Patent Description:
<CIT> discloses control method and apparatus for a manual spray gun, which may include a second manually actuated trigger operational to select one or more coating operation parameters. <CIT> discloses a system and method for monitoring and improving operation of a spray tool.

Certain aspects commensurate in scope with the claimed invention are summarized below. These aspects are intended to provide a brief summary of the invention with reference to the claims.

In a first aspect according to appended claim <NUM>, a fluid delivery system includes a status indicator system comprising a processor. The processor is configured to receive a first signal indicative of a first status of operations of a spray application system. The processor is further configured to provide to an operator of a spray gun, via a display system, a visualization representative of the first status of operations, wherein the spray application system comprises a proportioner system configured to control a flow of a plurality of fluids to achieve a specified ratio of the plurality of fluids in a spray foam of the spray gun during operations, and to control a temperature of the fluids.

In a second aspect according to appended claim <NUM>, a method includes receiving, at a status indicator system comprising a processor, a first signal indicative of a first status of operations of a spray application system. The method additionally includes displaying to an operator of a spray gun, via a display system, a visualization representative of the first status of operations, wherein the spray application system comprises a proportioner system configured to control a flow of a plurality of fluids to achieve a specified ratio of the plurality of fluids in a spray foam of the spray gun during operations, and to control a temperature of the fluids.

In a third aspect according to appended claim <NUM>, a tangible, non-transitory, computer-readable medium includes instructions that when executed by a processor cause the processor to receive, at a status indicator system comprising the processor, a first signal indicative of a first status of operations of a spray application system. The instructions further cause the processor to display to an operator of a spray gun, via a display system, a visualization representative of the first status of operations, wherein the spray application system comprises a proportioner system configured to control a flow of a plurality of fluids to achieve a specified ratio of the plurality of fluids in a spray foam of the spray gun during operations, and control a temperature of the fluids.

In systems that transmit liquids or gases from a source location to a delivery location (or locations), status indication and system control available to a human (e.g., fluid applicator) may be important for improved application control, information presentation, fluid control, and so on. One example of systems that may benefit from improved status indication and control are Polyurethane Foam (SPF) insulation systems. The SPF systems use a pressurized hose assembly to transmit two or more fluids between a proportioning system and a spray gun that is near a foam target, such as a wall. The proportioning system is may include fluid pumps and heaters, supply drums, control system, user interface, sensors, and associated electronics. The proportioning system may be located in a truck or trailer outside of a building that foam insulation is being applied to. The fluids used to provide the insulation may be mixed at high pressure and ejected from the spray gun to initiate the chemical reaction that that results in cured foam.

In many SPF systems, status indicators and control parameters are located at or on the proportioning system, which can be several hundred feet ( <NUM> foot = <NUM>) away from where the spray foam applicator (i.e., person applying the spray foam) is working. The spray foam applicator may have special skills that improve the success of the operation, however this person may lack access to real-time system information and/or system controls that affects behavior of the spray foam process because the information and control point is usually kept a distance away in the proportioning system. Further, the spray gun operator usually wears Personal Protective Equipment (PPE) that may burden his/her ability to return to the proportioning system to adjust settings and/or determine status of the equipment and material supplies.

The proportioning system controls the temperature and may control the the pressure and mass flow ratio of two reacting fluids (e.g., denoted as A and B) that are mixed within the spray gun and ejected onto a target substrate in or on the structure being insulated. The applicator usually lacks means for easily determining the status of the remote components of the proportioning system and adjust controls when applying foam within the structure. As a result, the applicator may be unaware of certain warning or error conditions that may occur within the proportioning system, and may be incapable of making adjustments without returning to the proportioning system. Also, if the proportioning system is unable to maintain pressure, temperature, or fluid ratio within user-specified control limits, the applicator may only be aware of such conditions by noticing changes to the foam output or quality. Relying on subjective observations is problematic and may not be detected by the applicator in a timely manner. If such changes are not detected by the applicator, foam quality, consistency, and/or yield may suffer.

Situations may also arise where an a priori or immediate warning of fault condition in the proportioning system would prevent certain unwanted conditions from occurring. An example of such a fault condition is when one of the materials (A or B) is nearing an empty state. If the material is exhausted the proportioning system may inject material from one side (e.g. B) into the other side (e.g. A) of gun passages. This can result in solidification of material with the gun and/or hose and significant downtime and cost to address the problem. Many other potential error states can occur which would render the system inoperable until service could be performed. Communication of these potential or actual problems to the applicator in a timely manner can improve uptime and reduce service and repair costs.

The techniques described herein include more simple and intuitive status indication systems and control methods for use in liquid application systems, such as SPF systems. While described in the context of commercial and residential SPF applications, it is obvious this approach could be used in other similar systems where a human applicator is spraying or depositing a material onto a substrate while remote from the actual controlling process equipment.

It may be useful to describe a system that may apply the status indicator and system control techniques that may be combined with fluid delivery and the electrical delivery hoses as described herein. Accordingly and turning now to <FIG>, the figure is a block diagram illustrating an embodiment of a spray application system <NUM> (e.g., Spray Polyurethane Foam (SPF) system) that may include one or more liquid pumps <NUM>, <NUM>. The spray application system (e.g., spray delivery system) <NUM> may be suitable for mixing and dispensing a variety of chemicals, such as a chemicals used in applying spray foam insulation. In the depicted embodiment, chemical compounds A and B may be stored in tanks <NUM> and <NUM>, respectively. The tanks <NUM> and <NUM> may be fluidly coupled to the pumps <NUM> and <NUM> via conduits or hoses <NUM> and <NUM>. It is to be understood that while the depicted embodiment for the spray application system <NUM> shows two compounds used for mixing and spraying, other embodiments may use a single compound or <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or more compounds. The pumps <NUM> and <NUM> may be independently controlled.

During operations of the spray application system <NUM>, the pumps <NUM>, <NUM> may be mechanically powered by motors <NUM>, <NUM>, respectively. In a preferred embodiment, the motors may be electric motors. However, internal combustion engines (e.g., diesel engines), pneumatic motors, hydraulic motors, or a combination thereof. Motor controllers <NUM> and <NUM> may be used to provide for motor start/stop, loading, and control based on signals transmitted, for example, from the processor <NUM>. The motor <NUM> may be of the same type or of a different type from the motor <NUM>. Likewise, the pump <NUM> may be of the same type or of different type from the pump <NUM>. Indeed, the techniques described herein may be used with multiple pumps <NUM>, <NUM>, and multiple motors <NUM>, <NUM>, which may be of different types. It is also understood that while two motors are shown, other embodiments may use motor <NUM> or <NUM> mechanically coupled to pumps <NUM>, <NUM>, for example, via a shaft.

The pumps <NUM>, <NUM> provide for hydrodynamic forces suitable for moving the compounds A, B into a spray gun system <NUM>. More specifically, compound A may traverse the pump <NUM> through conduit <NUM> and then through heated conduits <NUM>, <NUM> into the spray gun system <NUM>. Likewise, compound B may traverse pump <NUM> through conduit <NUM> and then through heated conduits <NUM>, <NUM> into the spray gun system <NUM>. To heat the heated conduits <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, a heating system <NUM> may be provided. The heating system <NUM> may provide for thermal energy, such as a heated fluid, suitable for pre-heating the compounds A and B before mixing and spraying and for heating the compounds A and B during mixing and spraying. The conduit <NUM> may be connected to the conduit <NUM> via a hose fitting <NUM>. The conduit <NUM> may be connected to the conduit <NUM> via a hose fitting <NUM>.

The spray gun system <NUM> may include a mixing chamber to mix the compounds A and B. For spray foam insulation applications, the compound A may include isocyanates while the compound B may include polyols, flame retardants, blowing agents, amine or metal catalysts, surfactants, and other chemicals. When mixed, an exothermic chemical reaction occurs and a foam <NUM> is sprayed onto a target. The foam then provides for insulative properties at various thermal resistance (i.e., R-values) based on the chemicals found in the compounds A and B.

Control for the spray application system <NUM> may be provided by a control system <NUM>. The control system <NUM> may include an industrial controller, and thus include a memory <NUM> and a processor <NUM>. The processor <NUM> may include multiple microprocessors, one or more "general-purpose" microprocessors, one or more special-purpose microprocessors, one or more application specific integrated circuits (ASICS), and/or one or more reduced instruction set (RISC) processors, or some combination thereof. The memory <NUM> may include a volatile memory, such as random access memory (RAM), and/or a nonvolatile memory, such as ROM, a hard drive, a memory card, a memory stick (e.g., USB stick) and so on. The memory <NUM> may include computer programs or instructions executable by the processor <NUM> and suitable for controlling the spray application system <NUM>. The memory <NUM> may further include computer programs or instructions executable by the processor <NUM> and suitable for detecting pump <NUM>, <NUM> slip and for providing ratio control actions to continue providing as desired ratio (e.g., <NUM>:<NUM>) for compounds A and B in the presence of slip, as further described below.

The control system <NUM> may be communicatively coupled to one or more sensors <NUM> and operatively coupled to one or more actuators <NUM>. The sensors <NUM> may include pressure sensors, flow sensors, temperature sensors, chemical composition sensors, speed (e.g., rotary speed, linear speed) sensors, electric measurement sensors (e.g., voltage, amperage, resistance, capacitance, inductance), level (e.g., fluid level) sensors, limit switches, and so on. The actuators <NUM> may include valves, actuatable switches (e.g., solenoids), positioners, heating elements, and so on.

A user or users may interface with the control system <NUM> via an input/output (I/O) system <NUM>, which may include touchscreens, displays, keyboards, mice, augmented reality/virtual reality systems, as well as tablets, smartphones, notebooks, and so on. A user may input desired pressures, flow rates, temperatures, ratio between compound A and compound B (e.g., <NUM>:<NUM>), alarm thresholds (e.g., threshold fluid levels of compound A, B in tanks <NUM>, <NUM>), and so on. The user may then spray via the spray gun system <NUM> and the control system <NUM> may use the processor <NUM> to execute one or more programs stored in the memory <NUM> suitable for sensing system <NUM> conditions via the sensors <NUM> and for adjusting various parameters of the system <NUM> via the actuators <NUM> based on the user inputs. The I/O system <NUM> may then display several of the sensed conditions as well as the adjusted parameters. Certain components of the spray application system <NUM> may be included in or interface with a proportioner system <NUM>. The proportioner system <NUM> may "proportion" or deliver the compounds A, B at a specified ratio (e.g., <NUM>:<NUM>) to achieve the spray <NUM>. In this manner, the user(s) may mix and spray chemicals, such as compounds A and B, to provide for certain coatings, such as insulative spray foam.

The proportioner system <NUM> controls pressure, flow, and temperature of the fluids based on setting provided by the user. The proportioner system <NUM> is generally located at a distance from the actual foam application work area and spray foam gun <NUM>. In most of these systems, temperature and/or pressure sensing of one or more of the fluids near the spray gun <NUM> is desired to provide proper fluid mixing of the materials at the spray gun. In most of these systems, control parameters and status indicators are all located at the proportioning system <NUM>, which can be several hundred feet (<NUM> foot = <NUM>) away from where the spray foam applicator is working. The spray foam applicator has special skills that determine the success of the operation, however this person may not have access to real-time and sometimes critical system information that affect the quality of the spray foam <NUM> process. In addition, the spray foam applicator may lack the ability to make changes to operating parameters, or to stop and/or start the proportioning system without leaving the spray area. It is not efficient for the spray foam applicator to return to the proportioner system <NUM> to discover status or diagnostic information, or to make changes to the operating parameters related to the spray foam application system <NUM>. The spray gun operator wears Personal Protective Equipment (PPE) that further burdens his/her ability to return to the proportioner system <NUM> to adjust settings and/or determine status of the equipment and material supplies. The pressurized hoses <NUM>, <NUM>, <NUM>, <NUM>, <NUM> and/or <NUM> operate in a harsh environment and are subject to abuse typical of construction sites.

The techniques described herein include novel solutions to the issues outlined above, and present new unanticipated capabilities for fluid delivery systems, and in particular, to SPF systems such as system <NUM>. Other examples include paint spray systems, industrial/chemical mixing and processing, systems, and fuel and hydraulic delivery systems. Any process or system that uses a hose to transport fluids from one location to another and where communication of information to the user is desired, are candidates for the techniques described herein.

The flexible hoses <NUM>, <NUM>, <NUM>, <NUM>, <NUM> and/or <NUM> may not only provide for the delivery of fluids, but also for the delivery of electricity (e.g., electrical signals, electrical power). Likewise, the hose fittings <NUM>, <NUM> may not only connect the hoses <NUM>, <NUM>, and <NUM>, <NUM> to each other, but also deliver the electricity between the hoses <NUM> and <NUM> and the hoses <NUM> and <NUM>. To deliver electricity, the hoses <NUM>, <NUM>, <NUM>, <NUM>, <NUM> and/or <NUM> may include conductive elements. The fittings <NUM>, <NUM> may be made of metal and/or include crimping connections to the conductive elements of the hoses, also as further described below.

The hoses <NUM>, <NUM>, <NUM>, <NUM>, <NUM> and/or <NUM> may be used to communicatively couple master hub(s) to slave hub(s). For example, master hub <NUM> may be communicatively coupled to slave hubs <NUM>, <NUM>. Likewise, master hub <NUM> may be communicatively coupled to slave hubs <NUM>, <NUM>. The master hubs <NUM>, <NUM> may provide any information available in the proportioning system <NUM>, including temperatures, pressures, flow rates, types of compounds A and B, and so on.

The slave hubs, <NUM>, <NUM>, <NUM>, <NUM> may collect, process, and communicate certain parameters (e.g. fluid temperature and/or pressure) to the master hubs <NUM>, <NUM> that are at the proportioner <NUM>. This data can then be used to control pumps <NUM>, <NUM> and heating system <NUM> in the proportioner <NUM>, or in the spray foam hoses <NUM>, <NUM>, <NUM>, <NUM>, <NUM> and/or <NUM>, to provide optimum fluid conditions at or near the slave hubs <NUM>, <NUM>, <NUM>, <NUM>. The master hubs <NUM>, <NUM> can also communicate operating and/or equipment parameters to the slave hub(s) <NUM>, <NUM>, <NUM>, <NUM> that can be displayed to the spray foam applicator (e.g., the user of the spray gun <NUM>). An example of this would be providing an optical signal to the spray foam operator to indicate the status of the proportioning system <NUM>, remaining fluid remaining in bulk storage tanks <NUM>, <NUM> near the proportioner <NUM>, or pressure and temperature readings at or near the gun <NUM>. This approach can also allow the slave hubs <NUM>, <NUM>, <NUM>, <NUM> to act as a wireless (e.g. BLE) communication access point to local devices near the respective slave hub. Such devices could include wearable electronic displays with processors and wireless (BLE) capabilities that provide proportioner status indication and control of operating parameters. The slave hubs <NUM>, <NUM>, <NUM>, <NUM> can also be used to power and control indicator lights or light projectors <NUM>, <NUM> disposed on the hoses <NUM>, <NUM>, <NUM>, <NUM>, <NUM> and/or <NUM> and/or on gun <NUM> itself. Other lights (or light projectors) may be disposed on gloves, clothing, PPE, and so on, as further described below.

Turning now to <FIG>, the figure is a view of an embodiment of the gun <NUM> during use by a user <NUM>. As illustrated, the user <NUM> may be wearing protective equipment such as a suit <NUM>, respirator or filtered mask <NUM>, and gloves <NUM>. The user's field of vision <NUM> is also shown, representative of a work area viewable by the user <NUM>. With the techniques described herein, status indicator systems, e.g., lights or light projectors <NUM>, <NUM>, provide proportioner <NUM> status and optionally material <NUM>, <NUM>, supply status in a visual manner within the applicators field of vision. A color and optionally temporal nature of the light (e.g. flashing, steady, dimming, brightening), and number of light emitting devices (e.g., <NUM>, <NUM>) is used to provide feedback to the user on the status of the proportioning system <NUM>.

One example of status indication is as follows. When the proportioning system <NUM> is operating within specified control parameters (e.g. fluid pressure, temperature, and ratio) indicator light (or lights) <NUM>, <NUM> would display a steady green. If A <NUM> or B <NUM> fluid levels are approaching empty conditions, the light (or lights) <NUM>, <NUM>, would change to flashing green. If the proportioning system <NUM> was near the boundary of a defined tolerance range (e.g., near a temperature min/max, pressure min/max, flow rate min/max), the light (or lights) <NUM>, <NUM> would change to steady yellow. If the proportioner <NUM> was operating outside of a defined tolerance range (e.g., outside of a temperature min/max, pressure min/max, flow rate min/max), the light (or lights) <NUM>, <NUM> would change to flashing red. Finally, if the proportioning system <NUM> would benefit from immediate attention and cessation of foam application, the light (or lights) <NUM>, <NUM> would be changed to steady red color.

While a single light may communicate many proportioner system <NUM> conditions, two (or more) lights may provide even more information. As an example, if separate lights (e.g., <NUM>, <NUM>) are used on both A and B hoses, e.g., hoses <NUM>, <NUM>, <NUM>, <NUM>, <NUM> and/or <NUM>, the lights could operate independently to indicate the status of A <NUM> and B <NUM> fluid conditions independently. With this approach, the color, the temporal nature of the light (e.g. flashing, steady, dimming, brightening), and the number of light emitting devices can be used to convey a range of unique system states. Other status indicator systems such as projectors suitable for displaying visual information (e.g., text, images, video) may also be used to project the visual information onto the viewable area <NUM>.

<FIG> shows several embodiments of the techniques described herein. As shown, the indicating light emitting device (or devices) <NUM> could be associated with one or more hoses. Likewise, light emitting device (or devices) <NUM> may be placed on the gun <NUM>. Similarly, light emitting device (or devices) <NUM> may be placed on a wearable device to be carried by the user <NUM> on a wrist or hand. Additionally, light emitting device (or devices) <NUM> may be placed on or within the user's protective equipment of clothing. Finally, light emitting device (or devices) <NUM> is (are) used to project color, and optionally text, images, and/or video onto the target surface from a location on the gun <NUM>. The light display systems <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may include LED lights, laser lights, light projectors (including laser projectors) that display text, images, video, and/or predictive spray area (e.g., on the work area), and the like. Additionally the systems <NUM>, <NUM>, <NUM>, <NUM>, <NUM> that may be in close proximity to the user <NUM> may include haptic feedback systems so that the user may feel a tap, vibration, or the like, with tap frequency and/or force representative of certain information. It is to be also noted that the systems <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may be used alone or in combination with one another. Accordingly, the systems <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may be referred to as display systems and/or haptic systems.

In a first embodiment, which is not according to the claims, shown in <FIG>, the light emitting device <NUM> is integrated in the hose assembly at or near the connection to the spray gun <NUM>. Such a device <NUM> may include a light source, a power unit and controller for the light source, and/or optical elements to diffuse or project the light source in a manner that can be more easily detected by the applicator <NUM>. In one embodiment, the light source is a monochromatic or multi-spectral Light Emitting Diode (LED). The light source could also be several separate color LEDs combined in one small package. The light source may powered by separate conductors that attach to the proportioner <NUM> directly, by local energy storage (e.g. batteries), or by a voltage differential carried directly within or between hoses (e.g. in the metal reinforcement within the hose construction). The control of the light source can be provided via separate electrical or fiber optic conduits coupled to the proportioner <NUM>, by a wireless communication module attached to the hose, or by electrical signals that are communicated over conductive hose elements from the proportioner <NUM> to a small receiving device attached to the hose near the light emitting device <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. The light source could also be located remotely from the hose/gun connection area, but optically coupled to a diffusing element at the hose/gun connection area by means of a fiber optic element.

The second device <NUM> in <FIG> shows a similar approach that involves a light emitting device that is attached or integral to the gun <NUM>. As previously described, the light can be powered by wired connections to the proportioner <NUM>, by local energy storage devices, or by a voltage differential carried directly within the hose construction. Also as previously described, control of the light source can be over separate signal lines running to the proportioner <NUM>, by a wireless communication module attached to the hose, or by electrical signals that are communicated over conductive hose elements from the proportioner <NUM> to a small receiving device attached to the hose near the light emitting device <NUM>.

In the wearable device <NUM> of <FIG>, a similar approach may be used whereby indicator lights, icons, or symbols are within the field of vision of or worn by the applicator <NUM>. In this case, the wearable device <NUM> would be powered by an energy storage device, and status and control settings would be communicated to and from (respectively) the wearable device by a wireless communication module attached to the hose that receives and transmits the status signals over conductive hose elements from the proportioner. The wearable device <NUM> may also include haptic feedback, for example, via a vibrating motor.

In the device <NUM> of <FIG>, which is not according to the claims, the light source is contained within and/or projected onto the face mask used by the applicator <NUM>. As in device <NUM>, the light source would be powered by an energy storage device, and status would be communicated to the light source microcontroller by a wireless communication module attached to the hose that receives and transmits the status signals over conductive hose elements from the proportioner <NUM>. Projection onto the face mask may also include heads up display (HUD) techniques were text, images, video, colors, and the like, are projected so that a virtual display is available for viewing by the user <NUM>.

In the device <NUM>, the light source is projected onto the substrate directly in the viewing area of the applicator <NUM> from a source integral or attached to the spray gun <NUM>. As previously described, the light can be powered by wired connections to the proportioner <NUM>, by local energy storage devices, or by a voltage differential carried directly within the hose construction. In the same manner as previously described, control of the light source can be over separate signal lines running to the proportioner <NUM>, by a wireless communication module attached to the hose, or by electrical signals that are communicated over conductive hose elements from the proportioner <NUM> to a small receiving device attached to the hose near the light emitting device.

<FIG> is a side view of an embodiment of the gun <NUM> which may include various of the techniques described herein. Work light(s) <NUM> may include ultra-high intensity LED lights suitable for illuminating the work area. A heads up display port <NUM> may be used to inform the operator of certain conditions, such as ambient thermal conditions (e.g., work area temperature) and may communicate with a HUD in the operator's mask via wired and/or wireless techniques (e.g., Bluetooth, WiFi, mesh networking, and so on). A laser port <NUM> may include a laser suitable for projecting a spray pattern, such as a pattern of dots, a circle shape, and so on, representative of a predictive spray pattern based on distance to the spray surface, type of materials used for spraying (e.g., <NUM>, <NUM>), pressures, temperatures, flow rates, gun <NUM> nozzle, gun <NUM> type, and so on.

A status indicator <NUM> may change color to indicate status of hose and material being sprayed, such as levels of material <NUM>, <NUM>. The gun <NUM> may also include features to improve usability, such as an adjustable thumb-web rest <NUM> and an adjustable finger rest <NUM>. The adjustable thumb-web rest <NUM> may adjust fore and aft with a vertical rotation to better fit personal operator <NUM> preferences. The adjustable thumb-web rest <NUM> may additionally or alternatively relieve or eliminate carpal pressures due to gun <NUM> and/or hose weight. The adjustable finger rest <NUM> may adjust upwards and downwards along the gun's handle to improve operator fit and personal preferences.

As described earlier, different techniques may be used to provide power and communication signals to the light indicators. <FIG> shows one embodiment, whereby the light sources (which may be LEDs) are controlled and powered from the proportioner's <NUM> electronics. For example, an electronics module <NUM> (e.g., could be the control system <NUM> or a component of the control system <NUM>) may send power to LED lights <NUM>, <NUM> via conduits <NUM>, <NUM>. The lights <NUM>, <NUM> may be used to communicate status of material (e.g., levels of <NUM>, <NUM>) delivered via fluid pumps <NUM>, <NUM> and A and B hoses (e.g., hoses <NUM>, <NUM>, <NUM>, <NUM>, <NUM> and/or <NUM>).

<FIG> illustrates an embodiment, which is not according to the claims, where lights <NUM>, <NUM> are disposed on the proportioner <NUM> and controlled via the electronics module <NUM>. Fiber optic techniques may be used, such as fiber conduits <NUM>, <NUM>, to transmit light from the lights <NUM>, <NUM> to other light elements <NUM>, <NUM> disposed at various locations, such as the gun <NUM>, A, B hoses, and so on. By providing for a source of light at the proportioner <NUM>, it may be easier to maintain the lights and to change the lights during operations.

<FIG> illustrates an embodiment where the light emitter(s) <NUM>, <NUM> are powered and controlled from a small electronic "slave modem" <NUM> near the spray gun <NUM>, possibly (but not necessarily) attached to a spray hose A, B, to the spray gun <NUM>, or to a combination thereof. The slave modem <NUM> may receive power and/or communication signals from the proportioner electronics, e.g., from module <NUM>, and may then control the light emitters <NUM>, <NUM> based on the communications. In the depicted embodiment, conduits <NUM> are used to deliver the power and/or signals to the model <NUM>.

Claim 1:
A fluid delivery system, comprising:
a spray application system (<NUM>) comprising a proportioner system (<NUM>) configured to control a flow of a plurality of fluids to achieve a specified ratio of the plurality of fluids in a spray foam (<NUM>) of a spray gun (<NUM>) during operations, and to control a temperature of the fluids;
a display system (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>) configured to be mounted on the spray gun (<NUM>), worn by an operator (<NUM>), or a combination thereof, wherein the display system (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>) comprises a light emitting device (<NUM>), and the display system is configured to project a colored light onto a spray area of the spray gun (<NUM>); and
a status indicator system (<NUM>) comprising a processor (<NUM>), the processor configured to:
receive a first signal indicative of a first status of operations of the spray application system (<NUM>); and
provide to the operator of the spray gun (<NUM>), via the display system (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>), a visualization representative of the first status of operations, wherein the visualization comprises a color representative of the first status of operations,
wherein the proportioner system (<NUM>) is configured to communicatively couple to the status indicator system (<NUM>), and wherein the first status of operations comprises a status for the proportioner system (<NUM>).