Abstract: A self-cleaning spray nozzle in which a standard fitting serves as the nozzle body. A unitary valve assembly is inserted partially into the fitting and secured to it. The valve assembly includes a secured valve seat biased by a spring into a spraying head so that the valve seat and spraying head form a seal. The spraying head is designed so that it does not form a complete seal with the valve seat, the gap in the seal defining a metering orifice so that under normal fluid pressures, fluid will spray out of the orifice in a predetermined pattern. When a force sufficient to overcome the spring bias is applied to the spraying head, the spraying head separates from the valve seat breaking the seal and allowing the fluid to flush the outlet. The force can either be applied manually, or caused by an increase in fluid pressure. An optional deflection collar may be snapped onto the nozzle for influencing the direction of the spray.

Abstract: A quick disconnect nozzle assembly comprising a nozzle body, a spray tip, and an annular sealing member interposed therebetween. The nozzle body and spray tip have inclined seal engaging surfaces that compress the annular sealing member at three distinct points for exerting both axial and radial pressures thereon, and the body and spray tip have cams and separate radial detents for smoothly drawing the tip and body together into sealing engagement with the annular sealing member in repsonse to tip rotation and without the necessity for overcompressing the sealing member. A secondary, external sealing member is provided, which together with the internal sealing member, seal the cams and detents in an internal chamber area isolated from the liquid sprayed by the nozzle.

Abstract: A spray nozzle assembly having a spray tip formed with an elongated, axially extending cylindrical chamber communicating with the liquid supply and being formed with a cross slot which intersects the chamber at a location intermediate the ends thereof for defining a discharge orifice, a deflection surface on a downstream side of the discharge orifice for directing liquid in a direction transversed to the axis of the chamber, and a pocket extending downstream of the deflector surface a distance significantly greater than the diameter of the chamber.

Abstract: A hand-held spray gun including a handle section, a barrel section mounted forwardly of the handle section, and a nozzle section mounted forwardly of the barrel section. The handle section has a liquid inlet at a rearward end thereof and is adapted to direct pressurized liquid in a straight longitudinal path through a relatively inexpensive plastic tube which functions both as a liquid conduit and as a mechanism for moving a valve follower of the gun between open and closed conditions in response to actuation of a trigger. The handle section further has a pressurized air inlet which communicates with the nozzle section through an air passageway defined between the liquid conduit tube and a barrel section housing for facilitating liquid atomization of the spray discharge.

Abstract: A spray nozzle assembly particularly adapted for directing a finely atomized slurry of hydrated lime for removing sulfur dioxide from flue gases. The nozzle assembly includes a nozzle body having a first pre-atomizing and mixing chamber into which pressurized liquid and air flow streams are directed for breaking down and pre-atomizing the liquid, an orifice plate at the downstream end of the first pre-atomization and mixing chamber for restricting the fluid flow into a second chamber defined by the orifice plate and spray tip, and a spray tip having a plurality of circumferentially spaced discharge orifices through which atomized liquid particles in the second chamber discharge in a substantially conical cloud-like spray pattern of finely atomized particles.

Abstract: A spray gun for dispersing pressurized liquids having a barrel portion and a handle portion, a relatively simple and compactly designed control valve in the lower end of the handle portion, and a trigger pivotably mounted and adjacent the lower end of the handle portion and extending upwardly therefrom for movement between control valve actuating and deactuating positions. The control valve has a valve body formed with three mutually perpendicular passageways and contains a valve member having a valve stem extending outwardly in generally perpendicular relation to the handle for engagement by the lower end portion of the trigger. A simple transversely moveable locking element is provided for securing the trigger in a deactuated position.

Abstract: A full cone spray nozzle assembly having a body with a centrally disposed, axially extending chamber through which a liquid to be discharged will flow, and a frusto-conically formed end cap having a circular, centrally located discharge opening. The end cap covers the body at the discharge end thereof, and the body has passages to direct pressurized air into a cavity formed between the discharge end of the body and the adjacent interior surface of the conical cap, thus forming an air outlet in the shape of an annular slot. The slot is arranged to direct the pressurized air inwardly towards the center of the opening in the conical cap so that the pressurized air surrounds and impinges the liquid flowing from the orifice and atomizes the liquid discharge.

Abstract: An improved spray nozzle assembly particularly adapted for use in dispersing cooling fluids onto the opposed relatively narrow sides of a pair of slabs in a split or twin cast continuous steel casting system. The discharging spray nozzle assembly is fashioned with a nozzle body having a manifold which is common to a plurality of transversely mounted spray nozzle heads. Each spray nozzle head has a plurality of closely spaced, slit-like discharge openings that communicate with the manifold via a barrel-like mixing chamber and internal flow passages, Each of the discharge openings on each of said spray nozzle heads has a specifically configured shape to facilitate an even distribution of coolant throughout a substantially rectangular spray pattern.

Abstract: A clamping arrangement for quickly and easily mounting a spray nozzle on a support boom in predetermined orientation without the necessity for handling of separate fasteners and without disassembly of the nozzle. The clamping arrangement includes a pair of clamping elements that each have first cooperating portions for positioning about opposed sides of the support boom and second cooperating portions for positioning about opposed sides of the nozzle, and at least one of the clamping elements carries a fastener that is engageable with the other clamping element for securing the elements in mounted position on the boom with the nozzle captively held therein. The nozzle and clamping elements cooperate to both angularly and vertically orient the nozzle in relatively precise predetermined relation to the boom as an incident to such mounting.

Abstract: A spray nozzle in which a nozzle body is formed with an elongated chamber having an air inlet port communicating with the side of the chamber, a liquid inlet port communicating with one end of the chamber, and a nozzle tip communicating with the opposite end of the chamber. The spray nozzle may be operated in a hydraulic or non-air assisted mode and with a relatively high flow rate by closing off the air inlet port and causing liquid to stream directly from the liquid inlet port to the nozzle tip. The nozzle also may be converted to an air assisted mode in which a stream of pressurized air is injected into the air inlet port and impinges transversely against the liquid stream to preliminarily break up or preatomize the liquid before the liquid is discharged from the nozzle tip. The conversion is effected by placing into the nozzle body an insert for reducing the flow rate of the liquid stream and for causing the air and liquid streams to interact to effect preatomization of the liquid.

Abstract: A spray nozzle assembly including a hollow nozzle body having an air inlet orifice through which a pressurized air stream is directed into the body, a liquid inlet orifice through which a pressurized liquid flow stream is directed into the body, an impingement member disposed within the body for breaking up the liquid and air flow streams and preatomizing the liquid, and a nozzle tip mounted at the discharge end of the body defining a discharge orifice. The nozzle tip is formed with a deflector flange downstream of the discharge orifice in transverse relation to the direction of travel of the preatomized liquid passing through the discharge orifice and the deflector flange is formed with a cup shaped recess in axial alignment with the discharge orifice into which the preatomized liquid is directed from the discharge orifice for causing further breakdown and atomization of the liquid which is thereupon directed by the deflector flange transversely in a substantially flat spray pattern.

Abstract: A gun is provided for repeatedly dispensing precisely metered quantities of liquid from a pressurized source. The gun includes a valve spool axially slidable within a valve chamber and having at least first and second blocking members for blocking the inlet and outlet ports of the valve chamber. An actuating member associated with the gun is responsive to a unidirectional force to impart relative axial sliding movement of the blocking members in the valve chamber.

Abstract: A quick disconnect nozzle assembly having a nozzle body, an annular sealing member and a nozzle tip with a socket in the body for receiving the tip and having a pair of chord-like lugs with upstream facing camming surfaces for engaging downstream facing camming recesses in a pair of radially extending shoulders on the nozzle tip to cam the tip axially into sealing engagement with the annular sealing member as the nozzle tip is inserted in the socket and rotated therein. Preferably the socket includes diametrically opposed lugs and the tip has a pair of cooperating shoulders and recesses and at least one radially extending stop adapted to engage an abutment in the base of the socket when the tip is rotated into proper position. The tip may include a swirl imparting vane and have an outer protective sleeve with longitudinal ribs to facilitate rotating the tip by hand.

Abstract: A spraying system having a plurality of separate pressurized fluid supply sources, a spray gun having a discharge nozzle and a plurality of fluid inlet ports corresponding to the number of supply sources and each communicating with the discharge nozzle, lines coupling each supply source to a respective one of the inlet ports, and a selectively operable discharge control associated with the spray gun for permitting passage of fluid through the discharge nozzle from any one of the plurality of supply sources, for enabling the simultaneous passage of fluids through the nozzle from a plurality of the supply sources, and for preventing the passage of fluids through the nozzle from all of the supply sources. The discharge control includes an individual spring biased valve assembly in each inlet port and a single control lever that is movable between an operative position for actuating selective of the valve assemblies and an inoperative position in which none of the valve assemblies are actuated.

Abstract: A spray nozzle for producing a hollow conical liquid spray having a body formed with a cylindrical whirl chamber having a tangentially disposed liquid inlet passage and an orifice cap removably mountable at the end of the whirl chamber formed with a spray discharge orifice of the desired configuration. The nozzle body includes an upstanding post concentrically disposed within the whirl chamber for guiding pressurized liquid in a tangential direction about the whirl chamber, and the post has a recessed upper end for receiving the air core of whirling liquid within the chamber to retain the proper axial position of the air core and to prevent air core damage to the nozzle body.

Abstract: An improved diaphragm-type antidrip valve including a valve body defining an annular valve chamber having a fluid inlet and an axial fluid outlet defined by a centrally located valve tube with a diaphragm element having its peripheral portion held in sealing engagement against the outer end of the valve chamber by an end cap and its front face disposed for sealing engagement with the open end of the valve tube, wherein the diaphragm is formed with a centrally located button projecting axially from its rear face and received and radially supported in a socket in a valve follower slidably mounted in the end cap and biased towards closed position by a compression spring and the end cap including an annular contoured ramp presenting a concave seat adjacent the effective outer periphery of the diaphragm for radially and axially supporting the diaphragm in its open position.

Abstract: A dual purpose nozzle for low pressure foam generating and high pressure fluid spraying including a nozzle body having inlet and outlet portions and defining a slide chamber and a mixing chamber, an inner nozzle is slidably mounted in the slide chamber and having an internal passageway for communicating fluid from the inlet portion to the outlet portion of the nozzle body, the mixing chamber terminating in an outlet discharge opening and the nozzle body having at least one inlet opening therein upstream of the outlet discharge opening for admitting air into the mixing chamber, the inner nozzle having a discharge end with a primary discharge opening therein generally aligned with the outlet discharge opening in the nozzle body, a spring is provided for biasing the inner nozzle in an upstream direction with the discharge end normally disposed above the air opening in the mixing chamber so that low pressure fluid entering the mixing chamber from the passageway draws air in through the air openings to generate a

Abstract: An air atomizing spray nozzle for spraying a viscous liquid carrier at relatively low flow rates for agricultural and industrial applications. The nozzle comprises a hollow body with a liquid passage for receiving pressurized liquid from an external source, an air duct for receiving low pressure air from another external source, and a nozzle tip assembly. The latter includes a liquid spray tip connected to the liquid passage and having an elliptical discharge orifice formed by the intersection of a radiused end orifice bore and a cross slot communicating with the liquid passage; an air cap connected to the air duct and having a pair of diametrically opposed air nozzles straddling the liquid spray tip, each air nozzle having an outwardly diverging flat face with an oblong air orifice communicating with the air duct. Each air orifice is defined by the intersection of a radiused orifice bore and a cross slot in the flat face of the nozzle.

Abstract: A deflector type spray nozzle for fire protection systems in marine or land storage spaces with little headroom between the stored items and the ceiling. The nozzle is adapted to discharge a uniformly distributed, symmetrical spray pattern in a nearly horizontal direction so as to reach all ammunition, supplies, or other boxed or crated items within the field of the spray pattern underlying the nozzle. The nozzle would also be useful in applications other than fire protection systems where the headroom is limited and a symmetrical, uniformly distributed spray pattern in a nearly horizontal direction is needed.