Container and cap assembly for pressure washer
A container for use with a pressure washer spray lance includes a hollow member having an opening for housing a chemical and a cap assembly. The cap assembly for the container includes an inner member and an outer member and is configured to allow the use of the container in an inverted or upright position.
The claimed invention relates to a pressure washer that is configured to spray soap at both a high and a low pressure. The pressure washer includes a spray lance and an injector and a chemical tank is attached to the spray lance. The tank is operable in both an upright and an inverted position. The injector includes a metallic nozzle and a plastic aspirator.
BACKGROUND OF THE INVENTIONA pressure washer is a device that includes a pump, a hose, and a spray lance having an injector. A fluid source, such as water, is connected to the pump and fluid is pumped through the hose and out the injector for application to a surface. It is often desirable in pressure washer applications to utilize a chemical, such as detergent, to clean a surface. Surfaces that are typically treated with a pressure washer may be at ground level or higher. It is not uncommon for a pressure washer to be used to spray a multi-story building, such as a three story house, or a single level structure, such as a deck or porch.
Typical pressure washers spray soap at either a low pressure or a high pressure. A user will typically use low pressure spray to reach easy to reach areas and high pressure spray to reach hard to reach areas, such as the second story of a home or office building. With existing low pressure soap sprayers, soap can be applied to the first story of a house, but not to higher stories. In order to reach higher stories, it is necessary to use a ladder in conjunction with the spray lance, while the pump and soap container remains on the ground. With existing high pressure soap sprayers, soap can be applied to the upper stories of a house, but not at lower stories because the high pressure of the sprayer may result in damage to the facade of the house. High pressure applicators can be used on lower stories only if the user backs a far enough distance away from the structure, in order to avoid damaging the facade.
Pressure washers and other sprayers utilize a venturi effect to suction a chemical into a flow stream. Venturis are well known for introducing a second fluid into a first fluid. The second fluid is introduced through an aspirator inlet that is typically aligned with a narrowed portion of the venturi, or positioned downstream of the venturi. In operation, the second fluid to be introduced is sucked into the venturi through the aspirator inlet as fluid flows through the venturi tube. For a given venturi tube, the aspiration rate depends on the flow rate of the fluid which passes through the venturi inlet and the viscosity of the fluids.
SUMMARYAccording to one embodiment of the invention, a container for coupling to a spray lance includes a hollow member having at least one opening and at least one attachment mechanism for attaching the hollow member to a spray lance of a pressure washer. The hollow member is configured to house a chemical.
In another embodiment, a container for coupling to a spray lance includes a hollow member and a cap assembly. The hollow member has at least one opening and at least one attachment mechanism for attaching the hollow member to a spray lance. The hollow member is configured to house a chemical. The cap assembly has an inner cap member with a first and a second opening and an outer cap member with a third opening. The outer cap member is movable relative to the inner cap member such that the third opening aligns with the first opening when the cap is in a first operative position, the third opening aligns with the second opening when the cap is in a second operative position, and the third opening aligns with neither the first nor the second opening when the cap is in a third inoperative position.
In yet another embodiment, a cap assembly for a container that is usable in both an upright and an inverted position is provided. The cap assembly includes an inner cap member and an outer cap member. The inner cap member has a first and a second opening. The outer cap member has a third opening and is positioned adjacent the inner cap member. The outer cap member is rotatable relative to the inner cap member into at least three operative positions, such that the third opening aligns with the first opening when the cap is in a first operative position, the third opening aligns with the second opening when the cap is in a second operative position, and the third opening aligns with neither the first nor the second opening when the cap is in a third inoperative position.
BRIEF DESCRIPTION OF THE DRAWING FIGURES
The pressure washer 10 is configured to spray a fluid out of the injector 28 at a pressure range that ranges from a low pressure to a high pressure. In a preferred embodiment, the pressure washer 10 is configured to spray at a low pressure range of about 25 to about 200 psi and at a high pressure range of about 500 to about 3200 psi.
A first chemical tank 34 is positioned on the cart 20 and includes a conduit or tube 36, shown best in
The pump 12 includes a venturi (not shown) that is positioned in the fluid line in alignment with the first chemical inlet 38. Venturis are well known in the art for introducing a second fluid into a first fluid. The venturi is utilized to create a vacuum in the vicinity of the venturi and this vacuum serves to suction the first chemical from the first chemical tank 34 into the fluid. Venturis typically have an aspiration rate that is dependent upon the flow rate of the fluid that flows through the venturi tube. The pump venturi is designed to suction a first chemical when the pump 12 is operating in the low pressure spray range, described above. Thus, the pump 12 is configured to pump either a fluid from the fluid source, or a combination of the fluid from the fluid source combined with a first chemical from the first chemical tank 34.
A valve may be positioned between the first chemical tank 34 and the first chemical inlet 38 for opening and closing the flow of the first chemical from the tank. Thus, in order to allow the first chemical to flow, the operator must open the valve between the first chemical tank 34 and the first chemical inlet 38.
The pressure washer 10 also utilizes a second chemical tank 44, shown in
The second chemical tank 44 is preferably an elongated, tube-shaped, hollow container 46 that has an opening 48 at one end. The opening 48 is closed by a cap assembly 50, which will be described in greater detail below. The second chemical tank 44 is provided in order to introduce a second chemical into the fluid as the fluid travels through the injector 28. When the second chemical is introduced into the fluid, the fluid combined with the second chemical is sprayed through the exit 52 of the injector 28.
As shown in
The container 46 may have any desired length. As shown in
The container 46 may include advertising indicia 58, if so desired. In addition, operating instructions 60 may be positioned on the tank for assisting the operator in using the container 46 or the cap assembly 50.
In one embodiment, the pressure washer 10 has three operative modes. The first mode includes low pressure spray of fluid combined with the first chemical. The second mode include high pressure spray of fluid without chemical and the third mode includes high pressure spray of the fluid combined with the second chemical. In a second embodiment, the pressure washer has four operative modes that include the first, second and third modes and an additional fourth mode. The fourth mode includes low pressure spray of the fluid without the first chemical.
The injector 28 and spray lance 26 are shown in
As shown in
The injector body 74 includes an internal passageway 76 in which the nozzle 70 seats and fluid flows. The venturi 82 is defined in the internal passageway 76. In addition, the injector body 74 may include spray arms 78. The spray arms may be formed integral with the injector body, or may be formed as separate flow directing members. A spray deflecting member 79 may be seated inside the spray arms 78 and extends longitudinally toward the injector outlet 52. When the cover 72 is rotated, the spray arms 78 or spray deflecting members 79 move against surfaces defined on the interior of the cover 72 in order to deflect the spray deflecting member 79 to provide the desired spray pattern from the injector 28.
As shown in
The injector 28 preferably includes a combination of metallic and non-metallic materials designed to deter corrosion of the metallic parts. The nozzle body 71, nozzle tip 73, and collar 88 are preferably made of a metallic material, such as brass, while the remainder of the injector 28 is preferably made of a non-corrosive material, such as thermoplastic. A preferred type of material is polypropylene. Because chemicals are often corrosive in nature, it is desirable to avoid bombarding the nozzle body 71 and nozzle tip 73 with a chemical during high pressure spray. For this reason, during high pressure spray, fluid alone travels from the pump 12 through the nozzle 70 because the first chemical will not be introduced into the flow stream since the venturi at the pump is designed for low pressure spray. In the high pressure spray mode, the second chemical is introduced downstream of any metallic parts, e.g., downstream from the nozzle 70 and the collar 88. In contrast, the first chemical combined with the fluid may travel through and around the nozzle 70 when in the low pressure mode since the metallic parts are designed to withstand a combination of fluid and chemicals at lower pressures. By utilizing a combination of metallic and plastic parts, and introducing the chemicals at different positions in the flow path depending on the pressure of the spray, the present invention assists in deterring the degradation of the nozzle 70 and provides substantially greater nozzle life with the added flexibility of being able to introduce chemicals to the flow stream at both high and low pressures of spray. Other types of metallic materials may be used for the nozzle 70 and collar 88. Alternate types of plastic materials may also be used for the cover 72 and body 74. Advances in the art may provide opportunities to utilize plastic materials for the nozzle 70 and collar 88.
The outer cap member 96 is movable relative to the inner cap member 94 in order to provide the cap assembly 50 with a number of operative positions. A first operative position is for use in the inverted position, e.g., when the injector 28 is pointed downward. A second operative position is for use in the upright position, e.g., when the injector 28 is pointed upwardly. A third position is an inoperative position, where the cap assembly 50 is closed so that no chemical can flow through the cap assembly 50 from the tank 44.
The inner cap member 94 includes an attachment mechanism 98, shown in
The outer cap member 96 is rotatably positioned on the inner cap member 94 and is retained on the inner cap member 94 by a screw 106, which is shown positioned near the center of the cap assembly 50 in
The inner cap member 94, as shown in
O-ring seals 118 are preferably positioned around each of the first and second openings 110, 112 and serve to provide a seal between the inner and outer cap members 94, 96. The O-rings 118 may be positioned in recesses 120 defined on the outer surface of the inner cap member 94, as shown in
The outer cap member 96, as shown in
The first, second, and third openings 110, 112, 122 are positioned so that when the outer cap member 96 is rotated relative to the inner cap member 94, the third opening 122 may align with the first opening 110 or the second opening 112 of the inner cap member 94. The first opening 110 aligns with the third opening 122 for inverted usage. The second opening 112 aligns with the third opening 122 for upright usage. The third opening 122 aligns with neither the first nor the second opening 110, 112 in the closed position.
The container 46 may include indicia 60 in the form of instructions to the user. For instance, the indicia 60 may align with the rotational positions of the outer cap member 96 to indicate “off”, “inverted”, or “upright” operation.
The outer cap member 96 is rotatable through a desired angular range in order to move between the three positions. For example,
The outer cap member 96 utilizes a detent system for informing the user that the proper position has been located for the angular rotation of the cap. The outer cap member 96 has a projection 128 for mating with recesses positioned on the inner cap member 94. The projection 128 aligns with a first recess 130 when the third opening 122 is aligned with the first opening 110 and with a second recess 132 when the third opening 122 is aligned with the second opening 112. The projection 128 aligns with a third recess 136 when the third opening 122 is not aligned with the first or second openings 110, 112 and is in a closed position. The combination of the projection 128 and recesses 130, 132, 136 provides a tactile message to the user when the third opening 122 is properly aligned with either the first or second openings 110, 112, or is in a closed position. As shown in
The inner cap member 94 also includes leveling bumps 138, which extend outwardly from the surface of the inner cap member 94 to abut the outer cap member 96. The leveling bumps 138 are positioned opposite the O-rings 118 around the first and second openings 110, 112. The leveling bumps are used to counteract the O-ring seals 118, which extend above the upper surface of the inner cap member 94 and are used to level the inner and outer cap members 94, 96 relative to one another. While the recesses 130, 132, 136 and leveling bumps 138 are shown positioned on the inner cap member 94 and the projection 128 is shown positioned on the outer cap member 96, they could be oppositely arranged, if so desired.
The inner and outer cap members 94, 96 are preferably made of a non-corrosive material, such as a thermoplastic. One type of thermoplastic that may be utilized is polypropylene.
It should be noted that while the first chemical tank is shown positioned on the cart next to the pump, the first chemical tank inlet can be positioned at any point in the flow path prior to the nozzle, as long as a venturi is positioned adjacent the first chemical inlet in the flow path. For instance, the first chemical inlet could be positioned on the spray wand upstream from the nozzle. The first chemical inlet could be positioned in the injector prior to the nozzle. The second chemical tank could be utilized for supplying a chemical at the first chemical inlet, as well as at the second chemical inlet. Appropriate valving would be necessary in order to distribute the chemical at either the first or the second chemical inlet in the low or high pressure spray mode. Thus, in this embodiment, which is not shown, a single chemical tank would be necessary to provide the three or four modes of operation of the pressure washer, as discussed above.
While various features of the claimed invention are presented above, it should be understood that the features may be used singly or in any combination thereof. Therefore, the claimed invention is not to be limited to only the specific embodiments depicted herein.
Further, it should be understood that variations and modifications may occur to those skilled in the art to which the claimed invention pertains. The embodiments described herein are exemplary of the claimed invention. The disclosure may enable those skilled in the art to make and use embodiments having alternative elements that likewise correspond to the elements of the invention recited in the claims. The intended scope of the invention may thus include other embodiments that do not differ or that insubstantially differ from the literal language of the claims. The scope of the present invention is accordingly defined as set forth in the appended claims.
Claims
1. A container for coupling to a spray lance of a pressure washer comprising:
- a hollow member having at least one opening and at least one attachment mechanism for attaching the hollow member to a spray lance, said hollow member being configured to house a chemical.
2. The container of claim 1, wherein the attachment mechanism comprises three clips aligned on a side of the hollow member, said clips being configured to attach the hollow member to a spray lance.
3. The container of claim 2, wherein the three clips each have a cross-section and comprise two end clips and a middle clip, with the end clips having a first cross-section and the middle clip having a second cross-section.
4. The container of claim 2, wherein the hollow member has an elongated, tube-like shape that is closed at one end and has an opening at the other end.
5. The container of claim 2, further comprising a cap coupled to the at least one opening for assisting in retaining a chemical in the hollow member.
6. The container of claim 5, wherein the cap includes at least one opening and has three operative positions, a first operative position opening the at least one opening for inverted use of the container, a second operative position opening the at least one opening for upright use of the container, and a third operative position closing the at least one opening.
7. The container of claim 1, wherein the hollow member has a length that is equal to or less than a length of a spray lance of a pressure washer.
8. The container of claim 1, wherein the at least one attachment mechanism is configured to position the hollow member parallel to a spray lance of a pressure washer.
9. A container for coupling to a spray lance comprising:
- a hollow member having at least one opening and at least one attachment mechanism for attaching the hollow member to a spray lance, said hollow member being configured to house a chemical; and
- a cap assembly having an inner cap member with a first and a second opening and an outer cap member with a third opening, wherein the outer cap member is movable relative to the inner cap member such that the third opening aligns with the first opening when the cap is in a first operative position, the third opening aligns with the second opening when the cap is in a second operative position, and the third opening aligns with neither the first nor the second opening when the cap is in a third inoperative position.
10. The container of claim 9, further comprising a locking assembly for locking the cap assembly to the hollow member opening, said locking assembly comprising a projection extending from the inner cap member and a catch positioned on the container, said projection configured to engage the catch in a removably locking manner.
11. A cap assembly for a container that is usable in both an upright and an inverted position, the cap assembly comprising:
- an inner cap member having a first and a second opening; and
- an outer cap member having a third opening and being coupled adjacent to the inner cap member, said outer cap member being rotatable relative to the inner cap member into at least three operative positions, such that the third opening aligns with the first opening when the cap is in a first operative position, the third opening aligns with the second opening when the cap is in a second operative position, and the third opening aligns with neither the first nor the second opening when the cap is in a third inoperative position.
12. The cap assembly of claim 11, wherein the inner cap member includes an attachment mechanism for attaching the cap assembly to an opening of a container in a non-leaking manner.
13. The cap assembly of claim 11, wherein the first operative position is for inverted usage of a container and the second operative position is for upright usage of a container.
14. The cap assembly of claim 13, further comprising a conduit coupled to the second opening and extending into the container for operation in the second operative position.
15. The cap assembly of claim 13, wherein an upstanding rim is positioned around the third opening, said upstanding rim being configured to accept a conduit through which a fluid can exit from the cap assembly.
16. The cap assembly of claim 11, further comprising a locking assembly for locking the cap assembly to a container.
17. The cap assembly of claim 16, wherein the locking assembly comprises a prong extending from a side wall of the inner cap member, the prong being configured to engage a catch positioned on a container.
18. The cap assembly of claim 11, wherein the inner cap member is plastic and the outer cap member is plastic.
19. The cap assembly of claim 11, wherein a seal is positioned in the vicinity of the first opening between the inner cap member and the outer cap member, and a seal is positioned in the vicinity of the second opening between the inner cap member and the outer cap member.
20. The cap assembly of claim 11, further comprising a detent system for informing a user when the outer cap member is positioned in one of the at least three operative positions.
21. The cap assembly of claim 20, wherein the detent system comprises a projection extending outwardly from the outer cap member and at least three recesses defined on the inner cap member, the projection being configured to engage the recesses one at a time upon the angular rotation of the outer cap member, with each recess representing one of the at least three operative positions.
22. The cap assembly of claim 11, wherein the outer cap member is rotatable through about a 90° angular range between the three operative positions.
Type: Application
Filed: Dec 31, 2003
Publication Date: Jul 21, 2005
Inventor: R. Ray (Gallatin, TN)
Application Number: 10/750,117