Nozzle attachment for a high-pressure cleaning system

Abstract

Nozzle attachments and high-pressure cleaning systems are provided. A nozzle attachment includes a dome body that extends from a base to a terminal edge. The dome body defines an interior that extends to an opening at the terminal edge. The nozzle attachment further includes an overmold that at least partially surrounds the dome body. The overmold extending beyond the terminal edge of the dome body to a contact edge.

Description

FIELD

[0001] The present disclosure relates generally to a nozzle attachment for a sprayer of a high-pressure cleaning system.BACKGROUND

[0002] High pressure cleaning systems, such as pressure washers, high pressure sprayers, etc., are typically used for providing a continuous flow of pressurized fluid to a surface or object in order to remove dust, dirt, and debris therefrom. High pressure cleaning systems typically include a compressor for pressurizing the fluid, a pump, and a sprayer (e.g., a sprayer wand). High pressure cleaning systems may be used for cleaning various objects or surfaces, such as sidewalks, driveways, automotive equipment (such as car body panels, wheels, tires, etc.), aerospace equipment, or other suitable objects and surfaces.

[0003] However, problems exist with the use of many known high pressure cleaning systems. For example, when using a high-pressure cleaning system on a painted surface (such as car body panels), the pressurized fluid may remove paint from the painted surface, which is typically undesired. Additionally, the speed and pressure of the fluid at an outlet of the sprayer can pose a safety threat and potentially cause harm to a user if handled incorrectly.

[0004] Accordingly, an improved attachment for a sprayer of a high-pressure cleaning system is desired and would be appreciated in the art. Specifically, an improved attachment that addresses the above issues is desired.BRIEF DESCRIPTION OF THE DRAWINGS

[0005] A full and enabling disclosure of the present invention, including the best mode of making and using the present systems and methods, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures, in which: FIG. 1 illustrates a perspective exploded view of a high-pressure cleaning system in accordance with embodiments of the present disclosure; FIG. 2 illustrates a perspective view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 3 illustrates a perspective exploded view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 4 illustrates a perspective exploded view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 5 illustrates a side view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 6 illustrates a side view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 7 illustrates a bottom view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 8 illustrates a cross-sectional view of the nozzle attachment from along the line 8-8 shown in FIG. 6 in accordance with embodiments of the present disclosure; and FIG. 9 illustrates a cross-sectional view of the nozzle attachment from along the line 9-9 shown in FIG. 5 in accordance with embodiments of the present disclosure. DETAILED DESCRIPTION

[0006] Reference now will be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the drawings. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Moreover, each example is provided by way of explanation, rather than limitation of, the technology. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present technology without departing from the scope or spirit of the claimed technology. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present disclosure covers such modifications and variations as come within the scope of the appended claims and their equivalents. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention.

[0007] As used herein, the terms "first", "second", and "third" may be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components. The singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. The terms "coupled," "fixed," "attached to," and the like refer to both direct coupling, fixing, or attaching, as well as indirect coupling, fixing, or attaching through one or more intermediate components or features, unless otherwise specified herein. As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of features is not necessarily limited only to those features but may include other features not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, "or" refers to an inclusive- or and not to an exclusive- or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).

[0008] The term "radially" refers to the relative direction that is substantially perpendicular to an axial centerline of a particular component; the term "axially" refers to the relative direction that is substantially parallel and / or coaxially aligned to an axial centerline of a particular component; and the term "circumferentially" refers to the relative direction that extends around the axial centerline of a particular component.

[0009] Terms of approximation, such as "about," "generally," "approximately," or "substantially," include values within ten percent greater or less than the stated value. When used in the context of an angle or direction, such terms include within ten degrees greater or less than the stated angle or direction. For example, "generally vertical" includes directions within ten degrees of vertical in any direction, e.g., clockwise or counter-clockwise.

[0010] Benefits, other advantages, and solutions to problems are described below with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any feature(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature of any or all the claims.

[0011] The accompanying figures and description illustrate embodiments of connectors and connection methods in accordance with various embodiments of the present disclosure.

[0012] FIG. 1 illustrates a perspective view of a high-pressure cleaning system 100, such as a pressure washer or other high-pressure sprayer, in accordance with embodiments of the present disclosure. The high-pressure cleaning system 100 includes a high-pressure cleaner 102 (e.g., a pressure washer), which may include a power supply, one or more compressors for pressurizing a fluid, one or more valves, one or more switches. The high pressure cleaner 102 may receive a fluid, such as water or other fluid, from a fluid supply, and the high pressure cleaner 102 may pressurize the fluid (e.g., with one or more compressors) to provide a pressurized fluid to an outlet hose 104. System 100 is an electric AC powered system but other types of high pressure cleaners may also be employed such as electric DC powered or internal combustion engine powered, as well as systems with other types of pumps (e.g., other types of dynamic or positive displacement pumps).

[0013] The outlet hose 104 may fluidly couple to an inlet 109 of a gun or handle 106. The handle 106 may include a trigger 108. Pulling the trigger may actuate a valve within the handle 106, which permits the pressurized fluid to flow from the inlet 109 to an outlet 110 of the handle 106. In this way, pressurized fluid may be selectively provided by the handle 106 when a user pulls the trigger 108. The outlet 110 of the handle 106 may be fluidly coupled to a wand 112 (or lance) via a threaded connection (like that shown in FIG. 1) or another connection such as a quick connect adapter (e.g., like the adapter shown on wand inlet end 114) that could couple directly to a nozzle 200. The wand 112 may extend from an inlet end 114 to an outlet end 116. In some embodiments, the wand 112 may be arcuate or may include one or more curved portions. In other embodiments (not shown), the wand may be entirely straight. The wand 112 may define a total length 118 measured from the inlet end 114 to the outlet end 116, including any curvatures.

[0014] As would be appreciated by those of ordinary skill in the art, Underwriters Laboratories (UL) set safety standards for various machines. Compliance with these standards allows the machine to be labeled with the UL Mark, which is a symbol of trusted safety and performance. UL Standard 1776 sets the safety standards for high-pressure cleaning machines. Section 55.3 of UL Standard 1776 requires that wands or lances be at least 29.5 inches long with one exception. The exception states that the wand or lance may be less than 29.5 inches long so long as it can be demonstrated that a shorter length does not present a risk of skin injection, as determined by compliance with Injection Test, as set forth in Section 55A of UL Standard 1776.

[0015] In exemplary embodiments, the total length 118 of the wand 112 of the high-pressure cleaning system 100 may be less than about 29.5 inches. Particularly, the total length 118 of the wand 112 may be between about 6 inches and about 10 inches, or such as between about 7 inches and about 9 inches, or such as about 8 inches. Utilizing a wand 112 having a total length less than about 29.5 inches advantageously provides for increased outlet pressure, decreased material cost, and easier handling under some circumstances (e.g., automotive cleaning). However, this feature does not meet the requirement set forth in Section 55.3 of UL Standard 1776 as described above.

[0016] In exemplary embodiments, as shown, the high-pressure cleaning system 100 may further include one or more nozzle attachments 200, which may be removably couplable to a nozzle 300. The nozzle 300 may be removably couplable to the outlet end 116 of the wand 112. In addition to other advantages set forth below in more detail, the nozzle attachments 200 allow the high-pressure cleaning system 100 to meet the exception to the requirement set forth in Section 55.3 of UL Standard 1776 by being compliant with the Injection Test set forth in Section 55A of UL Standard 1776, thereby enabling the use of a shorter wand. For example, the nozzle attachments 200 may each include a dome body 202 that enables a user to press the nozzle attachment 200 directly against a surface (e.g., a car body panel or other surface) to clean the surface without causing damage to the surface. The nozzle also helps prevent injection of the fluid through a person's skin should the nozzle inadvertently contact a person's (e.g., user's) skin.

[0017] In some embodiments, the high-pressure cleaning system 100 may further include a foam sprayer 120 and one or more additional hoses 122. The foam sprayer 120 may be couplable to the outlet hose 104, the handle 106, and / or to the wand 112 in various embodiments. The foam sprayer 120 may include a tank for storing detergent and one or more nozzles for ejecting the detergent as a foam spray. The one or more additional hoses 122 may be used as an inlet hose (e.g., for fluidly coupling the high pressure cleaner 102 to a fluid supply) or may be used as an extension hose couplable to the outlet hose 104.

[0018] Referring now to FIGS. 2 through 9, various views of a nozzle attachment 200 are illustrated in accordance with embodiments of the present disclosure. The nozzle attachment 200 may be utilized with a high-pressure cleaning system (such as the high-pressure cleaning system 100 described above with reference to FIG. 1). Particularly, FIG. 2 illustrates a perspective view of the nozzle attachment 200; FIG. 3 illustrates a first perspective and exploded view of the nozzle attachment 200; FIG. 4 illustrates a second perspective and exploded view of the nozzle attachment 200; FIG. 5 illustrates a first side view of the nozzle attachment 200; FIG. 6 illustrates a second side view of the nozzle attachment 200; FIG. 7 illustrates a bottom view of the nozzle 200; FIG. 8 illustrates a cross-sectional view of the nozzle attachment 200 from along the line 8-8 shown in FIG. 6; and FIG. 9 illustrates a cross-sectional view of the nozzle attachment 200 from along the line 9-9 shown in FIG. 5.

[0019] As shown, the nozzle attachment 200 may define an axial centerline 201 and a cylindrical coordinate system relative to the axial centerline 201. The cylindrical coordinate system may include an axial direction A defined along the axial centerline 201, a radial direction R perpendicular to the axial direction A, and a circumferential direction C extending around the axial direction A.

[0020] As shown, the nozzle attachment 200 may be couplable to a nozzle 300. For example, in exemplary embodiments, the nozzle attachment 200 is fixedly coupled to the nozzle 300 such that the nozzle attachment 200 does not move or rotate relative to the nozzle 300. The nozzle attachment 200 may include a dome body 202 that extends (e.g., axially) from a base 204 to a terminal edge 206. The dome body 202 may define an interior 208 that extends (e.g., axially) to an opening 205 at the terminal edge 206. The nozzle attachment 200 may further include an overmold 210 that at least partially surrounds (e.g., entirely surrounds in some embodiments) the dome body 202. More particularly, in some embodiments, the overmold 210 may entirely surround an exterior surface of the dome body 202. The overmold 210 may extend (e.g., axially) beyond the terminal edge 206 of the dome body 202 to a contact edge 214.

[0021] As shown in FIGS. 3, 8, and 9, the dome body 202 of the nozzle attachment 200 may define a channel 220. As shown in FIGS. 8 and 9, the channel 220 may extend generally axially along the axial centerline 201 from the base 204 to an inner surface 222. The inner surface 222 may partially define the interior 208. Particularly, the inner surface 222 may define the axially innermost portion of the interior 208, and the inner surface 222 may extend generally radially (e.g., perpendicular to the axial direction A).

[0022] The nozzle attachment 200 may be couplable to the nozzle 300 via an interference fit or a friction fit. For example, the nozzle 300 may be inserted or pressed into the channel 220 and may remain coupled to the dome body 202 via an interference fit. An interference fit (otherwise known as a press fit or friction fit), is a fit between two parts in which the external dimension of one part slightly exceeds the internal dimension of the part into which it has to fit. In many embodiments, the nozzle attachment 200 may be fixedly coupled to the nozzle 300, such that relative movement between the nozzle attachment 200 and the nozzle 300 is prevented. This advantageously ensures that the nozzle outlet is properly aligned with the dome body 202, such that the plane of fluid spray does not contact the dome body 202. For example, in the present case, the dimensions of the external surface of the nozzle 300 may slightly exceed the internal dimension of the channel 220. Additionally, in various embodiments, the nozzle 300 may further include one or more protrusions 302 extending radially outwardly from the nozzle 300. The one or more protrusions 302 may extend within the channel 220 and contact the dome body 202 to form the interference fit therewith. The one or more protrusions 302 may be annular, such that they each extend entirely about the nozzle 300. In various embodiments, the dome body 202 may further include a shoulder portion 224 extending radially into the channel 220. The shoulder portion 224 may define an annular lip 227 that contacts at least one of the protrusions 302. This advantageously ensures that an outlet 304 of the nozzle 300 is flush with the inner surface 222 of the dome body 202 after the nozzle 300 is inserted into the channel 220.

[0023] In exemplary embodiments, the dome body 202 may be formed from a first material, and the overmold 210 may be formed from a second material. The second material may be different than the first material. Particularly, the dome body 202 may be formed from a rigid material, which advantageously provides for structural integrity to the nozzle attachment. For example, the dome body 202 may be formed from a nylon material, such as a glass-filled nylon.

[0024] The overmold 210 may be formed from a compliant (or non-rigid material), such as an elastomeric material in exemplary embodiments. For example, the overmold 210 may be formed from a thermoplastic elastomer (TPE) and / or a thermoplastic polyurethane (TPU). TPE and TPU may be particularly advantageous due to the gas and oil resistance of these materials. Additionally, forming the overmold 210 from a compliant material, such as an elastomeric material, advantageously allows for the contact edge 214 to contact a cleaning surface (such as a painted cleaning surface) without causing damage thereto (e.g., chipped paint or other damage that could otherwise occur if the overmold were rigid).

[0025] In many embodiments, the dome body 202 may further include end wall portions 228 and side wall portions 230. The end wall portions 228 may be spaced apart from one another and may extend between the side wall portions 230. Similarly, the side wall portions 230 may be spaced apart from one another and may extend between the end wall portions 228. As shown in FIGS. 8 and 9, the end wall portions 228, the side wall portions 230, and the inner surface 222 may collectively define the interior 208.

[0026] Similarly, in such embodiments, the overmold 210 may include end portions 238 and side portions 240. The end portions 238 may extend between the side portions 240. In many embodiments, the end portions 238 of the overmold 210 may couple to and extend on the end wall portions 228 of the dome body 202. Likewise, the side portions 240 of the overmold 210 may couple to and extend on the side wall portions 230 of the dome body 202. In this way, the side portions 240 and the end portions 238 may collectively surround the dome body 202.

[0027] In certain embodiments, as shown in FIGS. 2 through 4, the dome body 202 may include a lip 242 to which the overmold 210 extends. The lip 242 may protrude from the dome body 202. The overmold 210 does not extend (e.g., axially) beyond the lip 242 as shown in FIG. 2. The lip 242 may be annular. For example, the lip 242 may extend along the side wall portions 230 and the end wall portions 228 continuously. On the side wall portions 230, the lip 242 may be positioned closer to the terminal edge 206 than the base 204. By contrast, on the end wall portions 228, the lip 242 may be positioned closer to the base 204 than the terminal edge 206 of the dome body 202. The lip 242 may advantageously prevent the overmold 210 from slipping upwards relative to the dome body 202. Additionally, the lip 242 may provide additional leverage when a user is gripping the dome body 202.

[0028] As shown in FIGS. 8 and 9, the side wall portions 230 may have a larger width than the end wall portions 228. For example, as shown in FIG. 8, the side wall portions 230 may define a first width 232 between the end wall portions 228 (e.g., between a first end wall portion and a second end wall portion). Additionally, as shown in FIG. 9, the end wall portions 228 may define a second width 234 between the side wall portions 230 (e.g., between a first side wall portion and a second side wall portion). The first width 232 may be larger than the second width 234 (such as about 200% longer, or such as about 150% longer, or such as about 100% longer, or such as about 75% longer, or such as about 50% longer, or more or less).

[0029] Additionally, as shown in FIG. 8, the end wall portions 228 may diverge away from one another as the end wall portions 228 extend towards the terminal edge 206. More particularly, the end wall portions 228 may diverge away from one another (and away from the axial centerline 201) as the end wall portions 228 extend from the inner surface 222 to the terminal edge 206. Similarly, as shown in FIG. 9, the side wall portions 230 may diverge away from one another as the side wall portions 230 extend towards the terminal edge 206. More particularly, the side wall portions 230 may diverge away from one another (and away from the axial centerline 201) as the side wall portions 230 extend from the inner surface 222 to the terminal edge 226.

[0030] In this way, both the first width 232 and the second width 234 may increase (e.g., gradually and / or continually increase) as the dome body 202 extends from the inner surface 222 to the terminal edge 206. In other words, an axial-radial cross-sectional area (i.e., a cross-sectional area taken in an axial-radial plane, such as the plane shown in FIG. 7) of the interior 208 may increase (e.g., continually increase) as the dome body 202 extends towards the terminal edge 206. This may advantageously allow for the fan spray 306 to spread out for maximum coverage at the cleaning surface.

[0031] In many implementations, the nozzle 300 may define an outlet 304 that is configured to form a fan spray 306 of fluid. The outlet 304 may be oriented such that the fan spray 306 may aligns with the largest width of the dome body 202, in order to prevent the fan spray 306 from contacting the dome body 202 prior to reaching the outlet of the dome body 202. As shown FIG. 8, the nozzle 300 may be oriented relative to the nozzle attachment 200 such that the fan spray 306 spreads (or fans) the most in the direction of the first width 232 (which is the largest dimension of the interior 208). This advantageously allows the fan spray 306 to fully spread (or fan out) within the interior 208 without being impeded by the dome body 202.

[0032] In exemplary implementations, the nozzle attachment 200 may be utilized with a high-pressure cleaning system (such as the high-pressure cleaning system 100 described above with reference to FIG. 1) having a "short" or "stubby" wand or lance to allow for use of the high-pressure cleaning system without causing a safety risk or causing a risk of damaging the cleaning surface. Particularly, the nozzle attachment 200 may enable the use of a wand or lance that is less than 29.5 inches without causing a safety risk or causing a risk of damaging the cleaning surface (e.g., chipping paint, etc.).

[0033] Additionally, as shown in FIG. 8, the nozzle attachment 200 may further define a length 236 (e.g., an axial length) between the inner surface 222 and the contact edge 214. This distance allows for the fan spray 306 to reduce velocity slightly while maintaining an ideal force at the contact surface. The length 236 may be dependent at least partially on a pressure of the fluid at the outlet 304. For example, in exemplary embodiments, the length 236 may be between about 30 millimeters (mm) and about 50 mm when an outlet pressure of fluid at the nozzle is between about 1000 pounds per square inch (psi) and about 1400 psi. More specifically, in some embodiments, the length 236 may be between about 35 mm and about 45 mm when an outlet pressure of fluid at the nozzle is between about 1100 psi and about 1300 psi. In other embodiments, the length 236 may be between about 37.5 mm and about 42.5 mm when an outlet pressure of fluid at the nozzle is between about 1150 psi and about 1250 psi.

[0034] In many embodiments, as shown in FIG. 5, the overmold 210 may include a recessed edge 244. As shown by the dashed line in FIG. 5, the nozzle attachment 200 may be configured to engage a cleaning surface 245 (or plane of contact) at the contact edge 214. The recessed edge 244 may be spaced apart from the cleaning surface 245 when the nozzle attachment 200 is engaged therewith, thereby providing an outlet for used fluid to exit the interior 208. The recessed edge 244 may be spaced apart (e.g., axially) from the contact edge 214 such that a gap 246 is defined between the contact edge 214 and the recessed edge 244. Additionally, in many embodiments, the overmold 210 may include tapering edges 248 that extend between the contact edge 214 and the recessed edge 244. In various embodiments, as shown, both the recessed edge 244 and the tapering edges 248 may be defined by the side portion(s) 240 of the overmold 210. In many embodiments, the overmold 210 may include a pair of recessed edges 244 each defined in a respective side wall portion 240 of the overmold 210.

[0035] Referring back to FIGS. 3 and 4, in some embodiments, the dome body 202 may further define a plurality of dovetails 250 at the terminal edge 206. Each dovetail 250 of the plurality of dovetails 250 may be a recess in the dome body 202 at the terminal edge 206. The plurality of dovetails 250 may be spaced apart from one another (e.g., equally or unequally spaced apart). Additionally, as shown in FIG. 4, the overmold 210 may include a plurality of protrusions 252, which correspond in size and shape to the plurality of dovetails 250. The plurality of protrusions 252 may each extend into a respective dovetail of the plurality of dovetails 250. This increases the connection strength between the dome body 202 and the overmold 210.

[0036] Referring now to FIG. 7, in various embodiments, the dome body 202 may further include one or more radial supports 254. Each radial support may extend from the inner surface 222 to one of the side walls 230 or to one of the end walls 228. The radial supports 254 may advantageously increase the structural integrity of the dome body 202 while minimizing material usage, thereby reducing costs.

[0037] The nozzle attachment 200 described hereinabove provides several advantages compared to prior designs. For example, the dome body 202 and overmold 210 helps prevent direct contact between the outlet of the nozzle and a cleaning surface. This provides safety to a user and helps prevent damage to the surface. The overmold 210 being formed from an elastomeric material (such as a TPE or TPU) further helps prevent damage to a surface, such as a user or a car. The distance between the outlet of the nozzle and the end of the dome body may allow a user to place the nozzle attachment 200 against a surface, such as a car, to provide maximum cleaning, without damaging (e.g., scratching) the surface. The recessed edges 244 permit fluid to be ejected from the nozzle when the nozzle is placed against a surface.

[0038] This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.

[0039] These and further aspects and details of the invention are summarized by the subject matter of the following numbered clauses: 1. A nozzle attachment for coupling to a nozzle, the nozzle attachment comprising: a dome body extending from a base to a terminal edge, the dome body defining an interior that extends to an opening at the terminal edge; and an overmold at least partially surrounding the dome body, the overmold extending beyond the terminal edge of the dome body to a contact edge. 2. The nozzle attachment as in clause 1, wherein the dome body defines an opening at the base for coupling to a nozzle. 3. The nozzle attachment as in any preceding clause, wherein the overmold includes a recessed edge spaced apart from the contact edge. 4. The nozzle attachment as in any preceding clause, wherein the dome body comprises a first material, wherein the overmold comprises a second material, and wherein the first material is different than the second material. 5. The nozzle attachment as in any preceding clause, wherein the overmold comprises an elastomeric material. 6. The nozzle attachment as in any preceding clause, wherein the dome body further includes an inner surface that partially defines the interior, and wherein a length between the inner surface of the dome body and the contact edge of the overmold is between about 30 millimeters (mm) and about 50 mm when an outlet pressure of fluid at the nozzle is between about 1000 pounds per square inch (psi) and about 1400 psi. 7. The nozzle attachment as in any preceding clause, wherein the nozzle attachment defines an axial direction, a radial direction, and a circumferential direction, and wherein an axial-radial cross-sectional area of the interior increases as the dome body extends towards the terminal edge. 8. The nozzle attachment as in any preceding clause, wherein the dome body includes end wall portions and side wall portions, the side wall portions having a larger width than the end wall portions, the end wall portions being spaced apart from one another and extending between the side wall portions. 9. The nozzle attachment as in any preceding clause, wherein the side wall portions diverge away from one another as the side wall portions extend towards the terminal edge, and wherein the end wall portions diverge away from one another as the end wall portions extend towards the terminal edge. 10. The nozzle attachment as in any preceding clause, wherein the dome body further defines a plurality of dovetails at the terminal edge. 11. A high-pressure cleaning system comprising: a wand; and a nozzle having an outlet; a nozzle attachment according to any of the preceding clauses coupled the nozzle. 12. A high-pressure cleaning system comprising: a wand; and a nozzle having an outlet; a nozzle attachment coupled the nozzle, the nozzle attachment comprising: a dome body surrounding the outlet of the nozzle, the dome body extending from a base to a terminal edge, the dome body defining an interior that extends to an opening at the terminal edge; and an overmold at least partially surrounding the dome body, the overmold extending beyond the terminal edge of the dome body to a contact edge. 13. The high-pressure cleaning system as in any preceding clause, wherein the wand defines a total length that is less than 29.5 inches. 14. The high-pressure cleaning system as in any preceding clause, wherein the wand defines a total length that is between about 6 inches and about 12 inches. 15. The high-pressure cleaning system as in any preceding clause, wherein the dome body defines a channel at the base for coupling to a nozzle. 16. The high-pressure cleaning system as in any preceding clause, wherein the overmold includes a recessed edge spaced apart from the contact edge. 17. The high-pressure cleaning system as in any preceding clause, wherein the dome body comprises a first material, wherein the overmold comprises a second material, and wherein the first material is different than the second material. 18. The high-pressure cleaning system as in any preceding clause, wherein the overmold comprises an elastomeric material. 19. The high-pressure cleaning system as in any preceding clause, wherein the dome body further includes an inner surface that partially defines the interior, and wherein a length between the inner surface of the dome body and the contact edge of the overmold is between about 30 millimeters (mm) and about 50 mm when an outlet pressure of fluid at the nozzle is between about 1000 pounds per square inch (psi) and about 1400 psi. 20. The high-pressure cleaning system as in any preceding clause, wherein the nozzle attachment defines an axial direction, a radial direction, and a circumferential direction, and wherein an axial-radial cross-sectional area of the interior increases as the dome body extends towards the terminal edge. 21. The high-pressure cleaning system as in any preceding clause, wherein the dome body includes end wall portions and side wall portions, the side wall portions having a larger width than the end wall portions, the end wall portions being spaced apart from one another and extending between the side wall portions. 22. The high-pressure cleaning system as in any preceding clause, wherein the side wall portions diverge away from one another as the side wall portions extend towards the terminal edge, and wherein the end wall portions diverge away from one another as the end wall portions extend towards the terminal edge. 23. The high-pressure cleaning system as in any preceding clause, wherein the dome body further defines a plurality of dovetails at the terminal edge. 24. The high-pressure cleaning system as in any preceding clause, wherein the nozzle is configured to form a fan spray of fluid, wherein the nozzle is oriented relative to the nozzle attachment such that the fan spray spreads the most in the direction of a largest width of the dome body.

Examples

Embodiment Construction

[0006]Reference now will be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the drawings. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Moreover, each example is provided by way of explanation, rather than limitation of, the technology. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present technology without departing from the scope or spirit of the claimed technology. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present disclosure covers such modifications and variations as come within the scope of the appended claims and their equivalents. The...

FIELD

[0001] The present disclosure relates generally to a nozzle attachment for a sprayer of a high-pressure cleaning system.BACKGROUND

[0002] High pressure cleaning systems, such as pressure washers, high pressure sprayers, etc., are typically used for providing a continuous flow of pressurized fluid to a surface or object in order to remove dust, dirt, and debris therefrom. High pressure cleaning systems typically include a compressor for pressurizing the fluid, a pump, and a sprayer (e.g., a sprayer wand). High pressure cleaning systems may be used for cleaning various objects or surfaces, such as sidewalks, driveways, automotive equipment (such as car body panels, wheels, tires, etc.), aerospace equipment, or other suitable objects and surfaces.

[0003] However, problems exist with the use of many known high pressure cleaning systems. For example, when using a high-pressure cleaning system on a painted surface (such as car body panels), the pressurized fluid may remove paint from the painted surface, which is typically undesired. Additionally, the speed and pressure of the fluid at an outlet of the sprayer can pose a safety threat and potentially cause harm to a user if handled incorrectly.

[0004] Accordingly, an improved attachment for a sprayer of a high-pressure cleaning system is desired and would be appreciated in the art. Specifically, an improved attachment that addresses the above issues is desired.BRIEF DESCRIPTION OF THE DRAWINGS

[0005] A full and enabling disclosure of the present invention, including the best mode of making and using the present systems and methods, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures, in which: FIG. 1 illustrates a perspective exploded view of a high-pressure cleaning system in accordance with embodiments of the present disclosure; FIG. 2 illustrates a perspective view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 3 illustrates a perspective exploded view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 4 illustrates a perspective exploded view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 5 illustrates a side view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 6 illustrates a side view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 7 illustrates a bottom view of a nozzle attachment in accordance with embodiments of the present disclosure; FIG. 8 illustrates a cross-sectional view of the nozzle attachment from along the line 8-8 shown in FIG. 6 in accordance with embodiments of the present disclosure; and FIG. 9 illustrates a cross-sectional view of the nozzle attachment from along the line 9-9 shown in FIG. 5 in accordance with embodiments of the present disclosure. DETAILED DESCRIPTION

[0006] Reference now will be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the drawings. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Moreover, each example is provided by way of explanation, rather than limitation of, the technology. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present technology without departing from the scope or spirit of the claimed technology. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present disclosure covers such modifications and variations as come within the scope of the appended claims and their equivalents. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention.

[0007] As used herein, the terms "first", "second", and "third" may be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components. The singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. The terms "coupled," "fixed," "attached to," and the like refer to both direct coupling, fixing, or attaching, as well as indirect coupling, fixing, or attaching through one or more intermediate components or features, unless otherwise specified herein. As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of features is not necessarily limited only to those features but may include other features not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, "or" refers to an inclusive- or and not to an exclusive- or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).

[0008] The term "radially" refers to the relative direction that is substantially perpendicular to an axial centerline of a particular component; the term "axially" refers to the relative direction that is substantially parallel and / or coaxially aligned to an axial centerline of a particular component; and the term "circumferentially" refers to the relative direction that extends around the axial centerline of a particular component.

[0009] Terms of approximation, such as "about," "generally," "approximately," or "substantially," include values within ten percent greater or less than the stated value. When used in the context of an angle or direction, such terms include within ten degrees greater or less than the stated angle or direction. For example, "generally vertical" includes directions within ten degrees of vertical in any direction, e.g., clockwise or counter-clockwise.

[0010] Benefits, other advantages, and solutions to problems are described below with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any feature(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature of any or all the claims.

[0011] The accompanying figures and description illustrate embodiments of connectors and connection methods in accordance with various embodiments of the present disclosure.

[0012] FIG. 1 illustrates a perspective view of a high-pressure cleaning system 100, such as a pressure washer or other high-pressure sprayer, in accordance with embodiments of the present disclosure. The high-pressure cleaning system 100 includes a high-pressure cleaner 102 (e.g., a pressure washer), which may include a power supply, one or more compressors for pressurizing a fluid, one or more valves, one or more switches. The high pressure cleaner 102 may receive a fluid, such as water or other fluid, from a fluid supply, and the high pressure cleaner 102 may pressurize the fluid (e.g., with one or more compressors) to provide a pressurized fluid to an outlet hose 104. System 100 is an electric AC powered system but other types of high pressure cleaners may also be employed such as electric DC powered or internal combustion engine powered, as well as systems with other types of pumps (e.g., other types of dynamic or positive displacement pumps).

[0013] The outlet hose 104 may fluidly couple to an inlet 109 of a gun or handle 106. The handle 106 may include a trigger 108. Pulling the trigger may actuate a valve within the handle 106, which permits the pressurized fluid to flow from the inlet 109 to an outlet 110 of the handle 106. In this way, pressurized fluid may be selectively provided by the handle 106 when a user pulls the trigger 108. The outlet 110 of the handle 106 may be fluidly coupled to a wand 112 (or lance) via a threaded connection (like that shown in FIG. 1) or another connection such as a quick connect adapter (e.g., like the adapter shown on wand inlet end 114) that could couple directly to a nozzle 200. The wand 112 may extend from an inlet end 114 to an outlet end 116. In some embodiments, the wand 112 may be arcuate or may include one or more curved portions. In other embodiments (not shown), the wand may be entirely straight. The wand 112 may define a total length 118 measured from the inlet end 114 to the outlet end 116, including any curvatures.

[0014] As would be appreciated by those of ordinary skill in the art, Underwriters Laboratories (UL) set safety standards for various machines. Compliance with these standards allows the machine to be labeled with the UL Mark, which is a symbol of trusted safety and performance. UL Standard 1776 sets the safety standards for high-pressure cleaning machines. Section 55.3 of UL Standard 1776 requires that wands or lances be at least 29.5 inches long with one exception. The exception states that the wand or lance may be less than 29.5 inches long so long as it can be demonstrated that a shorter length does not present a risk of skin injection, as determined by compliance with Injection Test, as set forth in Section 55A of UL Standard 1776.

[0015] In exemplary embodiments, the total length 118 of the wand 112 of the high-pressure cleaning system 100 may be less than about 29.5 inches. Particularly, the total length 118 of the wand 112 may be between about 6 inches and about 10 inches, or such as between about 7 inches and about 9 inches, or such as about 8 inches. Utilizing a wand 112 having a total length less than about 29.5 inches advantageously provides for increased outlet pressure, decreased material cost, and easier handling under some circumstances (e.g., automotive cleaning). However, this feature does not meet the requirement set forth in Section 55.3 of UL Standard 1776 as described above.

[0016] In exemplary embodiments, as shown, the high-pressure cleaning system 100 may further include one or more nozzle attachments 200, which may be removably couplable to a nozzle 300. The nozzle 300 may be removably couplable to the outlet end 116 of the wand 112. In addition to other advantages set forth below in more detail, the nozzle attachments 200 allow the high-pressure cleaning system 100 to meet the exception to the requirement set forth in Section 55.3 of UL Standard 1776 by being compliant with the Injection Test set forth in Section 55A of UL Standard 1776, thereby enabling the use of a shorter wand. For example, the nozzle attachments 200 may each include a dome body 202 that enables a user to press the nozzle attachment 200 directly against a surface (e.g., a car body panel or other surface) to clean the surface without causing damage to the surface. The nozzle also helps prevent injection of the fluid through a person's skin should the nozzle inadvertently contact a person's (e.g., user's) skin.

[0017] In some embodiments, the high-pressure cleaning system 100 may further include a foam sprayer 120 and one or more additional hoses 122. The foam sprayer 120 may be couplable to the outlet hose 104, the handle 106, and / or to the wand 112 in various embodiments. The foam sprayer 120 may include a tank for storing detergent and one or more nozzles for ejecting the detergent as a foam spray. The one or more additional hoses 122 may be used as an inlet hose (e.g., for fluidly coupling the high pressure cleaner 102 to a fluid supply) or may be used as an extension hose couplable to the outlet hose 104.

[0018] Referring now to FIGS. 2 through 9, various views of a nozzle attachment 200 are illustrated in accordance with embodiments of the present disclosure. The nozzle attachment 200 may be utilized with a high-pressure cleaning system (such as the high-pressure cleaning system 100 described above with reference to FIG. 1). Particularly, FIG. 2 illustrates a perspective view of the nozzle attachment 200; FIG. 3 illustrates a first perspective and exploded view of the nozzle attachment 200; FIG. 4 illustrates a second perspective and exploded view of the nozzle attachment 200; FIG. 5 illustrates a first side view of the nozzle attachment 200; FIG. 6 illustrates a second side view of the nozzle attachment 200; FIG. 7 illustrates a bottom view of the nozzle 200; FIG. 8 illustrates a cross-sectional view of the nozzle attachment 200 from along the line 8-8 shown in FIG. 6; and FIG. 9 illustrates a cross-sectional view of the nozzle attachment 200 from along the line 9-9 shown in FIG. 5.

[0019] As shown, the nozzle attachment 200 may define an axial centerline 201 and a cylindrical coordinate system relative to the axial centerline 201. The cylindrical coordinate system may include an axial direction A defined along the axial centerline 201, a radial direction R perpendicular to the axial direction A, and a circumferential direction C extending around the axial direction A.

[0020] As shown, the nozzle attachment 200 may be couplable to a nozzle 300. For example, in exemplary embodiments, the nozzle attachment 200 is fixedly coupled to the nozzle 300 such that the nozzle attachment 200 does not move or rotate relative to the nozzle 300. The nozzle attachment 200 may include a dome body 202 that extends (e.g., axially) from a base 204 to a terminal edge 206. The dome body 202 may define an interior 208 that extends (e.g., axially) to an opening 205 at the terminal edge 206. The nozzle attachment 200 may further include an overmold 210 that at least partially surrounds (e.g., entirely surrounds in some embodiments) the dome body 202. More particularly, in some embodiments, the overmold 210 may entirely surround an exterior surface of the dome body 202. The overmold 210 may extend (e.g., axially) beyond the terminal edge 206 of the dome body 202 to a contact edge 214.

[0021] As shown in FIGS. 3, 8, and 9, the dome body 202 of the nozzle attachment 200 may define a channel 220. As shown in FIGS. 8 and 9, the channel 220 may extend generally axially along the axial centerline 201 from the base 204 to an inner surface 222. The inner surface 222 may partially define the interior 208. Particularly, the inner surface 222 may define the axially innermost portion of the interior 208, and the inner surface 222 may extend generally radially (e.g., perpendicular to the axial direction A).

[0022] The nozzle attachment 200 may be couplable to the nozzle 300 via an interference fit or a friction fit. For example, the nozzle 300 may be inserted or pressed into the channel 220 and may remain coupled to the dome body 202 via an interference fit. An interference fit (otherwise known as a press fit or friction fit), is a fit between two parts in which the external dimension of one part slightly exceeds the internal dimension of the part into which it has to fit. In many embodiments, the nozzle attachment 200 may be fixedly coupled to the nozzle 300, such that relative movement between the nozzle attachment 200 and the nozzle 300 is prevented. This advantageously ensures that the nozzle outlet is properly aligned with the dome body 202, such that the plane of fluid spray does not contact the dome body 202. For example, in the present case, the dimensions of the external surface of the nozzle 300 may slightly exceed the internal dimension of the channel 220. Additionally, in various embodiments, the nozzle 300 may further include one or more protrusions 302 extending radially outwardly from the nozzle 300. The one or more protrusions 302 may extend within the channel 220 and contact the dome body 202 to form the interference fit therewith. The one or more protrusions 302 may be annular, such that they each extend entirely about the nozzle 300. In various embodiments, the dome body 202 may further include a shoulder portion 224 extending radially into the channel 220. The shoulder portion 224 may define an annular lip 227 that contacts at least one of the protrusions 302. This advantageously ensures that an outlet 304 of the nozzle 300 is flush with the inner surface 222 of the dome body 202 after the nozzle 300 is inserted into the channel 220.

[0023] In exemplary embodiments, the dome body 202 may be formed from a first material, and the overmold 210 may be formed from a second material. The second material may be different than the first material. Particularly, the dome body 202 may be formed from a rigid material, which advantageously provides for structural integrity to the nozzle attachment. For example, the dome body 202 may be formed from a nylon material, such as a glass-filled nylon.

[0024] The overmold 210 may be formed from a compliant (or non-rigid material), such as an elastomeric material in exemplary embodiments. For example, the overmold 210 may be formed from a thermoplastic elastomer (TPE) and / or a thermoplastic polyurethane (TPU). TPE and TPU may be particularly advantageous due to the gas and oil resistance of these materials. Additionally, forming the overmold 210 from a compliant material, such as an elastomeric material, advantageously allows for the contact edge 214 to contact a cleaning surface (such as a painted cleaning surface) without causing damage thereto (e.g., chipped paint or other damage that could otherwise occur if the overmold were rigid).

[0025] In many embodiments, the dome body 202 may further include end wall portions 228 and side wall portions 230. The end wall portions 228 may be spaced apart from one another and may extend between the side wall portions 230. Similarly, the side wall portions 230 may be spaced apart from one another and may extend between the end wall portions 228. As shown in FIGS. 8 and 9, the end wall portions 228, the side wall portions 230, and the inner surface 222 may collectively define the interior 208.

[0026] Similarly, in such embodiments, the overmold 210 may include end portions 238 and side portions 240. The end portions 238 may extend between the side portions 240. In many embodiments, the end portions 238 of the overmold 210 may couple to and extend on the end wall portions 228 of the dome body 202. Likewise, the side portions 240 of the overmold 210 may couple to and extend on the side wall portions 230 of the dome body 202. In this way, the side portions 240 and the end portions 238 may collectively surround the dome body 202.

[0027] In certain embodiments, as shown in FIGS. 2 through 4, the dome body 202 may include a lip 242 to which the overmold 210 extends. The lip 242 may protrude from the dome body 202. The overmold 210 does not extend (e.g., axially) beyond the lip 242 as shown in FIG. 2. The lip 242 may be annular. For example, the lip 242 may extend along the side wall portions 230 and the end wall portions 228 continuously. On the side wall portions 230, the lip 242 may be positioned closer to the terminal edge 206 than the base 204. By contrast, on the end wall portions 228, the lip 242 may be positioned closer to the base 204 than the terminal edge 206 of the dome body 202. The lip 242 may advantageously prevent the overmold 210 from slipping upwards relative to the dome body 202. Additionally, the lip 242 may provide additional leverage when a user is gripping the dome body 202.

[0028] As shown in FIGS. 8 and 9, the side wall portions 230 may have a larger width than the end wall portions 228. For example, as shown in FIG. 8, the side wall portions 230 may define a first width 232 between the end wall portions 228 (e.g., between a first end wall portion and a second end wall portion). Additionally, as shown in FIG. 9, the end wall portions 228 may define a second width 234 between the side wall portions 230 (e.g., between a first side wall portion and a second side wall portion). The first width 232 may be larger than the second width 234 (such as about 200% longer, or such as about 150% longer, or such as about 100% longer, or such as about 75% longer, or such as about 50% longer, or more or less).

[0029] Additionally, as shown in FIG. 8, the end wall portions 228 may diverge away from one another as the end wall portions 228 extend towards the terminal edge 206. More particularly, the end wall portions 228 may diverge away from one another (and away from the axial centerline 201) as the end wall portions 228 extend from the inner surface 222 to the terminal edge 206. Similarly, as shown in FIG. 9, the side wall portions 230 may diverge away from one another as the side wall portions 230 extend towards the terminal edge 206. More particularly, the side wall portions 230 may diverge away from one another (and away from the axial centerline 201) as the side wall portions 230 extend from the inner surface 222 to the terminal edge 226.

[0030] In this way, both the first width 232 and the second width 234 may increase (e.g., gradually and / or continually increase) as the dome body 202 extends from the inner surface 222 to the terminal edge 206. In other words, an axial-radial cross-sectional area (i.e., a cross-sectional area taken in an axial-radial plane, such as the plane shown in FIG. 7) of the interior 208 may increase (e.g., continually increase) as the dome body 202 extends towards the terminal edge 206. This may advantageously allow for the fan spray 306 to spread out for maximum coverage at the cleaning surface.

[0031] In many implementations, the nozzle 300 may define an outlet 304 that is configured to form a fan spray 306 of fluid. The outlet 304 may be oriented such that the fan spray 306 may aligns with the largest width of the dome body 202, in order to prevent the fan spray 306 from contacting the dome body 202 prior to reaching the outlet of the dome body 202. As shown FIG. 8, the nozzle 300 may be oriented relative to the nozzle attachment 200 such that the fan spray 306 spreads (or fans) the most in the direction of the first width 232 (which is the largest dimension of the interior 208). This advantageously allows the fan spray 306 to fully spread (or fan out) within the interior 208 without being impeded by the dome body 202.

[0032] In exemplary implementations, the nozzle attachment 200 may be utilized with a high-pressure cleaning system (such as the high-pressure cleaning system 100 described above with reference to FIG. 1) having a "short" or "stubby" wand or lance to allow for use of the high-pressure cleaning system without causing a safety risk or causing a risk of damaging the cleaning surface. Particularly, the nozzle attachment 200 may enable the use of a wand or lance that is less than 29.5 inches without causing a safety risk or causing a risk of damaging the cleaning surface (e.g., chipping paint, etc.).

[0033] Additionally, as shown in FIG. 8, the nozzle attachment 200 may further define a length 236 (e.g., an axial length) between the inner surface 222 and the contact edge 214. This distance allows for the fan spray 306 to reduce velocity slightly while maintaining an ideal force at the contact surface. The length 236 may be dependent at least partially on a pressure of the fluid at the outlet 304. For example, in exemplary embodiments, the length 236 may be between about 30 millimeters (mm) and about 50 mm when an outlet pressure of fluid at the nozzle is between about 1000 pounds per square inch (psi) and about 1400 psi. More specifically, in some embodiments, the length 236 may be between about 35 mm and about 45 mm when an outlet pressure of fluid at the nozzle is between about 1100 psi and about 1300 psi. In other embodiments, the length 236 may be between about 37.5 mm and about 42.5 mm when an outlet pressure of fluid at the nozzle is between about 1150 psi and about 1250 psi.

[0034] In many embodiments, as shown in FIG. 5, the overmold 210 may include a recessed edge 244. As shown by the dashed line in FIG. 5, the nozzle attachment 200 may be configured to engage a cleaning surface 245 (or plane of contact) at the contact edge 214. The recessed edge 244 may be spaced apart from the cleaning surface 245 when the nozzle attachment 200 is engaged therewith, thereby providing an outlet for used fluid to exit the interior 208. The recessed edge 244 may be spaced apart (e.g., axially) from the contact edge 214 such that a gap 246 is defined between the contact edge 214 and the recessed edge 244. Additionally, in many embodiments, the overmold 210 may include tapering edges 248 that extend between the contact edge 214 and the recessed edge 244. In various embodiments, as shown, both the recessed edge 244 and the tapering edges 248 may be defined by the side portion(s) 240 of the overmold 210. In many embodiments, the overmold 210 may include a pair of recessed edges 244 each defined in a respective side wall portion 240 of the overmold 210.

[0035] Referring back to FIGS. 3 and 4, in some embodiments, the dome body 202 may further define a plurality of dovetails 250 at the terminal edge 206. Each dovetail 250 of the plurality of dovetails 250 may be a recess in the dome body 202 at the terminal edge 206. The plurality of dovetails 250 may be spaced apart from one another (e.g., equally or unequally spaced apart). Additionally, as shown in FIG. 4, the overmold 210 may include a plurality of protrusions 252, which correspond in size and shape to the plurality of dovetails 250. The plurality of protrusions 252 may each extend into a respective dovetail of the plurality of dovetails 250. This increases the connection strength between the dome body 202 and the overmold 210.

[0036] Referring now to FIG. 7, in various embodiments, the dome body 202 may further include one or more radial supports 254. Each radial support may extend from the inner surface 222 to one of the side walls 230 or to one of the end walls 228. The radial supports 254 may advantageously increase the structural integrity of the dome body 202 while minimizing material usage, thereby reducing costs.

[0037] The nozzle attachment 200 described hereinabove provides several advantages compared to prior designs. For example, the dome body 202 and overmold 210 helps prevent direct contact between the outlet of the nozzle and a cleaning surface. This provides safety to a user and helps prevent damage to the surface. The overmold 210 being formed from an elastomeric material (such as a TPE or TPU) further helps prevent damage to a surface, such as a user or a car. The distance between the outlet of the nozzle and the end of the dome body may allow a user to place the nozzle attachment 200 against a surface, such as a car, to provide maximum cleaning, without damaging (e.g., scratching) the surface. The recessed edges 244 permit fluid to be ejected from the nozzle when the nozzle is placed against a surface.

[0038] This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.

[0039] These and further aspects and details of the invention are summarized by the subject matter of the following numbered clauses: 1. A nozzle attachment for coupling to a nozzle, the nozzle attachment comprising: a dome body extending from a base to a terminal edge, the dome body defining an interior that extends to an opening at the terminal edge; and an overmold at least partially surrounding the dome body, the overmold extending beyond the terminal edge of the dome body to a contact edge. 2. The nozzle attachment as in clause 1, wherein the dome body defines an opening at the base for coupling to a nozzle. 3. The nozzle attachment as in any preceding clause, wherein the overmold includes a recessed edge spaced apart from the contact edge. 4. The nozzle attachment as in any preceding clause, wherein the dome body comprises a first material, wherein the overmold comprises a second material, and wherein the first material is different than the second material. 5. The nozzle attachment as in any preceding clause, wherein the overmold comprises an elastomeric material. 6. The nozzle attachment as in any preceding clause, wherein the dome body further includes an inner surface that partially defines the interior, and wherein a length between the inner surface of the dome body and the contact edge of the overmold is between about 30 millimeters (mm) and about 50 mm when an outlet pressure of fluid at the nozzle is between about 1000 pounds per square inch (psi) and about 1400 psi. 7. The nozzle attachment as in any preceding clause, wherein the nozzle attachment defines an axial direction, a radial direction, and a circumferential direction, and wherein an axial-radial cross-sectional area of the interior increases as the dome body extends towards the terminal edge. 8. The nozzle attachment as in any preceding clause, wherein the dome body includes end wall portions and side wall portions, the side wall portions having a larger width than the end wall portions, the end wall portions being spaced apart from one another and extending between the side wall portions. 9. The nozzle attachment as in any preceding clause, wherein the side wall portions diverge away from one another as the side wall portions extend towards the terminal edge, and wherein the end wall portions diverge away from one another as the end wall portions extend towards the terminal edge. 10. The nozzle attachment as in any preceding clause, wherein the dome body further defines a plurality of dovetails at the terminal edge. 11. A high-pressure cleaning system comprising: a wand; and a nozzle having an outlet; a nozzle attachment according to any of the preceding clauses coupled the nozzle. 12. A high-pressure cleaning system comprising: a wand; and a nozzle having an outlet; a nozzle attachment coupled the nozzle, the nozzle attachment comprising: a dome body surrounding the outlet of the nozzle, the dome body extending from a base to a terminal edge, the dome body defining an interior that extends to an opening at the terminal edge; and an overmold at least partially surrounding the dome body, the overmold extending beyond the terminal edge of the dome body to a contact edge. 13. The high-pressure cleaning system as in any preceding clause, wherein the wand defines a total length that is less than 29.5 inches. 14. The high-pressure cleaning system as in any preceding clause, wherein the wand defines a total length that is between about 6 inches and about 12 inches. 15. The high-pressure cleaning system as in any preceding clause, wherein the dome body defines a channel at the base for coupling to a nozzle. 16. The high-pressure cleaning system as in any preceding clause, wherein the overmold includes a recessed edge spaced apart from the contact edge. 17. The high-pressure cleaning system as in any preceding clause, wherein the dome body comprises a first material, wherein the overmold comprises a second material, and wherein the first material is different than the second material. 18. The high-pressure cleaning system as in any preceding clause, wherein the overmold comprises an elastomeric material. 19. The high-pressure cleaning system as in any preceding clause, wherein the dome body further includes an inner surface that partially defines the interior, and wherein a length between the inner surface of the dome body and the contact edge of the overmold is between about 30 millimeters (mm) and about 50 mm when an outlet pressure of fluid at the nozzle is between about 1000 pounds per square inch (psi) and about 1400 psi. 20. The high-pressure cleaning system as in any preceding clause, wherein the nozzle attachment defines an axial direction, a radial direction, and a circumferential direction, and wherein an axial-radial cross-sectional area of the interior increases as the dome body extends towards the terminal edge. 21. The high-pressure cleaning system as in any preceding clause, wherein the dome body includes end wall portions and side wall portions, the side wall portions having a larger width than the end wall portions, the end wall portions being spaced apart from one another and extending between the side wall portions. 22. The high-pressure cleaning system as in any preceding clause, wherein the side wall portions diverge away from one another as the side wall portions extend towards the terminal edge, and wherein the end wall portions diverge away from one another as the end wall portions extend towards the terminal edge. 23. The high-pressure cleaning system as in any preceding clause, wherein the dome body further defines a plurality of dovetails at the terminal edge. 24. The high-pressure cleaning system as in any preceding clause, wherein the nozzle is configured to form a fan spray of fluid, wherein the nozzle is oriented relative to the nozzle attachment such that the fan spray spreads the most in the direction of a largest width of the dome body.

Examples

Embodiment Construction

[0006]Reference now will be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the drawings. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Moreover, each example is provided by way of explanation, rather than limitation of, the technology. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present technology without departing from the scope or spirit of the claimed technology. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present disclosure covers such modifications and variations as come within the scope of the appended claims and their equivalents. The...

Claims

1. A nozzle (200, 300) attachment for coupling to a nozzle (200, 300), the nozzle (200, 300) attachment comprising: a dome body (202) extending from a base (204) to a terminal edge (206, 226), the dome body (202) defining an interior (208) that extends to an opening (205) at the terminal edge (206, 226); and an overmold (210) at least partially surrounding the dome body (202), the overmold (210) extending beyond the terminal edge (206, 226) of the dome body (202) to a contact edge (214).

2. The nozzle (200, 300) attachment as in claim 1, wherein the dome body (202) defines an opening (205) at the base (204) for coupling to a nozzle (200, 300).

3. The nozzle (200, 300) attachment as in claim 1 or 2, wherein the overmold (210) includes a recessed edge (244) spaced apart from the contact edge (214).

4. The nozzle (200, 300) attachment as in any of claims 1 to 3, wherein the dome body (202) comprises a first material, wherein the overmold (210) comprises a second material, and wherein the first material is different than the second material.

5. The nozzle (200, 300) attachment as in any of claims 1 to 4, wherein the overmold (210) comprises an elastomeric material.

6. The nozzle (200, 300) attachment as in any of claims 1 to 5, wherein the dome body (202) further includes an inner surface (222) that partially defines the interior (208), and wherein a length (236) between the inner surface (222) of the dome body (202) and the contact edge (214) of the overmold (210) is preferably between about 30 millimeters (mm) and about 50 mm when an outlet (110, 304) pressure of fluid at the nozzle (200, 300) is between about 1000 pounds per square inch (psi) and about 1400 psi.

7. The nozzle (200, 300) attachment as in any of claims 1 to 6, wherein the nozzle (200, 300) attachment defines an axial direction, a radial direction, and a circumferential direction, and wherein an axial-radial cross-sectional area of the interior (208) increases as the dome body (202) extends towards the terminal edge (206, 226).

8. The nozzle (200, 300) attachment as in any of claims 1 to 7, wherein the dome body (202) includes end wall portions (228) and side wall portions (230), the side wall portions (230) having a larger width than the end wall portions (228), the end wall portions (228) being spaced apart from one another and extending between the side wall portions (230).

9. The nozzle (200, 300) attachment as in claim 8, wherein the side wall portions (230) diverge away from one another as the side wall portions (230) extend towards the terminal edge (206, 226), and wherein the end wall portions (228) diverge away from one another as the end wall portions (228) extend towards the terminal edge (206, 226).

10. A high-pressure cleaning system (100) comprising: a wand (112); and a nozzle (200, 300) having an outlet (110, 304); a nozzle (200, 300) attachment coupled the nozzle (200, 300), the nozzle (200, 300) attachment comprising: a dome body (202) surrounding the outlet (110, 304) of the nozzle (200, 300), the dome body (202) extending from a base (204) to a terminal edge (206, 226), the dome body (202) defining an interior (208) that extends to an opening (205) at the terminal edge (206, 226); and an overmold (210) at least partially surrounding the dome body (202), the overmold (210) extending beyond the terminal edge (206, 226) of the dome body (202) to a contact edge (214).

11. The high-pressure cleaning system (100) as in claim 10, wherein the wand (112) defines a total length (118) that is less than 29.5 inches.

12. The high-pressure cleaning system (100) as in claim 10 or 11, wherein the wand (112) defines a total length (118) that is between about 6 inches and about 12 inches.

13. The high-pressure cleaning system (100) as in any of claims 10 to 12, wherein the dome body (202) defines a channel (220) at the base (204) for coupling to a nozzle (200, 300).

14. The high-pressure cleaning system (100) as in any of claims 10 to 13, wherein the overmold (210) includes a recessed edge (244) spaced apart from the contact edge (214).

15. The high-pressure cleaning system (100) as in any of claims 10 to 14, wherein the dome body (202) comprises a first material, wherein the overmold (210) comprises a second material, and wherein the first material is different than the second material.

Images