Abstract: An injector nozzle is provided which provides a pilot charge of fuel followed by a charge of coal/water slurry. The injector nozzle has a valve which is moved by coal/water slurry pressure to introduce pilot fuel followed by coal/water slurry. After the coal/water slurry is introduced the valve and valve seat are purged by pilot fuel.

Abstract: An apparatus by which wet sandblasting operations may be carried out with the operator disposed adjacent the discharge nozzle of the system having full control over the air, sand and liquid supplied to the discharge nozzle through the utilization of a single airflow control valve.

Abstract: The essence of the invention resides in that the apparatus comprises a gas istribution unit for distributing inert gas, oxidant and fuel gas, and has a cylinder provided with a headpiece. Walls of the cylinder have ports communicating its interior with gas sources, whereas the headpiece includes passages to convey gases from the interior of the cylinder to a barrel.

Abstract: A process and a device (10) are proposed for spraying hot melt glue with which the heated hot melt glue by means of a pneumatically operated extrusion gun can be fed to a nozzle (25), to which pressurized air is supplied for spraying the glue. The pressurized air is heated up by means of a heating cartridge (14) around which the pressurized air is fed in spiral form. The heating cartridge (14) heats up the casing (12) of the extrusion gun simultaneously and controlled.

Abstract: A hose-end valve device to control the flow of water from a garden hose and liquid from an attached pressurized container with a single motion. The control device includes a camming ring rotatably mounted on an extension of a hose coupling. Rotational movement of the camming ring with respect to a tubular member which is attached to an actuator panel causes axially interacting camming surfaces to change the relative axial positions of the ring and tubular member thereby opening or closing an axially movable water flow valve, depending on the direction of rotation. Rotational movement of the camming ring with respect to a fixed frame opening causes radially interacting camming surfaces to move the actuator panel radially which depresses or raises the valve stem of the pressurized container. A preferred axially movable valve is an accordion-like self-closing washer-valve.

Abstract: A liquid dispensing gun wherein a spray pattern control valve is located internally of the gun. The spray pattern control valve is in the form of a two position air flow valve movable between a first position wherein low air flow is supplied through the valve to a second position wherein high air flow is provided through the valve. The valve has two adjustable stops operable to fix the low air flow and the high air flow positions of the valve. Manual pressure on the stem of the valve controls movement between the two positions.

Abstract: A collecting assembly for removing liquid vapors and particulates from a dirty gas stream including a housing having a dirty gas inlet and a clean gas outlet, a gas treating passage extending through the housing interconnecting the gas inlet and the gas outlet, a blower or fan adapted to draw the dirty gas stream into the housing through the gas inlet where it flows through an electrostatic precipitating section, and an oil spraying or fogging assembly adapted to periodically spray an atomized oil mist onto the discharge and collecting plates of an electrostatic collecting assembly mounted in the precipitating section to irrigate and wash accumulated particulates off the plates while continuing gas cleaning operations.

Abstract: A plural component dispensing nozzle having internal passages for the introduction of at least two components for mixing and dispensing, and having a one piece mixing chamber with impingement orifices axially spaced along the chamber, and having formed as a part thereof sealing flanges to develop the fluid flow passages into the mixing chamber, and to provide an isolation seal between the plural components as well as fluid seals between the flow passages and the nozzle.

Abstract: A control valve for a spray gun which is engageable by a spray gun trigger to release pressurized air and pressurized liquid through the spray gun for spraying in a predetermined sequence. The valve includes a slidable spool axially aligned with a liquid valve and valve seat and connected thereto by an axial valve stem, whereby the slidable spool has a beveled surface thereon, which surface is in contact with a second valve stem aligned in an air passage in the handle of the spray gun for opening and closing an air valve therein. The valve mechanism is actuated by trigger movement, first to open the air valve and second to open the liquid valve to insure the controlled release of pressurized liquid and air for optimum spraying conditions.

Abstract: A plural component spray gun which can be used as an air atomizing gun for atomizing material at the nozzle for external mixing with a catalyst, and, which is convertible to airless operation. The spray gun has a nozzle body which incorporates passageways for delivering atomizing air and a fluid component to a mixing chamber at the outlet to one of a plurality of nozzles attached to the nozzle body. To convert the spray gun to airless operation, the nozzles are removed, and a sleeve inserted in the air atomizing chamber. One of the nozzles is replaced with an airless type and they are reattached to the gun body. The replaced nozzle has a centrally located annular flange which extends into the air atomizing chamber to hold the sleeve insert in the chamber to seal the air passageway. The centrally located annular flange on the replaced nozzle also includes an annular cavity, into which an insert having an orifice restriction can be inserted for increasing the velocity of the component during airless operation.

Abstract: A gun for dispensing a plural component system includes a housing having appropriate connections to a pressurized air supply and pressurized first and second component storage reservoirs. Within the housing are located first and second component feed ports, each having a control valve located in its interior. A valve carrier member is movably located in the housing and is moved by a trigger. The first and the second valves are connected to and moved in response to movement of the valve carrier member. The gun includes a gas passage having a gas valve located therein. The gas valve is also connected to and moves in response to the valve carrier. At the forward end of the housing is a static mixing chamber which has a discharge outlet as well as inlets leading to both of the component feed ports and to the air passage. When the valve carrier is in a first position pressurized air is introduced into the mixing chamber which purges the mixing chamber.

Abstract: An improved electrostatic spray gun, particularly of the hand-held type, is disclosed including an electrically insulative barrel and nozzle assembly, an electrically insulative air valve module mounted to the rear of the barrel assembly and externally thereof, and an electrically conductive metal handle assembly enclosing the rear end of the barrel and the air valve module. A charging electrode protrudes from the discharge orifice of the nozzle assembly. The flow of air through the barrel and nozzle assembly is controlled by a trigger which actuates the air valve. Actuation of the air valve in turn controls a needle and seat valve assembly close to the discharge orifice of the nozzle assembly to control the flow of coating material through the gun. A resistor is disposed inside the needle valve immediately upstream of the charging electrode.

Abstract: A forced air nucleating jet gun assembly comprised of a nozzle body designed to atomize material at the nozzle for external mixing with a catalyst which is atomized in the handle body of the gun assembly. The nozzle body incorporates passageways for delivering atomizing air deflected counter to the path of a material delivered to a fluid tip. The fluid tip assembly is designed to deflect atomizing air into the path of the material for low-pressure delivery of resin to the jet. An air control valve is incorporated into the nozzle body and is operated sequentially with the material valve to purge the fluid tip prior to delivery or supply of material for atomizing by air. The forced air nucleating system incorporated in the nozzle body delivers resin and air or atomized resin through the fluid tip external mixing with catalyst.

Abstract: Dispensing apparatus has a body defining therein a tubular chamber with an outer wall of generally circular cross-section. A generally coaxial discharge orifice at an end of this chamber is closed by a first valve that includes a member of generally circular cross-section. That member also forms an inner chamber wall and defines with the outer chamber wall an annular discharge passage that is convergent towards the discharge orifice. An annular outlet is in one of the chamber walls and first passage is arranged to supply liquid to be dispensed to the annular outlet for discharge into the discharge passage. Second passage is provided for directing gas under pressure into the chamber for flow through the discharge passage, past the annular outlet and out the orifice.

Abstract: A valve controlled multiple port nozzle device is provided for co-injection molding to sequentially and simultaneously feed a plurality of plastics material melts into a mold. The nozzle device is especially adapted for initially feeding a skin melt followed by a simultaneous feeding of the skin melt and core or foamed melt and then followed by a final skin melt feed into a mold for producing a molded article with a core surrounded by a complete skin. The nozzle device has a single needle or pin valve controlling flow through the nozzle orifice and sequentially opening the orifice to flow from two inlet ports. The needle or pin has a blind bore selectively communicating with one of the ports as it is retracted from the nozzle orifice and spacers are provided to vary the gap between the needle valve tip and the orifice relative to the opening of the blind bore to its port.

Abstract: There is disclosed herein a spray gun particularly adapted for heavy duty use in applying a variety of fluids to the working surfaces of dies, molds, or other like forming apparatus. The spray gun comprises a main body housing adapted for the connection of compressed air and other fluid supply lines and having a single axially movable double action valve disposed therein which is adapted to selectively control both the flow of compressed air and other desired fluids. The double action valve is actuated by a lever arm connected to the body portion and engaging a portion of the valve member. A delivery tube is connected to the discharge end thereof for transmitting and directing the fluid or fluids to the surface to be sprayed.

Abstract: A spray gun quickly convertible between an airless non-fogging mode and a fogging or air mode when using a fog dispensing wand accessory. The hand grip is formed in part by a valve housing for the liquid component and, in part, by the overlapping ends of a pair of valve control levers for the gun. The fog generating chamber embraces the spray nozzle of the spray gun, and is formed within the coupling holding the fog dispensing wand detachably assembled over the spray nozzle.

Abstract: A spray gun is disclosed for use by professional hair stylists in spraying hair spray or hair setting substances on the hair of customers. The spray gun includes a rigid barrel and handle and a pivotal trigger which opens and closes needle valves mounted in the handle. One needle valve controls an air conduit while the other needle valve controls a liquid conduit and the needle valve of the air conduit is opened before and closed after the needle valve of the liquid conduit.