sprayer

Abstract

A fluid dispense system (10) includes a spray rig (12) that is configured to pump material to a dispenser (14). The spray rig (12) includes a heater (24) disposed upstream of a pump (22), the heater (24) supported by a frame (16) of the spray rig (12). The spray rig (12) includes an electric pressure regulator (EPR) configured to control pressure of a hydraulic fluid to a driver that powers pumping by the pump (22).

Description

[0001]

[0002] SPRAYER CROSS-REFERENCE TO RELATED APPICATIONS This application claims priority to U.S. Provisional Application No. 63 / 747,593 filed January 21, 2025 and entitled “SPRAYER,” and claims priority to U.S. Provisional Application No. 63 / 778,037 filed March 26, 2025 and entitled “SPRAYER,” the disclosures of which are hereby incorporated by reference in their entireties.

[0003] BACKGROUND

[0004] The present disclosure concerns fluid dispense. More specifically, the present disclosure concerns multi-component dispensers.

[0005] The present disclosure relates to fluid dispensers, such as sprayers. Such sprayers can be used to spray a variety of materials. In particular, such sprayers can be used to spray multi-component materials. In such a sprayer, two or more component fluids are pumped separately and then combined and sprayed. Spray foam, typically created by mixing isocyanate and polyol resin components, is one broad type of sprayable plural component fluid. Plural components can also be glues, adhesives, coatings, and other materials. For example, epoxies can be sprayed. Individual constituent materials are flows to a dispenser, such as a spray gun, mixed within the dispenser to form a plural component material, and emitted as a single solution. The single solution can be referred to as a plural component material as it is formed from the multiple constituent components.

[0006] The constituent components are typically mixed in a spray gun and then sprayed in a matter of milliseconds due to the quick reacting and setting nature of the fluids. Mixing can occur within a mix chamber within the gun. The mix chamber can form part of the nozzle of the gun.

[0007] SUMMARY

[0008] According to an aspect of the present disclosure, a fluid sprayer that uses a hydraulic fluid for causing displacement of at least one spray fluid includes a hydraulic fluid reservoir for holding the hydraulic fluid; a hydraulic pump that receives the hydraulic fluid from the hydraulic fluid reservoir and outputs the hydraulic fluid under pressure: a pump section, the pump section comprising at least one pump for pumping the at least one spray fluid and a driver that receives the hydraulic fluid output by the hydraulic pump to operate the at least one pump to pump the at least one spray fluid; a valve that regulates flow of the hydraulic fluid between the hydraulic pump and the driver, the valve configured to be set at a pluralityof different settings that respectively correspond to different levels of flow through the valve; an electric actuator that sets the valve at the plurality of different settings: a sensor that measures a fluid parameter and outputs information based on the fluid parameter; and a controller that receives the information output by the sensor and, responsive at least in part to the information, operates the electric actuator to set the valve at the plurality of different settings.

[0009] According to an additional or alternative aspect of the present disclosure, a fluid sprayer that uses a hydraulic fluid for causing displacement of at least one spray fluid includes a hydraulic fluid reservoir for holding the hydraulic fluid; a hydraulic pump that receives the hydraulic fluid from the hydraulic fluid reservoir and outputs the hydraulic fluid under pressure; a pump section, the pump section comprising at least one pump for pumping the at least one spray fluid and a driver that receives the hydraulic fluid output by the hydraulic pump to operate the at least one pump to pump the at least one spray fluid; a valve that regulates flow of the hydraulic fluid between the hydraulic pump and the driver, the valve configured to be set at a plurality of different settings that respectively correspond to different levels of flow through the valve; an electric actuator that sets the valve at the plurality of different settings; a sensor that measures a fluid parameter and outputs information based on the fluid parameter; and a controller that receives the information output by the sensor and, responsive at least in part to the information, operates the electric actuator to set the valve at the plurality of different settings. The valve is disposed upstream of the driver and is configured to divide the hydraulic fluid received from the pump into a first portion and a second portion, the first portion directed to the driver and the second portion directed to the hydraulic reservoir while bypassing the driver.

[0010] According to another additional or alternative aspect of the disclosure, a fluid sprayer that uses a hydraulic fluid for causing displacement of at least one spray fluid includes a hydraulic fluid reservoir for holding the hydraulic fluid; a hydraulic pump that receives the hydraulic fluid from the hydraulic fluid reservoir and outputs the hydraulic fluid under pressure; a pump section, the pump section comprising at least one pump for pumping the at least one spray fluid and a driver that receives the hydraulic fluid output by the hydraulic pump to operate the at least one pump to pump the at least one spray fluid; a valve that regulates flow of the hydraulic fluid between the hydraulic pump and the driver, the valve configured to be set at a plurality of different settings that respectively correspond to different levels of flow through the valve; an electric actuator that sets the valve at the plurality of different settings; a sensor that measures a fluid parameter and outputsinformation based on the fluid parameter; and a controller that receives the information output by the sensor and, responsive at least in part to the information, operates the electric actuator to set the valve at the plurality of different settings. The valve is disposed on a branch line bypasses the driver such that the hydraulic fluid flowing through the valve bypasses the driver.

[0011] According to yet another additional or alternative aspect of the disclosure, a fluid sprayer for spraying a plural component material formed by a combination of a first component fluid and a second component fluid includes a first pump that pumps the first component fluid, the first pump comprising a first cylinder and a first piston that reciprocates within the first cylinder; a second pump that pumps the second component fluid, the second pump comprising a second cylinder and a second piston that reciprocates within the second cylinder; a first heater through which the first component fluid flows upstream of the first pump; a second heater through which the second component fluid flows upstream of the second pump; and a frame that supports each of the first pump, the second pump, the first heater, and the second heater. Relative to the frame, the first heater and the second heater are laterally inward of both of the first cylinder and the second cylinder.

[0012] According to yet another additional or alternative aspect of the disclosure, a fluid sprayer for spraying a plural component material formed by a combination of a first component fluid and a second component fluid includes a first pump that pumps the first component fluid, the first pump comprising a first cylinder and a first piston that reciprocates within the first cylinder; a second pump that pumps the second component fluid, the second pump comprising a second cylinder and a second piston that reciprocates within the second cylinder; a first heater through which the first component fluid flows upstream of the first pump; a second heater through which the second component fluid flows upstream of the second pump; and a frame that supports each of the first pump, the second pump, the first heater, and the second heater. The first heater and the second heater are disposed within a footprint of the frame.

[0013] BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 A is an isometric view of a spray system.

[0014] FIG. IB is a rear isometric view of a spray rig.

[0015] FIG. 1C is a top elevational view of a spray rig.

[0016] FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 1C.

[0017] FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1 A.FIG. 4 is a schematic diagram of a spray rig.

[0018] FIG. 5 is a schematic diagram showing components of a spray system.

[0019] FIG. 6 is a schematic diagram of a hydraulic system.

[0020] DETAILED DESCRIPTION

[0021] The present disclosure relates generally to material dispensing. More specifically, the present disclosure relates to components and controls for a material displacement system. The material displacement system is configured to provide material to a dispenser (e.g., spray gun) under pressure for application on a substrate. A spray rig is configured to output one or more materials under pressure to the dispenser.

[0022] According to various aspects of the disclosure, the spray rig includes heaters that are configured to heat the material prior to the material being emitted by the dispenser. The heaters can be supported by a frame of the spray rig that also supports other components of the spray rig. The frame of the spray rig can support one or more pumps that displace the material to the dispenser. In various examples, the pumps can extend laterally relative to the frame. The pumps include fluid displacers that can reciprocate along respective pump axes, which pump axes can be disposed coaxial with each other. According to some examples of the disclosure, the pumps can be configured as piston pumps, among other options.

[0023] According to various aspects of the disclosure, the heaters are disposed within a footprint of the frame of the spray rig. The heaters are disposed within the footprint of the frame laterally and front-to-back. The heaters can be disposed laterally inward of the pumps. The heaters can be disposed laterally inward of pump cylinders within which the pistons of the pumps reciprocate to displace the material. The heaters can be disposed radially inward of the piston heads of the pistons. The heaters are positioned to provide for a more compact and configuration of the spray rig. The in-board heaters can also reduce part count, providing material and cost savings.

[0024] According to various aspects of the disclosure, the one or more pumps of the spray rig that displace the material can be hydraulically powered. Hydraulic fluid can be pumped to a driver to cause pumping by the pumps. The hydraulic fluid can be pumped by a hydraulic pump. The hydraulic pump can be powered by an electric motor, among other options. According to various examples, the electric motor can be disposed vertically above the hydraulic pump. In some examples, the electric motor can be disposed fully vertically above the hydraulic pump. The axis of rotation of the electric motor can be disposed vertically.The flow of hydraulic fluid to the driver can be controlled to control the outputs from the pumps powered by the driver. In various examples, a pressure regulator controls flow of the hydraulic fluid to set a pressure output for the pumps. The pressure regulator can regulate the pressure of the hydraulic fluid to the driver, thereby setting a maximum pressure output from the pumps.

[0025] According to various aspects of the disclosure, the pressure regulator can be configured as an electronic pressure regulator (EPR). The EPR can include a valve and an electric actuator. The electric actuator is configured to set an opening condition of the valve to regulate the pressure of the hydraulic flow to the driver. In some examples, further opening of the valve causes increased hydraulic pressure to the driver, thereby increasing the pressure output from the pumps. In some examples, further opening of the valve causes decreased hydraulic pressure to the driver, thereby decreasing the pressure output from the pumps.

[0026] According to some aspects of the disclosure, the hydraulic pump is configured to provide a constant output. The electric motor powering the hydraulic pump can operate at a constant speed to cause the hydraulic pump to provide the constant, steady output. The EPR can be configured to control the pressure to the driver by causing the output from the hydraulic pump to split into a return flow that is routed to a hydraulic reservoir and bypasses the driver and into a driving flow that is routed to the driver to power the driver. The EPR can regulate the splitting, directly or indirectly, to control the pressure output from the pumps.

[0027] The present disclosure relates to material dispensers, which are referred to as spraying the material by way of example and not limitation. Such sprayers can be used to spray a variety of materials. In particular, such sprayers can be used to spray multicomponent materials. In various examples, two component fluids are pumped separately and then combined and emitted, such as by spraying. The main example presented herein is that of a plural component foam sprayer in which an isocyanate (typically labeled as "A") and polyol resin (labeled as "B") are separately pumped and then mixed in a dispenser (e.g., spray gun) and sprayed as a foam that quickly cures. Other examples of multi component sprayers are for spraying polyurea and / or epoxy, amongst other options. While the aspects presented herein are applicable to such spray foam applications, the aspects are not limited to spray foam. Such aspects may be relevant to a single component sprayer. Further, the aspects discussed herein can be applicable to dispensing systems other than sprayers, such as systems that emit the material as a stream or bead, among other options.The present disclosure uses multiple examples to demonstrate various inventive aspects. The inventive scope of this disclosure is not necessarily limited to any one of these embodiments, nor to all of them in just the manner shown and / or described. Rather, the inventive aspects demonstrated herein can be implemented in various other manners. One aspect or feature shown or described from one embodiment could be implemented on another embodiment in this disclosure even if not shown or described for that embodiment, or various embodiments not illustrated herein. The embodiments illustrated and / or discussed are intended to be illustrative and not limiting, and the described and / or illustrated features can be mixed and matched between different embodiments but including and excluding various features amongst the embodiments.

[0028] Components with common reference numbers can be structurally and functionally equivalent except to the limited extent specifically shown and / or described to be different. As such, aspects discussed and / or shown in connection with one embodiment can be present in another embodiment even if not discussed and / or shown for the other embodiment, particularly when common reference numbers are used.

[0029] Components can be considered to radially overlap when those components are disposed at common axial locations along an axis. A radial line extending from the axis will extend through each of the radially overlapping components. Components can be considered to axially overlap when those components are disposed at common radial and circumferential locations relative to an axis such that an axial line parallel to the axis extends through the axially overlapping components. Components can be considered to circumferentially overlap when aligned about the axis, such that a circle centered on the axis passes through the circumferentially overlapping components.

[0030] FIG. 1 A is an isometric view of spray system 10. FIG. IB is a rear isometric view of spray rig 12. FIG. 1C is a top plan view of spray rig 12. FIGS. 1A-1C are discussed together. Spray system 10 includes spray rig 12 and dispenser 14. Frame 16, user interface 18, hydraulic system 20, pump section 22, and heaters 24a, 24b (collectively herein “heater 24’’ or “heaters 24’’) of spray rig 12 are shown. Pump section 22 includes pumps 26a, 26b (collectively herein “pump 26” or “pumps 26”) and driver 28. Pump cylinders 56a, 56b of pumps 26a, 26b are shown. Motor 30, hydraulic pump 32, and hydraulic reservoir 34 of hydraulic system 20 are shown.

[0031] The lateral sides 36a, 36b, front side 38, and rear side 40 of the spray rig 12 are indicated. Spray rig 12 is configured to output material to dispenser 14. In the example shown, dispenser 14 is configured as a spray gun, though it is understood that not allexamples are so limited. Supply hoses 42 extend between pumps 26a, 26b and dispenser 14 to provide the pumped material to the dispenser 14. In the example shown, dispenser 14 is configured as a handheld gun that allows one-handed spraying of the foam or other spray material. Dispenser 14 includes handle 44 that can be grasped by the user and trigger 46 that can be pulled to cause spraying by the dispenser 14.

[0032] In the example shown, spray system 10 is configured to emit a plural component material formed by two component materials that are mixed together. The two component materials can be mixed inside of the dispenser 14. The two component materials are pumped from spray rig 12. The dispenser 14 is connected to the spray rig 12 via two supply hoses 42. While spray system 10 is described as a plural component system, it is understood that not all examples are so limited. For example, spray system 10 can be a single component system in which the pumped component material is emitted without mixing. In various other examples, spray system 10 can be configured as a plural component system in which more than two component materials arc mixed to form the plural component material.

[0033] Frame 16 is configured to support other components of spray rig 12. The frame 16 can rest on the ground and support the remainder of the components discussed herein (excluding the dispenser 14 and the supply hoses 42). The frame 16 can be composed of a plurality of tubes, such a square tubes, connected together to form a base and vertical supports to support the components as shown. In the example shown, frame 16 includes base 48 and vertical support 50. Base 48 is configured to rest on a support surface, such as the ground. The vertical support 50 extends from the base 48 and can support other components of spray rig 12. The frame 16 can be considered to define the footprint of the spray rig 12. In some examples, the base 48 can be considered to define the footprint of the spray rig 12.

[0034] User interface 18 is supported by frame 16. User interface 18 can include one or more inputs for receiving user selections. For example, the user interface 18 can include a touchscreen, dial, buttons, and other inputs for receiving a target parameter setting, such as a target pressure. The target parameter setting can correspond to a desired output of the pumps 26a, 26b for the component materials, which can be referred to herein as an A-material and a B-materiaL

[0035] Spray rig 12 includes at least one pump 26. In the example shown, spray rig 12 includes a first pump 26a and a second pump 26b. The first pump 26a and the second pump 26b are driven out of phase with respect to each other by driver 28. More specifically,while the first pump 26a is going through a suction stroke, the second pump 26b is also being driven through a pumping stroke by the driver 28, and the driver 28 eventually reverses such that the first pump 26a is moving through its pumping stroke while the second pump 26b is moving through its suction stroke. In the example shown, pump 26a moves through a suction stroke in axial direction AD2 while pump 26b moves through a pumping stroke in axial direction AD2. Pump 26a moves through a pumping stroke in axial direction ADI while pump 26b moves through a suction stroke in axial direction ADI.

[0036] The pumps 26a, 26b can be mechanically fixed together for simultaneous displacement by the driver 28. In some examples, pumps 26a, 26b are configured as single displacement pumps in which the pump 26a, 26b outputs fluid during the pumping stroke and not the suction stroke. In some examples, pumps 26a, 26b are configured as double displacement pumps in which the pump 26a, 26b outputs fluid during both the pumping stroke and the suction stroke. As further explained herein, driver 28 is hydraulically driven. Pump cylinders 56a, 56b of the pumps 26a, 26b arc shown. Pump cylinders 56a, 56b at least partially define one or more chambers through which the material is pumped by the pump 26a, 26b. A fluid displacer (e.g., piston among other options) of the pump 26a, 26b is configured to reciprocate within the pump cylinder 56a, 56b to displace the material.

[0037] Hydraulic system 20 is configured to provide hydraulic fluid to driver 28 under pressure to cause pumping by the pumps 26a, 26b. Hydraulic reservoir 34 is configured to hold a supply of hydraulic fluid (e.g., non-compressible hydraulic oil). Hydraulic pump 32 is fluidly connected to hydraulic reservoir 34 and is configured to pump the hydraulic fluid to the driver 28 to cause pumping by the pumps 26a, 26b.

[0038] Motor 30 is connected to hydraulic pump 32 and is configured to cause pumping by hydraulic pump 32. Motor 30 can be configured as an electric motor. The motor 30 powers the hydraulic system 20 as further discussed herein. Motor 30 can be any type of electric motor such as a radial flux motor, brushless motor, brushed motor, amongst other options.

[0039] In the example shown, motor 30 is disposed vertically above hydraulic pump 32. Motor 30 can be at least partially vertically above the hydraulic pump 32. In some examples, motor 30 can be disposed fully vertically above the hydraulic pump 32. Motor 30 can be disposed such that a rotational axis of the rotor of the motor 30 is oriented vertically. The rotational axis of the motor 30 can, in various examples, be disposed parallel to the vertical axis VA. The vertical stacking of the motor 30 above the hydraulic pump 32 provides for a compact configuration laterally and front-to-back for spray rig 12.During operation, hydraulic fluid is stored in the hydraulic reservoir 34. The electric motor 30 outputs rotational motion to the hydraulic pump 32 to put the hydraulic fluid under pressure and hydraulic pump 32 outputs the hydraulic fluid under pressure to the driver 28, as further discussed herein. The pressurized hydraulic fluid causes the driver 28 to displace fluid displacers (e.g., pistons among other options) of the pumps 26a, 26b to cause pumping by the pumps 26a, 26b. A pressure output by the pumps 26a, 26b can be controlled by controlling a pressure of the hydraulic fluid provided to the driver 28.

[0040] Heaters 24a, 24b are configured to heat the component materials at locations upstream of the pumps 26a, 26b. As best seen in FIG. IB, a first heater 24a and a second heater 24b are onboard the spray rig 12 and are supported by the frame 16. The first heater 24a and the second heater 24b are used for heating the component fluids upstream of the first pump 26a and the second pump 26b, respectively. The component fluids are stored off of the spray rig 12 and are pumped through feed hoses (not shown) to the rig 12. Each component material is pumped through one of the heaters 24a, 24b before flowing to one of the pumps 26a, 26b. Heating the component fluids allows better flow of the fluids, which can otherwise be difficult to pump and flow due to their viscosity. It is noted that the first heater 24a and second heater 24b are respectively located in the back right and back left corners of the footprint of the frame 16.

[0041] In some examples, heaters 24a, 24b can be considered to form primary heaters within the spray system 10. The supply hoses 42 can be heated hoses that include heating elements. The heaters 24a, 24b can be configured to bring the component materials up to temperature while the secondary heaters of the supply hoses 42 can be configured to maintain the temperature of the component materials.

[0042] Each heater 24a, 24b includes a body block 52 that is supported by the frame 16. The body block 52 can support heating rods (four for each heater 24a, 24b in this example) that are vertically orientated and inserted into passages within respective body blocks 52 of the first heater 24a and the second heater 24b. The body blocks 52 can be formed from metal.

[0043] In the example shown, the heaters 24a, 24b are disposed within the footprint of the frame 16. The heaters 24a, 24b are disposed forward of the rear side 40 of the frame 16. The heaters 24a, 24b are disposed laterally inward of the lateral sides 36a, 36b of the frame 16. The heaters 24a, 24b are disposed rearward of the front side 38 of the frame 16. In the example shown, the heaters 24a, 24b are disposed over the base 48 and do not project laterally, forward, or rearward outward from the base 48. The heaters 24a, 24b beingdisposed within the footprint of the frame 16 provides for a compact configuration. Such heaters 24a, 24b also eliminate additional covers or shrouds that would be required for heaters 24a, 24b outside of frame 16, thereby providing material and cost savings.

[0044] The pumps 26a, 26b are disposed forward of the heaters 24a, 24b. The pump 26a, 26b are located laterally (left-right) outward with respect to the heaters 24a, 24b. The pumps 26a, 26b project outward such that the pumps 26a, 26b are disposed at least partially outside of the footprint of the frame 16. In the example shown, the pumps 26a, 26b are oriented laterally while the heaters 24a, 24b are oriented vertically. In the example shown, the pumps 26a, 26b are oriented horizontally while the heaters 24a, 24b are oriented vertically.

[0045] The heaters 24a, 24b are disposed rearward of the pumps 26a, 26b and are laterally inward of the pump cylinders 56a, 56b of the pumps 26a, 26b. The heaters 24a, 24b are not disposed directly laterally between the pump cylinders 56a, 56b. Instead, the heaters 24a, 24b, arc disposed rearward of the pump cylinders 56a, 56b and laterally inward of the pump cylinders 56a, 56b.

[0046] In the example shown, the hydraulic pump 32 and the motor 30 are disposed between the heaters 24a, 24b and the pump section 22. Hydraulic pump 32 and motor 30 are disposed rearward of the pumps 26a, 26b. Reservoir 34 is disposed rearward of the pumps 26a, 26b. Heaters 24a, 24b are disposed rearward of the hydraulic pump 32 and the motor 30. Heaters 24a, 24b are disposed rearward of the reservoir 34.

[0047] Containing the heaters 24a, 24b within the footprint of the frame 16 allows for a more compact design, whereas the pumps 26a, 26b which do extend laterally outward from the frame 16 are well off the ground and are at an ideal working height for an operator. The heaters 24a, 24b do not need to be operated / accessed on a frequent basis by the user, and thus are conveniently within the footprint of the frame 16 and laterally inward of the pumps 26a, 26b, and are located lower than the pumps 26a, 26b.

[0048] FIG. 2 is a cross-sectional view of spray rig 12 taken along line 2-2 in FIG. 1C. The view in FIG. 2 is a sectioned view through pumps 26a, 26b and driver 28. Pump 26a includes piston 54a and pump cylinder 56a. Pump 26b includes piston 54b and pump cylinder 56b. Each piston 54a, 54b includes piston shaft 58 and piston head 60. Driver 28 includes hydraulic cylinder 62 and disk 64.

[0049] Pumps 26a, 26b are supported by frame 16. Pumps 26a, 26b project laterally outward from driver 28 and are disposed on opposite lateral sides of the driver 28. The driver 28 is disposed directly laterally between the pumps 26a, 26b in the example shown.Piston 54a is configured to reciprocate within pump cylinder 56a to pump the A-materiaL Piston 54a reciprocates along pump axis PAI to pump the material. Piston 54b is configured to reciprocate within pump cylinder 56b to pump the B-material. Piston 54b reciprocates along pump axis PA2 to pump the material. In the example shown, piston heads 60 divide the respective pump cylinders 56a, 56b into multiple pumping chambers. The pump axes PAI, PA2 are disposed horizontally in the example shown. The pump axes PAI, PA2 can be disposed coaxially. In the example shown, both pump axes PAI, PA2 are disposed coaxially with common axis CA. The common axis CA is horizontally orientated.

[0050] The pump cylinders 56a, 56b extend laterally outward beyond the footprint of the frame 16. Each pump cylinder 56a, 56b includes an inner end 66, an outer end 68, and a mid-point 70 intermediate the inner end 66 and the outer end 68. The outer end 68 is the laterally outer side of the pump cylinder 56a, 56b while the inner end 66 is the laterally inner side of the pump cylinder 56. In the example shown, the pump cylinders 56a, 56b are disposed such that at least the outer end 68 and the mid-point 70 of each pump cylinder 56 is laterally outward of the frame 16. The heaters 24a, 24b are disposed laterally between the outer ends of the pump cylinders 56a, 56b. The heaters 24a, 24b are disposed laterally between the mid-points 70 of the pump cylinders 56a, 56b. In various examples, the heaters 24a, 24b are disposed laterally inward of the inner ends 66 of the pump cylinders 56a, 56b.

[0051] Each pump 26a, 26b includes a set of check valves 72 that prevent retrograde flow. The material is drawn into the pump 26a, 26b through an inlet one of the check valves 72. The material is output from the pump 26a, 26b through an outlet one of the check valves 72. In the example shown, the heaters 24a, 24b are disposed laterally inward of at least one check valve 72 of each pump 26a, 26b. The heaters 24a, 24b can be disposed laterally inward of both the inlet and outlet check valves 72 of each pump 26a, 26b. In the example shown, the check valves 72 are disposed on a laterally outer end of each pump 26a, 26b, though it is understood that not all examples are so limited.

[0052] Pump 26a is aligned with pump 26b such that the reciprocation of piston 54a is aligned with the reciprocation of piston 54b. The driver 28 is also shown in cross-section in which a sealing disk 64 reciprocates within hydraulic cylinder 62. The sealing disk 64 is connected (e.g., by couplings) to the pistons 54a, 54b. The disk 64 is connected to the pistons 54a, 54b such that movement of the disk 64 along the common axis CA causes the pistons 54a, 54b to displace along the common axis CA. Hydraulic fluid is alternately introduced to the drive chambers 74a, 74b on the left and right sides of the sealing disk 64within the hydraulic cylinder 62 of the driver 28 to force the sealing disk 64 to reciprocate left and right to move the pistons 54a, 54b alternately left and right through respective suction and pumping strokes to pump the component materials through the supply hoses 42.

[0053] FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. IB. The view in FIG.

[0054] 3 is a section taken through heater 24b. It is understood that heater 24a can be structurally identical to the second heater 24b.

[0055] In the example shown, the heaters 24a, 24b include heating rods 80 (four for each heater 24a, 24b in this example) that are vertically orientated and inserted into passages 76 within respective body blocks 52 of the first heater 24a and the second heater 24b. Each heating rod 80, and the body blocks 52 that contain the heating rods 80, are vertically orientated. The body blocks 52 can be formed from metal. In the example shown, four heating rods are located in respective body blocks 52 for the first heater 24a and second heater 24b.

[0056] Body block 52 includes passages 76 that are oriented vertically. Passages 76 are disposed vertically and extend along a vertical axis VA. The passages 76 can be considered to be parallel to the vertical axis VA. Heating rods 80 are disposed at least partially within the passages 76. In various examples, turbulators 78 are disposed within the passage 76. The turbulator 78 is disposed between the heating rod 80 and the wall of the passage 76. The turbulator 78 is configured to induce turbulence into the material flowing through the heater 24, providing for more efficient thermal transfer. In various examples, the heater 24 can be configured such that the material flows serially through the multiple passages 76 within body block 52. In the example shown, the fluid flows vertically parallel with axis VA in the heaters 24a, 24b.

[0057] Comparing the pump axes PAI, PA2 (FIG. 2) and the heater axis VA, it is shown that the pump axis PAI, PA2 is transverse to the heater axis VA. The pump axis PAI, PA2 is horizontal while the heater axis VA is vertical. The pump axis PAI, PA2 is orientated orthogonal to the heater axis VB, although the pump and heater axes are offset from each other and do not intersect.

[0058] FIG. 4 is a schematic diagram showing various components of spray rig 12. The view shown in FIG. 4 shows forward direction FD, rearward direction RD, a first lateral direction LD1, and a second lateral direction LD2. The sealing disk 64 is represented within the driver 28. As shown, pumps 26a, 26b project laterally outward relative to frame16. Heaters 24a, 24b are disposed laterally inward of the laterally outer sides 36a, 36b of the frame 16.

[0059] Hydraulic system 20 is configured to provide hydraulic fluid to driver 28 to cause pumping by pumps 26a, 26b. Divider valve 82 is shown. Divider valve 82 is configured to route the hydraulic fluid to / from the drive chambers 74a, 74b of the driver 28. In some examples, divider valve 82 can be configured as a three-way valve that can route fluid to and from the drive chambers 74a, 74b. Divider valve 82 can fluidly connect a drive chamber 74a, 74b to hydraulic reservoir 34 to provide a return flow of hydraulic fluid from driver 28 to hydraulic reservoir 34.

[0060] Limit switches 84a, 84b are shown. Limit switches 84a, 84b, which can be mechanical switches or electrical switches that operate mechanical or electric valves, are configured to indicate when the particular stroke left or right has moved far enough to flip the divider valve 82 to alternate between supplying the drive chamber 74a and the drive chamber 74b of the driver 28 with the hydraulic fluid.

[0061] Sensors 86a, 86b are operably associated with pumps 26a, 26b. Sensors 86a, 86b are configured to generate information regarding the material outflow from pumps 26a, 26b. Sensor 86a can measure a fluid parameter of the output of pump 26a. Sensor 86b can measure a fluid parameter of the output of pump 26b. The measured fluid parameter can be pressure (e.g., pounds per square inch (psi) of the component material being output from the pump 26a, 26b). The measured fluid parameter can be flow rate. It is noted that the hydraulic fluid may not principally flow through the sensor 86a, 86b, but rather the sensors 86a, 86b tap into respective conduits downstream of the pumps 26a, 26b sufficient to measure the fluid parameter of the respective outputs of the pumps 26a, 26b. The sensors 86a, 86b are not configured to directly sense the pressure of the hydraulic fluid. The pressure of the hydraulic fluid can be determined based on the pressure output by the pumps 26a, 26b and measured by the sensors 86a, 86b. It is noted that in some cases, only a single fluid sensor (e.g., only one of sensors 86a, 86b) may be present such that the other sensor (other one of sensors 86a, 86b) may be absent.

[0062] During operation, respective flows of hydraulic fluid are channeled into the left and right drive chambers 74a, 74b of the driver 28 to push the sealing disk 64 left and right to consequently move the pistons 54a, 54b left and right within pump cylinders 56a, 56b to operate the pumps 26a, 26b.

[0063] Heater 24a is disposed laterally inward relative to the pump cylinder 56a of pump 26a. Heater 24a can be disposed fully laterally inward relative to pump cylinder 56a. Theheater 24a is disposed fully laterally inward of a mid-point 70 of the pump cylinder 56a. The heater 24a is disposed fully laterally inward of an outer end 68 of the pump cylinder 56a. Heater 24b is disposed laterally inward relative to the pump cylinder 56b of pump 26b. Heater 24b can be disposed fully laterally inward relative to pump cylinder 56b. The heater 24b is disposed fully laterally inward of a mid-point 70 of the pump cylinder 56b. The heater 24b is disposed fully laterally inward of an outer end 68 of the pump cylinder 56b. In various examples, the heaters 24a, 24b do not overlap forward and rearward with the pump cylinders 56a, 56b. In the example shown, the heaters 24a, 24b are disposed laterally between the pump cylinders 56a, 56b but are not directly laterally between the pump cylinders 56a, 56b. Such a configuration allows for a more compact configuration of spray rig 12, providing for easier positioning and use at a worksite.

[0064] In the example shown, heaters 24a, 24b are rearward of the pumps 26a, 26b. The heaters 24a, 24b are disposed rearward of pumps 26a, 26b and forward of the rear side 40 of the frame 16. The heaters 24a, 24b arc also disposed rearward of the hydraulic reservoir 34. Heaters 24a, 24b are disposed rearward of the hydraulic pump 32 and the motor 30. Electric motor 30 and hydraulic pump 32 are between (front- to- back) the heaters 24a, 24b on the rearward side and the pumps 26a, 26b on the forward side.

[0065] FIG. 5 is a schematic illustration of spray system 10. Hydraulic system 20, pumps 26a, 26b, driver 28, motor 30, hydraulic pump 32, hydraulic reservoir 34, switches 84a, 84b, sensors 86a, 86b, divider valve 82, pressure regulator 88, bypass line 90, return line 92, supply line 94, controller 96, user interface 18, supply hoses 42, and dispenser 14 of spray system 10 are shown. Pressure regulator 88 includes valve 98 and electric actuator 100. Controller 96 includes control circuitry 102 and memory 104.

[0066] Pumps 26a, 26b are fluidly connected to material reservoirs (not shown) that store the individual component materials. Feed pumps (not shown) can pump the component materials from the material reservoirs to the pumps 26a, 26b through feed hoses. As such, the pumps 26a, 26b can be configured to receive the material under pressure. Pumps 26a, 26b are fluidly connected to dispenser 14 to provide the component materials to dispenser 14. As shown, dispenser 14 includes a mixer 106 within which the component materials mix to form the plural component material. The plural component material is emitted from the dispenser 14 (e.g., as a spray) and applied to a substrate on which the plural component material can cure.

[0067] Hydraulic system 20 is configured to cause pumping by pumps 26a, 26b. The hydraulic system 20 is configured to regulate the material pressure output by pumps 26a,26b. The hydraulic system 20 is configured to route hydraulic fluid to and from the driver 28 to cause pumping by the pumps 26a, 26b.

[0068] A supply of hydraulic fluid is stored in hydraulic reservoir 34. The hydraulic pump 32 is configured to pump the hydraulic fluid through hydraulic system 20. The hydraulic system 20 is closed in that the hydraulic fluid is drawn from and returned to hydraulic reservoir 34. Motor 30 is configured to power pumping by hydraulic pump 32. Motor 30 is operatively connected to hydraulic pump 32 to cause pumping by hydraulic pump 32.

[0069] Supply line 94 is fluidly connected to hydraulic pump 32 and is configured to provide hydraulic fluid to the driver 28. In the example shown, there are multiple supply lines 94a, 94b extending from hydraulic pump 32. Supply lines 94a, 94b can be alternatives in various examples such that only one of supply line 94a and supply line 94b is present. For example, a configuration of system 20 can include supply line 94a and not include supply line 94b while another configuration of system 20 can include supply line 94b and not include supply line 94a.

[0070] In the example shown, divider valve 82 is configured to alternatingly route hydraulic fluid to the driver chambers 74a, 74b of the driver 28 to cause reciprocation of the fluid displacers (e.g., pistons 54a, 54b) of the pumps 26a, 26b.

[0071] Return line 92 is configured to route a return flow of hydraulic fluid from driver 28 to hydraulic reservoir 34. It is understood that, while return line 92 is shown as extending from driver 28, the return line 92 can, in some examples, extend to divider valve 82 and then downstream from divider valve 82 back to hydraulic reservoir 34.

[0072] While a single return line 92 for return of hydraulic fluid from driver 28 is shown going from the driver 28 to the hydraulic reservoir 34, in some examples two lines would travel from the driver 28 to the hydraulic reservoir 34, representing output lines on the respective left and right sides of the driver 28 with the sealing disk 64 traveling between them.

[0073] Bypass line 90 is configured to return hydraulic fluid to the hydraulic reservoir 34. Bypass line 90 can also be referred to as a second return line while return line 92 forms a first return line. Bypass line 90 is configured to route a portion of the hydraulic fluid output by hydraulic pump 32 back to hydraulic reservoir 34 without that portion of the hydraulic fluid passing through driver 28.

[0074] The bypass line 90 can return hydraulic fluid that is diverted by the pressure regulator 88 back to the hydraulic fluid hydraulic reservoir 34 in various examples. The bypass line 90 can, in some examples, extend from valve 98 to hydraulic reservoir 34, suchas with bypass line 90 including portion 90a. The bypass line 90 can, in some examples, extend from hydraulic pump 32 back to hydraulic reservoir 34, such as with bypass line 90 including portion 90b. It is understood that other various hydraulic circuit configurations are possible within the scope of the disclosure.

[0075] In some examples, the hydraulic fluid can flow through valve 98 with valve 98 routing a first portion to driver 28 and routing a second portion to hydraulic reservoir 34 through bypass line 90.

[0076] In some examples, valve 98 can provide a signal to one or more other components (e.g., a diversion valve and / or a swash plate) of the hydraulic pump 32 to control an output of the hydraulic pump 32. It is understood that the signal can be flow / pressure of the hydraulic fluid as controlled by the valve 98.

[0077] In the example shown, supply line 94b is shown in dashed lines. Supply line 94b represents an alternative supply arrangement in which the hydraulic fluid provided to the driver 28 docs not flow through the valve 98 upstream of the driver 28. In such an example, the supply line 94a between valve 98 and divider valve 82 may not be present. Instead, the hydraulic flow through valve 98 can be routed back to hydraulic reservoir 34 with no portion of that hydraulic flow being routed to the driver 28.

[0078] In such an example, the pressure regulator 88 is configured such that flow through the valve 98 bypasses the driver 28. In such an example, the valve 98 can be considered to provide a hydraulic signal that controls the outflow of hydraulic fluid to driver 28. In some examples, the opening amount of the valve 98 controls a back pressure between the valve 98 and the hydraulic pump 32. The back pressure can control the position of a diverter valve 110 (which may not be present in all examples) that controls the portion of the outflow from hydraulic pump 32 through supply line 94b and that is provided to driver 28. In some examples, the outflow from the valve 98 is provided back to hydraulic pump 32 to set the position of the diverter valve 110. For example, the bypass line 90 can route back to the hydraulic pump 32 rather than or in addition to the hydraulic reservoir 34 to provide the hydraulic signal to the diverter valve 110, as shown by bypass line 90b in dashed lines.

[0079] Sensors 86a, 86b are configured to generate information regarding a fluid parameter of the material output by pumps 26a, 26b. Sensor 86a is associated with the output from pump 26a. Sensor 86b is associated with the output from pump 26b. The fluid parameter can be pressure, flow rate, among other options. The hydraulic fluid is not routed to sensors 86a, 86b. The sensors 86a, 86b do not directly measure fluid parameters of the hydraulic fluid. While two sensors 86a, 86b are shown, it is understood that spray system 10 caninclude only a single sensor 86a, 86b. For example, sensor 86a may be present and sensor 86b may be omitted. In the case of there being both sensors 86a, 86b, then both the outputs can be provided to controller 96. In the case of a single sensor 86a, 86b, then only the one output from that single sensor 86a, 86b is provided to the controller 96.

[0080] Pressure regulator 88 is configured to regulate a pressure of the hydraulic fluid provided to the driver 28, thereby regulating the material pressure output by pumps 26a, 26b. Pressure regulator 88 can also be referred to as an electronic pressure regulator (EPR) that is electrically operated to control flow of the hydraulic fluid. The EPR is a combination of the valve 98 and the electric actuator 100. Valve 98 is actuatable between a maximum flow state and a minimum flow state (which can be no flow, though in some examples the minimum flow state is associated with at least some greater than zero flow). The valve 98 can be placed at positions between the maximum and minimum flow states to vary the flow of hydraulic fluid to the driver 28. Electric actuator 100 is configured to actuate the valve 98 between various opening states to regulate the flow of the hydraulic fluid. In various configurations, the valve 98 is a needle valve and the electric actuator 100 is a solenoid which can actuate the needle valve to different states of openness to restrict or permit different pressures and / or volumes of flow of hydraulic fluid through the valve 98.

[0081] Controller 96 is operatively connected to various components of spray system 10, electrically or communicatively, to control operation of components of spray system 10. Controller 96 can be of any desired configuration for controlling operation of spray system 10. Controller 96 is operatively connected to pressure regulator 88 to control the opening of valve 98. Controller 96 is operatively connected to electric actuator 100 and is configured to provide commands to electric actuator 100 to cause opening / closing of valve 98, thereby controlling flow of hydraulic fluid to driver 28

[0082] Memory 104 is configured to store software that, when executed by control circuitry 102, controls pressure regulator 88. For example, control circuitry 102 can include one or more of a microprocessor, a controller, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a graphics processing unit (GPU), a system-on-module (SOM), or other equivalent discrete or integrated logic circuitry.

[0083] Memory 104, in some examples, is described as computer-readable storage media. In some examples, a computer-readable storage medium can include a non-transitory medium. The term “non-transitory” can indicate that the storage medium is not embodied in a carrier wave or a propagated signal. In certain examples, a non-transitory storagemedium can store data that can, over time, change (e.g., in RAM or cache). In some examples, memory 104 is a temporary memory, meaning that a primary purpose of memory 104 is not long-term storage. Memory 104, in some examples, is described as volatile memory, meaning that memory 104 does not maintain stored contents when power to controller 96 is turned off. Examples of volatile memories can include random access memories (RAM), dynamic random access memories (DRAM), static random access memories (SRAM), and other forms of volatile memories. Memory 104, in one example, is used by software or applications running on control circuitry 102 to temporarily store information during program execution. Memory 104, in some examples, also includes one or more computer-readable storage media. Memory 104 can further be configured for longterm storage of information. Memory 104 can be configured to store larger amounts of information than volatile memory. In some examples, memory 104 includes non-volatile storage elements. Examples of such non-volatile storage elements can include magnetic hard discs, optical discs, floppy discs, flash memories, or forms of electrically programmable memories (EPROM) or electrically erasable and programmable (EEPROM) memories.

[0084] User interface 18 can be any graphical and / or mechanical interface that enables user interaction with controller 96. For example, user interface 18 can implement a graphical user interface displayed at a display device of user interface 18 for presenting information to and / or receiving input from a user. User interface 18 can include graphical navigation and control elements, such as graphical buttons or other graphical control elements presented at the display device. User interface 18, in some examples, includes physical navigation and control elements, such as physically actuated buttons or other physical navigation and control elements. In general, user interface 18 can include any input and / or output devices and control elements that can enable user interaction with controller 96.

[0085] The controller 96 can include any type of control circuitry 102. The controller 96 can include memory and processor(s) and / or other type of logic circuitry for performing any function referenced herein. The controller 96 can receive inputs from the user interface 18. For example, a user supplied fluid parameter setting (e.g., pressure and / or flow rate) can be input via the user interface 18 and can then be stored in the controller 96. Such a command can provide a target parameter for output from the pumps 26a, 26b, such as a target pressure for the component material. In a closed loop manner, as further discussed herein, the controller 96 can operate the electric actuator 100 to modulate the position of the valve 98 to directly or indirectly control the flow of hydraulic fluid to the driver 28 tocontrol the outputs of the pumps 26a, 26b to achieve the set pressure and / or flow rate as the outputs of the pumps 26a, 26b.

[0086] As further discussed herein, the position of the valve 98 is modulated by the electric actuator 100 which, directly or indirectly, controls the flow and / or pressure of hydraulic fluid acting on the driver 28, which in turn determines the pressure (and / or volume) output from the pumps 26a, 26b.

[0087] Hydraulic pump 32 receives hydraulic fluid from the hydraulic reservoir 34. The hydraulic pump 32 is operated by the electric motor 30. In various examples, the electric motor 30 constantly runs while the spray system 10 is powered on, regardless of whether the trigger 46 of the dispenser 14 is actuated. For example, when the trigger of the dispenser 14 is actuated, plural component material is being sprayed, and the electric motor 30 is on (outputting rotational motion). But as the trigger of the dispenser 14 is released and the dispenser 14 stops spraying, internal valves of the dispenser 14 are closed, presenting a deadhead condition (complete blockage to flow) for the materials output by pumps 26a, 26b. The electric motor 30 will continue to output rotational motion to the hydraulic fluid pump 26 and hydraulic fluid pump 26 will continue to pump hydraulic fluid. As such, the hydraulic fluid pump 26 is always operating and outputting hydraulic fluid between and during trigger pulls of the dispenser 14. Due to the release of the trigger of the dispenser 14, the pumps 26a, 26b will stop pumping between trigger pulls of the dispenser 14 due to the pressure of the hydraulic fluid fed to the driver 28 balancing with the pressure of the component fluids within the supply hoses 42 as output by the pumps 26a, 26b. When the trigger of the dispenser 14 is again actuated, the valves within the dispenser 14 will open, allowing flow of the component materials within the supply hoses 42 to resume, decreasing pressure downstream of the pumps 26a, 26b which allows the pressure of the hydraulic fluid within the driver 28 to resume movement of the sealing disk 64 and consequently pumping by the pumps 26a, 26b. The electric motor 30 can be shut off to stop outputting rotational motion and operating the hydraulic fluid pump 26 when the spray system 10 is shut down (e.g., depowered during transport or when workers leave the job site), but short of shutting down the spray system 10, hydraulic fluid pump 26 will continue to be operated by the electric motor 30 regardless of whether the dispenser 14 is outputting plural component material and regardless of whether the pumps 26a, 26b are reciprocating or idle.

[0088] The position of the valve 98 determines the pressure and the flow of hydraulic fluid to the driver 28. It is noted that a single flow of hydraulic fluid may exit the valve 98 to a divider valve 82 which divides the flow of the hydraulic fluid to the two paths for therespective driver chambers 74a, 74b of the driver 28, such that the two flows are introduced on opposite sides of the sealing disk 64. The divider valve 82 can alternate between flowing the hydraulic fluid to the left or right side of the driver 28 to make the sealing disk 64 move left or right. Limit switches 84a, 84b (which can be mechanical switches or electrical switches that operate mechanical or electric valves) can indicate when the particular stroke left or right has moved far enough to flip the divider valve 82 to alternate between suppling the left or the right side of the driver 28.

[0089] Electric actuator 100 can position the valve 98 in a plurality of positions. The plurality of positions can change the patency of the hydraulic flow. The plurality of positions can change the patency of the flow channel through the valve 98. The valve 98 is a variable valve and is not a binary valve, a binary valve allowing either closed (no flow) or open (allows flow) operation. The electric actuator 100 can operate the valve 98 to be in a plurality of different open positions, with the flow channel through the valve 98 open to a greater degree or to a lesser degree, but still patent to still allow flow, in each of the plurality of different open positions. In this way, the valve 98 can operate as a flow restrictor, regulating the amount, and pressure, of hydraulic fluid applied to the driver 28 (directly or indirectly).

[0090] If the fluid parameter output by the pump 26a, as measured by sensor 86a, varies from the target pressure set by the user, then the controller 96 can cause the electric actuator 100 to change the position of the valve 98 to thereby adjust the hydraulic flow to the driver 28 to change the pressure and / or flow rate of the component fluids output by the pumps 26a, 26b. For example, if the fluid pressure output by pump 26a, as measured by sensor 86a, is below the target pressure as set by the user via the user interface 18, then the controller 96 receiving both of these inputs can cause the electric actuator 100 to change the position of the valve 98 to increase the flow and / or pressure to be applied to the driver 28 to thereby increase the pressure and / or flow of component fluids output from the pumps 26a, 26b. If the fluid pressure output by the pump 26a, as measured by the sensor 86a, is above the pressure as set by the user via the user interface 18, then the controller 96 receiving both of these inputs can cause the electric actuator 100 to change the position of the valve 98 to decrease the flow and / or pressure to be applied to the driver 28 to thereby decrease the pressure and / or flow of component fluids output from the pumps 26a, 26b. It is understood that this can take different forms, depending on the hydraulic circuit implemented.The controller 96 can cause the electric actuator 100 to adjust the opening of the valve 98 to change the flow of hydraulic fluid to the driver 28. In some examples, the controller 96 is configured to implement changes to the patency of the valve 98 based on the operating state of the spray system 10. For example, controller 96 can be configured to cause the electric actuator 100 to adjust the valve 98 when the spray system 10 is not emitting material and the pumps 26a, 26b are not pumping. In some such examples, the electric actuator 100 does not change the patency of the valve 98 while the pumps 26a, 26b are pumping. Controller 96 can be configured to cause the patency of the valve 98 to be adjusted when the pumps 26a, 26b are stalled such that hydraulic fluid is not being actively pumped through the driver 28. Adjusting the patency of the valve 98 during stall and not during active pumping by pumps 26a, 26b prevents large pressure fluctuations that can occur when such adjustments are made during pumping operations, preventing such undesirable fluctuation.

[0091] Pressure regulator 88 can be controlled between a variety of opening positions to control flow of the hydraulic fluid to the driver 28. The pressure regulator 88 is electrically operated while the pumps 26a, 26b are hydraulically operated. The pressure regulator 88 provide electronic control for a hydraulic system. It is understood that valve 98 can be configured in any desired manner for regulating hydraulic flow to the driver 28. In some examples, further opening of valve 98 increases flow to the driver 28 to increase pressure output by pumps 26a, 26b while further closing of valve 98 decreases flow to the driver 28 to decrease pressure output by pumps 26a, 26b. In some examples, further opening of valve 98 decreases flow to the driver 28 to decrease pressure output by pumps 26a, 26b while further closing of the valve 98 increases flow to the driver 28 to increase pressure output by pumps 26a, 26b.

[0092] In some examples, the hydraulic flow regulated by pressure regulator 88 flows through valve 98 and then downstream to driver 28. In other examples, the hydraulic flow is regulated by pressure regulator 88 but does not flow through valve 98 prior to flowing to driver 28.

[0093] In some examples, the pressure regulator 88 opens further to cause increased pressure to driver 28 and the pressure regulator 88 closes further to cause decreased pressure to driver 28.

[0094] In some examples, the pressure regulator 88 opens further to cause decreased pressure to the driver 28 and the pressure regulator 88 closes further to cause increased pressure to the driver 28.In one example, if the fluid pressure output by pump 26a, as measured by sensor 86a, is below the pressure as set by the user via the user interface 18, then the controller 96 receiving both of these inputs (the sensor information and user supplied fluid parameter setting) can cause the electric actuator 100 to open the valve 98 to a greater degree to cause more flow and / or pressure downstream of the valve 98, which results in more pressure and / or flow applied to the driver 28 to increase the pressure and / or flow of component materials from the pumps 26a, 26b. If the fluid pressure output by the pump 26a, as measured by sensor 86a, is above the pressure as set by the user via the user interface 18, then the controller 96 receiving both of these inputs can cause the electric actuator 100 to close the valve 98 to a greater degree to pennit less flow and / or lower pressure downstream of the valve 98 which results in less flow and / or pressure applied to the driver 28 to decrease the pressure and / or flow of component materials out from the pumps 26a, 26b. In such an example, valve 98 being more open can divert more flow to supply line 94a while valve 98 being more closed can divert more flow to bypass line 90.

[0095] In some examples, the hydraulic fluid passing to the divider valve 82 and the driver 28 does not first pass through the valve 98 before traveling directly to the divider valve 82 and the driver 28. Instead, operation of the valve 98 diverts fluid via a side branch to the channel that goes to the divider valve 82 and the driver 28. In this configuration, the valve 98 being in a more open position diverts more flow away from the divider valve 82 and the driver 28, thereby reducing pressure output by pumps 26a, 26b, whereas the valve 98 being in a more closed position decreases the diversion and causes more flow and pressure to reach the divider valve 82 and the driver 28, thereby increasing pressure output by pumps 26a, 26b. In such an example, valve 98 being more open can divert more flow to bypass line 90 while valve 98 being more closed can divert more flow to supply line 94.

[0096] The electric actuator 100 can control the valve 98 to be in a plurality of different positions, each of which permit flow but which restrict or open a diversion channel (e.g., bypass line 90, supply line 94a) to a lesser or greater degree to regulate the flow and pressure of the hydraulic fluid acting on the driver 28.

[0097] While multiple configurations have been discussed for how the electric actuator 100 can modulate the patency of the valve 98 to control flow and pressure to the driver 28, further configurations also exist, such as by pressure regulator providing feedback to the hydraulic pump 32 to regulate the hydraulic output to driver 28. For example, valve 98 can be disposed on a branch path for the hydraulic fluid that does not go to the driver 28 (e.g., in examples including supply line 94b and the supply line 94 between valve 98 and driver28). The valve 98 can regulate flow of the hydraulic fluid through the branch path. In some examples, a back pressure of the hydraulic fluid between the valve 98 and the hydraulic pump 32 can be considered to form a hydraulic signal that regulates outflow of the hydraulic fluid from the hydraulic pump to the driver 28. For example, the valve 98 regulating flow on the branch path can change the output of the hydraulic pump 32 and / or modulate another valve which diverts the output of the hydraulic pump 32 to module the pressure / flow applied to the driver 28.

[0098] FIG. 6 is a schematic diagram showing hydraulic pathways for a spray system 10. Spray system 10 is substantively similar to spray system 10 shown in FIG. 5, but includes a pressure regulator 88 that is on a hydraulic pathway separate from the supply line 94.

[0099] Electric motor 30 is operatively connected to hydraulic pump 32 and is configured to control operation of hydraulic pump 32. Supply line 94 extends between hydraulic pump 32 and driver 28. Return line 92 extends from driver 28 to hydraulic reservoir 34 to return flows of the hydraulic fluid to hydraulic reservoir 34. Bypass line 90 extends from hydraulic pump 32 to hydraulic reservoir 34. Bypass line 90 provides a pathway for hydraulic fluid to bypass driver 28 and return to hydraulic reservoir 34. In the example shown, cooler 108 is disposed on bypass line 90 and can cool the hydraulic fluid. In the example shown, filter 114 is disposed upstream of reservoir 34 and is configured to filter contaminants from the hydraulic fluid. Branch line 112 extends from hydraulic pump 32. Branch line 112 is not fluidly connected to driver 28. Instead, branch path is fluidly connected to hydraulic reservoir 34 and flow through branch line 112 can pass to hydraulic reservoir 34 while bypassing driver 28.

[0100] The hydraulic pump 32 can include one or more pistons reciprocating within a cylinder which generates an output of high-pressure hydraulic fluid to the driver 28, which is a hydraulic cylinder. Between the output of the piston of the hydraulic pump 32 and the input of the driver 28 is a diverter valve 110, which diverter valve 110 can be integrated into the hydraulic pump 32. The diverter valve 110 is configured to divert a portion of the output of the piston of the hydraulic pump 32 back to the hydraulic reservoir 34 without directly acting on the driver 28.

[0101] Modulation of the valve 98 can alter the position of the swash plate and / or modulate the diverter valve 110 to adjust flow of the hydraulic fluid to the driver 28. For example, valve 98 can be configured to allow greater flow of hydraulic fluid through branch line 112 to change the output from the hydraulic pump 32 to the driver 28 in a first manner (e.g., one of increased flow and decreased flow). The valve 98 can be configured to allow lesserflow of the hydraulic fluid through branch line 112 to change the output from the pump 26 to the driver 28 in a second manner (e.g., the other one of increased flow and decreased flow). The second manner can be the opposite of the first manner.

[0102] The state of the diverter valve 110 is influenced by the flow and / or pressure through the pressure regulator 88. In some examples, the opening state of the valve 98 of the pressure regulator 88 sets a back pressure in the branch line 112 between hydraulic pump 32 and pressure regulator 88. The back pressure in the branch line 112 can set the opening state of the diverter valve 110, thereby setting an amount of hydraulic flow to the driver 28. For example, a greater amount of flow and / or pressure through the pressure regulator 88 diverts a greater amount of the output from the hydraulic pump 32 through the bypass line 90 and back to the hydraulic reservoir 34 such that lesser pressure of the hydraulic fluid is acting upon the driver 28. The driver 28 in turn operates the pumps 26a, 26b to put out lower pressure. Lesser amount of flow and / or pressure through the pressure regulator 88 divert a lesser amount of output from the hydraulic pump 32 through the bypass line 90 and back to the hydraulic reservoir 34 such that the pressure acting on the driver 28 is greater. The driver 28 in turn operates the pumps 26a, 26b to output higher pressure.

[0103] In such an example, if the controller 96 determines that lower pressure output is needed from the pumps 26a, 26b (e.g., based on a comparison of target pressure and sensed pressure), the controller 96 will cause the electric actuator 100 to open the valve 98 to a greater degree to have lesser pressure on the diverter valve 110 to cause greater flow back to the hydraulic reservoir 34 to have less pressure acting on the driver 28. If the controller 96 determines that higher pressure output is needed from the pumps 26a, 26b, the controller 96 will cause the electric actuator 100 to close the valve 98 to a greater degree to have greater pressure on the diverter valve 110 to cause less flow to be diverted to the hydraulic reservoir 34 and thereby have greater pressure acting on the hydraulic cylinder 62.

[0104] In some examples, the pressure regulator 88 can be configured to control an output of the hydraulic pump 32 by varying the output per stroke of the hydraulic pump 32. For example, the valve 98 can control positioning of a swash plate that sets the flow per stroke of the hydraulic pump 32. In such an examples, the electric actuator 100 can modulate the valve 98 to vary the position or angle of a swash plate that causes reciprocation of the one or more pistons of the hydraulic pump 32. Modulating the position of the swash plate can change the flow output from the hydraulic pump 32.The valve 98 can be modulated to change swash plate position or partially open or close the diverter valve 110 that diverts the effective output of the hydraulic motor 30 to change the pressure and / or flow of the hydraulic fluid to the driver 28.

[0105] In some examples, the valve 98 can be modulated to allow greater flow through the valve 98 to change a swash plate position or the position of diverter valve 110 so that the hydraulic motor 30 has less effective output in regard to flow and / or pressure of hydraulic fluid from the hydraulic pump 32 to the driver 28. In an alternate example, the valve 98 can be modulated to allow lesser flow through the valve 98 to change a swash plate position or the position of a diverter valve 110 so that the hydraulic motor 30 has less effective output in regard to flow and / or pressure, of hydraulic fluid from the hydraulic pump 32 to the driver 28.

[0106] In some examples, the valve 98 can be modulated to allow greater flow through the valve 98 to change a swash plate position or the position of a diverter valve 110 so that the hydraulic motor 30 has more effective output in regard to flow and / or pressure of hydraulic fluid from the hydraulic pump 32 to the driver 28. In an alternate example, the valve 98 can be modulated to allow lesser flow through the valve 98 to change a swash plate position or the position of a diverter valve 110 so that the hydraulic motor 30 has more effective output in regard to flow and / or pressure, of hydraulic fluid from the hydraulic pump 32 to the driver 28.

[0107] Spray rig 12 provides significant advantages. Spray rig 12 includes an electrically actuated pressure regulator 88 that controls flow of hydraulic fluid to the driver 28, thereby controlling output from the pumps 26a, 26b. The valve 98 that regulates output of the hydraulic fluid to the driver 28 is actuated by electric actuator 100. The controller 96 can provide commands to the electric actuator 100 to cause the electric actuator 100 to modulate the patency of the valve 98. Such a configuration can provide precise, reactive pressure control to set the output from the pumps 26a, 26b.

[0108] In various examples, the valve 98 that regulates the hydraulic fluid flow to the driver 28 is disposed on a branch line 112 that is fluidly separate from the supply line 94 that provides the hydraulic fluid to the driver 28. The valve 98 can regulate the hydraulic fluid to the driver 28 by directly controlling hydraulic fluid flow through a hydraulic pathway that bypasses the driver 28. The pressure regulator 88 can thereby indirectly set the flow to the driver 28 without directly dividing the flow that goes to the driver 28.

[0109] The pressure regulator 88 can, in various examples, be considered to generate a hydraulic signal that adjusts the flow to the driver 28. For example, such hydraulic signalcan be considered to be formed by back pressure generated upstream of the valve 98. In some examples, the hydraulic signal can be formed by flow through the valve 98, such as in examples in which the diverter valve 110 and / or swash plate are disposed on the branch path downstream of the valve 98.

[0110] It is understood that components that are described as connected are not necessarily in contact with each other without an intermediary component, unless it is specified that they are directly connected, in which case the two components are in contact with each other. Although not necessarily stated, any two materials that are contacting in any of the figures can be described (e.g., specifically claimed) as directly connected, and any two components described herein as being connected can be described (e.g.. specifically claimed), optionally, as directly connected.

[0111] Optional language is used herein describing what “can” or “may” be present, or what “various” embodiment may include, not what is or must necessarily be present. Therefore, if in reference to an embodiment, it is stated that an aspect “may” or “can” be present, then the option can be included, or left out, of the embodiment, particularly in a claim. Each sentence or paragraph can refer to multiple, independent aspects. A claim can be amended with a select word or phrase from a sentence or paragraph without taking the whole sentence or paragraph.

[0112] The present disclosure is made using several embodiments to highlight various inventive aspects. Modifications can be made to the embodiments presented herein without departing from the scope of the invention. It is intended that someone can mix various aspects from the presented embodiments and remain within the scope of this disclosure. For example, this disclosure contemplates that a single element disclosed in part of a sentence of a paragraph can be implemented in a different embodiment (or claimed) apart from the other aspects of the rest of the sentence and paragraph. Likewise, an aspect of part of an embodiment shown in a figure can be implemented in a different embodiment (or claimed) apart from the rest of the embodiment shown in the figure. The scope of the disclosure is not limited to the specific embodiments shown herein. Rather, this disclosure is presented in an illustrative manner to demonstrate several of many possibilities within the scope of this disclosure. The scope of the invention is not limited to the particular embodiments disclosed herein.

[0113] While the invention(s) has been described with reference to an exemplary embodiment(s), it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing fromthe scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention(s) without departing from the essential scope thereof. Therefore, it is intended that the invention(s) not be limited to the particular embodiment(s) disclosed, but that the invention(s) may include all embodiments falling within the scope of the appended claims. Any single feature, or any combination of features from one embodiment show herein, may be utilized in a different embodiment independent from the other features shown in the embodiment herein. Accordingly, the scope of the invention(s) and any claims thereto are not limited to the particular to the embodiments and / or combinations of the features shown herein, but rather can include any combination of one, two, or more features shown herein.

Claims

CLAIMS:

1. A fluid sprayer that uses a hydraulic fluid for causing displacement of at least one spray fluid, the fluid sprayer comprising:a hydraulic fluid reservoir for holding the hydraulic fluid;a hydraulic pump that receives the hydraulic fluid from the hydraulic fluid reservoir and outputs the hydraulic fluid under pressure;a pump section, the pump section comprising at least one pump for pumping the at least one spray fluid and a driver that receives the hydraulic fluid output by the hydraulic pump to operate the at least one pump to pump the at least one spray fluid;a valve that regulates flow of the hydraulic fluid between the hydraulic pump and the driver, the valve configured to be set at a plurality of different settings that respectively correspond to different levels of flow through the valve;an electric actuator that sets the valve at the plurality of different settings; a sensor that measures a fluid parameter and outputs information based on the fluid parameter; anda controller that receives the information output by the sensor and, responsive at least in part to the information, operates the electric actuator to set the valve at the plurality of different settings.

2. The fluid sprayer of claim 1, further comprising a user input configured to receive a fluid parameter setting from a user, wherein the controller is configured to receive the fluid parameter setting and operate the electric actuator to set the valve at the plurality of different settings based on the fluid parameter setting and the information received from the sensor.

3. The fluid sprayer of claim 2, wherein the controller is configured to operate the electric actuator to set the valve at the plurality of different settings to allow a first amount of flow of the hydraulic fluid when the information indicates that the fluid parameter is greater than the fluid parameter setting and a second amount of flow of the hydraulic fluid when the information indicates that the fluid parameter is less than the fluid parameter setting, the first amount of flow being less than the second amount of flow.

4. The fluid sprayer of claim 3, wherein the controller is configured operate the electric actuator to set the valve at the plurality of different settings to allow a thirdamount of flow of the hydraulic fluid, the third amount of flow being less than the second amount of flow.

5. The fluid sprayer of claim 4, wherein the controller is configured to operate the electric actuator to set the valve to permit the first amount of flow of the hydraulic fluid when the information indicates that the fluid parameter is at a first level, to pennit the second amount of flow of the hydraulic fluid when the information indicates that the fluid parameter is at a second level, and to permit the third amount of flow of the hydraulic fluid when the information indicates that the fluid parameter is at a third level, wherein the third level is greater than the first level and the second level is greater than the third level.

6. The fluid sprayer of any of claims 3-5 wherein the first amount of flow of the hydraulic fluid is greater than zero.

7. The fluid sprayer of any preceding claim, wherein the fluid parameter is pressure.

8. The fluid sprayer of any one of claims 1-7, wherein the hydraulic pump is configured to continuously output the hydraulic fluid.

9. The fluid sprayer of any one of claims 1-8, wherein the hydraulic pump outputs a constant amount of the hydraulic fluid.

10. The fluid sprayer of one of claims 1-9, wherein the hydraulic pump outputs the hydraulic fluid both when the driver is operating the at least one spray fluid pump to pump the spray fluid and when the driver is not operating the at least one spray fluid pump to pump the spray fluid.

11. The fluid sprayer of any one of claims 1-10, wherein the electric actuator includes a solenoid.

12. The fluid sprayer of any one of claims 1-11, wherein the sensor measures the fluid parameter of the spray fluid downstream of a pump of the at least one pump.

13. The fluid sprayer of any one of claims 1-12, wherein the at least one pump comprises a first pump and a second pump both of which are driven by the driver out of phase with respect to each other such that the first pump is in a suction stroke while the second pump is in a pumping stroke.

14. The fluid sprayer of claim 13, wherein the first pump is configured to output a first component material, the second pump is configured to output a second component material, and the first component material and the second component material are combined before being sprayed.

15. The fluid sprayer of claim 14, further comprising a handheld gun, wherein the first component material and the second component material are combined in the handheld gun and then sprayed from the handheld gun.

16. The fluid sprayer of any of any one of claims 14 and 15, wherein the first component material and the second component material combine to produce spray foam.

17. The fluid sprayer of any one of claims 1-16, wherein the controller modulates flow of the hydraulic fluid to the driver by the electric actuator to regulate output pressure of the at least one pump.

18. The fluid sprayer of any one of claims 1-17, wherein the driver stalls and stops operating the at least one pump in response to cessation of spraying due to increase in pressure downstream of the at least one pump.

19. The fluid sprayer of any one of claims 1-18, wherein the valve is fluidly situated between the hydraulic pump and the driver such that the valve is downstream from the hydraulic pump and upstream of the driver.

20. The fluid sprayer of any one of claims 1-18, wherein the valve is disposed on a branch path downstream of the hydraulic pump and the driver is not fluidly connected to the branch path.

21. The fluid sprayer of any one of claims 1-18, wherein the hydraulic pump outputs a first hydraulic flow to the driver and the hydraulic pump outputs a second hydraulic flow to the valve, the second hydraulic flow separate from the first hydraulic flow.

22. The fluid sprayer of claim 1, wherein the valve is configured to open further to decrease pressure of the hydraulic fluid to the driver.

23. The fluid sprayer of claim 1, wherein the valve is configured to open further to increase pressure of the hydraulic fluid to the driver.

24. The fluid sprayer of any one of claims 1-23, wherein the controller is configured to operate the electric actuator to set the valve at the plurality of different settings only when the at least one pump is not pumping.

25. The fluid sprayer of any one of claims 1-23, wherein the controller does not operate the electric actuator to set the valve at the plurality of different settings when the at least one pump is pumping.

26. The fluid sprayer of any one of claims 1-25, further comprising an electric motor that operates the hydraulic pump, wherein the electric motor continuously operateswhile the fluid sprayer is in an on state regardless of whether the fluid sprayer is being operated to spray or not spray.

27. The fluid sprayer of any one of claims 1-26, wherein the electric actuator is controlled by application of different voltage levels to correspond with different degrees of patency of the valve.

28. The fluid sprayer of any one of claims 1-27, wherein the electric actuator does not fully close the valve at any of the plurality of different settings.

29. A fluid sprayer that uses a hydraulic fluid for causing displacement of at least one spray fluid, the fluid sprayer comprising:a hydraulic fluid reservoir for holding the hydraulic fluid;a hydraulic pump that receives the hydraulic fluid from the hydraulic fluid reservoir and outputs the hydraulic fluid under pressure;a pump section, the pump section comprising at least one pump for pumping the at least one spray fluid and a driver that receives the hydraulic fluid output by the hydraulic pump to operate the at least one pump to pump the at least one spray fluid;a valve that regulates flow of the hydraulic fluid between the hydraulic pump and the driver, the valve configured to be set at a plurality of different settings that respectively correspond to different levels of flow through the valve;an electric actuator that sets the valve at the plurality of different settings; a sensor that measures a fluid parameter and outputs information based on the fluid parameter; anda controller that receives the information output by the sensor and, responsive at least in part to the information, operates the electric actuator to set the valve at the plurality of different settings; wherein the valve is disposed upstream of the driver and is configured to divide the hydraulic fluid received from the pump into a first portion and a second portion, the first portion directed to the driver and the second portion directed to the hydraulic reservoir while bypassing the driver.

30. The fluid sprayer of claim 29, wherein the controller is configured to cause the valve to open further to decrease pressure of the hydraulic fluid to the driver.

31. The fluid sprayer of claim 29, wherein the controller is configured to cause the valve to open further to increase pressure of the hydraulic fluid to the driver.

32. The fluid sprayer of claim 29, wherein the controller is configured to cause the valve to open further to increase pressure of the hydraulic fluid to the driver.

33. The fluid sprayer of claim 29, wherein the controller is configured to cause the valve to open further to decrease pressure of the hydraulic fluid to the driver.

34. The fluid sprayer of any one of claims 29-33, wherein the information output by the sensor is pressure information.

35. The fluid sprayer of any one of claims 29-34, wherein the controller is configured to receive a target parameter setting from a user interface, and the controller is configured to operate the electric actuator to set the valve at the plurality of different settings based at least in part on the target parameter setting.

36. The fluid sprayer of claim 35, wherein the target parameter setting is a target pressure setting.

37. The fluid sprayer of any one of claims 29-36, wherein the at least one pump includes a first pump and a second pump.

38. The fluid sprayer of claim 37, further comprising a divider valve disposed upstream of the driver, the divider valve routing the hydraulic fluid to the driver to cause pumping by the first pump and the second pump.

39. A fluid sprayer that uses a hydraulic fluid for causing displacement of at least one spray fluid, the fluid sprayer comprising:a hydraulic fluid reservoir for holding the hydraulic fluid;a hydraulic pump that receives the hydraulic fluid from the hydraulic fluid reservoir and outputs the hydraulic fluid under pressure;a pump section, the pump section comprising at least one pump for pumping the at least one spray fluid and a driver that receives the hydraulic fluid output by the hydraulic pump to operate the at least one pump to pump the at least one spray fluid;a valve that regulates flow of the hydraulic fluid between the hydraulic pump and the driver, the valve configured to be set at a plurality of different settings that respectively correspond to different levels of flow through the valve;an electric actuator that sets the valve at the plurality of different settings;a sensor that measures a fluid parameter and outputs information based on the fluid parameter; anda controller that receives the information output by the sensor and, responsive at least in part to the information, operates the electric actuator to set the valve at the plurality of different settings; wherein the valve is disposed on a branch line that bypasses the driver such that the hydraulic fluid flowing through the valve bypasses the driver.

40. The fluid sprayer of claim 39, wherein a back pressure of the hydraulic fluid between the valve and the hydraulic pump sets a hydraulic flow from the hydraulic pump to the driver.

41. The fluid sprayer of any one of claims 39 and 40, wherein the controller is configured to cause the valve to open further to reduce pressure of the hydraulic fluid to the driver.

42. The fluid sprayer of any one of claims 39-41, wherein the controller is configured to cause the valve to close further to increase pressure of the hydraulic fluid to the driver.

43. The fluid sprayer of any one of claims 39-12, wherein the electric actuator includes a solenoid.

44. The fluid sprayer of any one of claims 39-13, wherein the valve is a needle valve.

45. The fluid sprayer of any one of claims 39-44, wherein:the at least one pump includes a first pump and a second pump;a divider valve is configured to route the hydraulic fluid to the driver to cause pumping by the first pump and the second pump; and the valve is disposed on a different hydraulic pathway from the divider valve.

46. The fluid sprayer of any one of claims 39-44, wherein:the at least one pump includes a first pump and a second pump;a divider valve is configured to route the hydraulic fluid to the driver to cause pumping by the first pump and the second pump; and the hydraulic fluid flowed through the valve bypasses the divider valve.

47. The fluid sprayer of any one of claims 39-46, wherein an output from the valve is routed to the hydraulic reservoir.

48. The fluid sprayer of any one of claims 39-47, wherein the controller is configured to receive a target parameter setting from a user interface, and the controller is configured to operate the electric actuator to set the valve at the plurality of different settings based at least in part on the target parameter setting.

49. The fluid sprayer of claim 48, wherein the target parameter setting is a target pressure setting.

50. A fluid sprayer for spraying a plural component material formed by a combination of a first component fluid and a second component fluid, the fluid sprayer comprising:a first pump that pumps the first component fluid, the first pump comprising a first cylinder and a first piston that reciprocates within the first cylinder;a second pump that pumps the second component fluid, the second pump comprising a second cylinder and a second piston that reciprocates within the second cylinder;a first heater through which the first component fluid flows upstream of the first pump;a second heater through which the second component fluid flows upstream of the second pump; anda frame that supports each of the first pump, the second pump, the first heater, and the second heater,wherein, relative to the frame, the first heater and the second heater are laterally inward of both of the first cylinder and the second cylinder.

51. The fluid sprayer of claim 50, wherein the first heater and the second heater do not overlap laterally with either of the first cylinder and the second cylinder.

52. The fluid sprayer of any one of claims 50 and 51, wherein:the first heater includes a first internal flow channel through which the first component fluid flows while being heated, the first internal flow channel is parallel with a first axis,the second heater includes a second internal flow channel through which the second component fluid flows while being heated,the first piston reciprocates parallel with a second axis;the second piston reciprocates parallel with the second axis; andthe first axis is not parallel with the second axis.

53. The fluid sprayer claim 52, wherein the first axis is vertically orientated.

54. The fluid sprayer of any one of claims 52 and 53, wherein the second axis is horizontally orientated.

55. The fluid sprayer of any one of claims 52-54, wherein the first heater and the second heater are located below each of the first pump and the second pump.

56. The fluid sprayer of any one of claims 52-55, wherein the first heater and the second heater are located rearward of the first pump and the second pump.

57. The fluid sprayer of any one of claims 52-56, further comprising a driver that receives hydraulic fluid to operate both of the first pump and the second pump.

58. The fluid sprayer claim 57, wherein the driver is located directly between the first pump and the second pump.

59. The fluid sprayer of claim 58, wherein the driver is located laterally between the first cylinder and the second cylinder.

60. The fluid sprayer of any one of claims 57-59, further comprising a hydraulic pump that pumps the hydraulic fluid to the driver.

61. The fluid sprayer of claim 60, further comprising an electric motor that drives the hydraulic pump.

62. The fluid sprayer of claim 61, wherein the electric motor is disposed vertically above the hydraulic pump.

63. The fluid sprayer of any one of claims 61 and 62, wherein a rotational axis of the electric motor is disposed vertically.

64. The fluid sprayer any one of claims 60-63, wherein the hydraulic pump is located rearward of the driver.

65. The fluid sprayer of any one of claims 60-64, wherein the hydraulic pump is located below the driver.

66. The fluid sprayer of any one of claims 52-65, wherein the first component fluid and the second component fluid are combined before being sprayed.

67. The fluid sprayer of any one of claims 52-66, further comprising a handheld gun, wherein the first component fluid and the second component fluid are sprayed as the plural component material from the handheld gun.

68. The fluid sprayer of any one of claims 52-67, wherein the first component fluid and the second component fluid are combined to produce spray foam, such that the plural component material is formed by the spray foam.

69. A fluid sprayer for spraying a plural component material formed by a combination of a first component fluid and a second component fluid, the fluid sprayer comprising:a first pump that pumps the first component fluid, the first pump comprising a first cylinder and a first piston that reciprocates within the first cylinder;a second pump that pumps the second component fluid, the second pump comprising a second cylinder and a second piston that reciprocates within the second cylinder;a first heater through which the first component fluid flows upstream of the first pump;a second heater through which the second component fluid flows upstream of the second pump; anda frame that supports each of the first pump, the second pump, the first heater, and the second heater,wherein the first heater and the second heater are disposed within a footprint of the frame.

70. The fluid sprayer of claim 69, wherein the first heater and the second heater are disposed laterally between a first lateral side of the frame and a second lateral side of the frame.

71. The fluid sprayer of any one of claims 69 and 70, wherein the first heater and the second heater are disposed laterally inward of a midpoint of the first cylinder and a midpoint of the second cylinder.

72. The fluid sprayer of any one of claims 69-71, wherein the first heater and the second heater are disposed laterally between at least one check valve of the first pump and at least one check valve of the second pump.

73. The fluid sprayer of any one of claims 69-72, wherein the first heater and the second heater are disposed laterally between a first piston head of the first piston and a second piston head of the second piston.

74. The fluid sprayer of any one of claims 69-7 , wherein the first pump and the second pump extend outward beyond the footprint of the frame.

75. The fluid sprayer of any one of claims 69-74, wherein the first heater includes at least one flow passage, the at least one flow passage parallel to a heater axis,wherein the first piston is configured to reciprocate along a first pump axis, and wherein the first pump axis is disposed transverse to the heater axis.

76. The fluid sprayer of claim 75, wherein the first heater includes a plurality of the passages.

77. The fluid sprayer of claim 76, wherein the first spray fluid flows serially through the plurality of passages.

78. The fluid sprayer of any one of claims 75-77, wherein the second piston is configured to reciprocate on a second pump axis, the second pump axis disposed coaxially with the first pump axis.

79. The fluid sprayer of any one of claims 69-78, further comprising:a driver connected to the first piston and the second piston; and a hydraulic pump configured to pump hydraulic fluid to the driver to cause the driver to reciprocate the first piston and the second piston.

80. The fluid sprayer of claim 79, wherein the hydraulic pump is disposed rearward of the first pump and the second pump and the hydraulic pump is disposed forward of the first heater and the second heater.

81. The fluid sprayer of any one of claims 79 and 80, wherein a hydraulic reservoir that stores a supply of the hydraulic fluid is disposed rearward of the first pump and the second pump and disposed forward of the first heater and the second heater.

82. The fluid sprayer of any one of claims 79-81, further comprising:an electric motor connected to the hydraulic pump to power pumping by the hydraulic pump.

83. The fluid sprayer of claim 82, wherein the electric motor extends vertically above the hydraulic pump.

84. The fluid sprayer of any one of claims 82 and 83, wherein the electric motor is disposed fully vertically above the hydraulic pump.

85. The fluid sprayer of any one of claims 82-84, wherein a rotational axis of the electric motor is oriented vertically.

86. The fluid sprayer of any one of claims 83-85, wherein the electric motor is disposed rearward of the first pump and the second pump, and the electric motor is disposed forward of the first heater and the second heater.

87. The fluid sprayer of any one of claims 75-86, wherein the frame includes a base and a vertical support, and wherein the base defines the footprint.

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