Abstract: An apparatus projects water under pressure to form a screen (1) made of transparent droplets (2) that can reflect rays of light (3) striking the screen by back-projection (4). It includes a substantially vertical dispersal plate (7) that is disposed on the trajectory of the water driven substantially without swirling by a high-pressure pump (8) in a substantially horizontal conduit (9), the end of which is mechanically joined to the dispersal plate (7) and with it defines an upper opening (10) providing an outlet for a vertically oriented sheet of water. The invention is applicable to projection apparatus for sound and light shows.

Abstract: In order to effect thermal spraying of an inner surface at an optimal thermal spray distance depending upon thermal spray conditions, a method for thermal spraying of the inner surface includes the steps of inserting a thermal spray material bending member 3 having an inclined guide plane 8 at its tip face into the opening so as to face a thermal spray gun 1, moving the thermal spray gun 1 and the thermal spray material bending member 3 in synchronization with each other while maintaining the distance between the thermal spray gun 1 and the thermal spray material bending member 3 at a predetermined value and changing the direction of a thermal spray jet 4 jetted straight from the thermal spray gun 1 by the thermal spray material bending member 3 to spray the thermal spray jet 4 on the inner surface of the opening.

Abstract: A method for discharging a fluid, notably an aqueous medicament solution, as a spray of droplets by causing a fluid to flow through a nozzle aperture so that a secondary flow is induced in at least part of the flow of fluid through the nozzle aperture by a flap or orifice lip located within the bore of the nozzle passage, and/or adjacent an end of the nozzle passage, and/or adjacent the nozzle aperture. Preferably a secondary flow at the nozzle orifice is induced such that at least 10% of the fluid flows at an exit angle of 90.degree. to the overall line of travel of the remainder of the fluid.

Abstract: A spray structure with an integral stake useful in spraying water in gardens and related locations can be constructed inexpensively by forming on the top of a stake a spray mechanism including a horizontally extending nipple having an elongated groove leading to a surface which is employed to divert water passing through the groove in the nipple toward a deflecting surfaced which deflects such water outwardly form the stake. The stake preferably includes a flat strip transverse to the orientation of the nipple which aids in preventing tilting of the entire structure when a watering tube is mounted on the nipple.

Abstract: A sprinkler having a nozzle for directing a desired flow of water therefrom wherein the nozzle is mounted in a rotatable nozzle housing. The nozzle has two flow passages therethrough, a primary nozzle passage and a secondary nozzle passage, the flow through the primary nozzle passage being directed therethrough for long range coverage, and the flow through the secondary nozzle passage being staggered, or off-set, for short range coverage.

Abstract: A spray nozzle for spreading soluble and non-soluble substances contained within a canister. An inputted fluid flow is divided into a first partial flow to create a slurry within the canister, and a second partial flow which enters a mixing chamber to, in turn, create a venturi effect drawing into the mixing chamber portions of the slurry. An outlet channel deflector reflects the second partial fluid flow against the bottom surface of a flared nose at an exhaust end of the spray nozzle. A combination of two removable discs provides for conversion between use with soluble and non-soluble particles including grass seed, fertilizer, or the like.

Abstract: A nozzle for use in a steam cooking device having a cooking chamber wherein the nozzle is positioned in a side wall of the cooking chamber, the nozzle comprising a body portion having therein an aperture and having first and second disks positioned on each side of the aperture and wherein steam enters the cooking chamber through the aperture.

Abstract: A hydrotherapy tub massage apparatus comprising a mixing chamber provided by the cooperative disposition of the human body with a surface of the hydrotub. Directional water ejectors for air inducting water ejectors are used to direct a stream of water or water and air essentially coplanar with the surface of the tub and into the chamber which is formed by the cooperative disposition of the human body with the surface of the tub. In one version, a flexible fabric is attached near the source of the ejected water or water and air flow so that it is disposed between the fluid flow and the body which is immersed in the hydrotub. The rapidly flowing water causes an undulation of the fabric in the concomitant massage effect is transmitted to the body.

Abstract: A pair of guide plates or deflectors are secured adjacent the exit of a discharge nozzle body. The body includes a circular inlet portion converging to a flattened, rectangular passageway. The guide plates are secured adjacent the exit of the flattened passageway. As air flow exits from the flattened passageway, the guide plates constrain the flow's natural expansion to the forward and lateral directions only, thereby creating a wide cleaning swath.

Abstract: A sprinkler unit having a continuously rotating nozzle includes a stream interruptor comprising a pin mounted on a carriage pivotally mounted on the nozzle and a cam surrounding the nozzle that has a series of cam surfaces for intermittently caming the carriage assembly and the interrupting pin into the stream to periodically interrupt the stream as the nozzle rotates about its axis to cause a more even distribution of water over the surface area surrounding the sprinkler unit.

Abstract: An electrostatic blade is disclosed having a slot extending the length of the blade and leading from a central duct to an outlet. A surface made of non-conductive material extends in front of the outlet and terminates in a discharge edge which is spaced 0.05 to 4 mm from the slot outlet. In use, liquid is passed from the duct along the slot to the outlet where it collects as a bead. An electrostatic field is applied between the liquid at the slot outlet and the object to be coated which draws liquid along the non-conductive surface in a tapering stream and further causing the liquid to be discharged from the edge. Because the stream of liquid reaching the discharge edge is very thin, very low liquid discharge rates can be achieved while still maintaining a uniform coating on the target object.

Abstract: A material spreader carried by the operator in one hand and operated by the same hand for oscillatory movement includes a hollow hopper, a spring-like carrying and operating handle attached to the hopper wall, and a material distributor mounted on the hopper exterior wall to receive material inertially ejected from the hopper through a gated aperture.

Abstract: A pneumatic spreader and distributor nozzles for the distribution of solid materials is disclosed. The nozzles include a flow chamber having an inlet opening, an outlet opening, and a discharge structure positioned adjacent to the outlet opening. Both the flow chamber and the discharge structure are shaped and dimensioned so as to discharge the materials in a uniform pattern.

Abstract: A powder spray gun for applying particulate powder material onto a surface includes a gun body having a venturi transfer pump which receives air-entrained particulate powder material from a supply conduit and distributes the powder for discharge into a discharge conduit connected to the gun body. A spray head formed with a powder discharge slot is mounted to said discharge conduit. The discharge conduit is formed with a bend, preferably of about 90.degree., to concentrate the powder material along an outer wall formed by the bend for delivery in a concentrated stream to the spray head. A deflector is preferably mounted within the discharge conduit to direct the concentrated powder stream into the spray head in a predetermined manner. The powder discharge slot, which has a predetermined width and is formed by angled side walls meeting at an apex, receives the concentrated powder stream from the discharge conduit and sprays the powder in a wide, uniform spray pattern onto a surface.

Abstract: A spray flushing attachment for vehicle holding tanks, installed during initial manufacture or subsequently installed, is used to effectively and thoroughly clean out a vehicle holding tank, during the emptying of the holding tank. It is positioned in part through a hole in a holding tank end wall and secured from the outside, at a location opposite to the other end wall, in which a standard holding tank drain has been factory installed. When cleaning water under pressure is supplied through a hose to standard PVC pipe fittings attached to the spray flushing attachment, its interior horizontally diverging spray nozzle pointed toward the drain creates a wide spray across the bottom of this vehicle holding tank, which effectively cleans out the tank so no residue remains.

Abstract: A liquid cooling tower has liquid distribution nozzles that spray liquid to be cooled away from the sides of the fill chamber. The spray pattern is restricted to less than about 180.degree.. This prevents liquid from being sprayed out of or on to the tower or from being carried out of or on to the tower by the air flow. The nozzles have a single large liquid discharge opening so that solid objects that flow in with the liquid will not clog them.

Abstract: A conveying and supporting surface is provided with a plurality of coanda effect nozzles for providing a directional film of gas along the surface to support and/or convey a plurality of articles, in indefinite length web, or material along the surface. The directional coanda effect nozzles will produce a conveying film of gas and a film of gas that will produce a suction spaced from the surface to hold the articles closely adjacent the surface while at the same time produce an air bearing to prevent the articles or web material from contacting the surface.

Abstract: An apparatus, method and valve for refrigerating articles with a liquid cryogen that is liquid at low temperatures and converts to a solid and then to a gas at a critical and decreasing pressure. The cryogen is introduced to the refrigerating apparatus through a pipe in which is one or more valves having a valve opening closed by a pressure member that is biased to closed position by pressure that is at least equal to the critical pressure with means for subjecting the member to the cryogen at a pressure that is sufficient to overcome the biasing means and eject the cryogen from the valve. This ejecting pressure is at least equal to the critical pressure for the cryogen which may be liquid carbon dioxide so that the cryogen remains in the liquid state until it leaves the valves in order that it will not set up to a solid within the valve body. The disclosure also includes a method for refrigerating articles and a valve embodying these principles.

Abstract: An improved nozzle apparatus rapidly convertible, while operating, between spray and foam forming modes of operation. An elongate rigid generally cylindrical first conduit member receives surfactant bearing solution at an inlet port thereof and directs the solution under pressure to a spray forming nozzle connected at an outlet port of the first conduit. A second elongate conduit member coaxially slidably overlies the first conduit member and is movable relative thereto between extended and retracted positions. When in its retracted position, the second conduit member exposes the spray-forming nozzle, which is then enabled to direct a spray pattern of the solution longitudinally outward from the apparatus. When in its extended position, the second conduit member encompasses the spray-forming nozzle, and aspirates the spray therefrom with air to form foam which is ejected longitudinally outward from the second conduit member.

Abstract: A flare burner of the ground flare type for incinerating waste combustible gas from refineries and the like is disclosed, for use in populated areas, which has a plurality of waste gas burner heads for simultaneous operation at the same level, which may be utilized as a ground flare or which may, in a modified form, be elevated and provided with a bottom heat shield, which can have additional combustible liquid waste burners in one or more side walls, the flare burner having a combustion chamber with an improved panel construction and a fence of the knock out type to minimize wind effects and to provide an acoustical barrier so that noise transmission horizontally from the lower air inlets is greatly reduced.

Abstract: An improved spraying system for distributing a first fluid having a second fluid entrained therein, the system comprising a pair of fluid reservoirs and an improved proportioner nozzle assembly having a baffle and a deflector to facilitate mixing and directional control.

Abstract: A pressure coating roller gun has a spray nozzle having a spray opening formed in front of the central jet orifice, the opening having a bevel impingement wall. By the use of this nozzle, a coating material is sprayed in the form of a divergent thin film over the coating roller surface. The coating roller preferably has a length corresponding to the width of the divergent thin film of coating material sprayed from the spray nozzle. A spherical coupling member is provided at the proximal end of the spray nozzle so as to allow free adjustment of the direction of spray.

Abstract: A nozzle for coupling a diverter to a hose for the purpose of changing the water stream from the hose into a spray by adjusting the position of the diverter. The nozzle is made out of plastic in one piece and may be connected to a conventional garden hose for selectively converting a solid stream of water into a uniformly distributed thin sheet.

Abstract: A liquid manure spreader having a tank for carrying liquid manure. An auger assembly driven by a power takeoff from a tractor delivers the manure to a pump mounted on the back of the tank. The pump discharges the material through a spreading structure. A valve operated by a hydraulic cylinder controls the flow of manure from the pump to the spreading structure. The spreading structure has a horizontal plate that directs the material in a wide, relatively low spread pattern onto the ground. The tank has a fill hole equipped with a safety grid assembly.