancy to avoid system shut down if there is a component failure. Computer controlled process systems provides system flexibility and full automation.

Abstract: A fresh water supply system for an aircraft has at least one supply tank connected to one or more water taps or faucets through a main line, including a device for conveying the water, for example by a pump, by suction, by pressure, or even by gravity. An auxiliary tank or reservoir is arranged near a tap or faucet, and the auxiliary tank is connected to the main line by a controllable valve. The conveying device is connected with a control, which operates in such a way that the main line is filled with water only during first time durations while it is filled with air during second time durations. A venting valve is connected to the main line to permit the venting of the main line when water is removed from the main line. Air also escapes through the venting valve when the main line is being refilled with water.

Abstract: In a liquid storage tank 10 for use on a spacecraft, a transfer apparatus 15 (comprising gathering vanes 33, an elongate array of fins 32, and a sponge structure formed from panels 31) functions to transfer liquid from the inner surface of the tank 10 to the vicinity of an outlet line 40. A screen 23 is disposed between the panels 31 and the outlet line 40. When wetted with liquid, the screen 23 prevents gas and/or vapor in the tank 10 from passing to the outlet line 40. A perforated plate 22 disposed between the screen 23 and the outlet line 40 causes liquid to pass from the tank 10 to the outlet line 40 in a regular and generally unbroken flow.

Abstract: The conduits (1-4) of length L have a linear section S.sub.1 and contain a volumetric flow rate of nitrogen Q such that, to obtain a molar concentration of impurities upon out-gassing less than C.sub.max, Q/S.sub.1 is not less than 9.5.times.10.sup.-9 L/C.sub.max. The conduits are of stainless steel with a low carbon content, not electropolished and/or chemically treated. The joints (6, 7, 9, 11) between the conduits and/or the active members (5) are maintained externally in a neutral protective atmosphere confined in a sealed casing (8, 9 . . . ) Application particularly to electronic industries.

Abstract: Existing devices for controlling flow in water and wastewater treatment systems utilize mechanical valves, adjustable height weirs and gates which are expensive to manufacture and maintain, and in some circumstances such as during winter, difficult to operate. A relatively simple substitute for such devices to control the flow from one zone or area to another includes a casing defining a weir chamber, a submerged weir in the chamber, an inlet on one side of the casing for introducing liquid into the chamber, a liquid outlet from the chamber on the other side of the weir, connected to a second zone or area at a flooded level below the liquid level in the second zone or area, and a duct in the casing for introducing gas under pressure into and out of the chamber for actively controlling the liquid level in the chamber and consequently the flow of liquid over the weir between the inlet and outlet. The use of the above described apparatus involves a novel method of controlling the flow of liquid over a weir.

Abstract: A water supply system for an aircraft is constructed to prevent freeze-up by causing the water to repeatedly flow back and forth between a water supply tank and one or more water displacement tanks. For this purpose, the displacement tank or tanks are connected through a pressurized pipe and through a switch-over valve to a junction between two series connected pressure controllers, preferably closed loop pressure controllers, that connect a source of gas pressure, such as air pressure, to a water tank, which in turn is connected through a water supply pipe to the water displacement containers and to respective faucets. A filling and draining valve is connected to the tank, to the water supply pipe, and to a venting and overflow pipe.

Abstract: Water pumping apparatus is described for use with wells in which on-off cycling in pump operation is minimized by providing an air compressor and compressed air holding tank feeding an pressure regulating valve connected to discharge into a water holding tank, thereby enabling constant pneumatic pressure to be maintained in the water tank without regard to water level in the tank so that each cycling of the water pump will completely fill the water tank from nominally empty condition to nominally full condition.

Abstract: Apparatus is described for controlling the volumes of water and headspace air in a water storage/delivery tank of an individual water well system that includes a pump for maintaining water within the storage/delivery tank and for maintaining the pressure in the tank within preselected limits. The apparatus enables the water level within the tank to be assessed, the air pressure within the tank to be assessed, and the respective volumes of headspace air and water within the tank to be adjusted independently of the pump. Three versions of the apparatus are described: a manually operated system, a semi-automatic system, and a fully automatic system. Use of the apparatus overcomes problems associated with the absorption of the air within the tank and resultant water-logging of the tank. Once this occurs, the pump is caused to switch on and off to an excessive extent.

Abstract: A liquid material reservoir which is used to collect liquid within a liquid or fluid transport system which is purged by means of introducing pressurized gas such as carbon dioxide into the system. As the pressurized gas is introduced into the system, liquid material which is purged from the system is forced into the reservoir, from which it may be reclaimed.

Abstract: A liquid pump, particularly though not exclusively suitable for use in flow injection analysis, and comprising a reservoir 3 an outlet tube 6 for conducting liquid 2 from the reservoir and a device for introducing gas into the liquid in the reservoir to displace liquid therefrom through the tube. The gas may be introduced in the form of a series of rapid pulses of controlled duration and frequency and is introduced at a fixed level relative to the entrance to the outlet tube.

Abstract: An air-oil full hydraulic reservoir tank of the type used with a vehicle lift system. The tank includes a tank wall forming the tank and a discharge pipe within the tank. The discharge pipe includes an inlet tube portion, an outlet tube portion, each extending through an upper portion of the tank, and a connection, such as a connecting loop portion or a passageway in a casting, within a lower portion of the tank, that joins the lower ends of the inlet and outlet tube portions. A low oil control mechanism within the tank blocks the flow of hydraulic oil from the inlet tube portion to the outlet tube portion when the level of the oil is below a predetermined level, thereby preventing the flow of air through the outlet tube. The inlet tube may be perforated, and the low oil control mechanism may be a float within the inlet tube that rests on a valve seat to block the flow of air into the outlet tube. A connecting pipe joins the reservoir tank to a hydraulic lift cylinder, with interposed control valves.

Abstract: The present invention provides improved method and apparatus for the transfer and delivery of very high purity chemicals for use in semiconductor production and similar processes. By employing multiple alternating pressure vessels, chemicals are drawn from virtually any bulk source and delivered to one or more end-users. The use of a vacuum system to draw chemicals through sealed conduits eliminates the need for pumps which are a source of both maintenance problems and contamination in the system. Multiple vessels provide for a variety of flow options, which include continuous chemical delivery to the end-users, recirculation and regular filtration during periods of low use, and built-in redundancy to avoid system shut down if there is a component failure.

Abstract: A proportioner apparatus is capable of proportioning and admixing at least two liquids at relatively low pressures and minimizing waste of the liquids. The proportioner apparatus has a pressurizable reservoir for each liquid and a mix reservoir. The liquid reservoirs define an interior having a lower region. A fluid communication conduit provides fluid communication between the interior of the mix reservoir and the interior of the liquid reservoirs. A run-out conduit provides fluid communication between the lower region of at least one of the liquid reservoirs and the mix reservoir interior. When it is desired to run-out the liquid in the one liquid reservoir fluid flow from the one liquid reservoir through the fluid communication conduit is suspended and fluid flow through the run-out conduit is permitted.

Abstract: The present invention provides an apparatus for controlling the flow of a liquid supplied to a system applying a liquid to a substantially flat surface, the apparatus including a source of pressurized air, an enclosed tank containing a predetermined amount of liquid and connecting with the source of pressurized air through an air line, a pressure reducing valve arranged in the air line and adapted to control the pressure of air to be fed into the enclosed tank, a nozzle connecting with the liquid outlet of the enclosed tank through a liquid supply line and also coupling with the liquid applying system, a two-way valve disposed in the liquid supply line between the enclosed tank and the nozzle and adapted to intermittently blocking the flow of the liquid in the liquid supply line, and a restrictor disposed in the liquid supply line downstream of the two-way valve.

Abstract: A first cup member (4) has (a) a first channel (18) which passes radially from the center of its bottom panel (6) along the inside surface of said bottom panel (6) and substantially axially, upwardly along the inside of its wall(s) (8) and (b) an outlet (16) which communicates with the first channel (18) at a point remote from said bottom panel (6). A second cup member (10) has an opening (20) in its bottom panel (12) at an edge of the bottom panel (12) which communicates with a second channel (22) which passes radially along the outside surface of its bottom panel (12). The second cup member (10) is positionable within the first cup member (4) for moving the opening (20) to the lowest point in the second cup member (10).

Abstract: A low pressure liquid spray gun including a gun body having a spray nozzle, a gas inlet connectable to a pressurized gas source and a reservoir for holding liquid. The gun body includes a material connector for directing the liquid out of the reservoir through the spray nozzle and a gas line for directing the gas from the inlet to the nozzle through the gun body. The gas line includes a control valve, a pressure reducing throttle positioned between the control valve and the nozzle, and a branch line connected with the gas line between the nozzle and the throttle. A pressure regulator is connected to the branch line for maintaining the air pressure in the reservoir.

Abstract: Concentrated sanitizing liquid is stored in a main reservoir coupled directly to a measured reservoir by a check valve so that it automatically refills upon being emptied by air under pressure from a positive pressure cylinder. That cylinder partially fills with swimming pool water being recirculated by a centrifugal pump to produce the pressurized air. A check valve on top of the cylinder is provided to allow the cylinder to fill with air at atmospheric pressure when the pump is turned off, thus relieving the water pressure in the cylinder. A control valve between the measured reservoir and the intake side of the pump controls the rate of flow of liquid sanitizing agent into the recirculated flow of pool water. That rate is so low as to result in drops which are collected in a chamber at the output of the control valve. Suction from the pool pump draws the collected liquid into the pump where it is mixed with recirculated water.

Abstract: An apparatus for cleaning fluid lines is disclosed. This apparatus contains a fluid manifold, a valve, and a line connecting said fluid manifold and said valve. The valve used in the apparatus contains at least two input ports, at least two output ports, means responsive to fluid pressure for closing off the flow of liquid from a first of said ports, and means responsive to fluid pressure for opening the flow of liquid from a second of said ports.