Abstract: A winterizing system (10) for underground sprinkler systems which can be newly installed during the sprinkler system installation, or can be utilized as a retrofit design, having a single valve means (13) and a drive shaft (19) to allow winterization completely from the exterior of building structure (50). Drive shaft (19), which may be flexible for most retrofit installations, is mounted such that it is accessible from the exterior. Upon manipulation of drive shaft (19) inlet port (14) and drain port (16), with connected drain line (24), can be opened and closed by a technician without entrance into building structure (50). Additional features include backflow prevention devices, tamper-proof drive shaft keys, and special connectors.

Abstract: A winterizing system (10) for underground sprinkler systems which can be newly installed during the sprinkler system installation, or can be utilized as a retrofit design, having a single valve means (13) and a drive shaft (19) to allow winterization completely from the exterior of building structure (50). Drive shaft (19), which may be flexible for most retrofit installations, is mounted such that it is accessible from the exterior. Upon manipulation of drive shaft (19) inlet port (14) and drain port (16), with connected drain line (24), can be opened and closed by a technician without entrance into building structure (50). Additional features include backflow prevention devices, tamper-proof drive shaft keys, and special connectors.

Abstract: An improved sulfider is provided for receiving high temperature catalysts from the hydrocarbon cracking operation and subjecting the catalyst to a sulfur-containing gas. The sulfider unit includes a plurality of gas injector tubes each individually removable from the sulfider while gas is continually injected into the sulfider treatment chamber through other of the injection tubes. Each injector tube may extend through a lowermost end of the sulfider, and has a central tube axis arranged substantially vertically when the tube is mounted to the sulfider housing. Fluid output ports are provided in sidewalls of an upper portion of the tube, and the tubes may be continually operated for extended periods of time without significant plugging problems. A service valve and packing unit associated with each injector tube enable partial removal of the tube from the treatment chamber without leakage of hydrogen sulfide gas, followed by closing of the valve and complete removal of the tube and packing unit.

Abstract: A fuel injector is disclosed for injecting fuel into a combustion chamber a gas turbine engine which includes an injector nozzle having a central axis, first and second fuel injection paths in which one of the fuel injection paths supplies fuel to the injector nozzle while the other fuel injection path has an outlet displaced from the axis of the injection nozzle, a single fuel supply conduit which supplies fuel to both of the fuel injection paths, and a metering device which controls the flow of fuel from the single fuel supply conduit to the first and second fuel injection paths. The metering device may be a fuel metering valve assembly which has a piston defining a fuel metering orifice biased against a valve seat around an opening which communicates with the single fuel supply conduit. The piston is biased into engagement with the valve seat by a resilient bellows attached between the piston and a fixed structure.

Abstract: A faucet apparatus includes an ultrasonic transmitter and an ultrasonic receiver provided at a predetermined distance away from each other through a water flow passage. An ultrasonic wave transmitted from the transmitter is propagated through the flow passage as a control signal for operation control of the faucet apparatus and is received with the receiver.

Abstract: A trigger sprayer having a nozzle assembly with a foam-inducing tube in front of its nozzle outlet orifice, an elongated pin having a convex tip for sealing the orifice, a door supporting the pin, and a hinge connecting the door to the nozzle assembly and strategically located to prevent interference between the pin and the tube when the door is swung about its hinge.

Abstract: An ultrasonic nozzle includes an atomizing surface for producing an atomized liquid spray, a liquid-feed passageway for supplying process liquid to the atomizing surface, the passageway having a first-diameter section and a second fluidly connected smaller-diameter section, with a shoulder defined therebetween; an internal shut-off assembly for controlling the supply of process liquid to the atomizing surface, the shut-off assembly including a shut-off rod slidably positioned within the passageway and having a sealing end adapted to cooperate with the shoulder, an actuator piston connected with the opposite end of the shut-off rod and slidable within a cylinder bore which is in fluid communication with the passageway, and a valve actuator for slidably moving the piston and shut-off rod in the passageway between a first closed position and a second open position, by which operation the supply of liquid to the atomizing surface is controlled.

Abstract: A problem which arises with dispensers for semi-liquid substances lies in there being an outlet channel which is permanently in communication with ambient air. After first use of the dispenser, the corresponding dead volume is filled with semi-liquid substance which quickly becomes spoiled; thereby making subsequent utilization at least difficult and possibly toxic or even impossible. The present invention avoids this difficulty by means of a pushbutton in which the outlet channel is defined by co-operation between a flexible part and a rigid part. The outlet channel extends essentially radially and its volume is reduced when the user applies axial pressure on the pushbutton. A motion transforming system for transforming axial displacement into radial displacement serves simultaneously to retract a plunger received in the outlet channel, thereby disengaging the delivery orifice of the pushbutton.

Abstract: An improved method for cleaning or purging of automated spray painting or coating equipment is disclosed which significantly reduces the solvent and time required to change from one color or coating material to another. The method of the present invention utilizes a ratio mixing valve to intermix a compressed gas such as air and a liquid solvent in a predetermined ratio which is then passed through the manifolds and supply lines of the painting or coating equipment to effect a thorough and complete cleaning thereof thus readying the equipment for use of the next paint color or coating material.

Abstract: A solenoid-controlled fuel injection device, particularly useful for injecting non-Newtonian types of fuel materials, such as coal slurry, to a preburn chamber of an internal combustion engine, comprises a wet-type solenoid unit and a vortex valve unit integrated together in a modular configuration. The solenoid unit contains a magnetic coil surrounding a coaxial control fluid-sealing bore through which a cylindrical armature is translated. The armature has a coaxial armature stem which is engaged by the valve stem of the vortex valve unit. The vortex valve stem is supported on a compression spring within the longitudinal bore of a valve body, coaxial with the bore of the solenoid unit and engages a poppet valve seat adjacent to a vortex valve element. A control fluid supply inlet is coupled to the longitudinal bore, while a fuel supply bore is coupled to a fuel input port to the vortex chamber of the vortex valve.

Abstract: A manually operable two stage valve assembly, in fluid communication with a source of fluid under pressure, regulates the discharge of a fluid through a nozzle to one of two predetermined flow rates. Upon independent actuation, the first stage permits a high flow rate and the second stage permits a low flow rate.

Abstract: A spray gun having a trigger lever operated supply valve which includes a reciprocating hollow valve sleeve and a free floating spherical valve element to close the hollow in the reciprocating valve sleeve when the valve sleeve is in its closed position. The free floating spherical valve element and the valve sleeve are located in a chamber which has at least two exit ports spaced from one another at a distance in excess of the diameter of the spherical valve element. End areas of the valve sleeve are equal and subject to the pressure of the material flowing through the valve in its open position to provide a balanced force on the valve sleeve when the valve is open and to help a bias spring to hold the valve in the closed position.

Abstract: An irrigation system having a valve assembly which is attachable to the underside of a sprinkler head is disclosed. The valve assembly includes a housing having interior walls which define an inner chamber, an inlet in fluid communication with the inner chamber, an outlet in fluid communication with the inner chamber and a valve seat surrounding the entrance of the outlet. The valve assembly further includes a flexible diaphragm which extends across the inner chamber and is attached to the interior walls of the housing so that it divides the inner chamber into an upper chamber and a lower chamber wherein the upper chamber is in fluid communication with the inlet and the outlet. The valve assembly further includes valve closing structure located in the upper chamber and attached to the diaphragm for opening and closing the valve to control fluid flow through the valve.

Abstract: A device for controlling the quantity of a medium, such as paint, lacquer or adhesive emerging from a discharge nozzle of an equipment, such as a spray gun, which device includes a delivery chamber extending between the discharge nozzle and a pump housing which has a pump chamber connected at one end by an outlet valve to the delivery chamber and receives a reciprocating pump piston, with the delivery chamber including a control arrangement that will adjust the quantity of the medium flowing through the discharge nozzle and also prevent a dribble from the end of the nozzle during a return stroke of the pump piston.

Abstract: A hot-melt adhesive dispenser having a multi-orifice nozzle manifold in surface-to-surface heat transfer engagement with a heated member. A first sealing element cooperates with a second sealing element to provide a heated member-to-nozzle manifold engagement which is sufficiently inelastic to inhibit adhesive drool between applications, is leak-resistant, and is unlikely to produce air pockets. The first sealing element is a hollow tapered stem having a base which receives adhesive going from within said heated member. The dimensionally reduced tip of the tapered stem is press fit into an inlet bore of the nozzle manifold for fluid communication with a plurality of nozzles. The second sealing element is a high temperature O-ring seated on that portion of the tapered stem not received within the inlet bore. The tapered stem forms a relatively inelastic fit, while the O-ring provides a relatively elastic fit.

Abstract: A flow control device, such as a valve, has a body with two portions which define two valve chambers, an inlet, which is coupled to a source of pressurized fluid and which opens into one of the valve chambers, and an outlet coupled to downstream devices, such as sprinkler heads, and which opens into the other valve chamber. A piece of collapsible tubing couples the two valve chambers. A shaft extends into the valve and is provided with a mechanism for pinching the collapsible tubing shut which causes the collapsible tubing to collapse due to the pressure exerted on its exterior by the pressurized fluid surrounding it. A coil spring is attached to the shaft and the valve body. When the valve is closed, i.e., the collapsible tubing collapsed, the coil spring is biased to cause the shaft to rotate if released. The shaft is prevented from rotating by a fusible link. When the temperature to which the valve is exposed reaches or exceeds a predetermined temperature, the fusible link melts.

Abstract: A shower apparatus for controlling water that is being expelled from a showerhead under pressure. A water conduit couples from a pressurized water pipe adjacent to the showerhead and connects to a mat which the user steps upon. The water conduit includes a mat conduit which the user steps upon. The water conduit includes a mat conduit having an actuating or switching means operable by foot pressure from the user to selectively restrict water flow at the showerhead.

Abstract: An ultrasonic nozzle includes an atomizing surface for producing an atomized liquid spray; a liquid-feed passageway for supplying the process liquid to the atomizing surface, the passageway having a first diameter section and a second fluidly connected smaller diameter section, with a shoulder defined therebetween; an internal shut-off assembly for preventing the supply of process liquid to the atomizing surface, the shut-off assembly including a shut-off rod slidably positioned within the passageway and having a sealing end adapted to cooperate with the shoulder to prevent the supply of process liquid to the atomizing surface, an actuator piston connected with the opposite end of the shut-off rod and slidable within a cylinder bore that is in fluid communication with the passageway, and a valve actuator for slidably moving the piston and shut-off rod in the passageway between a first closed position in which the supply of liquid to the atomizing surface is prevented and a second open position in which the su

Abstract: A surface, subsurface continuous feed moisture maintenance system for microscopic volume irrigation utilizing a preset flow rate valve, provided in a single preset flow rate stage or multiple preset flow rate stages, a moisture actuated sensor valve and a plurality of permeating, moisture distribution tubes. The preset flow rate valves are selected and set according to plant moisture needs in the geographical area being irrigated. The moisture actuated sensor valve gradually opens or closes water flow to the system according to soil moisture level conditions and thus prevents over watering and conserves on water resources. The moisture permeating action of the distribution tubes complement the preset flow rate of the valve and the moisture actuated sensor valve to maintain the subsurface at a constant moisture level.

Abstract: A method of spraying fiber-containing fluids that results in smoother, more uniform coatings. The method comprises displacing a fiber-containing fluid through a nozzle assembly at about 69 KPa to about 386 KPa. The fibers have a length of about 1 mm to about 6 mm. The nozzle assembly comprises a nozzle extension, an elbow joint, and a nozzle in series communication through at least two hollow fluid passages. A first fluid passage exits at a first nozzle outlet having a diameter of about 2.5 mm to about 3.5 mm. A second gas passage exits at a second nozzle outlet and directs a gas at the fiber-containing fluid to atomize the fluid. Control means are disposed upstream of the nozzle assembly for controlling the fiber-containing fluid flow and the gas flow.

Abstract: The present invention provides a means for generating and controllably terminating a laminar flow stream of fluid to give the effect of slicing the output stream perpendicularly to its longitudinal axis. The diverting means of the present invention is formed as a unitary assembly with a laminar output nozzle, and is disposed in a water tight tank coupled to the laminar flow nozzle. For diversion of the laminar flow stream, a continuous flow of water is controllably diverted by an electrically controlled solenoid valve into the path of the laminar flow stream. This diverting stream diverts the direction of the output flow so that it is captured within the tank and merely allowed to drain therefrom. By providing the diverter as an integrated assembly with the laminar flow nozzle, the diverter may be adjusted one time, and thereafter may be disassembled, reassembled, etc., without requiring further adjustment.

Abstract: Arrangement for controlling and regulating a liquid (2) flowing through a line (3). The arrangement comprises a valve body (9) provided with a press-on or deforming element (11) moveable along the line and designed to cooperate with the said line for regulating the flow of the liquid (2), by means of restriction thereof to varying degrees. In the line (3) there is fitted a continuous hollow element (4) having a number of openings (8) through which the said liquid can flow. The press-on element (11) moveable along the hollow element (4) is designed to press the line (3) against the said element (4). By this means a shifting of the press-on element can be carried out such that an optional area of the openings can be uncovered for throughflow since that part of the hollow element where the said area is located is situated on the outlet side in relation to the press-on element.

Abstract: A butterfly valve provided within a disconnect of a fluid flow line, such as in a fuel dispensing system, incorporating a pair of decoupling members, at least one or a pair of butterfly valves mounted within and in proximity with location for disconnection of the conduit, the butterfly valve incorporating a valve disk held by a retainer and which is spring biased for snapping into closure against its valve seat, when disconnection occurs, to prevent the further flow of fuel from the conduit, or in the instance where a pair of the butterfly valves of this design, are incorporated proximate each of the disconnect members, upon severance of the conduit or hose at this location, effecting an immediate closure of both butterfly valves, preventing the discharge of any further fluid from the remaining separated parts of the fluid conduit.

Abstract: A metal flake grease having malleable metal flakes and an injector gun comprising an adjustable nozzle specially designed to allow metal flake grease to a grease fitting joint and into a worn area between inner and outer portions of the joint to become bonded thereto and form a new lining therein for extending life of the joint.

Abstract: A foamaking generator for use on fires and hazardous material spill control, having a nozzle that may be adjusted to direct a foam concentrate stream to cover variable amounts of area of a screen so that low, medium and high expansion ratio foams can be produced using one foam generator.

Abstract: A butterfly valve provided within a disconnect of a fluid flow line, such as in a fuel dispensing system, incorporating a pair of decoupling members, at least one or a pair of butterfly valves mounted within and in proximity with location for disconnection of the conduit, the butterfly valve incorporating a valve disk held by a retainer and which is spring biased for snapping into closure against its valve seat, when disconnection occurs, to prevent the further flow of fuel from the conduit, or in the instance where a pair of the butterfly valves of this design, are incorporated proximate each of the disconnect members, upon severance of the conduit or hose at this location, effecting an immediate closure of both butterfly valves, preventing the discharge of any further fluid from the remaining separated parts of the fluid conduit.

Abstract: The invention relates to a nozzle for a paint spraying device having a radially inward valve needle that is connected in a coaxial arrangement with the nozzle. A radially outward paint supply pipe is connected to the valve at one end and a paint source at the other. The valve needle is hollow for paint supply purposes and has a forwardly inclined bore in its tip which opens axially in front of the valve into an annular chamber created between the valve needle and the supply pipe.

Abstract: A valved flow control dispenser including a slot nozzle through which molten thermoplastic material is dispensed onto a substrate. The slot nozzle includes a nozzle body within which there is a transverse cylindrical bore, which bore is intersected by two spaced radial openings. One of these openings is in fluid communication with a pressurized source of molten thermoplastic material, and the other opening is in fluid communication with a slotted discharge opening of the nozzle. A cylindrical flow control member having a groove provided in its exterior surface is rotatably mounted within the bore. This groove is of varying width and provides a flow path for molten thermoplastic material between the openings in the bore. By varying the rotatable orientation of the cylinder relative to the openings, the width of molten material dispensed from the slotted discharge openings of the nozzle may be varied.

Abstract: An apparatus for applying liquid to mill rolls has a bar with two longitudinally extending manifolds. Into the bar are inserted spray nozzles and associated diaphgragm valve structures. One of the manifolds is for the supply of coolant and/or lubricating fluid to the nozzles via the valves. The other manifold has a control fluid (air) under pressure which is used to operate the diaphragm valves to connect or disconnect the supply of coolant/lubricant. To control the control fluid each diaphragm valve unit has a solenoid operated valve for selectively connecting the air at pressure in the second manifold to the diaphragm valve.

Abstract: A hand-operated sprayer has a spray head for attachment to a container for liquid. The spray head includes a manually-operable valve for controlling the discharge of liquid from an inlet in the head to a discharge nozzle. The sprayer includes a spring urging the valve into a closed position and a manually-operable member mounted on the head, which can be moved against the spring-loading to urge the valve into an open position. The valve comprises a spool having a passage providing communication between the inlet and the discharge nozzle, and the spray head valve spool-valve spool bore assembly has a radial inlet port located between a fixed, valve spool seating component, and an annular valve spool seal component which prevents external leakage.

Abstract: There is provided a rotary flow control balancing valve and an integral predistribution box for use with gravity feed cross-flow cooling towers. The valve and predistribution box provide for the balancing of flows between halves of a cross-flow cooling tower or between or among separate cooling towers and also for maximizing the uniformity of the hot water flow in the predistribution pan and the distribution pan.

Abstract: The invention relates to a high-pressure liquid installation with a pressurized water generator (10) to which a spraying device (42) is connected, while an adjustable pressure-limiting valve (14) is arranged between the pressurized water generator (10) and the spraying device (42). The pressure-limiting valve (14) is adjustable in its pressure by remote operation by electrical signals which can be generated by electrical control elements (56, 58), while a delay device (40) may be provided for surge-free pressure adjustment.

Abstract: An aerating shower head is provided wherein the discharge rate is very low yet gives the user the illusion and feeling that he is showering with a full flow of water. In accordance with one embodiment, the head is provided with a valve, so that the pressure to the head can be reduced or even shut off.

Abstract: Disclosed is an improved fluid spray-forming device or showerhead which is energy efficient and produces a high fluid velocity and a forceful spray. The device has a relatively large, substantially cylindrical chamber between a restricted input flow path and a spray-forming disk. This combination changes the fluid flow properties to achieve the improved results. A pulsating spray can be obtained by proper selection of the ratios of the input, chamber and output diameters, thus making a mechanical fluid interrupter unnecessary.

Abstract: A sprinkler or water circulating system having a selected number of sprinkler heads, bubblers or the like, each having an associated valve mechanism adapted to effect valve closure upon displacement of the sprinkler head, bubbler, etc., during water flow thereby preventing loss of sprinkler effect and fluid. A normally open spring loaded valve is positioned in a conduit to which the sprinkler head or the like is attached. A stem or rod is positioned in engagement between sprinkler head and valve so that upon displacement the stem may be broken off if of frangible material, or otherwise displaced and the valve is urged into closed position. Upon replacement of the sprinkler head or the like in proper position the rod is replaced to maintain the valve in open position.

Abstract: An add-on bidet includes a moulded plastic seat (12) which has a channel-shaped cross-section. A pivoting spray-arm (108) is stowed between the toilet-bowl rim and the inside of the channel. The inner wall (16) of the seat acts as a splash guard. The spray-arm is mounted in bearings (214,102) which are formed in the walls (16,18) of the seat. The seat is able to pivot, for raising, on a pair of stubby pivot pins (36,38) widely spaced apart. One (38) is hollow, to convey water to the seat. There are no exposed hose pipes or other obtrusive components. The water control knobs (70,71,76) are accessibly located. Water leaves the spray-head (116) as a coherent tube of water, which gives rise to a soft, gentle stream, whether the flow volume is large or small. This is achieved by deflecting jets of water from nozzles so that the jets coalesce back into a stream.

Abstract: An improved supply/shut-off valve for use in a multiple-user gas system wherein the valve is located in the gas supply line of each user, for the purpose of preventing pressure increases and decreases in the gas supply to each of the users when any of the other users is either added to or deleted from the multiple-user gas system.

Abstract: An adjustable valve incorporated into a faucet or shower head which is manually manipulatable in order to control water flow at the faucet or shower head with the adjustable valve including interchangeable components to enable the faucet and shower head to be provided with an aerator or jet spray arrangement and enabling the components to be assembled in a manner which will reduce the number of different components necessary to assemble either a faucet or shower head which includes an adjustable valve therein. The adjustable valve includes a rotatably supported crown or shower head bell which can be manually rotated to adjust the valve with the valve itself including a restrictor having orifices therein and a valve plate having flat surfaces and a cavity associated with a central opening to enable control of flow through the orifices.

Abstract: A shower head is disclosed of the type having a pivotally mounted spray head. The shower head comprises a first member adapted for attachment to a water supply pipe and a spray head pivotally mounted to the first member. The first member includes a concave, socket-defining surface with a water supply aperture therein. The spray head has an inner spray body, through which the water flows, and an outer retaining sleeve, which secures the spray body to the first member. To prevent leakage between the spray body and the sleeve, an annular seal is carried by the spray body and slidably engages the concave surface of the first member along a line which encloses the water supply aperture at all pivot positions of the spray head. In the preferred embodiment, the inlet end of the spray body defines a flow-limiting vortex chamber, into which water is directed in a swirling action.

Abstract: An apparatus for supplying fluid under pressure, such as compressed air, to movable using devices, includes a feed line having tap points spaced along it, with a tap valve at each tap point. A connection unit for connecting the feed line to the user is movable along the feed line and can receive fluid at any tap point. As the connection unit slides into place at the tap point, the tap valve automatically opens to supply fluid. Each valve has a rotary or slide-type valve member movable between open and closed positions, which is always exposed to equal fluid pressure all about it so as to require only a small force to actuate the valve. The valve member is tubular and open-ended and extends parallel to the feed line. Both mechanical and magnetic means for actuating the valve member are disclosed.

Abstract: An improved valve, and assembly incorporating the valve, which finds particular use in welding and cutting torch control applications. The valve comprises a quick, slide-actuated, on-off control which dispenses with the need to adjust the flow of gases to the torch each time flame start-up is required. The valve also incorporates a variable pilot setting which includes an easily-manipulated cam-adjustment.

Abstract: In a high pressure fluid system for providing fluid to a hand held nozzle, an improved power assisted dump valve which may be remotely located and controlled. The dump valve includes a stepped piston positioned in a stepped bore with one end of the piston adapted for sealing off a pressure relief outlet. A fluid conduit, preferably a passageway through the piston, conducts high pressure fluid to the valve chamber at the large diameter end of the piston. A control valve either seals off the large diameter end of the chamber or vents it to ambient pressure so that differential pressure supplied by the working fluid itself drives the valve piston to its open or closed positions. An electrical, hydraulic, or mechanical actuator operates the control valve, remotely if desired, to control the flow of high pressure fluid to the nozzle.

Abstract: A simplified device which dispenses accurate amounts of pressurized fluid, such as a liquid adhesive, upon application of force, e.g., finger pressure, upon a lever means which causes at least partial release of clamp pressure upon a tube carrying the fluid.

Abstract: A mist generator capable of attachment to a garden hose having a throttling valve for controlling the volume of water discharged and a nozzle including a wedge shaped opening defining an angular surface against which the water discharged will impact to cause the water to break into a mist of tiny droplets having low impact capabilities.

Abstract: A multiple nozzle head for use on jet pipes or guns particularly adapted for cleaning equipment. A contactless change-over device is provided on the end of the jet pipe, which change-over device has a sealing element movable therein. The change-over device has an inlet port and at least two outlet ports with the sealing element being movable between the outlet ports. By orienting the jet pipe in a specific position, with the liquid turned off, the sealing element is gravitationally moved to a desired location so that when the liquid supply is turned on again, the sealing element will be held in the adjusted position by the liquid pressure.

Abstract: An irrigation device with variable flow control which is arranged to give either a drip feed through an elongated helical channel or a sprinkler feed through a direct outlet to a sprinkler and acts as a valve to shut off flow also by turning a key within a body to locate relevant passages.

Abstract: An improvement on a ball valve for use in detachably connecting a riser pipe to an irrigation lateral. The novel valve has a throat operatively connected to the outlet end of the valve. The throat receives a valve trigger tube which has spaced fingers extending longitudinally from the end of the pipe to engage the ball, thereby forming apertures between the fingers which serve as a strainer to prevent the passage of foreign objects and which can be sized to regulate the flow of water. When the tube is withdrawn the flow of the water through the then open end of the tube generates a self-cleaning action.

Abstract: Improved apparatus for use in distributing anhydrous ammonia for agricultural applications, including a compact, convenient assembly combining in a single portable unit a flow meter, a control valve, a rotary fluid motor, an ammonia input, and means for mounting the assembly on any available application implement for connection to the ammonia source, the ammonia applicators, and the power fluid from a towing tractor.

Abstract: A sprinkler for watering an area having a specific shape using water subject to an intermittent and regular variation in pressure introduced against a patterned plate positioned in the base of the sprinkler. The plate is situated adjacent to a slotted opening in the lower solid side of a hollow head moveable under water pressure within a cavity formed between the base and a cap of the sprinkler. A nozzle is attached to the upper end of the head to distribute the water passing the restricting window and segment of pattern disposed in its path in the base. Springs are associated with the head to provide a torque to the sprinkler head as the head rises in the cavity under pressure of the water on the lower side of the head. A gear and ratchet is provided on the head to prevent the head from returning to the first position upon reduction of the water pressure and resultant reaction of the springs to return the head to its position of rest within the cavity.

Abstract: Apparatus for ejecting a mixture of liquids, e.g. urethane foam, comprises a cylindrical chamber into which the liquids are separately introduced under pressure and mixed and ejected from the open end of the chamber. A reciprocable plunger alternately exposes the inlets in its rear portion and seals the inlets from each other and purges the chamber in its forward position. The inlets are axially spaced apart and separated from each other by a throat that has interference fit with the plunger in the forward position of the plunger, the plunger having for this purpose an elastic deformable surface.