Abstract: A liquid dispensing device comprises a body member connectable to a source of pressurized liquid and a nozzle carried by the body member and having an inlet communicating with the source of pressurized liquid, and an outlet orifice for discharging the pressurized liquid in the form of a jet. The nozzle is rotatably mounted in the body member to either an operative position wherein its inlet faces the source of pressurized liquid for discharging the pressurized liquid through its outlet orifice, or to a self-cleaning position wherein its outlet orifice faces the source of pressurized liquid for flushing out clogging particles through the nozzle inlet. The nozzle includes two sections, one of which is presettable to a plurality of different positions to define with the other section a plurality of outlet orifices of different cross-sectional areas.

Abstract: An enclosed slurry dispensing system employs a sealed pressurized reservoir for supplying slurry through a bypass chamber to a dispensing nozzle. Excess slurry is bypassed through the bypass chamber to an intermediate chamber. Slurry is allowed to return to the reservoir through a normally-closed check valve, closed by the higher pressure of the reservoir. The system is purged by opening the reservoir to the atmosphere, creating a sub-atmospheric pressure in the bypass chamber. Air is admitted through the nozzle to purge the nozzle of slurry. At the same time, the check valve opens and excess slurry returns to the reservoir from the intermediate chamber.

Abstract: There is disclosed a spray tip for airless spraying in which a turret member, which carries the tungsten carbide spray tip, is rotatably mounted in a spray tip housing and is removably and interchangeably received in the housing. The turret member is provided with a dynamic seal which has a seal formed of a very hard plastic, preferably an acetal copolymer that is filled with a reinforcement material, preferably with glass fibers. The hard reinforced plastic resists cold flow and extrusion while, nevertheless, providing a resilient seal that is very effective, even when spraying very low viscosity liquids. Longevity of this seal and ease of rotation of the turret member while maintaining full sealing pressure on the seal is achieved by the cooperative use of a resiliently biased piston support for the seal.

Abstract: For cleaning spraying apparatus, such as a spray gun, the spray outlet is sealingly coupled to a conduit coupling (possibly after removal of an air cap). Cleaning solvent is then passed through the gun and coupling, and is collected in a reservoir without being sprayed into the open air. For a pressure feed gun, the solvent is fed without the use of a compressed gas stream. The cleaning action may be enhanced by injecting air into the solvent adjacent its entry to the gun. Solvent (and injected air) may also be passed through the gun in reverse direction. The process may be automated, with the gun held in a housing with its trigger clamped open.

Abstract: There is disclosed an improved spray tip for airless spraying of liquids in which the spray orifice is mounted in a rotatable turret member which is captured in a subassembly of a plastic spray guard and a tubular metal housing. The housing has a longitudinal through passageway which receives a floating piston seal member that has a forward, cylindrically concave face which is urged into a tight seal against the rotatable turret member by the liquid pressure which acts on the upstream face of the floating piston seal member. The floating piston seal member is sealed in the longitudinal through passageway by an annular seal which also restrains the turret member against rotation when the liquid pressure is released, thereby freely permitting substitution of spray orifices by interchanging of turret members.

Abstract: A rotary type electrostatic spray painting device comprising a rotary shaft supported by static pressure air bearings in a non-contact state. A drive turbine wheel and a braking turbine wheel are fixed to the rotary shaft. A paint injection nozzle is provided for feeding paint onto a cup shaped inner wall of the spray head. The paint injection nozzle is connected to a paint suction device. When changing the color of the paint, pressurized air is injected towards the braking turbine wheel and, at the same time, paint remaining in the paint injection nozzle is sucked away by the paint suction device.

Abstract: The apparatus consists of two chambers, one inside the other, the outer being substantially larger than the inner, with a space between the chambers, but with inner projecting bumps or lands that seal to the outside surface of the inner chamber. Both chambers have holes to admit and conduct fluid and one of the holes is a spray nozzle. The various plates, chambers bumps and holes are arranged so that when the outer chamber is in one position spray fluid is conducted to the back of the spray nozzle which sprays in the ordinary way. When there is a blockage the user rotates the outer chamber to the alternate position which covers the spray nozzle, makes it confluent with the inner chamber, aligns a new set of openings, bumps block others, so that in this alternate position spray fluid pressure forces the spray fluid into the space between the chambers, into the spray nozzle opening and out a debris flushing outlet. This reverse flow carries blocking debris from the spray nozzle and discards them.

Abstract: A sprayer comprising a housing (10) having an internal aperture in which a spool (12) is mounted for translational movement is disclosed. The spool has a nozzle (32) mounted to it. A cavity (30), formed in the spool, is configured to provide a passageway for directing fluid from an inlet (20) in the housing to the nozzle when the sprayer is in a spraying position. The cavity also provides a fluid passageway from the fluid inlet to a fluid outlet (21), which is also formed in the housing. The latter fluid passageway permits a reverse fluid flow through the nozzle. The direction of the reverse fluid flow is opposite to spraying flow direction. Thus, the reverse fluid flow cleans the nozzle by removing matter that clogs the nozzle. A pneumatically actuated, double-acting piston and cylinder assembly is used to move the spool between the spraying position and the cleaning position.

Abstract: The nozzle of the invention comprises a rotary element placed within a central body and traversed by a channel having a spray orifice, a safety tip placed on the front of the nozzle and an adapter placed between the central body and the diffuser of the spray gun. The seal between the nozzle and the diffuser is provided by a joint, the front part of which has ribs introduced into corresponding grooves in the rotary element to assure appropriate positioning.

Abstract: A flow control nozzle and shutoff valve has a housing which defines inlet and outlet openings on opposite sides thereof, and a flow channel extending therethrough for communicating the inlet and outlet openings. A control member is journaled by the housing for rotation about an axis that intersects the flow channel. The control member has a ball-shaped portion that is positioned along the flow channel. An elongate flow passage is formed through the ball-shaped portion of the control member. A curved, screen-like, flow regulating formation is positioned at one of the ends of the flow passage. The control member is movable relative to the housing among first, second and third control positions to selectively bring its flow passage into or out of alignment with the flow channel, and to selectively position the screen-like formation near the inlet and the outlet openings.

Abstract: There is provided a reversible spray tip of the type used with a spray device adapted for hydraulically atomizing and spraying liquids, the reversible spray tip includes a rotatable member mounted in the spray tip housing having a diametric bore therethrough terminating in a spray opening, the housing includes an axial bore communicating between the fluid passageway of the spray device and the diametric bore of the rotatable member, a sealing member is mounted in the axial bore of the housing and is provided with an axial fluid bore therethrough communicating between the fluid passageway of the spray device and the diametric bore of the rotatable member, the sealing member includes a resilient sealing washer disposed between the nozzle housing and the sealing face of the spray device. The sealing washer is undercut in the internal sidewall at the inlet end thereof so as to form an annular skirt abutting the sealing face of the spray device.

Abstract: There is disclosed an improved spray tip particularly suited for airless pressured spraying utilizing a spray orifice member in a removable turret member that can be rotated to reverse the orifice for cleaning. The design permits rapid exchange of the turret member, permitting quick substitution of different sized orifice members. The turret member is sealed in the assembly with a thin plastic seal and a seal support which is compressed in the assembly by hand tightening. The seal and seal support are restrained in the spray tip against dislodgement during removal of the turret member. A tee seal is provided which has a flange of reduced diameter which seats against the end of the spray gun to insure complete sealing with hand tightening of the retainer nut. The spray tip also includes a low friction bearing washer between its housing and retaining nut which, in cooperation with the tee seal, permits rotation of the spray tip without loosening its retainer nut.

Abstract: A valve for applying a flowable material in which it is desired to provide a sharp cutoff in application of the material includes a valve body with a chamber therein in communication with a source of the material to be applied. A movable piston is positioned within the valve body and there is a passage in the piston opening to the chamber with the passage terminating in an application opening. A movable valve stem is positioned to open and close upon the passage chamber opening to control the flow of material to the passage and application opening. A negative pressure is created at the application opening at or immediately after closure of the valve stem upon the passage chamber opening to thereby provide a sharp cutoff in the application of the material from the opening.

Abstract: A spraying device comprising a spray nozzle holder mountable in a holder housing and having two mounting elements extending in opposite directions from the nozzle in the holder and transverse to the housing, one of these elements being a rotatable handle. The housing has two openings located substantially opposite each other for accommodating the respective mounting element; at least one opening having a width which is less than the width of the holder in the vicinity of the nozzle, and at least one slot-shaped opening along which the holder can move crosswise to the housing when the holder is being mounted in the housing or dismounted therefrom.

Abstract: A reversible airless nozzle for a spray gun comprises an adapter mounted on a forward end of the gun, a filter in the adapter and an airless spray tip captured between the adapter and a safety cap. Should a small outlet orifice from the spray tip become plugged, it may be cleared by inserting the spray tip into the forward end of the adapter in the direction reverse to that for normal spraying, and then briefly triggering the spray gun to eject the blockage. The spray tip is carried in a housing adapted for a snug fit into the forward end of the adapter during cleaning, and an insert in the housing prevents the spray tip from being forced from the housing when reverse hydraulic pressures are applied.

Abstract: A reversible spray tip or nozzle is provided for use with spray guns and like devices adapted to hydraulically atomize and spray liquids such as paint comprising a housing, a removable rotatable member transversely located in said housing having a transverse fluid bore terminating in a spray opening, and a sealing member in said housing slideably and releasably engaging the rotatable member and having a fluid passageway therethrough communicating between the fluid bore in the rotatable member and the source of high pressure liquid supplied to the spray gun or like device.

Abstract: There is disclosed an improved spray tip particularly suited for airless pressured spraying utilizing a spray orifice member in a removable turret member that can be rotated to reverse the orifice for cleaning. The design permits rapid exchange of the turret member permitting quick substitution of different sized orifice members. The turret member is sealed in the assembly with a thin plastic seal and a seal support which is compressed in the assembly by hand tightening. The seal and seal support are restrained in the spray tip against dislodgement during removal of the turret member. A tee seal is provided which has a flange of reduced diameter which seats against the end of the spray gun to insure complete sealing with hand tightening of the retainer nut. The spray tip also includes a low friction bearing washer between its housing and retaining nut which in cooperation with the tee seal permits rotation of the spray tip without loosening its retainer nut.

Abstract: There is disclosed an improved spray tip particularly suited for airless pressured spraying utilizing a spray orifice member in a removeable turret member that can be rotated to reverse the orifice for cleaning. The design overcomes difficulties with prior art spray tips of this construction by the use of a thin resilient seal which is located between the turret member and a seal support which is compressed in the assembly. The use of the thin seal achieves a fluid tight seal that prevents leaking even of low viscosity liquids while avoiding the seizure problems which have characterized plastic seals of prior devices. The turret member is removeable without disassembly of the spray tip or its guard, thereby permitting facile interchanging of turret members with differently sized orifices.

Abstract: A reversible and quick change nozzle holding tip assembly for spray guns is provided with a base member for attachment to the outlet end of the spray gun which rotatably mounts an adapter piece. A gasket member extends from the outlet end of the spray gun through the base member and adapter piece into contact with a nozzle mount holding a nozzle in a recess in the adapter piece. The nozzle mount is contained in a nozzle mount holder having a bridge portion projecting radially outwardly of the adapter and terminating in a second nozzle mount containing a second nozzle. The nozzle mount holder is both reversible to invert a given nozzle and invertible to insert the second nozzle. A clamping or cover nut includes a quick lock thread mesh with the adapter piece to clamp the nozzle mount in position in the adapter piece in engagement with the gasket.

Abstract: A rinsing apparatus for microbiological cleaning of liquid-conducting zones of filling elements of a filling machine, such filling elements being provided with sealing structure in the region of outlets thereof. The apparatus includes a plurality of rinsing elements each having an interior chamber for receiving a fluid medium and each movable into an operative position for sealing co-operation with the sealing structure of a respective one of said filling elements, so that the fluid medium can transfer from the filling element outlet to the rinsing element chamber. Retaining members are provided for retaining each rinsing element in the operative position relative to the associated filling element. Each rinsing element additionally includes at least one outlet duct communicable with the lowermost region of the chamber for discharge of the fluid medium from the rinsing element. Communication between the or each outlet duct and the chamber is controlled by a valve arranged in the rinsing element.

Abstract: A safety device for protecting a burner of a coal gasification plant against solid blockage. Solid blockage may occur in a burner of a coal gasification plant fed with a mixture of coal particles and fluid. In order to protect the burner against solid blockage a safety device is proposed which is arranged in the supply line to the burner. By means of this safety device relatively large pieces of solid material, which might cause blockage of the burner, can be eliminated from the mixture of coal particles and fluid supplied to the burner.

Abstract: Flotation apparatus for de-inking of pulp suspension in a flotation cell with injectors for feeding the pulp suspension into the cell and for aerating the pulp suspension. The injectors are equipped with wide slot nozzles through which the suspension flows having a ratio of cross-sectional area to periphery of between 1.5 mm and 4.0 mm. A mixing chamber receiving pulp suspension flow from the wide slot nozzles is provided having a cross-sectional area which is between 1.3 to 1.7 times the cross-sectional area of the wide slot nozzles.

Abstract: A spray head which is characterized by a tubular body with an axial bore divided into axially spaced sections of different diameter with the forward section, which is at the discharge end of the head, being of the largest diameter and constituting a chamber in which a spherical spray tip holder is mounted so as to be rotatably seated on the mating inner face of a removably mounted end cap, which holder has a radial socket aligned with a cross bore in the body for receiving a turning member enabling rotation of the tip holder between an operative position for direction of spray material through a discharge aperture in the end cap and a cleaning position for reverse flow of material through the spray tip and a bearing and sealing assembly engaging the tip holder surface opposite its engagement with the end cap which assembly is arranged to minimize the pressure exerted on the tip holder by the spray material and possibly leakage of the product into the tip holder chambers, the latter being provided with a relie

Abstract: In a system for spraying liquid asphalt emulsion and solvent therefor, a hydraulic system including a pair of hydraulic motors is used to selectively drive a pair of pumps coupled to provide either liquid asphalt emulsion or solvent therefor to a flapper type check valve. The flapper type check valve readily passes liquid asphalt emulsion therethrough to a spray wand with backflow of the liquid asphalt emulsion to the pump for the solvent being blocked by a solvent check valve. When spraying of the liquid asphalt emulsion is completed, the solvent pump is turned on to force solvent at a relatively high pressure into the flapper type check valve to cleanse the hinged flapper mechanism within the check valve and then the components down-stream thereof including the spray wand.

Abstract: An improved system for aerating and mixing waste water which is circulated through a plurality of passages in submerged mixing chambers from an inlet to outlet of each wherein gas is mixed with the water, preferably by forming two parallel streams. To flush debris from the mixing chambers and conduits: (1) each inlet is connected to a location higher than the inlet, and at a lower pressure; (2) circulation of water is stopped; and (3) gas is continued to be forced into the passages to create backward flow of waste water through each chamber from outlet to inlet and thence to the higher location, carrying lodged debris out of the chambers and conduits. Intermittent gas flow creates pulsations which help dislodge debris.

Abstract: Apparatus for attachment to a hand operated spray gun, comprising a cylindrical rotatable member having a spray orifice therein, which is rotatable between a spraying position and an orifice cleaning position, the rotatable cylindrical member having a metallic sealing member surface of matching shape and adjacent thereto, and a further resilient sealing member for permitting leakproof attachment to a spray device. The rotatable spray member is actuably coupled to a safety tip guard so as to become disassembled if the safety tip guard is removed.

Abstract: An airless spray gun reversible spray nozzle unit is provided adapted to replace the normal or standard fixed spray position unit without any modification of the external spray head. The external spray head normally positions and holds the fixed position spray nozzle unit in spray position in the airless spray gun. The present adaptation is made possible by means of a floating or sliding female ferrule axially movably positioned and slideable intermediately between a pair of spaced apart keyed flanges defining the unit size which act as stops therefor and assures a leak-proof machined fit of the reversible nozzle when the inventive spray nozzle unit is positioned to spray, or in reversed position so the orifice of the nozzle can be backwashed and freed of binding occlusions.The size, weight and form of the unit adds substantially no increase in weight or volume to the conventional fixed position airless spray head spray nozzle unit and is easily and quickly manually reversed when desired.

Abstract: Improved apparatus for flushing particulate matter from the pipeline of a center pivot irrigation system. The improved apparatus provides a length of downwardly extending pipe interposed in the pipeline in the immediate vicinity of or contiguous to the outermost mobile tower assembly of a plurality of such assemblies transporting the pipeline, permitting an operator standing on the ground to open the pipe during flushing. The downwardly extending pipe includes a restrictive opening for limiting the rate at which water is released from the pipeline during flushing.

Abstract: An improved method for aerating and mixing waste water which is circulated through a plurality of passages in submerged mixing chambers from an inlet to outlet of each wherein gas is mixed with the water, preferably by forming two parallel streams. To flush debris from the mixing chambers and conduits: (1) each inlet is connected to a location higher than the inlet, and at a lower pressure; (2) circulation of water is stopped; and (3) gas is continued to be forced into the passages to create backward flow of waste water through each chamber from outlet to inlet and thence to the higher location, carrying lodged debris out of the chambers and conduits. Intermittent gas flow creates pulsations which help dislodge debris.

Abstract: A laser system includes a nozzle assembly for use in directing a shielding gas around a laser beam and thereby protecting the point of focus from contamination by the atmosphere as is useful in welding and cutting applications. The nozzle includes a manifold section for admitting a shielding gas such as inert gas through a diffuser formed therein which exits from an outlet aperture through a nozzle tip section. The geometry of the nozzle is such that a certain amount of the shielding gas is flowed backward through an inlet aperture in the manifold section and thence into a housing container reflecting mirrors for directing and focusing the laser beam through the nozzle assembly. The remaining shielding gas, which is the bulk of the gas admitted, passes out through the outlet aperture in column fashion around the laser beam. By producing a back flow of shielding gas, aspiration of air through the housing and onto the workpiece is avoided.

Abstract: There is disclosed a spray nozzle head for spraying of pressured liquid such as airless spraying and the like which is constructed with a minimal number of parts and which provides for facile reversal of the spray orifice in the head, thereby permitting the orifice to be cleaned by the liquid pressure. The spray nozzle comprises a body with a longitudinal through passageway and a cylindrical through bore orthogonal to and intersecting the through passageway. A cylindrical turret member which carries a removable orifice spray tip is seated in the through bore and is restrained therein by a detent which permits rotation of the turret member through at least 180.degree. for reversing the direction of the orifice spray tip. The turret member is sealed by a single seal washer that is biased against the turret member by an adaptor threaded into an internally threaded counterbore in the longitudinal through passageway of the body.

Abstract: A mounting and cleaning adapter for use with a spray gun in which the spray tip is normally non-reversible and projects through a retaining nut in the paint spray position. The adapter comprises outer and inner sleeves for mounting the tip in a reversed cleaning position or in a spraying position. The outer sleeve is an elongated retaining nut which threadably engages to the spray gun for retaining the tip on the outer end of the inner sleeve, in the paint spray position and in the cleaning position within the outer sleeve. In the cleaning position, the inner sleeve receives the length and diameter of the barrel of the spray tip restraining the same within the outer sleeve. The fluid from the spray gun is forced backwards through the spray tip orifice dislodging accumulated debris.

Abstract: There is disclosed a reverisble spray tip assembly useful for airless sprayers and the like which has the spray tip member mounted in a barrel housing with distal portions of equal lengths and diameters and medial rim means of greater diameter. The assembly is secured to the discharge of a spray gun and the like with a retainer but that holds the assembly in a spraying position with the spray tip member directed to discharge a spray pattern from the gun and in a reversed position with the spray tip member seated against the barrel of the spray gun to permit discharge of the liquid in a reverse direction through the spray tip member, thereby cleaning the member. The assembly is provided with at least one flat chordal surface on the forward distal portion which is indexed to the orifice of the spray tip member to permit alignment of the spray tip member after securing the retaining nut and assembly to the barrel of the spray gun.

Abstract: This present invention relates to a spray head for spray diffusers of liquids, powders, and the like. This spray head consists of three separable parts mounted together to form an air-admission chamber between them. The head has an internal groove for collecting traces of the spray products after each spraying operation, such that the product does not flow down the side of the head and the diffuser to render the diffuser inoperative.

Abstract: This invention discloses a self-purging injection valve comprising at least one supply port, at least one purging waste port, an injection port and an injection port barrel, the injection port barrel projecting from the injection port through the valve in communication with said supply port and purging waste port, and a valve stem having an internal passage and being adapted to slide within the injection port barrel between a purging position and an injection position, to seal the injection port, to block the direct flow of materials within the injection port barrel external to the valve stem between the supply port and the purging waste port, but to otherwise permit the flow of purging fluids from the supply port along the internal passage and about the valve stem within the injection port barrel to the purging waste port when said valve stem is in the purging position and to open the injection port and to permit the flow of materials from the supply port within and without the valve stem to the injection po

Abstract: Apparatus is disclosed for attachment to a spraying device, comprising a rotatable ball member having a spray orifice and passage, and a handle formed as an integral part, a housing for enclosing the ball member while allowing the handle portion to project external of the housing, a sealing member for fitting into the housing in sealing contact with the ball member, and a threadable attachment for securing the housing and ball and sealing members to a spraying device so that the ball member may be rotatably moved to place the spray orifice and passage in forward and in reverse contact with the spraying device.