Abstract: A method of controlling a fluid delivery machine configured to deliver fluid on a worksite is disclosed. In the method, operation of a power source of the fluid delivery machine is controlled with a control module. Fluid delivery on the worksite is also controlled by the control module.

Abstract: A system and method are provided for automated control of application of fluid to a surface. A surface map is annotated with shapes designating zones for spraying, and excluding others. A control system in a vehicle uses the annotated map and GPS to assist the operator of the vehicle avoid spraying on excluded zones, and provides a record of the spraying operation including locations sprayed and fluid spray rates. The control system operates valves to control spraying from a container on the vehicle, based on several parameters, so as to avoid spraying excluded zones and steep slopes, to avoid overlaps, and to limit fluid spray rates below pre-determined maximums. The system further assists the operator by providing a visual guide on a display. A kit can be provided to retrofit a vehicle for landspraying.

Abstract: A spray paint system for spraying a horizontal surface having a frame supporting an inverted elongated rigid container configured to hold a paint formulation that is pressurized with a pumping device partially located within the container where the frame has at least one wheel to allow a user to roll the system along a horizontal surface while spraying paint through a removable spray tip. This system can be used to mark a horizontal surface with precise and clear writing of lines, letters or symbols.

Abstract: A high pressure washer apparatus in combination with a lightweight fastenerless cart. The cart is characterized by a rigid structure which essentially consists of a continuous folded aluminum plate having a horizontal platform wall portion for supporting said washer apparatus; downward extending side wall portions; an upward extending front wall portion and an upward extending rear wall portion. A telescoping handle is mounted on the rear wall portion for pushing, pulling, and lifting the pressure washer apparatus. Accessories, mounted in “built-in” provisions are readily available to an operator of the pressure washer apparatus.

Abstract: Embodiments of the invention relate to an apparatus for discharging a fertilizer in strips onto agriculturally productive land by trailing hoses, which apparatus is designed for installing on the rear of a tank vehicle, with two jibs which can each be pivoted to and fro about a vertical axis (A1, A2) between a discharge position and a transport position. Certain embodiments relate in particular to an apparatus of this type which has a supporting device which is arranged on the apparatus so as to be pivotable about a vertical axis (B) and is designed, in the transport position, to support the jibs in relation to the carriageway in a supporting section spaced apart from the axis (B). Embodiments also relate to a tank vehicle with an apparatus of this type.

Abstract: A crop sprayer includes a main frame. A product tank and a rinse tank are supported by the main frame. A battery is also supported by the main frame. A framework is supported by the main frame that defines a routing space. A control panel is attached to the framework that defines at least a first panel opening, a second panel opening, and a third panel opening. A first fluid line is connected between a first fluid outlet and the product tank. The first fluid line extends through the routing space and the first panel opening. A second fluid line is connected between the second fluid outlet and the rinse tank. The second fluid line extends through the routing space and the second panel opening. A first electrical switch is supported by the framework adjacent to the third opening. Electrical wiring extends between the first electrical switch and the battery, the electrical wiring also extending through the routing space.

Abstract: A device and method of use for a towed portable cleaning facility is disclosed. The device employs storage tanks for both the storage and transport of cleaning fluids. The tanks serve the additional function of surrounding and enclosing the cleaning area an area that may be used for cleaning or storage. By utilizing the tanks as walls, the present invention provides a portable cleaning station. The device may further include the ability to treat and clean used fluids in order to either reuse or safely dispose of the used fluids as well as the ability to recover heat energy from an engine compartment to heat cleaning fluids.

Abstract: An electrostatic spraying system for decontamination of a vehicle is described. The system includes a wheeled platform sized to fit inside the vehicle, at least one tank operable to contain one or more decontaminant agents, the tanks supported by said wheeled platform, a plurality of nozzles affixed to the wheeled platform, wherein each nozzle is positioned for distribution of the decontaminant agents in at least one pre-determined direction, an electrostatic charging system connected to each of the nozzles for applying an electrostatic charge to the decontaminant agents as the agents are dispersed, and at least one compressor in communication with the tanks for pressurizing the decontaminant agents. The one or more compressors are capable of providing a pressure sufficient to provide a constant distribution of the decontaminant agents through the electrostatic nozzles.

Abstract: An autonomous and self-propelled vehicle for laterally displacing feed, having a frame and a housing, the housing including a rotatable feed-displacement device, at least a bottom section of the feed-displacement device being rotationally symmetrical about a cylinder axis , the cylinder axis being at an angle to the vertical direction in such a manner that a part of the feed-displacement device which, viewed in the direction of travel, is situated at the front is arranged closer to the ground than a part of the feed-displacement device which, viewed in the direction of travel, is situated at the rear.

Abstract: An apparatus for spraying a treatment liquid onto grass growing on a ground surface includes a plurality of rotatable discs spaced laterally apart across the path of travel. Each disc has a plurality of cutters which are adapted to penetrate the ground surface and to cut holes therein as the apparatus travels forwardly. The holes are spaced apart along the path of travel and are also spaced apart laterally. The apparatus also includes a set of nozzles positioned on the apparatus above the grass such that each nozzle is spaced rearwardly along the path of travel from its associated disc but is aligned along the path of travel with such disc. The nozzles are adapted to spray the treatment liquid. The apparatus also including a controller for causing the nozzles to spray the treatment liquid into the holes.

Abstract: An apparatus and a method are described for sterilizing seed beds in soil. The apparatus is comprised of at least one hot water injecting chamber defined by a pair of spaced-apart side walls secured to one another and defining therebetween a passage. A plurality of jet holes are provided in an inner surface of each of the side walls and facing the direction of the passage. The jet holes communicate with a manifold associated with each side wall which is connected to a supply of pressurized hot water. Each of the side walls is configured to penetrate into the soil in at least a lower region thereof whereby to inject into the soil in the passage between the pair of plates the pressurized hot water as the hot water injecting chamber is displaced in the soil.

Abstract: A mobile pressure washing system is provided. The system comprises a frame with hinged elements for transitioning the frame between an upright position of use and a compact position for secure transport and storage of the system. System features further include a removable and replaceable tank adapted to fit on a portion of the frame, removable storage features, and pressure washing features such as a motor and pump.

Abstract: A device and method of use for a towed portable cleaning facility is disclosed. The device employs storage tanks for both the storage and transport of cleaning fluids. The tanks serve the additional function of surrounding and enclosing the cleaning area an area that may be used for cleaning or storage. By utilizing the tanks as walls, the present invention provides a portable cleaning station. The device may further include the ability to treat and clean used fluids in order to either reuse or safely dispose of the used fluids as well as the ability to recover heat energy from an engine compartment to heat cleaning fluids.

Abstract: The direct-injection spraying device, in particular for an agricultural vehicle, according to the invention comprises: a main tank (C), at least one spray boom (R), a circuit connecting said tank (C) to said boom (R), said circuit comprising a main pump (PP) and a bypass (d) for controlling the flow rate in said boom (R) in accordance with the traveling speed of said vehicle, at least one active substance store (m1, m2, m3) connected to said circuit by a metering pump (P1, P2, P3). This device comprises a cyclone mixer (M) capable of receiving, as input, the liquid (E1) from said main tank (C), and the pressurized liquids coming from said active substance store (m1, m2, m3), and capable of eliminating said boom (R) as output.

Abstract: A product distributing apparatus is described as well as a system and method of automatically calibrating the meter of the apparatus which does not require the operator to leave the operator station of the towing vehicle. One application of such an apparatus and method is in an agricultural air seeder and it is in this context that the apparatus is described.

Abstract: A mobile fragrance-dispensing device resembling a pet. The device features a base with an inner cavity for storing a fragrance canister, a microprocessor, wheels disposed on the ends of the legs on the base, and a motor with steering mechanism operatively connected to each wheel. A dispenser system is fluidly connectable to the fragrance canister. The dispenser system functions to spray fragrance from said fragrance canister when activated. A motion sensor is disposed on the head of the base, wherein when the motion sensor is activated the microprocessor activates the dispensing system for a certain length of time.

Abstract: A crop sprayer includes a main frame. A product tank and a rinse tank are supported by the main frame. A battery is also supported by the main frame. A framework is supported by the main frame that defines a routing space. A control panel is attached to the framework that defines at least a first panel opening, a second panel opening, and a third panel opening. A first fluid line is connected between a first fluid outlet and the product tank. The first fluid line extends through the routing space and the first panel opening. A second fluid line is connected between the second fluid outlet and the rinse tank. The second fluid line extends through the routing space and the second panel opening. A first electrical switch is supported by the framework adjacent to the third opening. Electrical wiring extends between the first electrical switch and the battery, the electrical wiring also extending through the routing space.

Abstract: An apparatus for application of a liquid or liquid-solid solution to soil includes an articulating tractor, a frame, a pivot point, a boom and a drag hose. The articulating tractor has a front portion and a rear portion connected to an articulation point. The rear portion has a rear wheel axle. The frame is adapted to mount on the rear portion of the articulating tractor. The frame has a front frame end located between the rear wheel axle and the articulation point. The pivot point is on the front frame end and positioned about 12 inches or more from the rear wheel axle. The boom pivotally attaches to the pivot point. The drag hose has a distal end in fluid communication with a source of liquid or solid-liquid solution and a proximal end coupled to the boom.

Abstract: A disinfecting spray module that can either be retrofit to an existing housekeeping cart or integrated into the housekeeping cart. The disinfecting spray module includes a storage container for receiving a disinfectant or cleaner. An electric pump withdraws the disinfectant and supplies the pump through a spray hose. The spray hose includes a handle having a nozzle to direct the disinfectant onto the surface to be cleaned. The disinfecting spray module can include an internal power supply or be connected to a source of electricity within the room being disinfected.

Abstract: A mobile pressure washing system is provided. The system comprises a frame with hinged elements for transitioning the frame between an upright position of use and a compact position for secure transport and storage of the system. System features further include a removable and replaceable tank adapted to fit on a portion of the frame, removable storage features, and pressure washing features such as a motor and pump.

Abstract: A mobile pressure washing system is provided. The system comprises a frame with hinged elements for transitioning the frame between an upright position of use and a compact position for secure transport and storage of the system. System features further include a removable and replaceable tank adapted to fit on a portion of the frame, storage features, and pressure washing features such as a motor and pump.

Abstract: An apparatus (10) applies product in liquid or granular form to an area and includes a pivotal platform (34) solely supported to a vehicular portion through bushings (46, 54) formed of compressible material to reduce operator fatigue. The apparatus ground speed can be locked by stepping on a step (74) pivoting a composite block (82) to engage with an engagement (84) of the transmission proportioner arm (70). A gate (88) of the hopper (26) is opened utilizing a control lever (108) pivotally mounted to a pivotably mounted control block (100) to either engage or avoid a tang (106) of an adjustment guide (102). A drive belt system includes a variator (144) having first and second sheaves (142, 146) having variable effective diameters when their pivot pin (148) is moved by pivoting a lever (164). A spray tip (200) sprays a fan style spray at a small acute angle to the application area.

Abstract: An electrostatic spraying system for decontamination of a vehicle is described. The system includes a wheeled platform sized to fit inside the vehicle, at least one tank operable to contain one or more decontaminant agents, the tanks supported by said wheeled platform, a plurality of nozzles affixed to the wheeled platform, wherein each nozzle is positioned for distribution of the decontaminant agents in at least one pre-determined direction, an electrostatic charging system connected to each of the nozzles for applying an electrostatic charge to the decontaminant agents as the agents are dispersed, and at least one compressor in communication with the tanks for pressurizing the decontaminant agents. The one or more compressors are capable of providing a pressure sufficient to provide a constant distribution of the decontaminant agents through the electrostatic nozzles.

Abstract: An apparatus for application of a liquid or liquid-solid solution to soil includes an articulating tractor, a frame, a pivot point, a boom and a drag hose. The articulating tractor has a front portion and a rear portion connected to an articulation point. The rear portion has a rear wheel axle. The frame is adapted to mount on the rear portion of the articulating tractor. The frame has a front frame end located between the rear wheel axle and the articulation point. The pivot point is on the front frame end and positioned about 12 inches or more from the rear wheel axle. The boom pivotally attaches to the pivot point. The drag hose has a distal end in fluid communication with a source of liquid or solid-liquid solution and a proximal end coupled to the boom.

Abstract: A wheeled herbicide and/or pesticide carrier incorporates a non-motorized, three wheeled cart including a frame defining a basket for receiving tanks containing a fluid solution. An air compressor and battery are also supported on the cart. A nozzle communicates with the tanks for dispensing the solution. A control panel is mounted on the cart's handle to permit a user to select which tank is to be utilized and the rate for spraying. A second embodiment of the invention is designed to support four tanks thereon.

Abstract: A spray paint system for spraying a horizontal surface having a frame supporting an inverted elongated rigid container configured to hold a paint formulation that is pressurized with a pumping device partially located within the container where the frame has at least one wheel to allow a user to roll the system along a horizontal surface while spraying paint through a removable spray tip. This system can be used to mark a horizontal surface with precise and clear writing of lines, letters or symbols.

Abstract: A spray paint system for spraying a horizontal surface having a frame supporting an inverted elongated rigid container configured to hold a paint formulation that is pressurized with a pumping device partially located within the container where the frame has at least one wheel to allow a user to roll the system along a horizontal surface while spraying paint through a removable spray tip. This system can be used to mark a horizontal surface with precise and clear writing of lines, letters or symbols.

Abstract: A portable, self-contained powered sprayer to produce a foam effluent spray from a liquid. The sprayer includes segregated air and liquid delivery systems that separately supply air and liquid to a mixing chamber. The liquid delivery system may include a pump for pumping liquid from a tank to the mixing chamber via a liquid supply line. The air delivery system may include a compressor for supplying pressurized air to the mixing chamber via an air supply line. The mixing chamber may be defined within a flow controller. In one embodiment, the sprayer includes control circuit for engaging and disengaging the pump and the compressor in response to operation of the flow controller. The control circuit may include a pressure switch operatively connected to the liquid supply line to trigger operation of the pump and the compressor in response to pressure within the liquid supply line.

Abstract: A watering system includes a watering can and a dispensing system. The dispensing system includes a cart for supporting the watering can, wheels coupled to a bottom of the cart and adapted to facilitate movement of the dispensing system on a surface, and a lever movably coupled to the cart and adapted to allow for manual movement of the watering can between a lowered position in which water held in the watering can's bucket is not dispensed and a raised position in which water held in the buck is dispensed through the watering can's spout. The lever has an exposed end adapted to be lowered by a user to move the watering can from the lowered position to the raised position.

Abstract: The invention comprises a seed spreader having a cylindrical drum mounted upon a pair of wheels for traviling the drum along the wheels for distributing seed along path upon the ground. The drum rotates with the wheels as the wheels rotate along the ground as an operator pushes the wheels forward by a handle mounted to the drum. The drum is hollow and has a door which can be opened to enable seed to be deposited into the interior of the drum.

Abstract: A pressure sprayer includes an accumulator vessel adapted to hold a pressurized fluid therein and a container that is configured to hold a chemical concentrate. A motor in fluid communication with the accumulator vessel and the container is adapted to be driven by the pressurized fluid and to pump the pressurized fluid and the chemical concentrate. A chamber is adapted to receive the chemical concentrate and the pressurized fluid from the motor to form a chemical solution. A nozzle is in fluid communication with the chamber.

Abstract: The present invention discloses and claims a single vehicle that has both full fire fighting capability in the form of a pumper in permanent combination with full medical rescue and transport capability. Provided is a transport pumper of conventional design having a crew cab with four entrances, a large capacity fire pump, a tank containing a quantity of water, another tank containing a quantity of foam, a substantial length and diameter of fire hose, ground ladders, a side controlled pump operator's panel, and all other necessary equipment to be in substantial compliance with NFPA Standard 1901. Permanently provided on the same chassis as the pumper is an ambulance or rescue transport including rear entry double doors for patients, a rear dump capability, two supine patients on stretchers carrying capabilities, air conditioning, a side entrance door and all necessary equipment be in substantial compliance with federal standard KKK-A-1822E for a rescue transport.

Abstract: An airless spray pump system and method for spraying a binder solution having suspended particles which are non-abrasive for coating a product therewith is described. A reservoir contains a supply of the binder solution and is continuously mixed to maintain the solution in a homogeneous state. An inlet check valve is connected to the reservoir and the check valve has an outlet port which is connected to a pump. The check valve is operated by an upstroke of a piston of the pump to draw a volume of a solution through the check valve and into the pump while the pump supplies, under high pressure, a solution in a transfer chamber thereof to a pressure control unit of a spray apparatus. When the piston of the pump is in a return stroke, it forces the check valve to close under pressure and simultaneously operates a transfer check valve of the pump to open to transfer solution into the transfer chamber and forces a portion of the solution to the pressure control unit.

Abstract: An apparatus for cooling external environments, comprising a pump (5) which comprises an inlet conduit (7) destined to be connected to a water supply source, and a delivery conduit (9) connected to at least a nozzle (101, 201, 301, 401) for atomising the water, a motor (6) powering the pump (5) and a pressure regulator (11) for varying the water pressure delivered to the at least a nozzle (101, 201, 301, 401), in which the pump (5), the inlet conduit (7) and the delivery conduit (9), the pressure regulator (11) and the motor (6) are all housed in a casing (2) provided with a handle (3) and wheels (4), the casing (2) being conformed in such a way as to be transportable by a single person.

Abstract: A safety system is provided for an anhydrous ammonia nurse tank (4) pulled by a tractor (1) with a tool bar applicator (2). The system includes a safety valve (10), and a breakaway coupling or connector (12) along a flexible hose (11) from the nurse tank to the applicator. The safety shutdown valve (10) closes in response to a break in the electrical connector in the event of a pull away or manual activation of a safety switch.

Abstract: A crop sprayer axle assembly includes a differential output shaft extending from a differential and coupled to a transfer drive shaft. The transfer drive extends downwardly from the differential output shaft and in a lengthwise direction with respect to the crop sprayer where it is operably connected to a wheel drive shaft.

Abstract: A method of applying a chemical material, such as a pesticide, to a surface utilizes a wheel mounted spraying assembly. The wheel mounted spraying assembly includes: a rod having a wheel rotatably mounted on its lower end portion for supporting the spraying assembly on a generally horizontal surface and enabling the spraying assembly to be moved over the surface; a spray nozzle mounted on the spraying assembly adjacent the wheel; a supply line for supplying a chemical material under pressure to the spray nozzle; and a control for controlling the flow of the chemical material to and through the spray nozzle. The spray nozzle is oriented to spray the chemical material in an expanding pattern in an outward direction to one side of the lower portion of the spraying assembly to apply the chemical material to a generally vertical and/or generally horizontal surface.

Abstract: A docking station module for fluidly connecting a mobile irrigation apparatus to a stationary hydrant water supply valve mounted on a water supply pipe, the module comprising a hydrant valve actuator resiliently suspended from a frame for floating movement in at least three mutually substantially perpendicular directions relative to the hydrant water supply valve.

Abstract: A water floor broom having a spray head that defines an elongated manifold liquid flow passageway communicating with a plurality of liquid spray nozzles, a handle fixed to said body defining a liquid flow passageway communicating with said spray head, and a power washer coupled to said handle for directing pressurized liquid via said handle to said spray head for discharge from the spray nozzles for cleaning a floor surface. The spray head has a light weight, rigid plastic construction that can be operated with lesser quantities of cleaning liquids, and a squeegee blade secured rewardly of the spray head for simultaneously scraping and cleaning water from the floor surface directed onto the floor surface by the spray head for minimizing or eliminating subsequent cleanup.

Abstract: A mobile pressure washer wand support with a dolly-like wheeled base with a cut out slot for securely holding the pressure washer wand in place. This allows the user to have the weight of the pressure washer hose alleviated to reduce fatigue and backache. The user can place the pressure washer wand in the adjustable wand slot, tighten clamps to hold the wand in place, and simply point it in the direction that is desired to be sprayed.

Abstract: A system and process for dispensing a liquid agrochemical such as ammonia into a field is disclosed. The ammonia is placed in a vessel under sufficient pressure to maintain a substantial portion of the ammonia in a liquid form. From the pressurized vessel, the ammonia is fed to a distribution manifold where it is ultimately injected into a soil through a plurality of dispensing tubes. A constant pressure flow rate control device is placed at each dispensing tube for metering the amount of ammonia fed to the soil. Furthermore, the outlet flow of each constant pressure rate control device is made to vaporize nearby the inlet flow path to create a heat exchange effect thereby cooling the inlet flow. In particular, the flow control devices allow ammonia to be dispensed from the system while maintaining sufficient back pressure and temperature within the distribution manifold to maintain the ammonia in a liquid form.

Abstract: A line marker carries a spray nozzle assembly for marking or painting a line on a horizontal surface. The spray nozzle assembly includes a mounting bracket that is clamped to a support arm in various pivotally adjusted positions. The mounting bracket carries both the spray nozzle and a pair of side shields. The spray nozzle is vertically adjustable up and down on the mounting bracket. The side shields have slides that slide transversely through the mounting bracket to provide horizontal adjustability of the side shields towards and away from one another. A clamping plate bears against the slides of the side shields when the clamping plate is tightened on the mounting bracket to hold the side shields in place on the mounting bracket.

Abstract: A safety system for a mobile anhydrous ammonia fertilizer application system is configured to be remotely actuated closed by the operator in the event of a leak in the system, and to automatically shutdown the system in the event of an actual or impending nurse tank breakaway.

Abstract: Provided is a pesticide spraying cart. In one embodiment, the comprises a pesticide tank, a retractable handle, two wheels, a recess provided between the wheels, a longitudinal hose compartment provided in a rear of the tank, a coil hose adapted to either extend out of the hose compartment by pulling or retract thereinto automatically after the force exerted on the coil hose has been released, a spray gun provided at an open end of the coil hose, a hook for holding the spray gun in an unused position, a pipe is extended from the coil hose into the tank, and a foot operated pump assembly provided in the recess. Repeatedly pressing a foot pedal to pressurize the tank, pulling the coil hose out of the hose compartment, and activating the spray gun will shoot out a uniform spray of liquid pesticide.

Abstract: An adjustable spray apparatus with multiple outlet for applying a flowable coating onto a non-vertical surface. A carriage includes an outwardly extending arm with a plurality of downwardly facing spray tips connected to a manifold mounted on the carriage. The manifold, in turn, is connected to a remotely located reservoir of flowable material. An auxiliary spray gun in connected to the manifold.

Abstract: A self propelled fence painting system for painting a length of fence. The self propelled fence painting system includes a housing that includes a front wall, a back wall and an upper end wall that is coupled to and extends between the front and back walls. The front and back walls are spaced away from each other defining a paint spraying space between the front and back walls of the housing. In one embodiment of the present invention, a portion of the fence to be painted is positionable in the paint spraying space. A drive assembly is mounted on the front wall of the housing for driving the housing on a surface. A spraying assembly is mounted on the front and back walls of the housing for spraying paint into the paint spraying space of the housing. A plurality of guide assemblies guides the system along the length of the fence.

Abstract: Mobile chemical sprayers dispense liquid chemicals over a large area, such as a lawn or garden, in a short period of time. Individuals applying chemicals are not tethered to a fixed tank by a long hose, but can instead continuously move and apply chemicals simultaneously using a mobile chemical sprayer. This facilitates a more uniform distribution of chemical, and eliminates the need to spend time moving the tank or repositioning the hose.

Abstract: A control and monitoring system for controlling the rotary atomizer of a sprayer to covert a liquid into atomized droplets which is pumped from a supply. The control and monitoring system includes component control microprocessors connected to a master control microprocessor for monitoring operating parameters of various sprayer components and controlling their operation. A remote controller is connected to the master control microprocessor for alternative manual control over the sprayer by a user or automatic control by the control and monitoring system. The master control microprocessor provides for comparison of monitored operating parameters against acceptable values stored in memory for diagnosis of anomalous operating parameters. A data collector is connected to a data port to access and store operating information processed by the master control microprocessor.

Abstract: The invention relates to a parallel spacing guide that when attached to a hand-held marking device (spray gun), it enables the user to mark an accurate and consistent extended line one to four feet from a curb, wall, or other vertical surface; and one to four feet from a line or score mark along the ground in cases where a vertical surface is temporarily absent. This is achieved by having the parallel spacing guide soundly attached to a hand-held marking device. While holding the parallel spacing guide in one hand by the embodied handle and the attached marking device by it's handle in the other hand, the user pushes the invention along the street or highway with the end of the parallel spacing guide butted against the curb or wall while simultaneously using the marking device to mark the line by discharging paint or chalk.

Abstract: The plural component striping spray system and method involves mixing two spray components by pumping them under pressure from heated supply systems and converting them into a fine spray within a spray gun where they mix by impingement before being blown out through a common spray tip orifice. The initiation and termination of spray from the spray tip is controlled by a shutoff needle, and the design of the mixing chamber, needle and spray tip are such that no mixed material is allowed to stay in the spray gun to cure and freeze up the gun. When the components are a resin and a catalyst, pure catalyst is the first and last material sprayed from the spray gun. The system includes a recirculation system which can become operative when the operation of the spray gun is terminated.