Spraying rod

Abstract

A spray wand is disclosed. The spray rod comprises a spray body provided with a nozzle, a charging barrel assembly arranged in the spray body and provided with a replaceable charging barrel, and a flow control valve used for controlling fluid flow passing through the spray rod. The movable member of the nozzle has an inwardly narrowed orifice from which the fluid flow exits the spray wand in a particular mode of operation. A cartridge of the cartridge assembly has an array of apertures to allow solid chemical particles of a desired size to flow out of the cartridge assembly. The flow control valve includes a piston, a sealing element disposed on the piston, and a biasing element for exerting a biasing force on the piston. In some embodiments, the sealing element is overmolded on the piston to prevent deformation and leakage.

Description

[0001] Cross-reference of related applications

[0002] This application claims the benefit of U.S. Provisional Patent Application Serial No. 63 / 685,351, filed August 21, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to a spray stick, and more specifically, to a spray stick for use with chemicals or chemical formulations in solid form. Background Technology

[0004] Outdoor cleaning requires the application of large quantities of cleaning agents to large surfaces such as siding, roofing, decks, patios, and vehicles. The industry-standard solution for this type of cleaning is a liquid-based hose-and-drip product. These products typically contain a bottom reservoir that holds a concentrated liquid chemical solution. The final cleaning solution is formed when the hose is connected to the nozzle of the device and water flows through the hose. The liquid concentrate is drawn into the dip tube and mixed with the water flowing through the nozzle of the device. The diluted chemical solution is then dispensed onto the surface to be cleaned.

[0005] Some problems with standard hose-end devices are that they are often very bulky and cumbersome, and not ergonomically designed for use. The location where the hose connects to the device significantly restricts the range of motion during cleaning, and the added weight of the liquid concentrate often requires the user to operate the device with both hands. Furthermore, flow restrictors are typically used to ensure the correct dilution ratio is achieved. Using these flow restrictors greatly reduces the overall spray distance of the dilution spray.

[0006] Therefore, there is a need for a lighter, hose-end product designed to optimize the ergonomic outdoor cleaning experience.

[0007] Accordingly, there is a desire to develop a spray stick that provides an improved ergonomic outdoor cleaning experience while optimizing the performance, effectiveness, and efficiency of the spray stick. Summary of the Invention

[0008] Consistent with and in accordance with this disclosure, an unexpected spray stick has been discovered that offers optimal performance, effectiveness, and efficiency while providing an improved ergonomic outdoor cleaning experience.

[0009] The spray stick disclosed herein addresses the aforementioned problems by providing a device that is ergonomically superior to existing hose-end products on the market and can be easily held with one hand during operation. The spray stick of this disclosure can continuously dilute concentrated solid chemicals to deliver a clean solution containing pesticide active ingredients that kill microorganisms and is registered with the U.S. Environmental Protection Agency (EPA).

[0010] The spray stick disclosed herein can be used to achieve the appropriate dilution of solid chemicals to produce an optimal cleaning solution. Ensuring continuous and accurate dilution of solid chemicals with water is important not only for the product's lifespan when cleaning large outdoor surfaces, but even more so for ensuring the correct dosage of the pesticide active ingredient (i.e., calcium hypochlorite) in killing microorganisms such as mold. Products delivering pesticide active ingredients must pass Good Laboratory Practice (GLP) testing and obtain EPA registration. Such GLP testing requires defining a specific range of pesticide active ingredient concentrations and testing for the killing of target microorganisms to ensure the effectiveness of the final cleaning solution. The equipment delivering the final cleaning solution needs to continuously provide the appropriate dilution ratio of the pesticide active ingredient to ensure it is identical to the chemical tested in the GLP test, in order to comply with EPA regulations.

[0011] The spray bar disclosed herein also allows water to flow over solid chemicals and through its spray selector in a manner that enables the output stream to have a greater spray distance than existing hose-end products on the market.

[0012] The spray wand disclosed herein allows for a hose connection method that ensures the hose does not obstruct the range of motion during cleaning, and the device is lightweight enough to be easily held with just one hand during operation. To achieve this lighter weight, the device operates using a solid composition of chemicals. This allows for a smaller overall weight in the device because the solid composition of chemicals is more concentrated than its liquid counterpart.

[0013] In one embodiment, a spray bar includes: a spray body with a nozzle; a valve assembly coupled to the spray body; and a cartridge assembly disposed in the spray body, the cartridge assembly including a cartridge comprising: a tubular member having a proximal end and a distal end; and a plurality of pores formed in the distal end of the tubular member, wherein the pores are arranged in an opposing radial array.

[0014] As part of some embodiments, at least one of the pores has a diameter of about 0.050 inches to about 0.150 inches.

[0015] As part of some embodiments, the barrel includes eight orifices.

[0016] In another embodiment, a spray bar includes: a spray body with a nozzle; a cartridge assembly disposed within the spray body; and a valve assembly coupled to the spray body, the valve assembly including: a housing having a chamfered end and a hose nut; a first sealing element disposed within the hose nut, wherein the first sealing element is configured to seal against the chamfered end of the housing; a flow control valve disposed within the housing; and a piston disposed within the housing, the piston having a second sealing element, wherein the piston is selectively positionable between a first position to prevent fluid from flowing through the valve assembly and a second position to allow fluid to flow through the valve assembly.

[0017] As part of some embodiments, the first sealing element includes a body having an annular hub portion.

[0018] As part of some embodiments, the annular hub portion includes a generally planar contact area configured to engage with a chamfered end of the housing to form a generally fluid-tight seal between them.

[0019] As part of some embodiments, the piston includes one or more protrusions forming a fluid passage at one end thereon.

[0020] As part of some embodiments, the piston includes an annular flange having a seat surface for a sealing element.

[0021] As part of some embodiments, the piston includes an annular hub having a seat surface for a second sealing element.

[0022] As part of some embodiments, the second sealing element is an O-ring.

[0023] As part of some embodiments, the second sealing element is an overmolded sealing element.

[0024] As part of some embodiments, the second sealing element is made of at least one of the following materials: ethylene propylene diene monomer (EPDM) rubber, nitrile rubber, and / or fluororubber.

[0025] As part of some embodiments, the second sealing element has a compression set of approximately 25%.

[0026] As an aspect of some embodiments, the spray bar also includes a biasing element for applying a biasing force on the piston, wherein the biasing force is from about 2.5 psi to about 6.5 psi.

[0027] As part of some embodiments, the biasing element pushes the piston into a first position.

[0028] In another embodiment, a spray bar includes: a spray body with a nozzle, the nozzle including: a movable member; and an orifice formed in the movable member, the orifice having an inlet opening and an outlet opening, wherein the orifice includes an inner surface inclined inward toward the orifice centerline; a valve assembly coupled to the spray body; and a cartridge assembly disposed in the spray body.

[0029] As part of some embodiments, the inner diameter of the orifice gradually decreases from the inlet opening to the outlet opening.

[0030] As part of some embodiments, the orifice has an inner diameter of approximately 0.170 inches at the inlet opening and an inner diameter of approximately 0.110 inches at the outlet opening.

[0031] As part of some embodiments, the inner surface of the orifice is tilted at an angle of about 0 degrees to about 45 degrees relative to the centerline.

[0032] As part of some embodiments, the inner surface of the orifice is inclined at an angle of approximately 6.5 degrees relative to the centerline. Attached Figure Description

[0033] The foregoing and other features and objects of this disclosure, as well as the ways in which they are obtained, will be more readily understood by referring to the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

[0034] Figure 1 This is a perspective view of a spray bar according to an embodiment of the present disclosure; Figure 2 yes Figure 1 Side view of the spray bar; Figure 3 yes Figure 1 and 2 A cross-sectional view of the spray bar; Figure 4 yes Figure 1-3 A magnified partial cross-sectional view of the spray bar; Figure 5 According to embodiments of this disclosure Figure 1-4 Front view of the nozzle of the spray bar shown; Figure 6 According to embodiments of this disclosure Figure 1-4 A perspective view of the spray bar's barrel assembly; Figure 7 yes Figure 6 A magnified partial 3D view of the closed end of the barrel assembly shown; Figure 8 According to embodiments of this disclosure Figure 1-4 A three-dimensional view of the flow components of the spray bar shown; Figure 9 yes Figure 1-3 An enlarged partial cross-sectional view of a portion of the spray bar shown, including... Figure 9 The valve assembly, wherein the valve assembly is in the closed "OFF" state; Figure 10 According to embodiments of this disclosure Figure 1-3An enlarged partial cross-sectional view of a portion of the spray bar shown, including the valve assembly, wherein the valve assembly is in the "ON" open state; Figure 11 According to embodiments of this disclosure, it is used for Figure 9 and 10 An enlarged rear view of the sealing element of the valve assembly hose nut; Figure 12 yes Figure 11 A magnified rear-view stereoscopic view of the sealing element; Figure 13 yes Figure 11 and 12 A view of the sealing element; Figure 14 yes Figure 11-13 A cross-sectional view of the sealing element; Figure 15 This is an enlarged partial perspective sectional view of a portion of a valve assembly according to another embodiment of the present disclosure; Figure 16 yes Figure 15 An enlarged partial cross-sectional view of the valve assembly, wherein the valve assembly is in the "ON" open state; Figure 17 yes Figure 15 and 16 A three-dimensional view of the piston of the valve assembly; Figure 18 This is an exploded view of a spray bar according to an embodiment of the present disclosure, wherein the spray bar includes a valve assembly with a piston having an overmolded sealing element; Figure 19 yes Figure 18 A magnified partial perspective sectional view of a portion of the spray bar, showing the valve assembly in the "ON" open position; Figure 20 yes Figure 18 and 19 A front-view perspective view of a piston with a sealed, encapsulated component; Figure 21 yes Figure 18-20 Exploded front perspective view of a piston with a molded sealing element; Figure 22 yes Figure 18-21 Exploded rear-view perspective of the piston and the overmolded sealing element; Figure 23 yes Figure 18-22 Front view of the piston and the overmolded sealing element; Figure 24 yes Figure 18-23 Rear view of the piston and the overmolded sealing element; Figure 25 This is a front perspective view of a piston with an overmolded sealing element for a flow control valve according to another embodiment of the present disclosure; and Figure 26 yes Figure 25 Side view of the piston. Detailed Implementation

[0035] The following technical description is merely an exemplary illustration of the nature, manufacture, and one or more uses of the subject matter and is not intended to limit the scope, application, or use of any specific disclosure claimed in this application or any other application that may be filed claiming priority to this application or in any patent granted thereby. Regarding the disclosed methods, the presented order of steps is exemplary, and therefore the order of steps may differ in different embodiments. The terms “a” and “an” as used herein mean the presence of “at least one” item; where possible, multiple such items may be present. Unless otherwise expressly stated, all numerical quantities in this description should be understood to be modified by the word “about,” and all geometric and spatial descriptors should be understood to be modified by the word “substantially” when describing the broadest range of techniques. When applied to numerical values, “about” means that the calculation or measurement allows for a slight imprecision of the value (the value is somewhat close to exact; approximately or reasonably close to the value; nearly). If, for some reason, the imprecision provided by “about” and / or “substantially” is not understood in this ordinary sense in the art, then “about” and / or “substantially” as used herein means at least a variation that may be caused by common methods of measuring or using such parameters.

[0036] Unless otherwise expressly stated, all documents referenced in this detailed description, including patents, patent applications, and scientific literature, are incorporated herein by reference. In the event of any conflict or ambiguity between the incorporated references and this detailed description, this detailed description shall prevail.

[0037] Although the open-ended term "comprising" (as a synonym for non-limiting terms such as including, containing, or having) is used herein to describe and claim embodiments of the present technology, embodiments may also be described using more restrictive terms such as "composed of" or "substantially composed of". Therefore, for any given embodiment listing materials, components, or process steps, the present technology also specifically includes embodiments composed of (excluding additional materials, components, or processes) or substantially composed of (excluding additional materials, components, or processes that affect significant characteristics of the embodiment), even if such additional materials, components, or processes are not expressly listed in this application. For example, listing compositions or processes containing elements A, B, and C specifically contemplates embodiments composed of A, B, and C, as well as embodiments substantially composed of A, B, and C, excluding element D, which may be listed in the prior art, even if element D is not expressly described herein as excluded.

[0038] As stated herein, unless otherwise specified, all composition percentages are weight percentages of the total composition. Disclosure of ranges, unless otherwise specified, includes endpoints and encompasses all distinct values ​​throughout the range and further subdivisions. Thus, a range such as “from A to B” or “from about A to about B” includes both A and B. Disclosure of values ​​and ranges for a particular parameter (such as amount, weight percentage, etc.) does not exclude other values ​​and ranges useful herein. It is contemplated that two or more specific exemplary values ​​of a given parameter may define the endpoints of the range of values ​​for which that parameter can be claimed. For example, if parameter X is exemplary herein to have a value A and is also exemplary to have a value Z, then parameter X is contemplated to have a range of values ​​from about A to about Z. Similarly, disclosure of two or more ranges of values ​​for a parameter (whether nested, overlapping, or distinct) encompasses all possible combinations of values ​​that may be claimed using the endpoints of the disclosed range. For example, if parameter X is exemplified in this document as having a value in the range of 1-10, or 2-9, or 3-8, then it is also conceivable that parameter X could have other value ranges, including 1-9, 1-8, 1-3, 1-2, 2-10, 2-8, 2-3, 3-10, 3-9, and so on.

[0039] When an element or layer is referred to as “on,” “joined to,” “connected to,” or “coupled to” another element or layer, it may be directly on, joined to, connected to, or coupled to that other element or layer, or there may be intermediate elements or layers. Conversely, when an element is referred to as “directly on,” “directly joined to,” “directly connected to,” or “directly coupled to” another element or layer, there are no intermediate elements or layers. Other terms used to describe relationships between elements should be interpreted similarly (e.g., “between” vs. “directly between,” “adjacent” vs. “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0040] Although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or portion from another region, layer, or portion. Unless the context clearly indicates otherwise, numerical terms such as “first”, “second,” etc., used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or portion discussed below may be referred to as a second element, component, region, layer, or portion without departing from the teachings of the exemplary embodiments.

[0041] Spatial relative terms, such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein for ease of description to describe the relationship of one element or feature to another element or feature shown in the accompanying drawings. Spatial relative terms are intended to cover different orientations of the device in use or operation other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “below” other elements or features will subsequently be oriented “above” other elements or features. Thus, the exemplary term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0042] Figure 1-3 A spray stick 2 according to an embodiment of the present disclosure is shown. Details of exemplary structures and various functions of the spray stick 2 are disclosed in U.S. Patent Publications 2023 / 0166278 and 2025 / 0222493, and U.S. Patents 11,679,404; 11,833,553; 12,103,025; and 12,263,508, which are incorporated herein by reference. The spray stick 2 is versatile in its range of motion and lighter in weight. Because the spray stick 2 can be operated with one hand and a hose can be directly connected to it, the spray stick 2 can be easily used for a variety of spraying applications. For example, the spray stick 2 can be used to clean various areas, including around, above, below, or other hard-to-reach places. The spray stick 2 can be used with one hand, making it easier for the user to raise their arm to achieve a greater reach, unlike products that require two hands. Furthermore, the spray stick 2 of this disclosure generates higher fluid pressure, thus resulting in a longer spray range, making it ideal for outdoor hard surfaces.

[0043] In some embodiments, the spray bar 2 includes a non-disposable hollow spray body 12 with a nozzle 10, a replaceable cartridge assembly 14 removably disposed inside the spray body 12, and a valve assembly 13 releasably coupled to one end of the spray body 12 opposite to the nozzle 10. The flow of fluid (e.g., water) (also referred to herein as the “source fluid”) from a fluid source and / or conduit (e.g., a hose) through the spray bar 2 can be selectively controlled by the valve assembly 13. Figure 1-3 The spray bar 2 depicted includes an angled spray bar end 15 with a nozzle 10 and an opposing closed end or source end 16. In some embodiments, one or more grip features 24 may be located on the spray body 12 of the spray bar 2. By positioning the grip features 24 on the spray body 12, rather than closer to the source end 16 of the spray bar 2 and / or on the valve assembly 13, the torque on the user's arm can be minimized, thereby reducing user fatigue.

[0044] As shown in the figure, the nozzle 10 includes a selectively positionable movable member 11. Member 11 includes a flow orifice 17 and one or more spray orifices 19. Figure 5 As shown, nozzle 10 has at least three selectable settings: "JET" (jet), horizontal "FAN" (fan), or vertical "FAN". The "JET" setting uses flow orifice 17, while each of the "FAN" settings uses one spray orifice 19. Figure 4 As can be best seen, the flow orifice 17 has an inner surface 21 that slopes inward toward its centerline, extending from the inlet opening 23 near the spray body 12 to its outlet opening 25. This gradual decrease in the inner diameter of the flow orifice 17 from the inlet opening 23 to the outlet opening 25 increases the velocity of the fluid flowing through it, resulting in a greater spray distance. Preferably, the inner surface 21 slopes inward with respect to the centerline of the flow orifice 17 at an angle ranging from about 0 degrees to about 45 degrees, more preferably at an angle of about 6.5 degrees with respect to the centerline of the flow orifice 17. Thus, the inner diameter of the flow orifice 17 decreases from about 0.170 inches at the inlet opening 23 to about 0.110 inches at the outlet opening 25. It should be understood that the slope angle of the inner surface 21 and the inner diameter of the flow orifice 17 are crucial for the spray bar 2 to achieve the desired spray distance without atomization.

[0045] In some embodiments, the nozzle 10 is rotatable to allow selection of one of the settings. Specifically, the member 11 can rotate in a first clockwise direction and an opposite second counterclockwise direction. The member 11 may include one or more stops (not shown) to provide tactile feedback to the user and maintain the position of the nozzle 10. The stops of the nozzle 10 engage and cooperate with one or more detent pockets (not shown) of the spray body 12 to hold the nozzle 10 in the desired rotational position during use. Figure 4 As shown more clearly, the sealing element 56 can be disposed in the recess 58 of the spray body 12 to prevent leakage between the nozzle 10 and the spray body 12. It should be understood that any suitable type of sealing element 56 can be used, such as an O-ring.

[0046] As shown, the spray body 12 can typically be tubular and configured to receive the cartridge assembly 14 therein. In some embodiments, the spray body 12 comprises a hollow tube, preferably a transparent tube, having an angled rod-shaped spray end 26 attached to the nozzle 10 and an opposing open end 29. Figure 1-3As shown, the cartridge assembly 14 may include a cartridge 40 and a flow member 42. The cartridge 40 contains a chemical or chemical formulation in solid form, also referred to herein as a solid chemical. This solid chemical is preferably used for various purposes, such as cleaning, mold removal, or mildew control. Examples of solid chemical forms include, but are not limited to, granules, tablets, or some other form of solid chemical. Among various other benefits, this solid chemical has a longer shelf life relative to other known chemicals, reduces the mass of the spray stick 2 during use, eliminates liquid weight that increases transportation costs, and improves visual monitoring of chemical consumption. The spray stick 2 of this disclosure preferably contains a chemical or chemical formulation in solid form, such as a solid chlorine bleach. Non-limiting examples of chemicals or chemical formulations include, but are not limited to, detergent soda, baking soda, solid surfactants, calcium hypochlorite, sodium hypochlorite, citric acid, sodium sulfate, urea, quaternary ammonium compounds, herbicides, insecticides, pesticides, fertilizers, and combinations thereof. Preferably, the chemical and / or chemical formulation includes calcium hypochlorite. Calcium hypochlorite contains more than 70% effective active chlorine and has a long shelf life when stored properly.

[0047] In some embodiments, the barrel 40 may include a generally tubular member having an open proximal end and a generally closed distal end. One or more orifices 43 may be formed in the distal end of the tubular member. Figure 6 and 7 As shown more clearly, the pores 43 can be arranged in an opposing radial array. However, it should be understood that the pores 43 can be formed in the barrel 40 in various other arrangements, such as a complete circular array. The pores 43 shown are generally circular with a diameter of about 0.050 inches to about 0.150 inches, more preferably about 0.100 inches. However, it should be understood that the shape, size, and configuration of the pores 43 can be any shape, size, and configuration specifically designed to control the amount of solid chemicals allowed to mix with the fluid flow and / or the particle size of solid chemicals allowed to exit the barrel 40. By controlling the amount and / or size of the solid chemicals, the barrel 40 is able to prevent the flow of fluid through the spray bar 2, particularly through the nozzle 10, causing blockage.

[0048] In some embodiments, the flow member 42 may be releasably coupled to or otherwise attached to or secured to the cartridge 40. For example, when the cartridge assembly 14 is designed to be refillable, the flow member 42 may be releasably coupled to the cartridge 40. In another example, when the cartridge assembly 14 is designed to be disposable and / or replaceable, the flow member 42 may be securely attached to the cartridge 40. In some embodiments, the flow member 42 may be inserted into the proximal end of the cartridge 40 until the flow member 40 contacts and / or abuts against the shoulder of the cartridge 40. Coupling elements (e.g., teeth or tabs) extending as part of the flow member 42 may provide snap-fit ​​features to engage with the cartridge 40, preventing accidental removal while allowing contact coupling when needed. It is also contemplated that the flow member 42 may be attached to the cartridge 40 using a variety of other methods, such as threaded connections, chemical bonding, or welding. The flow member 42 is configured to generate turbulence and / or swirling effects in the flow of fluid within the spray body 12, and / or to guide the flow of fluid through the solid chemicals within the cartridge 40 so that the solid chemicals are not diluted too quickly and reach the chemical concentration required for effectiveness.

[0049] Figure 8 An exemplary embodiment of the flow member 42 is illustrated, including a front side 44 and a rear side 46, which generate fluid tumbling within the barrel 40. Without fluid rotation and tumbling, the fluid flows directly through the barrel 40, resulting in a lower chemical concentration. The fluid flows linearly into the rear side 46 of the flow member 42. The flow member 42 causes a change of direction, and the fluid flows out tangentially. The configuration of the flow member 42 may include one or more tangential channels 48, preferably two or more tangential channels 48. The channels 48 can be of various geometries, such as rectangular or spiral. The spacing between the channels 48 can result in greater tangential forces; however, this may or may not result in higher concentrations of solid chemicals. The flow member 42 has one or more raised protrusions 50 with fluid outlet windows 52, which can be rectangular, square, circular, or other shapes. A rectangle is shown in the figure. The flow member 42 can have various configurations. Considerations for selecting a configuration include, but are not limited to, suitability for the injection molding process and the cross-sectional area that does not restrict fluid flow. The flow member 42 may have alternative configurations and remain within the scope of this disclosure, as long as such configuration generates vortices or eddies as the fluid flows through the flow member 42. For example, the fluid flows into the flow member 42 as a single stream, and the configuration of the flow member 42 generates multiple streams in one direction to create vortices or swirling effects in the fluid flow. Alternative configurations of the flow member 42 may be available within the scope of this disclosure.

[0050] Due to the geometry of the spray bar 2 and / or the cartridge assembly 14, particularly the flow member 42, the fluid flows directly over the solid chemicals and out of the spray bar 2. In some cases, the fluid flows over the cartridge assembly 14 in a tumbling or tangential vortex manner over the solid chemicals, maximizing the contact between the fluid and the solid chemicals, thereby producing a higher concentration of applied chemicals in the chemical fluid mixture.

[0051] It should be understood that the spray nozzle 12, the cartridge assembly 14, and / or the cartridge 40 may be relatively transparent or translucent to allow monitoring of the levels of the cartridge assembly 14, the cartridge 40, and / or the solid chemicals. The spray nozzle 12 and / or the cartridge 40 may also include indicators / markers (not shown) to alert the user when the solid chemicals reach a level requiring refilling and / or when the cartridge 40 needs to be replaced to achieve the desired concentration level.

[0052] In some embodiments, the barrel assembly 14 may be releasably coupled to the valve assembly 13. As a non-limiting example, such as Figure 9 and 10 As shown, the flow member 42 may include an external thread 30 configured to threadably engage with the internal thread 32 of the valve assembly 13 of the spray bar 2. Once the cartridge assembly 14 is secured, the valve assembly 13 may be releasably coupled to the spray body 12. For example, the valve assembly 13 may include an external thread 34 configured to threadably engage with the internal thread 36 of the spray body 12. It should be understood that the valve assembly 13 may be releasably coupled to the spray body 12 and / or the cartridge assembly 14 by various other methods as needed. A sealing element 47 may be provided between the valve assembly 13 and the spray body 12 to form a substantially fluid-tight seal between them and prevent fluid leakage from the spray bar 2.

[0053] Turn now Figure 9-25 This document describes various exemplary embodiments of the spray rods 2, 2′, 2′′ and their components according to the present disclosure. Many similarities exist between the various embodiments; only the differences between the embodiments will be discussed in detail. It should be understood that similar structures in the various embodiments have similar uses.

[0054] exist Figure 9 and 10 In the illustrated embodiment, valve assembly 13 includes a housing 22 having a flow control valve 20, a piston 60, and a biasing element 64 disposed therein. Valve assembly 13 can be configured to allow, for example, to stop or regulate the flow of fluid from a fluid source during use, and / or to allow the spray body 12 to be removed from housing 22 for refilling and / or replacement of the cartridge assembly 14. Although housing 22 is shown as releasably coupled to spray body 12 via a threaded engagement, it should be understood that housing 22 and spray body 12 can be releasably coupled together in various other ways and methods as needed.

[0055] Valve assembly 13 serves as the input device for spray bar 12 and has several operating modes depending on the user-selected rotational position of flow control valve 20 relative to housing 22. Flow control valve 20 can be selectively positioned as follows: Figure 9 The "OFF" position shown and as follows Figure 10 The flow control valve 20 is shown between the "ON" and "OFF" positions. In the "OFF" position, the flow control valve 20 prevents the source fluid from flowing through the spray bar 2. Conversely, in the "ON" position, the flow control valve 20 allows the source fluid to flow through the spray bar 2.

[0056] In the depicted embodiment, the flow control valve 20 has a profile post that, when assembled, is located within a corresponding cylindrical interior space of the housing 22 and is held in place by a pin 81 pressed into the housing 22 while allowing the flow control valve 20 to rotate. A lever handle 55 may be provided on the profile post for the user to manually rotate and select whether to shut off the flow, guide the mixing to the barrel assembly 14, or guide it around the barrel assembly 14. Corresponding indicators may be provided on the housing 22 for user reference. The source fluid can enter the distal portion of the profile post of the flow control valve 20 (opposite to the lever handle 55) from either of two radially opposed input channels relative to their axes of rotation, nominally referred to herein as the mixing input channel 53 (corresponding to the entry into the barrel assembly 14) and the bypass input channel 54 (corresponding to the bypass into the barrel assembly 14).

[0057] When either the mixing input channel 53 or the bypass input channel 54 is directed rearward toward and aligned with the single input opening 76 passing through the inner wall 78 of the housing 22, the source fluid is able to flow into and along the interior of the profile post of the flow control valve 20. In this way, each state corresponds to one of the two open positions of the flow control valve 20 and the corresponding open state of the valve assembly 13.

[0058] The source fluid can exit the flow control valve 20 from either of the two output channels, depending on the rotational position of the profile column relative to the housing 22. These two output channels, referred to as the mixing output channel 57 and the bypass output channel 59, are offset along the axis of rotation between the lever handle 55 and the distal portion, and oriented in opposing radial directions so that they align with the corresponding output openings through the wall of the housing 22 in an alternating sequence corresponding to the mixing and bypassing patterns of the spray bar 2 as the flow control valve 20 rotates. The output openings, referred to as the mixing output opening 63 and the bypass output opening 64, are similarly offset along the axis of rotation, but oriented in a common radial direction, i.e., forward toward the spray body 12 and the cartridge assembly 14. When either the mixing output channel 57 or the bypass output channel 59 is directed forward and aligned with the corresponding one of the mixing output opening 63 or the bypass output opening 64, the source fluid can flow forward along the interior of the flow control valve 20 and exit therefrom.

[0059] To provide an improved seal within the housing 22, a stop gasket 80 can be provided on the profile post. The stop gasket 80 is designed to move circumferentially about the axis of rotation as the flow control valve 20 rotates. As shown, the stop gasket 80 is positioned radially opposite the mixing output passage 57 and the bypass output passage 59 to seal one of the corresponding output openings 63, 64 formed through the wall of the housing 22. Thus, when either the mixing output passage 57 or the bypass output passage 59 is guided forward by the user to align with the corresponding mixing output opening 63 or bypass output opening 64, one of the stop gaskets 80 is radially opposed and seals the unselected output opening 63, 64. The profile post is sealingly engaged with the housing 22 by one or more sealing elements 79 (e.g., O-rings) to prevent fluid leakage between the output passages 57, 59 and fluid leakage from the valve assembly 13.

[0060] As shown in the figure, the flow control valve 20 includes a reciprocating piston 60 equipped with a sealing element 62. When the piston 60 is in the "OFF" position (i.e., the sealed position), the sealing element 62 prevents undesirable forward flow and leakage of the source fluid corresponding to the "OFF" position of the flow control valve 20 and the "OFF" state of the valve assembly 13. In this way, the piston 60 and the sealing element 62 serve to prevent the forward flow of the source fluid into the inlet opening 76 through the wall 78 of the housing 22. Conversely, when the piston 60 is in the "ON" position ("Open"), forward flow of the source fluid corresponding to one of the "ON" positions of the flow control valve 20 and the "ON" state of the valve assembly 13 is permitted.

[0061] In some embodiments, the piston 60 includes an elongated body 65 having a first end 66 and an opposing second end 68. A retaining element 69 may be employed to maintain the position of the piston 60 within the housing 22 and as a stop for the biasing element 64. Figure 9 and 10 As shown, retaining element 69 may include one or more fluid passages 73 to allow source fluid to flow through them. Retaining element 69 may be coupled to housing 22 via a threaded connection. However, it should be understood that retaining element 69 may be coupled to housing 22 in various other ways as needed. First end 66 of piston 60 may include outwardly extending protrusions 70 (e.g., ribs) forming one or more flow channels 71 in body 65. In some embodiments, each flow channel 71 extends along the entire length of protrusion 70. However, it should be understood that flow channels 71 may have any size, shape, and configuration as needed. It should also be understood that protrusions 70 may be integrally formed with body 65 if needed. As a non-limiting example, protrusions 70 may be configured such that first end 66 of piston 60 has a generally X-shaped cross-section. Various other configurations of protrusions 70 may be adopted. For example, piston 60 may have more protrusions 70 than shown and be configured such that first end 66 of piston 60 has a generally star-shaped cross-section. As shown in the figure, the second end 68 can be tapered, having a generally circular cross-sectional shape. However, it should be understood that the first end 66 and the second end 68 can have any shape, size, and configuration as required. An annular flange 72 can be disposed on the body 65 between the first end 66 and the second end 68. The axial face 74 of the flange 72 can serve as the seat surface of the sealing element 62. The flange 72 can also serve as a stop for the biasing element 64 relative to the retaining element 69, thereby holding the biasing element 64 between them.

[0062] When the flow control valve 20 is in the "OFF" position, the piston 60 is also in the "OFF" position. The sealing element 62 forms a fluid-tight seal between the inner surface of the housing 22 and the piston 60 to close the inlet opening 76 formed in the inner wall 78 of the housing 22 and prevent the flow of source fluid through the flow passage 71 of the piston 20 and thus through the spray bar 2. The biasing element 64 is compressed during the assembly of the spray bar 2, continuously biasing the piston 60 forward toward the sealing position, causing the sealing element 62 to be biased toward the inlet opening 76 and the inner surface of the wall 78.

[0063] When the flow control valve 20 is in the "ON" position, the piston 60 is also in the "ON" position, and the sealing element 62 is spaced apart from the inner surface of the wall 78 of the housing 22 to allow the flow of source fluid through the flow passage 71 of the piston 60 and the inlet opening 76 of the housing 22. Thus, the flow of fluid is allowed through the spray bar 2. As described above, the biasing force of the biasing element 64 pushes the piston 60 into the "OFF" position. Therefore, the flow control valve 20 is configured to apply a reaction force on the piston 60 greater than the biasing force of the biasing element 64 to move the piston 60 to the "ON" position when the flow control valve 20 is required. In a particular embodiment, the force of the flow control valve 20 acting on the piston 60 overcomes the biasing force of the biasing element 64, compressing the biasing element 64 toward the holding element 69. Preferably, the compression ratio of the biasing element 64 is from about 2.5 psi to about 6.5 psi, more preferably about 4.7 psi. It should be understood that, if necessary, various types of biasing elements (such as helical springs) can be used as biasing elements 64.

[0064] In some embodiments, once the flow control valve 20 rotates away from either closed "OFF" position, the piston 60 is pressed backward away from the sealed position. When either the mixing input channel 53 or the bypass input channel 54 is directed toward the input opening 76, corresponding to the mixing and bypass states, the biased piston 60 is pushed and held backward away from the sealed position, thereby opening the valve assembly 13 to allow source fluid to enter. A corresponding cam 83 is positioned in the opening of each of the mixing input channel 53 and the bypass input channel 54 of the flow control valve 20, pushing and holding the piston 60 backward away from the sealed position relative to the biasing element 64. The forward face of the first end 66 of the piston 60 may be substantially planar to smoothly engage either cam as the flow control valve 20 rotates. Each cam 83 branches its corresponding input channel 53, 54.

[0065] When the source fluid flows out from the fluid source, the fluid enters the valve assembly 13, flows through the fluid passage 73 of the retaining element 69, bypasses and passes the unpositioned piston 60, and along the flow passage 71 into the aligned mixing input passage 53 or bypass input passage 54. The source fluid enters either the flow control valve 20 in the open "ON" position, corresponding to either the rearward-directed mixing input passage 53 or bypass input passage 54, travels along the interior of the profile column, and exits the flow control valve 20 through either the forward-directed mixing output passage 57 or bypass output passage 59. From there, the fluid flows through either the mixing output opening 63 or bypass output opening 64, thereby exiting the valve assembly 13 and entering the spray body 12.

[0066] In a particular embodiment, housing 22 may have a hose nut 18 at the source end 16 of spray bar 2. A fluid source may be releasably coupled and fluidly connected to the hose nut 18. In a non-limiting example, the end of a hose may be received and releasably coupled to the hose nut 18. A sealing element 27 may be disposed within the hose nut 18 to form a substantially fluid-tight seal between the hose, housing 22, and hose nut 18, and to prevent fluid leakage between them. The sealing element 27 may be configured to prevent accidental and unintended misalignment and / or deformation within the hose nut 18 that could lead to fluid leakage from spray bar 2.

[0067] exist Figure 11-14 In the exemplary embodiment of the sealing element 27 shown, the sealing element 27 includes a body 85 having one or more surface features 86 for engaging with a hose nut 18. The surface features 86 may be configured to seat between the internal threads of the hose nut 18 to maintain the position of the sealing element 27 within the hose nut 18. Although it should be understood that other surface features and / or engagement methods may be used to maintain the position of the sealing element 27. As shown, the body 85 of the sealing element 27 may also include an annular hub portion 87 having a generally planar contact area 88. The contact area 88 is configured to mate with a chamfered end 84 of the housing 22, such as... Figure 9 and 10 As shown, this increases the contact area between the sealing element 27 and the housing 22. This enhanced engagement forms a essentially fluid-tight seal between them and reduces the risk of fluid leakage from the spray bar 2.

[0068] Figure 15-16 Another exemplary embodiment of the valve assembly 13' for the spray bar 2' is depicted, which has an alternative design for the piston 160, such as... Figure 17 To show more clearly. The spray bar 2′ is the same as described in this article and Figure 1-14 The spray bar 2 shown is similar in structure to the one indicated by the same reference numerals and marked with an apostrophe (′). For simplicity, the following description will refer only to the reference numerals without the apostrophe. Figure 17 As most clearly shown, piston 160 may include an annular hub 178 formed near flange 172. As... Figure 15 and 16 As shown, the outer periphery of hub 178 can be used as another seat surface of sealing element 62′ to improve the fluid tightness seal between the inner surface of housing 22′ and piston 160 to close inlet opening 76′ and prevent the flow of source fluid through flow channel 171 formed by protrusion 170 of piston 160, thereby preventing it from passing through valve assembly 13′.

[0069] exist Figure 18 and 19In another exemplary embodiment of the spray bar 2′′ shown, the valve assembly 13′′ includes an alternative design of piston 260 and sealing element 262, such as Figure 20-24 To illustrate more clearly, the spray bar 2′′ is as described herein and Figure 1-17 The spray bars 2 and 2' shown are similarly identified by the same reference numerals and marked with double apostrophes (′′). For simplicity, the following description will refer only to the non-appositive reference numerals. Specifically, valve assembly 13′′ includes an overmolded seal 262 as a sealing element 262 on piston 260, instead of free sealing elements 62, 62′ (e.g., O-rings). The advantage of the overmolded seal 262 over the use of free sealing elements 62, 62′ is that it minimizes deformation, which adversely affects fluid flow when flow control valves 20, 20′ are in the "ON" position and valve assembly 13, 13′ is in the "ON" state, and causes leakage of the source fluid when flow control valves 20, 20′ are in the "OFF" position and valve assembly 13, 13′ is in the "OFF" state. Furthermore, the overmolded seal 262 remains attached to piston 260 without separating even when exposed to relatively high-pressure fluid flow. Furthermore, the overmolded sealing element 262 reduces errors during the assembly of the valve assembly 13′′. Therefore, the overmolded sealing element 262 provides a further improvement to the valve assembly 13′′ compared to the prior art and other embodiments of this disclosure.

[0070] In some cases, the flange 272 of the piston 260 includes one or more openings 282, each opening having, as shown in the figure Figure 19The mechanical cut shown is used to maintain the position of the sealing element 262 on the piston 260 and to prevent undesirable removal of the sealing element 262 from it. Preferably, the sealing element 262 can be made of ethylene propylene diene monomer (EPDM) rubber material, because EPDM material exhibits minimal compression set under the biasing force of the biasing element 64'' when the flow control valve 20'' is in the "OFF" position and the valve assembly 13'' is in the "OFF" state. According to American Society for Testing and Materials (ASTM) D2000 (125°C, 22hr), the compression set of EPDM is approximately 25%, while that of thermoplastic vulcanizates is approximately 40%, and that of thermoplastic elastomers (styrene block copolymers) is approximately 92%. However, it should be understood that the sealing element 262 can be formed from various other materials if desired, such as nitrile rubber (i.e., Buna-N), fluororubber (e.g., Viton™, a brand of Chemours), etc. The size design of the sealing element 262 allows a certain amount of fluid to flow around the piston 260. In a non-limiting example, the sealing element 262 may have a diameter of about 12 mm and a thickness of about 2 mm. It should be understood that the sealing element 262 can be produced from any elastically deformable material and has any desired shape, size, and configuration to achieve the desired seal and fluid flow around the piston 260.

[0071] Figure 25 and 26 The illustration shows yet another alternative design for the Piston 360. The Piston 360 is similar to that described in this article and... Figure 20-24Similar structures to the piston 260 shown are identified by the same reference numerals and marked with apostrophe (′′′). For simplicity, the following description will refer to non-appositive reference numerals. Specifically, the piston 360 includes an elongated body 365 having a first end 366 and an opposing second end 368. The first end 366 of the piston 360 may include outwardly extending protrusions 370 (e.g., ribs). Each of the protrusions 370 may include a chamfer 375 to provide improved tactile feedback to the user when the flow control valve is activated. In some embodiments, the angle of the chamfer 375 may be approximately 45 degrees relative to the central axis of the piston 360. It should be understood that the chamfer 375 can be formed at any suitable angle as needed. As shown, the protrusions 370 form one or more flow channels 371 in the body 365. Each flow channel 371 extends along the entire length of the protrusion 370. The protrusions 370 may be configured such that the first end 366 of the piston 360 has a generally X-shaped cross-section. However, it should be understood that the piston 360 may have more protrusions 370 than shown, and may be configured such that the first end 366 of the piston 360 has a generally star-shaped cross-section. As shown, the second end 368 may be tapered, having a generally circular cross-sectional shape. However, it should be understood that the first end 366 and the second end 368 may have any desired shape, size, and configuration. An annular flange 272′′′ may be disposed on the body 365, located between the first end 366 and the second end 368. The axial face 274′′′ of the flange 272′′′ may be used as the seat surface of the sealing element 262′′′.

[0072] There are many benefits associated with the spray sticks 2, 2′, 2′′ and their related components disclosed herein. The benefits of spray sticks 2, 2′, 2′′ include, but are not limited to: ergonomic design, easy refilling, longer chemical duration, longer spray distance and reach, easy observation of refill / transparency, versatility of motion, metrological benefits, improved safety, and lighter weight of solid chemicals for easier transport and use.

[0073] The spray sticks 2, 2', 2'' of this disclosure are ergonomically designed, for example, by providing balance to the user through a hose connected to the handle, allowing the consumer to use the spray sticks 2, 2', 2'' with one hand while cleaning, instead of needing to use both hands. The use of solid chemicals in the spray sticks 2, 2', 2'' of this disclosure makes them lighter than other products that require water as part of their formulated chemicals.

[0074] Based on the foregoing description, those skilled in the art can readily identify the essential features of this disclosure, and various changes and modifications can be made to this disclosure to adapt it to various uses and conditions without departing from its spirit and scope.

Claims

1. A spray stick, comprising: A spray body equipped with nozzles; a valve assembly coupled to the spray body; And a cartridge assembly disposed in the spray body, the cartridge assembly including a cartridge, the cartridge including: a tubular member having a proximal end and a distal end; and a plurality of pores formed in the distal end of the tubular member, wherein the pores are arranged in an opposing radial array.

2. The spray bar of claim 1, wherein at least one of the pores has a diameter of about 0.050 inches to about 0.150 inches.

3. The spray bar according to claim 1, wherein the cartridge comprises eight pores.

4. A spray stick, comprising: A spray body equipped with nozzles; A cartridge assembly disposed within the spray body; and a valve assembly coupled to the spray body, the valve assembly comprising: A housing with chamfered ends and a flexible hose nut; A first sealing element disposed within the hose nut, wherein the first sealing element is configured to seal against a chamfered end of the housing; a flow control valve disposed within the housing; and a piston disposed within the housing, the piston having a second sealing element, wherein the piston is selectively positioned between a first position and a second position, wherein the first position is positioned to prevent fluid from flowing through the valve assembly, and the second position is positioned to allow fluid to flow through the valve assembly.

5. The spray bar of claim 4, wherein the first sealing element comprises a body having an annular hub portion.

6. The spray bar of claim 5, wherein the annular hub portion includes a generally planar contact area configured to engage with a chamfered end of the housing to form a generally fluid-tight seal therebetween.

7. The spray bar of claim 4, wherein the piston comprises one or more protrusions forming a fluid channel at one end thereof.

8. The spray bar of claim 4, wherein the piston comprises an annular flange having a seat surface for the sealing element.

9. The spray bar of claim 4, wherein the piston comprises an annular hub having a seat surface for the second sealing element.

10. The spray bar according to claim 4, wherein the second sealing element is an O-ring.

11. The spray bar according to claim 4, wherein the second sealing element is an overmolded sealing element.

12. The spray bar according to claim 4, wherein the second sealing element is made of at least one of the following materials: ethylene propylene diene monomer (EPDM) rubber, nitrile rubber, and / or fluororubber.

13. The spray bar of claim 4, wherein the second sealing element has a compression set of about 25%.

14. The spray bar of claim 4, further comprising a biasing element for applying a biasing force on the piston, wherein the biasing force is about 2.5 psi to about 6.5 psi.

15. The spray bar of claim 14, wherein the biasing element pushes the piston into the first position.

16. A spray stick, comprising: A spray body equipped with a nozzle, the nozzle comprising: Movable components; And an orifice formed in the movable member, the orifice having an inlet opening and an outlet opening, wherein the orifice includes an inner surface inclined inward toward the centerline of the orifice; Valve assembly coupled to the spray body; And the feed cylinder assembly set in the spray body.

17. The spray bar of claim 16, wherein the inner diameter of the orifice gradually decreases from the inlet opening of the orifice to its outlet opening.

18. The spray bar of claim 16, wherein the orifice has an inner diameter of approximately 0.170 inches at the inlet opening and an inner diameter of approximately 0.110 inches at the outlet opening.

19. The spray bar of claim 16, wherein the inner surface of the orifice is inclined at an angle of about 0 degrees to about 45 degrees relative to the centerline.

20. The spray bar of claim 16, wherein the inner surface of the orifice is inclined at an angle of approximately 6.5 degrees relative to the centerline.

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