Patent Publication Number: US-2021170453-A1

Title: Self-contained pressure washer

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a Section 111(a) application relating to and claiming the benefit of commonly-owned, co-pending U.S. Provisional patent application No. 62/902,072, entitled “SELF-CONTAINED PRESSURE WASHER,” filed on Sep. 18, 2019, the contents of which are incorporated herein by reference in their entirety. 
    
    
     BACKGROUND 
     1. Field of the Invention 
     The present invention relates to a method, system, and/or apparatus pressure washing. More particularly, the present invention relates to a method, system, and/or apparatus for pressure washing using a self-contained fluid system. 
     2. Description of the Related Art 
     Pressure washing conventionally involves the use of a high-velocity and/or pressure flow of water against a surface in order to clean or otherwise remove substances (e.g., paint, dirt, etc.) from the surface. Any of a variety of surfaces can benefit from pressure washing, such as via the removal of paint or other particulates from concrete, removal of dirt or mud from fencing or other building surfaces, and removal of road grime, salt, or other elements from vehicle exteriors. Not only has conventional pressure washing made cleaning easier and most convenient than traditional washing of surfaces without the high pressure flow of fluid that has been used, pressure washing can also aid in conservation of fluid, such as water, by using a lower volume of water than would otherwise be used to clean surfaces. However, conventional pressure washing systems can pose some problems or inconveniences to consumers, either via expensive pricing, inconvenient transport or use, and/or inadequate time that such systems may be used before running out of power and/or fluid, forcing the user to wait until the system is ready for use again. An improved pressure washing method, system, and apparatus would address the above, and other problems, by providing a convenient, inexpensive, and efficient pressure washer. 
     SUMMARY 
     The present invention is related to a method, system, and apparatus for pressure washing. In one embodiment, a pressure washer may include a tank configured to contain a volume of water, the tank having an opening therein for provision of water into the tank, a first filter disposed within the opening for filtering of water being provided into the tank for providing a first level of filtration to water associated with the tank, a second filter for providing a second level of filtration to water associated with the tank, a pump for pressurizing at least a portion of the volume of water from the tank, and a spray device, in communication with the pump, for outputting the pressurized portion of the volume of water. 
     In another embodiment, a method for providing pressurized fluid may include providing a tank configured to contain a volume of water, the tank having an opening therein for provision of water into the tank, providing a first filter disposed within the opening for filtering of water being provided into the tank for providing a first level of filtration to water associated with the tank, providing a second filter for providing a second level of filtration to water associated with the tank, providing a pump for pressurizing at least a portion of the volume of water from the tank, providing a spray device, in communication with the pump, for outputting the pressurized portion of the volume of water, receiving water into the tank, filtering at least a portion of the water using the first filter and the second filter, pressurizing at least a portion of the water using the pump, and outputting the pressurized water using the spray device. 
     In some embodiments, a device includes a tank sized and shaped to contain a quantity of water, wherein the quantity of water is between 4 gallons and 12 gallons; a pump in fluid communication with the tank, wherein the pump is configured to extract water from the tank and to pressurize the water extracted from the tank to a pressure that is from 500 psi to 1500 psi, wherein the pump has an electrical current of between 8 A and 10 A and a power of between 960 W and 1200 W; a connector having a first end and a second end, wherein the first end of the connector is in fluid communication with the tank and is coupled to the tank so as to receive pressurized water produced by the tank and convey the pressurized water through the connector from the first end to the second end; and a plurality of lances configured to be interchangeably coupled to the second end of the connector so as to receive the pressurized water from the second end of the connector and to expel the water, wherein the plurality of lances includes a first lance that is a fog lance, wherein the fog lance has a fog nozzle, wherein the fog nozzle includes a fog nozzle lid having an aperture having a size that is from 0.35 mm to 0.45 mm, wherein the fog nozzle includes a fog piston configured to cause rotational movement of water passing therethrough, wherein the fog nozzle is configured to produce a fog nozzle flow rate that is less than 0.17 liters per minute, and wherein the fog nozzle is configured to produce a fog output that travels at least 1 meter from the fog nozzle. 
     In some embodiments, the tank is sufficiently sized such that the quantity of water is a sufficient quantity of water to allow for continuous use at the fog nozzle flow rate for a duration of at least three hours. 
     In some embodiments, the fog nozzle is configured to produce a fog output having an average droplet size of about 20 microns. 
     In some embodiments, the device also includes a battery. 
     In some embodiments, the device also includes a power cable configured to be coupled to an external power source. 
     In some embodiments, the device also includes one or more wheels configured to allow the device to be rolled. 
     In some embodiments, the device also includes a container, wherein the container is configured to hold a cleaning product, wherein the container is positioned in fluid communication with the tank and the connector between the tank and the first end of the connector, and wherein the container is configured such that the cleaning product mixes with water passing from the tank to the connector. In some embodiments, the cleaning product is a disinfectant. 
     In some embodiments, the pump and the fog nozzle cooperate to produce the fog output without a supply of pressurized air. 
     In some embodiments, the plurality of lances includes a second lance that is a pressure washing lance. In some embodiments, the pressure washing lance is configured to output water at a flow rate of about 5 liters per minute. In some embodiments, the pressure washing lance is configured to output water at a working pressure of about 800 psi. In some embodiments, the pressure washing lance includes a nozzle regulator that is operable by a user to adjust a spray pattern of water output by the pressure washing lance. 
     In some embodiments, the plurality of lances includes a second lance that is a misting lance. In some embodiments, the misting lance has a misting nozzle, wherein the misting nozzle includes a misting nozzle lid having an aperture having a size that is from 0.35 mm to 0.45 mm, wherein the misting nozzle is configured to produce a misting nozzle flow rate that is greater than 0.17 liters per minute, and wherein the misting nozzle is configured to produce a mist output that travels at least 1 meter from the misting nozzle. In some embodiments, the misting nozzle is configured to produce a misting nozzle flow rate that is about 450 milliliters per minute. In some embodiments, the misting nozzle is configured to produce a mist output having an average droplet size that is in a range of from 20 to 40 microns. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The features, objects, and advantages of the present invention will become more apparent from the detailed description set forth below when taken in conjunction with the drawings, wherein: 
         FIG. 1A  shows a front perspective view of a self-contained pressure washer, according to one embodiment of the present invention; 
         FIG. 1B  shows a rear perspective view of the self-contained pressure washer of  FIG. 1A , according to one embodiment of the present invention; 
         FIG. 1C  shows a front view of the self-contained pressure washer of  FIG. 1A , according to one embodiment of the present invention; 
         FIG. 1D  shows a rear view of the self-contained pressure washer of  FIG. 1A , according to one embodiment of the present invention; 
         FIG. 1E  shows a side view of the self-contained pressure washer of  FIG. 1A , according to one embodiment of the present invention; 
         FIG. 1F  shows a top view of the self-contained pressure washer of  FIG. 1A , according to one embodiment of the present invention; 
         FIG. 2  shows an expanded perspective view of a self-contained pressure washer, according to one embodiment of the present invention; 
         FIG. 3A  shows an exploded view of an exemplary pressure washing lance; 
         FIG. 3B  shows a section view of a portion of the exemplary pressure washing lance shown in  FIG. 3A ; 
         FIG. 3C  shows a first pressure washing output produced by the exemplary pressure washing lance shown in  FIG. 3A ; 
         FIG. 3D  shows a second pressure washing output produced by the exemplary pressure washing lance shown in  FIG. 3A ; 
         FIG. 4A  shows an exploded view of an exemplary misting lance; 
         FIG. 4B  shows a magnified exploded view of certain elements of the exemplary misting lance shown in  FIG. 4A ; 
         FIG. 4C  shows a section view of a portion of the exemplary misting lance shown in  FIG. 4A ; 
         FIG. 4D  shows a mist output produced by the exemplary misting lance shown in  FIG. 4A ; 
         FIG. 5A  shows an exploded view of an exemplary fog lance; 
         FIG. 5B  shows a magnified exploded view of certain elements of the exemplary fog lance shown in  FIG. 5A ; 
         FIG. 5C  shows a fog piston of the exemplary fog lance shown in  FIG. 5A ; 
         FIG. 5D  shows a section view of a portion of the exemplary fog lance shown in  FIG. 5A ; and 
         FIG. 5E  shows a fog output produced by the exemplary fog lance shown in  FIG. 5A . 
     
    
    
     DETAILED DESCRIPTION 
     The detailed description of exemplary embodiments herein makes reference to the accompanying drawings and pictures, which show the exemplary embodiment by way of illustration and its best mode. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that logical and mechanical changes may be made without departing from the spirit and scope of the invention. Thus, the detailed description herein is presented for purposes of illustration only and not of limitation. For example, the steps recited in any of the method or process descriptions may be executed in any order and are not limited to the order presented. Moreover, any of the functions or steps may be outsourced to or performed by one or more third parties. Furthermore, any reference to singular includes plural embodiments, and any reference to more than one component may include a singular embodiment. 
     With respect to  FIG. 1A  a front perspective view of a self-contained pressure washer  100  is illustrated. The pressure washer  100  includes a fluid (e.g., water) tank  110  that is configured to hold a volume of fluid for use. The tank  110  may be detachable or not detachable in alternative embodiments. In one embodiment, the tank  110  may be fully and/or partially transparent or translucent, for example, to allow a user to verify fluid level within the tank  110 . Any of a variety of possible fluids and/or fluid volumes (e.g., 8-gallon) may be configured to be contained within the tank  110  in certain embodiments. The tank  110  may be configured to be filled via an opening of the pressure washer  100  that permits a user to provide water into the tank  110 . In such a system, a user is not required to have any access to a nearby water source (such as a hose, faucet, etc.). To use the pressure washer  100  since a quantity of water can be stored or contained within the pressure washer  100  itself. In certain embodiments, the pressure washer  100  may be configured to draw fluid from the tank  110  for use, as discussed in greater detail below and/or, in an alternative embodiment, be configured to use fluid being presently provided from an outside source (e.g., a hose, faucet, etc.) for use. In such an embodiment, the pressure washer  100  may be capable of use in both a location where no exterior source of fluid is available and in a location where an exterior source of fluid is available in order to allow for longer duration of use of the pressure washer  100  without requiring extended storage of water in the tank prior to its use. For example, the pressure washer  100  may be immediately used, such as without requiring an external fluid source deliver any minimum input fluid pressure (e.g., kPA) and/or fluid volume within the tank  110  before operation may commence. 
     In some embodiments, the tank  110  is sized to contain 8 gallons of water. In some embodiments, the tank  110  is sized to contain between 7 gallons and 9 gallons of water. In some embodiments, the tank is sized to contain between 6 gallons and 10 gallons of water. In some embodiments, the tank is sized to contain between 5 gallons and 11 gallons of water. In some embodiments, the tank is sized to contain between 4 gallons and 12 gallons of water. 
     A filter  114  (e.g., for helping in preventing undesired particulates or other elements from entering the tank  110 ) may be provided and fit within the opening. The pressure washer  100  includes a transportation system or element(s)  115  (e.g., one or more wheels) that allow the pressure washer  100  to be conveniently transported (e.g., rolled) among different locations. For example, a bar or other holding element  117  may allow for a user to grasp or otherwise maintain control of effectuating movement of the pressure washer  100 , for example, via the transportation system or element(s)  115 . 
     A spray device  120  is in fluid communication with the tank  110  such that fluid from the tank  110  may flow (e.g., a pressurized flow) out of the spray device  120  and be directed at desired surfaces by a user of the pressure washer  100 . The spray device  120  may take any of a variety of possible forms, such as a gun or pole having a triggering element that can be manipulated (e.g., pressed or squeezed) by a user to start a spray of fluid from an opening of the spray device  120 . The spray device  120  may be connected with the tank  110  through one or more additional elements, such as a bottle or container  160 , that may, for example, be configured to hold a cleaning product such as shampoo or other chemicals (e.g., a disinfectant) for mixture with pressurized fluid from the tank  110  prior to transmittal out of the spray device  120 , as discussed in greater detail herein. 
     A holding element  140  may be included as part of the pressure washer  100 . For example, the holding element  140  may be a removable tray, bar, or other connector or surface that is configured to allow for storage or placement of devices, such as tools, brushes, nozzles, etc. therein. In this fashion, a user of the pressure washer  100  may conveniently carry tools or other elements that may be needed or desired while pressure washing and have such tools or other elements conveniently available and within reach. In another embodiment, the holding element  140  may be a depression or other surface that is manufactured (e.g., molded) as part of a panel or body component of the pressure washer  100 . 
       FIG. 1B  shows a rear perspective view of the self-contained pressure washer  100 . With reference to prior figure(s) and the previous discussion, as shown, the pressure washer  100  includes a hose (e.g., a high pressure hose)  125  that facilitates a flow of pressurized fluid that originates in the tank  110  and eventually flows to the spray device  120 , as discussed in greater detail herein In order to properly pressurize fluid (e.g., 800 psi) from the tank  110 , as discussed in greater detail here, the pressure washer  100  uses power obtained via a power cable  130  (e.g., 35 feet) connected with its associated electrical and/or mechanical components. The power cable  130  may be configured to receive and/or conduct power from any of a variety of sources (e.g., standard power outlet, car outlet, etc.) In one embodiment, the pressure washer  100  may run its electrical and/or mechanical components directly off of power received via the power cable  130  (e.g., immediate and/or continuous use while plugged in). In an alternative embodiment, the pressure washer  100  may include one or more batteries that store a charge via power received via the power cable  130 . In still another embodiment, the pressure washer  100  may be capable of both direct power use and/or battery charge storage. 
       FIG. 1C  shows a front view of the self-contained pressure washer  100 . With reference to prior figure(s) and the previous discussion, as shown, the pressure washer  100  includes electrical/mechanical components, such as a motor/pump  145  for pressurizing fluid, for example, that originates in the tank  110  for eventual transmittal to the spray device  120  via the hose  125 . An outlet  142  may be provided for providing fluid from the tank  110 , after the fluid has been pressurized by the motor/pump  145  to the hose  125  for transmission to the spray device  120 . As previously discussed, the bottle or container  160  may be configured to connect at some position between the spray device  120  and the outlet  142 , for example, in line with the hose  125  so that pressurized fluid passes through the bottle or container  160 , thereby mixing with shampoo or other chemicals contained within the bottle or container  160  prior to the fluid exiting the spray device  120 . In certain embodiments, no bottle or container  160  may be used and the spray device  120  may be configured to connect directly with the outlet  142  or other element(s) in order to be in fluid communication with the tank  110 . 
     In some embodiments, the motor/pump  145  has a voltage of between 60 V and 180 V. In some embodiments, the motor/pump  145  has a voltage of between 60 V and 160 V. In some embodiments, the motor/pump  145  has a voltage of between 60 V and 140 V. In some embodiments, the motor/pump  145  has a voltage of between 60 V and 120 V. In some embodiments, the motor/pump  145  has a voltage of between 60 V and 100 V. In some embodiments, the motor/pump  145  has a voltage of between 60 V and 80 V. In some embodiments, the motor/pump  145  has a voltage of between 80 V and 180 V. In some embodiments, the motor/pump  145  has a voltage of between 80 V and 160 V. In some embodiments, the motor/pump  145  has a voltage of between 80 V and 140 V. In some embodiments, the motor/pump  145  has a voltage of between 80 V and 120 V. In some embodiments, the motor/pump  145  has a voltage of between 80 V and 100 V. In some embodiments, the motor/pump  145  has a voltage of between 100 V and 180 V. In some embodiments, the motor/pump  145  has a voltage of between 100 V and 160 V. In some embodiments, the motor/pump  145  has a voltage of between 100 V and 140 V. In some embodiments, the motor/pump  145  has a voltage of between 100 V and 120 V. In some embodiments, the motor/pump  145  has a voltage of between 120 V and 180 V. In some embodiments, the motor/pump  145  has a voltage of between 120 V and 160 V. In some embodiments, the motor/pump  145  has a voltage of between 120 V and 140 V. In some embodiments, the motor/pump  145  has a voltage of between 140 V and 180 V. In some embodiments, the motor/pump  145  has a voltage of between 140 V and 160 V. In some embodiments, the motor/pump  145  has a voltage of between 160 V and 180 V. In some embodiments, the motor/pump  145  has a voltage of between 105 V and 135 V. In some embodiments, the motor/pump  145  has a voltage of between 110 V and 120 V. In some embodiments, the motor/pump  145  has a voltage of between 115 V and 125 V. In some embodiments, the motor/pump  145  has a voltage of about 120 V. In some embodiments, the motor/pump  145  has a voltage of 120 V. 
     In some embodiments, the motor/pump  145  has a current of 9 A. In some embodiments, the motor/pump  145  has a current of between 8 A and 10 A. In some embodiments, the motor/pump  145  has a current of between 7 A and 11 A. In some embodiments, the motor/pump  145  has a voltage of 120 V, a current of 9 A, and a power of 1080 W. In some embodiments, the motor/pump  145  has a voltage of 120 V, a current of between 8 A and 10 A, and a power of between 960 W and 1200 W. In some embodiments, the motor/pump  145  is operable to produce a water pressure that is between 500 psi and 1500 psi. In some embodiments, the motor/pump  145  has a voltage of 120V and a current of 9 A, and is operable to produce a water pressure that is between 500 psi and 1500 psi. In some embodiments, the motor/pump  145  has a voltage of 120V and a current of between 8 A and 10 A, and is operable to produce a water pressure that is between 500 psi and 1500 psi. 
     In order to turn on and/or supply power to the motor/pump  145 , a user control  146  (e.g., a switch, button, etc.) is provided on a front enclosure or panel  155  of the pressure washer  100 . Although the various components discussed are illustrated and/or discussed as having particular locations on the pressure washer  100 , an alternative embodiment may locate one or more of the various elements discussed in alternative locations (e.g., the user control  146  may be disposed adjacent to the holding element  117 ). In certain embodiments, no user control  146  may be used (e.g., the motor/pump  145  may turn on without further user intervention upon supplying power, for example, upon plugging the power cable  130  into a suitable power source). 
       FIG. 1D  shows a rear view of the self-contained pressure washer  100 . With reference to prior figure(s) and the previous discussion, as shown, the pressure washer  100  includes the tank  110  that provides fluid from the tank  110  to the motor/pump  145  via a fluid hose  170  that connects the tank  110  to a fluid inlet  172  of the motor/pump  145 . Accordingly, in one embodiment during use, the pressure washer  100  is configured to take fluid (e.g., non-pressurized) from the tank  110  and supply it through the motor/pump  145  for pressurizing the fluid, and transmitting the pressurized fluid to the spray device  120  via the hose  125 . The motor/pump  145  and/or other electrical/mechanical components associated with the pressure washer  100  may use heat dissipation or cooling features, such as heatsinks, cooling slots  175 , etc. in order to keep temperatures of the electrical mechanical components a desired level to aid in proper operation.  FIG. 1D  also illustrates a strain relief  177  connected with or otherwise associated with the power cable  130 , for example, to aid in preventing damage to the power cable  130  and/or its connected components if the power washer  100  is moved or positioned at a distance from a power source that causes tugging or pulling on the power cable  130 . 
       FIG. 1E  shows a side view of the self-contained pressure washer  100 . With reference to prior figure(s) and the previous discussion, as shown, the pressure washer  100  may include an enclosure  180  that is completely and/or partially removable and configured to contain all or some of the electrical/mechanical components previously discussed, such as the motor/pump  145 . For example, the enclosure  180  may have one or more panels that may be removed in order to provide access to the electrical/mechanical components positioned therein. Such removability of the enclosure  180  and/or of elements of the enclosure  180  (e.g., one or more panels or surfaces making up the enclosure  180 ) may permit repair or replacement access should one or more of the electrical/mechanical components require servicing. 
       FIG. 1F  shows a top view of the self-contained pressure washer  100 . With reference to prior figure(s) and the previous discussion, as shown, the pressure washer  100  may include a filter  190  for filtering the fluid being transmitted from the tank  110  prior to the fluid being flowed out of the spray device  120 . The filter  190  may be configured to filter all or some of the fluid from the tank. In certain embodiments, a second filter, such as a filter configured to engage with fluid after it has already passed through the filter  190 , may be provided with the pressure washer  100  in order to include dual-stage filtering. The second filter may be included adjacent to the filter  190 , and/or at any of a variety of other locations (e.g., within the tank  110 , between the tank  110  and the motor/pump  145 , between the motor/pump  145  and the spray device  120 , etc. Indeed, any of a variety of possible filtration components and/or locations may be used in various embodiments. The pressure washer  100  may also include any of a variety of possible dimensions, such as a total width  195  of 18-19 inches. 
     In some embodiments, the flow rate of fluid from the tank  110  to the spray device  120  (e.g., the rate of water consumption of the pressure washer  100 ) is between 1 liter per minute (L/m) and 9 L/m. In some embodiments, the flow rate is between 1 L/m and 8 L/m. In some embodiments, the flow rate is between 1 L/m and 7 L/m. In some embodiments, the flow rate is between 1 L/m and 6 L/m. In some embodiments, the flow rate is between 1 L/m and 5 L/m. In some embodiments, the flow rate is between 1 L/m and 4 L/m. In some embodiments, the flow rate is between 1 L/m and 3 L/m. In some embodiments, the flow rate is between 1 L/m and 2 L/m. In some embodiments, the flow rate is between 2 L/m and 9 L/m. In some embodiments, the flow rate is between 2 L/m and 8 L/m. In some embodiments, the flow rate is between 2 L/m and 7 L/m. In some embodiments, the flow rate is between 2 L/m and 6 L/m. In some embodiments, the flow rate is between 2 L/m and 5 L/m. In some embodiments, the flow rate is between 2 L/m and 4 L/m. In some embodiments, the flow rate is between 2 L/m and 3 L/m. In some embodiments, the flow rate is between 3 L/m and 9 L/m. In some embodiments, the flow rate is between 3 L/m and 8 L/m. In some embodiments, the flow rate is between 3 L/m and 7 L/m. In some embodiments, the flow rate is between 3 L/m and 6 L/m. In some embodiments, the flow rate is between 3 L/m and 5 L/m. In some embodiments, the flow rate is between 3 L/m and 4 L/m. In some embodiments, the flow rate is between 4 L/m and 9 L/m. In some embodiments, the flow rate is between 4 L/m and 8 L/m. In some embodiments, the flow rate is between 4 L/m and 7 L/m. In some embodiments, the flow rate is between 4 L/m and 6 L/m. In some embodiments, the flow rate is between 4 L/m and 5 L/m. In some embodiments, the flow rate is between 5 L/m and 9 L/m. In some embodiments, the flow rate is between 5 L/m and 8 L/m. In some embodiments, the flow rate is between 5 L/m and 7 L/m. In some embodiments, the flow rate is between 5 L/m and 6 L/m. In some embodiments, the flow rate is between 6 L/m and 9 L/m. In some embodiments, the flow rate is between 6 L/m and 8 L/m. In some embodiments, the flow rate is between 6 L/m and 7 L/m. In some embodiments, the flow rate is between 7 L/m and 9 L/m. In some embodiments, the flow rate is between 7 L/m and 8 L/m. In some embodiments, the flow rate is between 8 L/m and 9 L/m. In some embodiments, the flow rate is between 3.5 L/m and 6.5 L/m. In some embodiments, the flow rate is between 4.5 L/m and 5.5 L/m. In some embodiments, the flow rate is about 5 L/m. In some embodiments, the flow rate is 5 L/m. 
     In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 400 psi and 1200 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 400 psi and 1000 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 400 psi and 800 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 400 psi and 600 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 600 psi and 1200 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 600 psi and 1000 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 600 psi and 800 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 800 psi and 1200 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 800 psi and 1000 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 1000 psi and 1200 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 650 psi and 950 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 700 psi and 900 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 750 psi and 850 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is between 775 psi and 825 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is about 800 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  100  is 800 psi. 
       FIG. 2  shows an expanded perspective view of a self-contained pressure washer  200 . The pressure washer  200  may include certain features that are the same as or similar to those previously discussed. Various of the pressure washer  200  components, as discussed in greater detail below, may be manufactured of lightweight and/or engineered plastics in one embodiment. As illustrated, the pressure washer  200  may include a tank  210  (e.g., a water-proof tank) that is configured to hold a volume of fluid, such as water, therein. The tank  210  may be formed of a single component or material (e.g., molded plastic) that contains a cavity therein. In an alternative embodiment, the tank  210  may be formed of a plurality of panels or surfaces that are connected together to form a hollow interior within the plurality of panels or surfaces so as to contain fluid, such as water, therein. A fill hole, or other connection and/or opening  212  may be provided to allow fluid to be disposed (e.g., from a hose) into the tank  210 . One or more labels or other elements ( 211 ,  213 ) may be configured to be applied to the tank  210  giving additional information concerning the tank  210  and/or its operation (e.g., permitted fluids, maximum and/or minimum fluid volume for use, instructions for use or start of electrical/mechanical components connected with or associated with the tank, etc.) 
       FIG. 2  also illustrates a holding component (e.g., a tray)  240  that may be configured to hold and/or contain tools or other objects, such as connectors or adapters associated with the pressure washer  100  and/or other objects, the same or similar to previous discussions. A filter (e.g., a fluid filter)  214  may be configured to be accepted within an opening of the pressure washer  100 , for example, to be at least partially received in the opening  212 . The fluid filter  214  may be configured to be removable from the opening  212  and/or may be configured to be permanently affixed in place but still allow for fluid to flow there through (e.g., through use of slots, mesh, etc.). In such a fashion, the fluid filter  214  may be configured to allow for the tank  210  to be filled with fluid (e.g., by pouring fluid into the fluid filter  214  and thereby exiting the fluid filter  214  and through the opening  212  into the tank  210 . The filter may help in preventing undesired particulates from entering the tank  210  and potentially interfering with operation of the pressure washer  100 . 
     A handle or other maneuvering component  217  may be connected with the tank  210  to permit user movement of the pressure washer  100 , for example, via one or more locomotion elements ( 215 ,  216 ), such as wheels as illustrated (e.g., having diameter(s) of greater or less than those explicitly shown (such as 10 inches) in the exemplary  FIG. 1  illustration). The locomotion elements ( 215 ,  216 ) may be connected via a rod or other connector  213  in certain embodiments. In an alternative embodiment, greater or fewer wheels, or alternative and/or fewer and/or additional locomotion elements may be used. 
     A motor and/or pump, and associated electrical and/or mechanical components  245 , such as cabling, cooling elements, etc. is at least partially contained within a lower enclosure  257  (e.g., constructed of a front panel  255  and a rear panel  256 ). In an alternative embodiment, other manufacturing techniques and/or methods may be used for forming the lower enclosure  257  (e.g., only one component comprising the entire enclosure and/or additional and/or alternative configurations of paneling, surfaces, or elements making up the exterior of the lower enclosure  257 ). The lower enclosure  257  may include a variety of possible cooling features or elements (e.g., powered or unpowered), such as slots, openings, fans, etc. for helping maintain the motor and/or pump, and associated electrical and/or mechanical components  245  at an acceptable operating temperature. For example, cooling openings  258  are illustrated and may allow airflow into the cavity of the lower enclosure  257  that at least partially contains the motor and/or pump and associated electrical and/or mechanical components  245 . A power cable  230  and/or other or additional component (e.g., one or more batteries) may be provided for supplying power to the motor and/or pump, and associated electrical and/or mechanical components  245 . 
     In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 60 V and 180 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 60 V and 160 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 60 V and 140 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 60 V and 120 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 60 V and 100 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 60 V and 80 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 80 V and 180 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 80 V and 160 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 80 V and 140 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 80 V and 120 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 80 V and 100 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 100 V and 180 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 100 V and 160 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 100 V and 140 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 100 V and 120 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 120 V and 180 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 120 V and 160 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 120 V and 140 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 140 V and 180 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 140 V and 160 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 160 V and 180 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 105 V and 135 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 110 V and 120 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of between 115 V and 125 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of about 120 V. In some embodiments, the motor and/or pump and associated electrical and/or mechanical components  245  has a voltage of 120 V. 
     The motor and/or pump, and associated electrical and/or mechanical components  245  may be turned on via a user-interfaceable element (e.g., a button, switch, etc.)  246 . In certain embodiments, the user-interfaceable element  246  may have a cover, label, or other means of information  249  disposed thereon or connected therewith (e.g., adhered to) to indicate to a user the operation that results from manipulation of the user-interfaceable element  246 . When in operation, the motor and/or pump, and associated electrical and/or mechanical components  245  may operate to pressurize fluid from the tank  210  (e.g., received via an interconnecting conduit  270 ) and flow the pressurized fluid, via a hose (e.g., a pressurized hose) or other conduit  225  to a spray device  220 . The same or similar to previous discussions, additional equipment or devices (e.g., one or more bottles or containers  260  containing cleaning fluid or other desired chemicals or particulates, such as disinfectant) to be added to the pressurized fluid) may be provided and/or connected in like with the flowing fluid prior to the fluid being expelled from the spray device  220 . 
     In some embodiments, the flow rate of fluid from the tank  210  to the spray device  220  (e.g., the rate of water consumption of the pressure washer  200 ) is between 1 liter per minute (L/m) and 9 L/m. In some embodiments, the flow rate is between 1 L/m and 8 L/m. In some embodiments, the flow rate is between 1 L/m and 7 L/m. In some embodiments, the flow rate is between 1 L/m and 6 L/m. In some embodiments, the flow rate is between 1 L/m and 5 L/m. In some embodiments, the flow rate is between 1 L/m and 4 L/m. In some embodiments, the flow rate is between 1 L/m and 3 L/m. In some embodiments, the flow rate is between 1 L/m and 2 L/m. In some embodiments, the flow rate is between 2 L/m and 9 L/m. In some embodiments, the flow rate is between 2 L/m and 8 L/m. In some embodiments, the flow rate is between 2 L/m and 7 L/m. In some embodiments, the flow rate is between 2 L/m and 6 L/m. In some embodiments, the flow rate is between 2 L/m and 5 L/m. In some embodiments, the flow rate is between 2 L/m and 4 L/m. In some embodiments, the flow rate is between 2 L/m and 3 L/m. In some embodiments, the flow rate is between 3 L/m and 9 L/m. In some embodiments, the flow rate is between 3 L/m and 8 L/m. In some embodiments, the flow rate is between 3 L/m and 7 L/m. In some embodiments, the flow rate is between 3 L/m and 6 L/m. In some embodiments, the flow rate is between 3 L/m and 5 L/m. In some embodiments, the flow rate is between 3 L/m and 4 L/m. In some embodiments, the flow rate is between 4 L/m and 9 L/m. In some embodiments, the flow rate is between 4 L/m and 8 L/m. In some embodiments, the flow rate is between 4 L/m and 7 L/m. In some embodiments, the flow rate is between 4 L/m and 6 L/m. In some embodiments, the flow rate is between 4 L/m and 5 L/m. In some embodiments, the flow rate is between 5 L/m and 9 L/m. In some embodiments, the flow rate is between 5 L/m and 8 L/m. In some embodiments, the flow rate is between 5 L/m and 7 L/m. In some embodiments, the flow rate is between 5 L/m and 6 L/m. In some embodiments, the flow rate is between 6 L/m and 9 L/m. In some embodiments, the flow rate is between 6 L/m and 8 L/m. In some embodiments, the flow rate is between 6 L/m and 7 L/m. In some embodiments, the flow rate is between 7 L/m and 9 L/m. In some embodiments, the flow rate is between 7 L/m and 8 L/m. In some embodiments, the flow rate is between 8 L/m and 9 L/m. In some embodiments, the flow rate is between 3.5 L/m and 6.5 L/m. In some embodiments, the flow rate is between 4.5 L/m and 5.5 L/m. In some embodiments, the flow rate is about 5 L/m. In some embodiments, the flow rate is 5 L/m. 
     In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 400 psi and 1200 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 400 psi and 1000 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 400 psi and 800 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 400 psi and 600 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 600 psi and 1200 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 600 psi and 1000 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 600 psi and 800 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 800 psi and 1200 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 800 psi and 1000 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 1000 psi and 1200 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 650 psi and 950 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 700 psi and 900 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 750 psi and 850 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is between 775 psi and 825 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is about 800 psi. In some embodiments, the pressure of the fluid delivered by the pressure washer  200  is 800 psi. 
     In one embodiment, the spray device  220  may include a handle/triggering component  221 , a connecting rod or component  222  and an expelling rod or component  223 . As pressurized fluid, such as water, is received at the spray device  220 , e.g., from the hose  225 , a user may manipulate a triggering element associated with the handle/triggering component  221  (e.g., a button, switch, trigger, etc.) that permits the pressurized fluid to transmit through the connecting rod or component  222 . The pressurized fluid may exit the connecting rod or component  222  and travel through the further expelling rod or component  223  (e.g., to provide an extension for allowing a user to reach areas, such as high elevation surfaces, that might otherwise be difficult to reach). Any of a variety of possible adapters or components (e.g., spray nozzles, filters, containers for mixing with the pressurized fluid, such as the bottle or container  260 ) may be configured to connect with any or all of the handle/triggering component  221 , the connecting rod or component  222  and/or the expelling rod or component  223 . In this fashion, the spray device  220  may be customized by a particular user for a particular desired task, using a variety of possible attachments (e.g., by screwing, snapping, or otherwise adhering such attachments to one or more portions of the spray device  220 . Various, screws, bolts, nuts, washer, clamps, grommets, etc. may be used as desired for securement or connection of parts. 
     In some embodiments, the pressure washer  200  includes a plurality of interchangeable types of the expelling rod or component  223  (which may alternately be referred to as interchangeable “lances”). In some embodiments, the pressure washer  200  includes one of the expelling rod or component  223  that is a pressure washing lance  300 . In some embodiments, the pressure washer  200  includes one of the expelling rod or component  223  that is a misting lance  400 . In some embodiments, the pressure washer  200  includes one of the expelling rod or component  223  that is a fog lance  500 . In some embodiments, the pressure washer  200  includes two of, or all three of, the pressure washing lance  300 , the misting lance  400 , and the fog lance  500 . 
       FIG. 3A  shows an exploded view of an exemplary pressure washing lance  300  and  FIG. 3B  shows a section view of a head portion of the assembled pressure washing lance  300 . In some embodiments, the pressure washing lance  300  includes a connector portion  302  that is configured to be coupled to the connecting rod or component  222  described above. In some embodiments, the pressure washing lance  300  includes a pressure washer nozzle  304  that is sized and shaped to output a supply of water provided along the connector portion  302  in a manner that is appropriate for pressure washing. In some embodiments, the pressure washing lance  300  includes an O-ring  306  providing sealing between the connector portion  302  and the pressure washer nozzle  304 . In some embodiments, the pressure washing lance  300  includes a nozzle regulator  308 . In some embodiments, the nozzle regulator  308  is operable to adjust a spray pattern output by the pressure washing lance  300 . In some embodiments, the pressure washing lance  300  includes a lance cover  310  that is configured to connect to the connector portion  302  and to enclose the pressure washer nozzle  304 , the O-ring  306 , and the nozzle regulator  308 .  FIG. 3C  shows a pressure washing spray output by the pressure washing lance  300  as adjusted to produce a narrow output spray.  FIG. 3D  shows a pressure washing spray output by the pressure washing lance  300  as adjusted to produce a wide output spray. It will be apparent to those of skill in the art the inclusion of two types of output sprays is only illustrative and that embodiments of the pressure washing lance  300  may be adjustable to produce a different number of spray patterns (e.g., three, four, five, six, etc.). 
     In some embodiments, the pressure washer nozzle  304  is configured to output water at a flow rate of about 5 liters per minute (e.g., 5 liters per minute, or between 4.75 liters per minute and 5.25 liters per minute, or between 4.5 liters per minute and 5.5 liters per minute, or between 4.25 liters per minute and 5.75 liters per minute, or between 4 liters per minute and 6 liters per minute, or between 3.75 liters per minute and 6.25 liters per minute, or between 3.5 liters per minute and 6.5 liters per minute). In some embodiments, the pressure washer nozzle  304  is configured to output water at a working pressure of about 800 psi (e.g., 800 psi, or between 775 psi and 825 psi, or between 750 psi and 850 psi, or between 725 psi and 875 psi, or between 700 psi and 900 psi, or between 675 psi and 925 psi, or between 650 psi and 950 psi). 
       FIG. 4A  shows an exploded view of an exemplary misting lance  400 ,  FIG. 4B  shows a magnified exploded view of certain elements of the misting lance  400 , and  FIG. 4C  shows a section view of a head portion of the assembled misting lance  400 . In some embodiments, the misting lance  400  includes a connector portion  402  that is configured to be coupled to the connecting rod or component  222  described above. In some embodiments, the misting lance  400  includes a misting nozzle  450  that is sized and shaped to output a supply of water provided along the connector portion  402  in a manner that is appropriate for misting. In some embodiments, the misting nozzle  450  is sized and shaped to output water at a droplet size that is in the range of from 20 to 40 microns. In some embodiments, the misting nozzle  450  is sized and shaped to output water at a flow rate of about 450 milliliters per minute (e.g., 450 milliliters per minute, or from 425 to 475 milliliters per minute, or from 400 to 500 milliliters per minute, or from 375 to 525 milliliters per minute, or from 350 to 550 milliliters per minute). In some embodiments, the misting nozzle  450  is sized and shaped to output water at a working pressure that is from 700 to 1,500 psi. In some embodiments, the output of the misting lance  400  is suitable for use at medium to large distances, such as in outdoor settings such as the exterior of buildings, warehouses, etc. In some embodiments, the misting lance  400  includes a nozzle support  404  that is configured to connect the misting nozzle  450  to the connector portion  402  and to support the misting nozzle  450 . In some embodiments, the misting lance  400  includes an O-ring  406  providing sealing between the connector portion  402  and the nozzle support  404 . In some embodiments, the misting lance  400  includes a set screw  410  that retains the nozzle support  404  in its place. In some embodiments, the misting lance  400  includes a lance cover  412  that is configured to connect to the connector portion  402  and to enclose the misting nozzle  450 , the nozzle support  404 , and the O-ring  406 . 
     Referring now to  FIG. 4B , a detailed view of elements of the misting nozzle  450  is shown. In some embodiments, the misting nozzle  450  includes a nozzle body  452  that attaches to the nozzle support  404  and contains the remaining elements of the misting nozzle  450 . In some embodiments, the misting nozzle  450  includes a nozzle lid  454  that is positioned over the nozzle body  452  and includes a hole  456  through which water passes to produce mist. In some embodiments, the hole  456  is sized and shaped so as to allow water to pass therethrough so as to produce mist that travels a sufficient distance (e.g., at least 1 meter) to allow the mist to applied to a target at a sufficient range, while limiting the flow rate of the water (e.g., less than about 170 mL per minute) so as to allow the self-contained pressure washer  200  (e.g., which has an integrated water tank of finite capacity rather than being coupled to an external water supply) to produce mist for a sufficient duration. In some embodiments, the hole  456  has a diameter of 0.4 mm. In some embodiments, the hole  456  has a diameter of from 0.39 mm to 0.41 mm. In some embodiments, the hole  456  has a diameter of from 0.38 mm to 0.42 mm. In some embodiments, the hole  456  has a diameter of from 0.37 mm to 0.43 mm. In some embodiments, the hole  456  has a diameter of from 0.36 mm to 0.44 mm. In some embodiments, the hole  456  has a diameter of from 0.35 mm to 0.45 mm. In some embodiments, the misting nozzle  450  includes O-rings  458  and  460  positioned to either side of the nozzle body  452  to prevent leaks within the misting nozzle  450 . In some embodiments, the misting nozzle  450  includes an identification O-ring  462  that is color-coded to identify the misting nozzle  450 . In some embodiments, the misting nozzle  450  includes a nozzle cap  464  that attaches to the nozzle body  452  to retain the nozzle lid  454 , the O-ring  460 , and the identification O-ring  462  therebetween. 
     In some embodiments, the motor/pump  245  provides sufficient pressure to the water flowing to the misting nozzle  450  such that the misting nozzle  450  generates a mist output solely based on the pressurization of the water, e.g., without the use of an external air source such as a source of pressurized air.  FIG. 4D  shows a misting spray output by the misting lance  400 . 
       FIG. 5A  shows an exploded view of an exemplary fog lance  500 ,  FIG. 5B  shows a magnified exploded view of certain elements of the fog lance  500 , and  FIG. 5D  shows a section view of a head portion of the assembled fog lance  500 . In some embodiments, the fog lance  500  includes a connector portion  502  that is configured to be coupled to the connecting rod or component  222  described above. In some embodiments, the fog lance  500  includes a fog nozzle  550  that is sized and shaped to output a supply of water provided along the connector portion  502  in a manner that is appropriate for fogging. In some embodiments, the fog nozzle  550  is sized and shaped to output water having an average droplet size of about 20 microns (e.g., from 19 microns to 21 microns, or from 18 microns to 22 microns, or from 17 microns to 23 microns, or from 16 microns to 24 microns, or from 15 microns to 25 microns, or from 14 microns to 26 microns, or from 13 microns to 27 microns, or from 12 microns to 28 microns, or from 11 microns to 29 microns, or from 10 microns to 30 microns). In some embodiments, the fog nozzle  550  is sized and shaped to output water at a flow rate of less than 170 milliliters per minute (e.g., about 170 milliliters per minute, or about 165 milliliters per minute, or about 160 milliliters per minute, or about 155 milliliters per minute, or about 150 milliliters per minute, or about 145 milliliters per minute, or about 140 milliliters per minute, or about 135 milliliters per minute, or about 130 milliliters per minute, or about 125 milliliters per minute, or about 120 milliliters per minute, or about 115 milliliters per minute, or about 110 milliliters per minute, or about 105 milliliters per minute, or about 100 milliliters per minute). In some embodiments, the fog nozzle  550  is sized and shaped to output water at a working pressure that is from 500 to 1,500 psi. In some embodiments, the output of the fog lance  500  is suitable for use at short to medium distances, such as in indoor settings such as offices, schools, etc. In some embodiments, the bottles or containers  260  contain a disinfectant and the pressure washer  200  including the fog lance  500  is suitable for use as a self-contained sanitizing machine. In some embodiments, the fog lance  500  includes a nozzle support  504  that is configured to connect the fog nozzle  550  to the connector portion  502  and to support the fog nozzle  550 . In some embodiments, the fog lance  500  includes an O-ring  506  providing sealing between the connector portion  502  and the nozzle support  504 . In some embodiments, the fog lance  500  includes a set screw  510  that retains the nozzle support  504  in its place. In some embodiments, the fog lance  500  includes a lance cover  512  that is configured to connect to the connector portion  502  and to enclose the fog nozzle  550 , the nozzle support  504 , and the O-ring  506 . 
     Referring now to  FIG. 5B , a detailed view of elements of the fog nozzle  550  is shown. In some embodiments, the fog nozzle  550  includes a nozzle body  552  that attaches to the nozzle support  504  and contains the remaining elements of the fog nozzle  550 . In some embodiments, the fog nozzle  550  includes a nozzle lid  554  that is positioned over the nozzle body  552  and includes a hole  556  through which water passes to produce fog. In some embodiments, the fog nozzle  550  includes a fog piston  558 . In some embodiments, the fog piston  558  includes curved cuts  559  that are sized and shaped to cause water passing therethrough to form a cyclone.  FIG. 5C  shows a magnified view of an exemplary fog piston  558  including the curved cuts  559 . In some embodiments, the hole  556  is sized and shaped such that the passage of water therethrough, having first passed through the curved cuts of the fog piston  558 , produces mist that travels a sufficient distance (e.g., less than one meter) to allow the fog to applied to a target, while limiting the flow rate of the water (e.g., less than about 170 mL per minute) so as to allow the self-contained pressure washer  200  (e.g., which has an integrated water tank of finite capacity rather than being coupled to an external water supply) to produce fog for a sufficient duration. In some embodiments, the hole  556  has a diameter of 0.4 mm. In some embodiments, the hole  556  has a diameter of from 0.39 mm to 0.41 mm. In some embodiments, the hole  556  has a diameter of from 0.38 mm to 0.42 mm. In some embodiments, the hole  556  has a diameter of from 0.37 mm to 0.43 mm. In some embodiments, the hole  556  has a diameter of from 0.36 mm to 0.44 mm. In some embodiments, the hole  556  has a diameter of from 0.35 mm to 0.45 mm. In some embodiments, the misting nozzle  550  includes O-rings  560  and  562  positioned to either side of the nozzle body  552  to prevent leaks within the fog nozzle  550 . In some embodiments, the fog nozzle  550  includes a nozzle cap  564  that attaches to the nozzle body  552  to retain the nozzle lid  554 , the O-ring  562 , and the fog piston  558  therebetween. 
     In some embodiments, the motor/pump  245  provides sufficient pressure to the water flowing to the fog nozzle  550  such that the fog nozzle  550  generates a fog output solely based on the pressurization of the water, e.g., without the use of an external air source such as a source of pressurized air.  FIG. 5E  shows a fog output by the fog lance  500 . 
     Test Results 
     Testing was conducted to identify a suitable combination of a motor/pump and a misting lance so as to provide acceptable misting performance. The testing evaluated the performance of eight different misting lances, each of which had a with a differently sized outlet hole from the other misting lances. Each misting lance was tested with two different motor/pumps having different electrical current ratings, and thereby different electrical power, from one another, resulting in sixteen test samples. Combinations of motor/pump and nozzle were evaluated to determine whether they would provide (1) mist reaching to at least 1 meter from the nozzle in order to provide sufficient range, and (2) a maximum flow rate of 170 milliliters per minute in order to provide a sufficiently long duration of use (e.g., at least three hours of use based on a self-contained water supply of 8 gallons). The table below summarizes the test results: 
     
       
         
           
               
               
               
               
             
               
                   
               
               
                 Test 
                   
                 Motor/Pump A 
                 Motor/Pump B 
               
               
                 Nozzle 
                 Hole Size 
                 7 A/400-500 psi 
                 9 A/500-1500 psi 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 A 
                 0.1 
                 mm 
                 Nozzle does not mist 
                 Mist distance 0.4 m 
               
               
                   
                   
                   
                   
                 Flow rate 0.015 L/min 
               
               
                 B 
                 0.15 
                 mm 
                 Nozzle does not mist 
                 Mist distance 0.5 m 
               
               
                   
                   
                   
                   
                 Flow rate 0.025 L/min 
               
               
                 C 
                 0.2 
                 mm 
                 Nozzle does not mist 
                 Mist distance 0.7 m 
               
               
                   
                   
                   
                   
                 Flow rate 0.04 L/min 
               
               
                 D 
                 0.3 
                 mm 
                 Nozzle does not mist 
                 Mist distance 0.75 m 
               
               
                   
                   
                   
                   
                 Flow rate 0.1 L/min 
               
               
                 E 
                 0.4 
                 mm 
                 Nozzle does not mist 
                 Mist distance 1.1 m 
               
               
                   
                   
                   
                   
                 Flow rate 0.15 L/min 
               
               
                 F 
                 0.5 
                 mm 
                 Nozzle does not mist 
                 Mist distance 1.5 m 
               
               
                   
                   
                   
                   
                 Flow rate 0.18 L/min 
               
               
                 G 
                 0.6 
                 mm 
                 Nozzle does not mist 
                 Mist distance 1.8 m 
               
               
                   
                   
                   
                   
                 Flow rate 0.2 L/min 
               
               
                 H 
                 0.8 
                 mm 
                 Nozzle does not mist 
                 Mist distance 2.0 m 
               
               
                   
                   
                   
                   
                 Flow rate 0.35 L/min 
               
               
                   
               
            
           
         
       
     
     Based on the above, it may be seen that only test nozzle E, having a hole size of 0.4 mm, provides suitable performance for use in a misting lance of a self-contained pressure washer (i.e., produces mist at a sufficient distance while consuming a sufficiently low flow rate of water to be used for a sufficient duration). 
     In an embodiment, a pressure washer includes a tank configured to contain a volume of water, the tank having an opening therein for provision of water into the tank; a first filter disposed within the opening for filtering of water being provided into the tank for providing a first level of filtration to water associated with the tank; a second filter for providing a second level of filtration to water associated with the tank; a pump for pressurizing at least a portion of the volume of water from the tank; and a spray device, in communication with the pump, for outputting the pressurized portion of the volume of water. 
     In an embodiment, a method for providing a pressurized fluid includes providing a tank configured to contain a volume of water, the tank having an opening therein for provision of water into the tank; providing a first filter disposed within the opening for filtering of water being provided into the tank for providing a first level of filtration to water associated with the tank; providing a second filter for providing a second level of filtration to water associated with the tank; providing a pump for pressurizing at least a portion of the volume of water from the tank; providing a spray device, in communication with the pump, for outputting the pressurized portion of the volume of water; receiving water into the tank; filtering at least a portion of the water using the first filter and the second filter; pressurizing at least a portion of the water using the pump; and outputting the pressurized water using the spray device. 
     In some embodiments, a self-contained pressure washer is capable of water provision via a fluid tank and/or a connected exterior fluid source. In some embodiments, the pressure washer includes a motor/pump for pressurizing fluid received from the fluid tank and providing such pressurized fluid to a spray device. In some embodiments, the spray device is configured to accept multiple accessories and/or attachments. In some embodiments, the pressure washer includes a filtration system, such as a 2-step filtration system, to ensure cleanliness of the fluid used by the pressure washer. In some embodiments, the pressure washer is manufactured of lightweight materials. In some embodiments, the pressure washer includes plug-and-play and/or modular construction. In some embodiments, the pressure washer includes locomotion elements for convenient mobility. 
     The previous description of the disclosed examples is provided to enable any person of ordinary skill in the art to make or use the disclosed methods and apparatus. Various modifications to these examples will be readily apparent to those skilled in the art, and the principles defined herein may be applied to other examples without departing from the spirit or scope of the disclosed method and apparatus. The described embodiments are to be considered in all respects only as illustrative and not restrictive and the scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed apparatus and methods. The steps of the method or algorithm may also be performed in an alternate order from those provided in the examples. 
     For example, certain features, though not all features discussed and/or illustrated in  FIGS. 1A-2  may be present or used for a particular pressure washing method, system, and/or apparatus. Additional and/or alternative features may also be present or used for a particular pressure washing method, system, and/or apparatus.