Pressure washer systems and methods
The described pressure washing device addresses maneuverability and cleaning efficiency issues by incorporating a rotatable drum and internal motor-pump configuration, along with features like a power cord reel and wheels, enabling flexible cleaning of varied surfaces.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-03-05
AI Technical Summary
Conventional pressure washing devices face inefficiencies due to bulky motor, compressor, and pump arrangements, leading to inferior cleaning performance and difficulty in maneuverability, especially when dealing with varied surface geometries and cleaning needs.
A pressure washing device with a frame, rotatable drum, and internal motor and pump configuration, along with features like a power cord reel, wheels, and interchangeable lance modes, enhances maneuverability and cleaning flexibility.
The solution provides a balance between ease-of-use and power, allowing for efficient cleaning of diverse surfaces with improved maneuverability and adaptable cleaning patterns.
Smart Images

Figure CN2025071607_05032026_PF_FP_ABST
Abstract
Description
PRESSURE WASHER SYSTEMS AND METHODS
[0001] CROSS REFERENCES TO RELATED APPLICATIONS
[0002] The present application claims priority to U.S. Provisional Patent Application No. 63 / 688,296, filed August 28, 2024, and U.S. Provisional Patent Application No. 63 / 688,853, filed August 29, 2024, which are hereby incorporated by reference in their entirety.TECHNICAL FIELD
[0003] Pressure washer systems and components thereof are provided.BACKGROUND
[0004] Conventional pressurized washing devices can include detachable pressurized spray nozzles for providing optimal fluid distribution to a variety of surfaces. During operation of pressurized washing devices, detachable pressurized spray nozzle often requires a hose attachment and an in-line or split configuration for a motor compressor and pump. Generally, the arrangement of the motor, compressor and pump can be bulky and unmanageable when trying to move the pressure washing device to multiple locations. For instance, the compressor and pump may be located on the exterior of a support housing and the hose may be inconsistently wound about the pressure washing device. These inefficiencies can lead to inferior cleaning performance and decreased operational capabilities of the pressure washing device. Depending on the difficulty of reaching a given surface for cleaning, pressure washing devices with more compact geometry may be necessary. Similarly, certain distribution patterns can be more efficient that others when trying to provide coverage to surfaces having a variety of shapes and sizes, which is why devices capable of providing multiple options for coverage are desirable.SUMMARY
[0005] Pressure washing systems and accessories usable with those systems are provided.
[0006] In one embodiment a pressure washing device. The pressure washing device can include a frame defining a fluid inlet thereon, a drum supported by the frame and rotatable relative to the frame about a rotational axis, and a motor and pump disposed within the drum and intersecting the rotational axis. The drum can be configured to support a hose wrapped therearound. The motor and pump can be configured to pressurize fluid received via the fluid inlet and deliver pressurized fluid via the hose to a lance coupled to the hose. The drum can be configured to rotate about the rotational axis while the motor and regulator remain fixed relative to the frame, and the motor and pump can be aligned with each other about the rotational axis.
[0007] The pressure washing device can vary in a number of ways. For example, the pressure washing device can include a power cord configured to transport power to the motor and pump, and a power cord reel intersecting the rotational axis. The power cord reel can be configured to support the power cord around an exterior thereof. In some variations, the power cord reel can be rotatable relative to the longitudinal axis. In some aspects, the power cord reel can be rotatable independently of the drum. In other aspects, the power cord reel can be configured to be selectively coupled to the drum such that the drum and the power cord reel can be rotated together. In other variations, the pressure washing device can include a spring configured to supply a torque to the power cord reel to automatically wind the power cord. For example, the pressure washing device can include a crank extending from an end of the drum, wherein actuation of the crank is configured to rotate the drum about the rotational axis. For example, the lance can be configured to couple to the frame. In some variations, the pressure washing device can include a plurality of wheels coupled to the frame. In other variations, the lance can include a trigger configured to cause the lance to emit pressurized fluid. Coupling the lance to the frame can be configured to actuate a trigger lock configured to prevent actuation of the trigger while the lance is coupled to the frame.
[0008] In another embodiment, a pressure washing device is provided. The pressure washing device can include a pressure washing body comprising a frame and a drum rotatably coupled to the frame, a motor and a pump disposed within the drum, and a lance fluidly coupled to the pressure washing body via the hose. The drum can define a central cavity and configured to wind and unwind a hose around an exterior thereof. The motor and the pump can be configured to receive and pressurize at least one cleaning fluid, and the lance can be configured to emit the at least one cleaning fluid pressurized by the motor and the pump.
[0009] For example, the drum can be configured to rotate about a rotational axis intersecting the motor and the pump, while the motor and the pump can be configured to remained fixed relative to the frame. In some variations, the pressure washing device can include a crank coupled to the drum, wherein actuation of the crank can be configured to rotate the drum about the rotational axis. For example, the pressure washing device can include a power cord configured to transport power to the motor and pump, and a power cord reel intersecting the rotational axis. The power cord reel can be configured to support the power cord around an exterior thereof. In some variations, the power cord reel can be rotatable relative to the longitudinal axis. In some aspects, the power cord reel can be rotatable independently of the drum. In other aspects, the power cord reel is configured to be selectively coupled to the drum such that the drum and the power cord reel can be rotated together. In other variations, the pressure washing device can include a spring configured to supply a torque to the power cord reel to automatically wind the power cord. For example, the lance can be configured to be selectively docked on the pressure washing body. In some variations, the pressure washing body can include a plurality of wheels about which the pressure washing device can be maneuvered, and the lance can be configured to operate as a handle by which to maneuver the pressure washing device when the lance is docked on the pressure washing body.
[0010] In another embodiment, a pressure washing device is provided. The pressure washing device can include a pressure washing body configured to receive and pressurize a fluid, and a lance. The pressure washing body can have a plurality of wheels thereon. The pressure washing device can be movable between a use mode in which the lance is decoupled from the pressure washing body and configured to emit the pressurized fluid and a transportation mode in which the lance is coupled to the pressure washing body and configured to operate as a handle by which the pressure washing body can be maneuvered via the plurality of wheels.
[0011] The pressure washing device can vary in a number of ways. For example, the lance can include a trigger lock movable between a first position in which the lance is configured to emit the pressurized fluid and a second position in which the lance is prevented from emitting the pressurized fluid by the trigger lock. In some variations, the trigger lock can be configured to automatically move to the second position when the pressure washing device is in the transportation mode. For example, the pressure washing body can include a frame and a drum rotatably coupled to the frame. The drum can define a central cavity and configured to wind and unwind a hose around an exterior thereof. The hose can fluidly couple the pressure washing body and the lance. In some variations, the pressure washing body can include a pump and a motor disposed within the central cavity. The pump and the motor can be fixed to the frame such that the drum is configured to rotate relative to the frame, the pump, and the motor.
[0012] In another embodiment, a pressure washing device is provided. The pressure washing device can include a pressure washing body configured to receive and pressurize and first fluid, and a lance fluidly coupled to the pressurized body and configured to emit the pressurized first fluid from the pressure washing body. The lance can include a handle including a spray trigger, a barrel extending from handle, at least one fluid container coupled to the handle, and an actuator that, upon actuation, is configured to cause the at least one fluid container to selectively dispense the stored at least one second fluid. The at least one fluid container can be configured to store and selectively dispense at least one second fluid into a flow path of the first fluid.
[0013] The pressure washing device can vary in a number of ways. For example, the at least one fluid container can include a first fluid container and a second fluid container. The at least one second fluid can include a second fluid stored and dispensed from the first fluid container and a third fluid stored and disposed from the second fluid container. In some variations, the actuator, upon actuation, can be configured to cause one of: the first fluid container to dispense the second fluid into the flow path, the second fluid container to dispense the third fluid into the flow path, and the first fluid container and the second fluid container to simultaneously dispense the second and third fluids into the flow path. For example, the pressure washing body can include a frame, a drum rotatably coupled to the frame and configured to support a hose on an exterior thereof, and a pump unit disposed in an interior of the drum. In some variations, the pump unit can be fixed to the frame, and the drum can be configured to rotate relative to the frame and the pump unit. In other variations, the drum can be supported on a plurality of drum bearings. In further variations, the pressure washing device can include a crank disposed on the drum. The crank can be configured to be actuated to cause the drum to rotate. For example, the pressure washing body can include a plurality of wheels. For example, the pressure washing device can include an extension configured to couple to an end of the barrel. The extension can be configured to receive and transmit pressurized fluid emitted by the barrel. In some variations, the pressure washing device can include at least one accessory configured to alter an emission pattern pressurized fluid. The at least one accessory can be configured to selectively couple to either the end of the barrel or to an end of the extension.
[0014] In another embodiment, a pressure washing unit is provided. The pressure washing unit can include a lance, which can include a handle including a spray trigger configured to be actuated by a user, a barrel configured to emit pressurized fluid therefrom upon actuation of the trigger, and a first push rod extending from the handle to an distal end of the barrel. The push rod can be slidable along the lance. The pressure washing unit can also include an extension configured to removably couple to the distal end of the barrel. The extension can define a flow path and configured to transmit pressurized fluid along the flow path, and the extension can include a second push rod configured to longitudinally align with the first push rod when the extension is coupled to the barrel.
[0015] The pressure washing unit can vary in a number of ways. For example, a distal end of the extension can be configured to couple to a removable accessory configured to alter a spray pattern of pressurized fluid transmitted by the barrel. In some variations, the lance can include an actuator configured to, upon actuation, cause the first push rod and the second push rod to translate and eject a coupled removable accessory. For example, the lance can include a linkage configured to convert proximal translation of the first push rod to distal translation of the second push rod. In some variations, the lance can include an actuator configured to eject an accessory coupled to the extension upon actuation through longitudinal translation of the first and second push rods. In other variations, the extension can include a detent configured to automatically lock and prevent actuation of the spray trigger upon docking the extension on a pressure washing body through longitudinal translation of the first and second push rods. For example, the lance can include at least one chemical container configured to store and selectively dispense a chemical agent into a flow path of the pressurized fluid. In some variations, the at least one chemical container can include a first chemical container configured to store and selectively dispense a first chemical agent and a second chemical container configured to store and selectively dispense a second chemical agent. In some aspects, the lance can include a chemical actuator that, upon actuation, is configured to: facilitate dispensing of the first chemical agent from the first chemical container into the flow path, facilitate dispensing of the second chemical agent from the second chemical container into the flow path, or facilitate simultaneous dispensing of the first and second chemical agents from the first and second chemical containers into the flow path.
[0016] In another embodiment, a pressure washing unit is provided. The pressure washing unit can include a pressure washing body configured to receive fluid from a fluid source and pressurize the received fluid, and a lance in fluid communication with the pressure washing body. The lance can be configured to receive and selective emit fluid pressurized by the pressure washing body. The lance can include a handle including a spray trigger configured to cause the lance to emit pressurized fluid upon actuation, a barrel ending distally from the handle, and a push rod extending from the handle proximate the trigger and at least partially along a length of the barrel. The push rod can be configured to longitudinally translate relative to the handle and the barrel to selectively contact the spray trigger.
[0017] The pressure washing unit can vary in a number of ways. For example, the lance can be configured to dock on the pressure washing body. In some variations, the push rod, upon docking the lance, can be configured to translate and abut the spray trigger thereby preventing actuation of the spray trigger while the lance is docked. For example, the pressure washing unit can include an extension configured to couple to the end of the barrel, the extension being configured to receive pressurized fluid emitted by the lance and to emit the received pressurized fluid. In some variations, the push rod can extend to a distal end of the barrel, and the extension can include a second push rod configured to translate longitudinally relative to the extension. The push rod and the second push rod can align longitudinally when the extension is coupled to the barrel. In some aspects, the lance can include a slider and a linkage disposed distally of the push rod and coupled to the push rod, and docking the lance and the extension on the pressure washing body can be configured to automatically actuate the slider simultaneously translate the push rod proximally to lock the spray trigger and translate the second push rod distally to eject an accessory coupled to the extension. In some other variations, the extension can be configured to removably couple with at least one accessory configured to alter a spray pattern of the extension. The lance can include an accessory actuator configured to detach a coupled at least one accessory from the extension. The accessory actuator can translate the push rod and the second push rod to detach the at coupled at least one accessory. For example, the lance can include at least one chemical container configured to store and selectively dispense a chemical agent into a flow path of the pressurized fluid. In some variations, the at least one chemical container can include a first chemical container configured to store and selectively dispense a first chemical agent and a second chemical container configured to store and selectively dispense a second chemical agent. In some aspects, the lance can include a chemical actuator that, upon actuation, is configured to: facilitate dispensing of the first chemical agent from the first chemical container into the flow path, facilitate dispensing of the second chemical agent from the second chemical container into the flow path, or facilitate simultaneous dispensing of the first and second chemical agents from the first and second chemical containers into the flow path.
[0018] In another embodiment, a pressure washing device is provided. The pressure washing device can include a lance configured to emit pressurized fluid, and an accessory coupled to the lance. The accessory can be configured to transmit pressurized fluid emitted by the lance. The accessory can include a central flow path and a peripheral flow path. Pressurized fluid can be configured to flow through one of the central flow path and the peripheral flow path at a time.
[0019] For example, the accessory can include a shuttle disposed in the central flow path and the peripheral flow path. The shuttle can be movable between a proximal position in which the shuttle obstructs the peripheral flow path and a distal position in which the shuttle obstructs the central flow path. In some variations, the shuttle can be biased to the distal position. In other variations, the accessory can be configured to receive at least one attachment within central flow path. In some aspects, the reception of the at least one attachment can be configured to move the shuttle to the proximal position. For example, the accessory can include a first cuff rotationally disposed about central flow path. In some variations, the first cuff can include a plurality of nozzles disposed therein, each nozzle being configured to alter a spray pattern of pressurized fluid flowing through the peripheral flow path, and the first cuff can be configured to be rotatable by a user to select a given nozzle in the plurality of nozzles. In some aspects, the accessory can include a second cuff rotationally disposed about the central flow path. The first cuff and the second cuff can be independently rotatable relative to each other. In some derivations, rotation of the second cuff can be configured to rotate the peripheral flow path relative to the central flow path, and rotation of the peripheral flow path can be configured to alter an orientation of pressurized fluid emitted by the accessory. In other derivations, the second cuff can be disposed proximally of the first cuff.
[0020] In an embodiment, a pressure washing device is provided. The pressure washing device can include a lance configured to receive pressurized fluid, and a multi-nozzle coupled to the lance at a distal end thereof. The lance can include a first trigger and a second trigger. The multi-nozzle can be configured to emit the received pressurized fluid in one or more selectable spray patterns upon actuation of the first trigger. The multi-nozzle can be configured to receive an accessory. Actuation of the second trigger can be configured eject an accessory received by the multi-nozzle.
[0021] The pressure washing device can vary in a number of ways. For example, the lance can include a handle and a barrel extending distally from the handle, and the first trigger and the second trigger can be disposed on the handle. For example, the lance can include a handle, a barrel extending distally from the handle, and an extension removably coupled to a distal end of the barrel. The multi-nozzle can be coupled to a distal end of the barrel.
[0022] In another embodiment, a pressure washing guide is provided. The pressure washer guide can include a frame, an inlet coupled to the frame, and an outlet configured to emit the received pressurized fluid, The inlet can be configured to couple to a fluid outlet of a pressure washing device and receive pressurized fluid therefrom. The frame can be configured to contact a surface to be cleaned such that the outlet is disposed at a predefined distance and a predefined angle relative to the contacted surface to control emission of the received pressurized fluid onto the contacted surface. At least one of the outlet and the frame can be adjustable to alter at least one of the predefined distance and predefined angle relative to the contacted surface.
[0023] For example, the pressure washer guide can include at least one wheel configured to contact the surface to be cleaned. In some variations, the at least one wheel can include a plurality of inline wheels each configured to contact the surface to be cleaned. For example, the pressure washer guide can include a brush configured to contact the surface to be cleaned. For example, the outlet can be configured to emit the received pressurized fluid in a fan-shaped spray pattern. In some variations, the outlet can be rotatable to transform the fan-shaped spray pattern between a substantially horizontal orientation and a substantially vertical orientation. In some aspects, the pressure washer guide can include at least one wheel configured to contact the surface to be cleaned. In some derivations, the at least one wheel can define a groove therearound. The fan-shaped spray pattern can be configured to flow through the groove when the fan-shaped spray pattern is in the substantially vertical orientation. For example, the frame can include an arm, and the outlet can be rotatably attached to the arm. In some variations, the nozzle can be configured to be placed in a plurality of discrete rotational positions corresponding to predetermined emission angles relative to a contacted surface.
[0024] In another embodiment, a pressure washing device is provided. The pressure washing device can include a lance configured to emit pressurized fluid, and a surface cleaner attachment configured to couple to an end of the lance and configured to emit pressurized fluid emitted by the lance. The surface cleaner attachment can include a body and a rotatable nozzle bar disposed on an underside of the body. The rotatable nozzle bar can include one or more nozzles configured to emit the pressurized fluid toward a surface being cleaned. The one or more nozzles can be configured to cause the rotatable nozzle bar to rotate relative to the body due to the emission of the pressurized fluid. The rotatable nozzle bar can also include at least one front nozzle configured to emit pressurized fluid at a target location disposed in front of the surface cleaner attachment.
[0025] For example, the at least one front nozzle can include a first front nozzle and a second front nozzle. For example, the at least one front nozzle can be configured to emit fluid in a fan-shaped spray pattern. For example, the at least one front nozzle cam be movable between a forward position in which the at least one front nozzle is configured to target a first region and a downward position in which the at least one front nozzle is configured to target a second region closer to the body than the first region. In some variations, the surface cleaner attachment can include at least one actuator configured to selectively transform the at least one front nozzle between the forward position and the downward position. For example, the body can include a first actuator configured to selectively switch fluid supply between the rotatable nozzle bar and the at least one forward nozzle. In some variations, the body can include a second actuator configured to selectively transform the at least one front nozzle between a forward position and a downward position. For example, the rotatable nozzle bar can be configured to pivot about a middle thereof. For example, the rotatable nozzle bar can be configured to rotate about a rotational axis such that a first end of the nozzle bar beyond the rotational axis in a first direction is greater than a second end of the nozzle bar beyond the rotational axis in the second direction. For example, the pressure washing device can include a brush disposed around a circumference of the housing.
[0026] In an embodiment, a pressure washing attachment is provided. The pressure washing attachment can include a housing having a substantially round form, an inlet pivotally coupled to the housing and configured to receive a pressurized fluid, a rotatable nozzle bar disposed on an underside of the housing, and at least one front nozzle disposed on the housing and configured to emit pressurized fluid. The inlet can be configured to pivot relative to the housing about at least two distinct axes. The inlet can be configured to couple to a distal end of a pressure washing lance. The rotatable nozzle bar can have at least one nozzle configured to emit pressurized fluid.
[0027] The pressure washing attachment can vary in a number of ways. For example, the pressure washing attachment can include a plurality of wheels disposed on the housing. For example, the at least one front nozzle can be movable between a forward position in which the at least one front nozzle is configured to target a first region and a downward position in which the at least one front nozzle is configured to target a second region closer to the body than the first region. In some variations, the pressure washing attachment can include at least one actuator configured to selectively transform the at least one front nozzle between the forward position and the downward position.
[0028] In another embodiment, a pressure washing attachment is provided. The pressure washing attachment can include a housing having a substantially round form, at least one fluid inlet configured to couple to an end of a pressure washing device and receive pressurized fluid therefrom, a rotatable nozzle bar disposed on an underside of the housing, andat least one front nozzle disposed on the housing and configured to emit pressurized fluid received from a coupled end of the pressure washing device toward a target location located in front of the housing. The rotatable nozzle bar can have at least one nozzle configured to emit pressurized fluid received from a coupled end of the pressure washing device to cause the rotatable nozzle bar to rotate relative to the housing.
[0029] For example, the fluid inlet can be pivotable relative to the housing. In some variations, the fluid inlet can be configured to pivot relative to the housing about at least two axes of rotation either separately or simultaneously. For example, the pressure washing attachment can include a plurality of wheels. For example, the at least one front nozzle can be movable between a forward position in which the at least one front nozzle is configured to target a first region and a downward position in which the at least one front nozzle is configured to target a second region closer to the body than the first region. In some variations, the pressure washing device can include at least one actuator configured to selectively transform the at least one front nozzle between the forward position and the downward position. For example, the pressure washing attachment can include at least one actuator configured to selectively switch fluid supply between the rotatable nozzle bar and the at least one forward nozzle. For example, the rotatable nozzle bar can be configured to pivot about a middle thereof. For example, the rotatable nozzle bar can be configured to rotate about a rotational axis such that a first end of the nozzle bar beyond the rotational axis in a first direction is greater than a second end of the nozzle bar beyond the rotational axis in the second direction. For example, the pressure washing attachment can include a brush disposed around a circumference of the housing.
[0030] In another embodiment, a pressure washing device is provided. The pressure washing device can include a lance configured to emit pressurized fluid, and a nozzle attachment configured to removably couple to the lance. The nozzle attachment can include a fluid inlet configured to receive pressurized fluid emitted by the lance, a first fluid outlet configured to emit received pressurized fluid along a first trajectory, and a second fluid outlet configured to emit received pressurized fluid along a second trajectory different than the first trajectory. The first trajectory and the second trajectory can be offset from each other by at least 45 degrees.
[0031] For example, the lance can include a barrel defining a primary flow axis, and the first trajectory can be substantially aligned with the primary flow axis. For example, the first trajectory and the second trajectory can be offset from each other by greater than 60 degrees. In some variations, the first trajectory and the second trajectory can be offset from each other by greater than 120 degrees. In some aspects, the first trajectory and the second trajectory can be offset from each other by approximately 180 degrees. For example, at least one of the first fluid outlet and the second fluid outlet can be individually pivotable relative to the fluid inlet to adjust a respective first trajectory or second trajectory thereof. For example, the nozzle attachment can include at least one target guide configured to contact a target object disposed at an intersection of the first trajectory and the second trajectory. In some variations, the at least one target guide can include a plurality of bristles configured to contract the target object.
[0032] In another embodiment, a pressure washing device is provided. The pressure washing device can include a body configured to receive and emit pressurized fluid for use in a cleaning operation, a bleed flow path defined in the body, a plunger disposed in an inlet of the bleed flow path, and an actuator operatively coupled to the plunger. The body can define a main flow path configured to transmit the received pressurized fluid. The bleed flow path can be in fluid communication with the main flow path. The bleed flow path can be configured to receive the pressurized fluid in parallel with the main flow path. The actuator can be configured to, upon actuation, move the plunger to selectively prevent received pressurized fluid from flowing through the bleed flow path.
[0033] For example, the actuator can include a switch movable between a first position in which the bleed flow path is obstructed by the plunger and a second position in which the bleed flow path is unobstructed by the plunger. In some aspects, the first position corresponds to a normal operation of the pressure washing device and the second position corresponds to a low power operation of the pressure washing device. For example, the pressure washing device can include at least one chemical container operatively coupled to the body. The at least one chemical container can be configured to store a chemical agent for use in the cleaning operation. In some variations, the pressure washing device can include a chemical actuator configured to, upon actuation, selectively obstruct a chemical path leading from the at least one chemical container to the main flow path. In other variations, the pressure washing device can include a valve disposed in the chemical path. In some aspects, the valve can include a one-way valve configured to prevent back flow of fluid into the at least one chemical container. For example, the pressure washing device can include a hose connection point configured to removably couple with a hose, and the hose can be configured to supply the pressurized fluid to the body for emission during the cleaning operation.
[0034] In another embodiment, a method is provided. The method can include actuating a spray trigger of a pressure washing device to cause the pressure washing device to emit pressurized fluid at a first flow rate and actuating a bleed switch on the pressure washing device to cause the pressure washing device to emit the pressurized fluid at a second flow rate less than the first flow rate.
[0035] The method can vary in a number of ways. For example, actuating the spray trigger can include causing the pressurized fluid to flow through a main flow path. In some variations, actuating the bleed switch can include causing a plunger disposed in the pressure washing device to move and open a bleed flow path such that pressurized fluid flowing through the pressure washing device flows through the opened bleed flow path. For example, the method can include actuating a chemical switch on the pressure washing device to cause a chemical agent stored in a container of the pressure washing device to flow into a main flow path to mix with the pressurized fluid prior to emission.
[0036] The details of one or more variations of the subject matter described herein are set forth in the accompany drawings and the description below. Other features and advantages of the subject matter described herein will be apparent from the description and drawings, and from the claim.DESCRIPTION OF DRAWINGS
[0037] These and other features will be more readily understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
[0038] FIG. 1 is a perspective view of a person operating a pressure washing system according to an embodiment;
[0039] FIG. 2 is a perspective view of the pressure washing system of FIG. 1 in a storage mode;
[0040] FIG. 3 is a cross-sectional view of the pressure washing system of FIG. 1;
[0041] FIG. 4 is a cross-sectional divided view of the pressure washing system of FIG. 1;
[0042] FIG. 5 is a view of a rotary coupler used with the pressure washing system of FIG. 1;
[0043] FIG. 6A is a simplified diagram of a winding system for a pressure washing system according to a first variation;
[0044] FIG. 6B is a simplified diagram of a winding system for a pressure washing system according to a second variation;
[0045] FIG. 6C is a simplified diagram of a winding system for a pressure washing system according to a third variation;
[0046] FIG. 7A is a partial cross-sectional view of an offset crank for a pressure washing system according to a variation;
[0047] FIG. 7B is a side view of the offset crank of FIG. 7A;
[0048] FIG. 8 is a partial cross-sectional view of an offset crank for a pressure washing system according to another variation;
[0049] FIG. 9A is a side view of a pressure washing system with an outer shell according to some embodiments;
[0050] FIG. 9B is a cross-sectional view of the pressure washing system of FIG. 9A;
[0051] FIG. 10A is a perspective view of a lance according to an embodiment;
[0052] FIG. 10B is a cross-sectional view of the lance of FIG. 10A;
[0053] FIG. 10C is a partial cross-sectional view of a valve system of the lance of FIG. 10A;
[0054] FIG. 10D is a partial cross-sectional view of the valve system of FIG. 10C in a closed state;
[0055] FIG. 10E is a partial cross-sectional view of the valve system of FIG. 10C in an open state;
[0056] FIG. 11A is a perspective view of a lance according to an embodiment;
[0057] FIG. 11B is a partial perspective view of a valve system of the lance of FIG. 11A;
[0058] FIG. 11C is a side view of the lance of FIG. 11A;
[0059] FIG. 12A is a cross-sectional view of an extension of the lance of FIG. 11A;
[0060] FIG. 12B is a partial perspective view of the extension of FIG. 12A;
[0061] FIG. 12C is a partial perspective view of a nozzle of the lance of FIG. 11A;
[0062] FIG. 12D is a partial cross-sectional view of the extension of FIG. 12B joined with the nozzle of FIG. 12C;
[0063] FIG. 13A is a perspective view of a power washing system according to an embodiment;
[0064] FIG. 13B is a perspective view of the power washing system of FIG. 13A with a lance coupled to an extension;
[0065] FIG. 13C is a perspective view of the power washing system of FIG. 13B in a travel configuration;
[0066] FIG. 13D is a perspective view of the power washing system of FIG. 13B;
[0067] FIG. 14A is a cross-sectional view of a lance with a coupled extension and multi-nozzle according to an embodiment;
[0068] FIG. 14B is a partial size view of a variation of the lance of FIG. 14A with a coupled grip;
[0069] FIG. 15A is a partial cross-sectional view of the lance of FIG. 14A;
[0070] FIG. 15B is a partial cross-sectional view of the lance and multi-nozzle of FIG. 14A with a coupled accessory;
[0071] FIG. 16A is a partial cross-sectional view of the multi-nozzle of FIG. 15B with no coupled accessory;
[0072] FIG. 16B is a partial cross-sectional view of the multi-nozzle of FIG. 16A with a coupled accessory;
[0073] FIG. 17A is a partial perspective view of the multi-nozzle of FIG. 16A;
[0074] FIG. 17B is an end view of the multi-nozzle of FIG. 17A showing a superposition of a peripheral nozzle in a first and a second state;
[0075] FIG. 17C is a perspective cross-sectional view of the multi-nozzle of FIG. 17A;
[0076] FIG. 17D is a perspective cross-sectional view of the multi-nozzle of FIG. 17A;
[0077] FIG. 18 is a perspective view of a lance with a foldable extension according to an embodiment;
[0078] FIG. 19A is a side view of a lance with a bleed switch according to an embodiment;
[0079] FIG. 19B is a partial perspective view of the lance of FIG. 19A with the bleed switch in a first position;
[0080] FIG. 19C is a partial perspective view of the lance of FIG. 19A with the bleed switch in a second position;
[0081] FIG. 20A is a spray diagram depicting a relationship between nozzle angle and shear and normal forces;
[0082] FIG. 20B is a spray diagram depicting a relationship between nozzle angle and spray angle;
[0083] FIG. 21A is a side view of a spray guide with a nozzle in a first position according to an embodiment;
[0084] FIG. 21B is a side view of the spray guide of FIG. 21A with the nozzle in a second position;
[0085] FIG. 21C is a side view of the spray guide of FIG. 21A with the nozzle in a third position;
[0086] FIG. 22A is a perspective view of a spray guide according to another embodiment;
[0087] FIG. 22B is a front view of the spray guide of FIG. 22A;
[0088] FIG. 22C is a side view of the spray guide of FIG. 22A;
[0089] FIG. 22D is a side view of the spray guide of FIG. 22A with a nozzle having an upward trajectory;
[0090] FIG. 22E is a partial rear perspective view of the spray guide of FIG. 22A;
[0091] FIG. 23 is a perspective view of a variation of the spray guide of FIG. 22A with a rudder;
[0092] FIG. 24A is a perspective view of a surface cleaning attachment according to an embodiment;
[0093] FIG. 24B is a cross-sectional top view of the surface cleaning attachment of FIG. 24A;
[0094] FIG. 24C is a partial perspective view of front nozzles of the surface cleaning attachment of FIG. 24A in a first position;
[0095] FIG. 24D is a partial perspective view of the front nozzles of FIG. 24C in a second position;
[0096] FIG. 24E is a perspective bottom view of the surface cleaning attachment of FIG. 24A;
[0097] FIG. 24F is a partial bottom view of an offset spray bar usable with the surface cleaning attachment of FIG. 24A according to a first variation;
[0098] FIG. 24G is a partial rear perspective view of the surface cleaning attachment of FIG. 24A;
[0099] FIG. 25 is an array of a lance and attachments usable with pressure washing systems;
[0100] FIG. 26 is a diagram of a demonstration of a duospray nozzle according to an embodiment;
[0101] FIG. 27A is a partial side view of a duospray nozzle according to another embodiment;
[0102] FIG. 27B is a partial perspective view of the duospray nozzle of FIG. 27A;
[0103] FIG. 28 is a perspective view of a pressure washing system according to an embodiment;
[0104] FIG. 29 is a perspective view of the pressure washing system of FIG. 28 in an upright and a reclined position;
[0105] FIG. 30 is a perspective view of the pressure washing system of FIG. 28 in a separated position;
[0106] FIG. 31 is a partial perspective view of a nozzle usable with the pressure washing system of FIG. 28 according to a variation;
[0107] FIG. 32 is a partial perspective view of the nozzle of FIG. 31 preparing to dock with a support of the pressure washing system of FIG. 28;
[0108] FIG. 33 is a partial cross-sectional view of the nozzle and support of FIG. 32 docked together;
[0109] FIG. 34 is a perspective view of the nozzle of FIG. 28;
[0110] FIG. 35 is a cross-sectional view of the nozzle of FIG. 28;
[0111] FIG. 36 is a perspective view of a pressure washing system using the nozzle of FIG. 28;
[0112] FIG. 37 is a perspective view of a nozzle usable with the pressure washing system of FIG. 28 according to another variation;
[0113] FIG. 38 is a partial cross-sectional view of the nozzle of FIG. 37 docking with a support;
[0114] FIG. 39 is a partial cross-sectional view of the docked nozzle and support of FIG. 38;
[0115] FIG. 40 is a partial perspective view of a nozzle usable with the pressure washing system of FIG. 28 according to a further variation;
[0116] FIG. 41 is a partial perspective view of the nozzle of FIG. 40 docking with a support;
[0117] FIG. 42 is a transparent perspective view of a pump unit usable with the pressure washing system of FIG. 28;
[0118] FIG. 43 is a perspective view of the pump unit of FIG. 42 according to a variation;
[0119] FIG. 44 is a perspective view of the pump unit of FIG. 42 according to another variation;
[0120] FIG. 45 is a perspective view of the pump unit of FIG. 42 according to a further variation;
[0121] FIG. 46 is a diagram of coverage by a pressure washing system with an oscillating spray arm after two side-by-side passes, in comparison to a size of a cleaning head of the pressure washing system;
[0122] FIG. 47 is a bottom perspective view of the cleaning head of the pressure washing system of FIG. 28 according to some variations;
[0123] FIG. 48 is a perspective view of a frame of the cleaning head of FIG. 47;
[0124] FIG. 49A is a front view of an oscillating nozzle of the pressure washing system of FIG. 28 in a neutral position according to a variation;
[0125] FIG. 49B is a front view of the oscillating nozzle of FIG. 49A in a rightward state of travel;
[0126] FIG. 49C is a front view of the oscillating nozzle of FIG. 49A in a leftward state of travel;
[0127] FIG. 50 is a bottom perspective view of the cleaning head of the pressure washing system of FIG. 28 according to some variations;
[0128] FIG. 51 is a bottom view of the cleaning head of the pressure washing system of FIG. 28 showing two possible locations for an oscillating arm according to some variations.
[0129] It is noted that the drawings are not necessarily to scale. The drawings are intended to depict only typical aspects of the subject matter disclosed herein, and therefore should not be considered as limiting the scope of the disclosure.DETAILED DESCRIPTION
[0130] Certain illustrative embodiments will now be described to provide an overall understanding of the principles of the structure, function, manufacture, and use of the devices and methods disclosed herein. One or more examples of these embodiments are illustrated in the accompanying drawings. Those skilled in the art will understand that the devices and methods specifically described herein and illustrated in the accompanying drawings are non-limiting illustrative embodiments and that the scope of the present utility model is defined solely by the claims. The features illustrated or described in connection with one illustrative embodiment may be combined with the features of other embodiments. Such modifications and variations are intended to be included within the scope of the present utility model.
[0131] Further, in the present disclosure, like-named components of the embodiments generally have similar features, and thus within a particular embodiment each feature of each like-named component is not necessarily fully elaborated upon. Additionally, to the extent that linear or circular dimensions are used in the description of the disclosed systems, devices, and methods, such dimensions are not intended to limit the types of shapes that can be used in conjunction with such systems, devices, and methods. A person skilled in the art will recognize that an equivalent to such linear and circular dimensions can easily be determined for any geometric shape.
[0132] Traditional pressure washers often contend with a tradeoff between ease-of-use and power. Pressure washers that are maneuverable and convenient to handle tend to be less powerful, while more powerful pressure washers tend to be cumbersome and bulky. Pressure washers are generally provided featuring a hose and a power cord, and the described pressure washers include management features to conveniently store and handle both the hose and power cord. Further, the management features are arranged in view of onboard motors and regulators in a manner meant to make the pressure washers more compact and easier to maneuver as a whole, even with a hose and power cord.
[0133] Also described herein are accessories and attachments usable with pressure devices generally, including those devices described herein. The accessories and attachments provide pressure washer users with greater flexibility to clean a variety of surfaces having a variety of geometries and soiled by a variety of dirt and / or debris, or the natural growth of various amounts or types of organic materials such as mildew.
[0134] FIGs. 1 and 2 depict a pressure washing system 10 according to an embodiment. The pressure washing system 10 provides a balance between ease-of-use and power, as described above. For example, in a use mode, seen in FIG. 1, the pressure washing system 10 can be placed near a user 5 while they operate the pressure washing system 10 to clean a surface. In a transport mode, seen in FIG. 2, the pressure washing system 10 can be stowed and moved to a more upright orientation and can be wheeled around by a user as desired, or stowed as-is to conserve space.
[0135] The pressure washing system 10 can vary in form, but it generally includes a pressure washing body 12 fluidly coupled to a lance 14 via a hose 16. The pressure washing body 12 can include a frame 18 to support a rotatable drum 20 about which the hose 16 can be wound. In use, a user can unwind the hose 16 through general movement of the lance 14, i.e., walking away from the pressure washing body 12 can tension the hose 16 and cause it to unwind, or via a crank 22 disposed on a side of the pressure washing body 12. The crank 22 can be manually turned to rotate the drum 20, thereby winding and unwinding the hose 16 as desired. As will be described in greater detail below, the operational components of the pressure washing system 10, such as the motor and the pump, can be disposed internally within the drum 20. When the drum 20 is rotated by a user to wind and unwind the hose 16, the internal components can remain stationary and properly connected to both power and fluid sources.
[0136] In addition to these components, and as better shown in FIG. 2, the pressure washing system 10 can include a plurality of wheels 23 and / or legs 24 upon which the pressure washing system 10 can be placed when in the upright position. The lance 14 can be attached to a side of the pressure washing body 12 and separated from an optional extension 26. Both the lance 14 and the extension 26 will be described in greater detail below. When placed on the pressure washing body 12, the lance 14 can serve as a handle by which the pressure washing system 10 can be toted around by a user. This, too, will be described in detail below. In some variations, the pressure washing system 10 can include a separate handle, akin to a suitcase, by which the pressure washing system 10 can be moved. Again, this will be described in greater detail below.
[0137] Turning now to FIGs. 3-5, the inner mechanisms of the pressure washing system 10 according to some variations is depicted. As introduced above, the pressure washing body 12 generally includes a frame 18 and a rotatable drum 20 that defines an internal cavity to house both a motor 28 and a pump 30. The rotatable drum 20 can be set on drum bearings 32, located on either end of the drum 20, while the motor 28 and pump 30 can be coupled to the frame 18. When the drum 20 is rotated, the drum bearings 32 allow the drum 20 to rotate while all the other components of the pressure washing system 10 remain still. This arrangement can be seen especially in FIGs. 3 and 4.
[0138] The drum 20 can optionally include a hose guide 34 disposed thereon, which defines a plurality of channels to seat the hose 16. Further, for electrical power, the pressure washing system 10 can include a power cord (not pictured) , which can be wound around a power cord reel 36 located on the pressure washing body 12. The power cord reel 36 can be wound automatically or manually as will be described below. The pressure washing system 10 can also include a carrying handle 18A by which the pressure washing body 12 can be held and maneuvered. In variations that include a suitcase-style handle, this handle can be supported by a handle frame having its own frame legs upon which the pressure washing system 10 can rest when placed in a horizontal orientation, such as during use.
[0139] FIG. 4 depicts the internal components of the pressure washing system 10 in greater detail and will be described in conjunction with FIG. 3. Fluid can be received via a pump inlet 38 located on the pressure washing body 12. As depicted, the pump inlet 38 is located in line with a rotational axis of the drum 20, as this region can remain stationary while the drum 20 is rotated. A user can connect a garden hose (not pictured) or the like to the pump inlet 38 via any typical connector, (e.g., threading, quick connect, etc. ) to introduce water to the pressure washing system 10. Water received via the pump inlet 38 can be drawn to the pump 30 and expelled out a pump outlet 40. The pump outlet 40 can direct fluid ultimately to a rotary coupler 42, which can bridge the gap between the stationary pump and the rotating drum 20, which supports the hose 16. Depending on the angular position of the drum 20, the actual connection point to the hose 16 may change. The rotary coupler 42, seen in isolation in FIG. 5, allows for a fluid connection between the pump outlet 40 and the hose 16 no matter the angular position of the drum 20.
[0140] With reference to FIG. 5, the rotary coupler 42 can generally include a cuff 44 attached to a rotatory outlet 46. The cuff 44 can be rotatably coupled to the pump inlet 38 and part of the pump outlet 40, which, as seen in FIG. 4, can be concentrically disposed about each other. Internally, the rotary coupler 42 can include one or more seals 48, such as o-rings, to ensure fluid does not leak through this rotary coupler 42. When fluid leaves the rotary coupler 42, it can flow to the hose 16, which is generally anchored to the drum 20 via some kind of fluid connection. From the hose 16, the fluid can flow to the lance 14, where it is ultimately sprayed out under pressure toward a surface for cleaning.
[0141] As explained above, the pressure washing system 10 can include a power cord and a hose, each of which can be wound about some portion of the pressure washing body 12. This winding and unwinding of the power cord and hose can occur in a number of ways, including manually via a crank or the like, or automatically via a spring or the like. FIGs. 6A-6C detail several of variations for winding mechanisms for both a power cord and hose, each of which is applicable to any power washing system described herein.
[0142] FIG. 6A depicts a first variation of a pressure washing system 10′ in which a power cord 12′ is wound around a power cord reel 14′ torqued via a flat coil spring 16′ and a hose 18′ is wound manually via a crank 20′. When the power cord 12′ is pulled out of the pressure washing system 10′, the flat coil spring 16′ can tension the power cord reel to drive it rotationally, thereby winding the power cord 12′. The flat coil spring 16′ and power cord reel 14′ can be configured to stop at certain points so that the power cord reel is not always under tension, such as via a yoyo mechanism. When a user gives the power cord 12′ a quick tug, or activating a release of the flat coil spring 16′ can wind the power cord reel 14′ to draw in the power cord 12′.
[0143] FIG. 6B depicts a second variation in which both the power cord 12′ and the hose 18′ can be wound via respective first and second flat coil springs 16A′, 16B′ or equivalent tensioner. Each flat coil spring 16A′, 16B′ can automatically wind the power cord 12′ and hose 18′.
[0144] FIG. 6C depicts a third variation in which the power cord 12′ can be wound via a flat coil spring 16′, and the hose 18′can be optionally wound via the flat coil spring 16′ or a crank 20′, depending on what a user desires. In this variation, the power cord reel 14′ can be selectively coupled to a drum 22′ supporting the hose 18′ via a button 24′ or the like. When the power cord reel 14′ is coupled to the drum 22′, torque supplied by the flat coil spring 16′ can simultaneously wind both the power cord 12′ and the hose 18′. When the power cord reel 14′ is not coupled to the drum 22′, the crank 20′ can be used to manually wind the hose 18′.
[0145] In addition to the cranks and handles described above, other variations are contemplated herein, including variations with combinations of the flat coil springs and / or cranks. Further, with respect to FIGs. 7A-8, which depict a belt-driving crank 52 or gear-driving crank, and an offset crank 62. These variations can be adjusted to have different gears and gear ratios, which may decrease the amount of effort required by a user to wind and unwind a hose and / or a power cord.
[0146] With reference to FIGs. 7A and 7B, depicted is a power washing system 50 with a belt-driving crank 52. As depicted, the belt-driving crank is coupled to a drive gear 55A, which, in turn, is coupled to a driven gear 55B via a belt 56. The driven gear 55B is coaxial with a driveshaft 58 such that as the driven gear 55B rotates the driveshaft 58, and the drum 59 coupled to the driveshaft 58 also rotates. For a gear-driven variation, one or more gears can be used instead of belt 56 to mechanically link the drive gear 55A and the driven gear 55B, or the drive gear 55A and driven gear 55B can be directly coupled.
[0147] With reference to FIG. 8, depicted is a variation of a power washing system 60 with an offset crank 62. As depicted in the partial cross-section, the offset crank 62 can include a handle 64 and a crankshaft 66 connected to a drive gear 65A. The drive gear 65A can mesh with an internal driven gear 65B that is configured to rotate with the rotational drum 69.
[0148] The pressure washing systems can vary in other ways. For example, as depicted in FIGs. 9A and 9B, a pressure washing system 70 with a shell 72 is depicted. The shell 72 can cover the drum and hose (not pictured) , to ensure the hose does not slip or become tangled. A hose outlet 74 can be located on the pressure washing system 70, and can be aligned to feed the hose therefrom such that the hose exits the pressure washing system 70 approximately tangential to a curvature of the drum, aligned with vector A, for ease of access and to minimize stress on the hose.
[0149] As introduced above, the pressure washing systems described herein can include a sprayer, such as a lance, which an operator can hold during operation of the pressure washing systems. The lance can be maneuvered and aimed to target areas to be washed by the pressure washing systems, including to selectively apply cleaning agents, chemicals, and other fluids to various surfaces. These sprayers and lances can vary but typically can include a chemical container mounted to the end of a lance as an accessory, or the container can be built into the pressure washer body such that the chemical contained in the container can flow through the hose to the lance. Several exemplary variations are described herein. Any variation can be substituted for another and can be used with any pressure washing system described herein. Further, any feature of any variation can be used with any combination or sub-combination of other features described herein according to methods and implementations known to persons of ordinary skill in the art.
[0150] Variations of lances are depicted especially in FIGs. 10A-19B. For example, a first variation of a lance 100 with a removable chemical container 106 is depicted in FIGs. 10A-10E. The lance 100, as explained, is compatible with any pressure washing system described herein, including the pressure washing system 10 of FIG. 1 and its variants, for example. The specific form of the lance 100 can vary, but as depicted, the lance 100 generally includes a handle 102, a barrel 104 extending from the handle 102, and a chemical container 106 attached to the handle 102. The handle 102 can extend at an oblique angle relative to the barrel 104, similar to the handle of a firearm, to provide increased ergonomic support for a user during handling. The handle 102 can also include a spray trigger 107 in a center thereof, and an optional trigger guard 111 can extend forward of the spray trigger 107. A bottom of the handle 102 can include a conduit connection point in the form of a hose connector 112. A hose of a pressure washing system, such as the hose 16 of the pressure washing system 10, can connect to the hose connector 112, and a base fluid, such as water, can be supplied to the lance 100 via the connected hose 16. A hose can attach to the hose connector 112 in a number of ways, including via threads, a bayonet system, a quick-connect, a magnetic coupling, or any other coupling or combination thereof. Additionally, in some variations, the hose can be permanently affixed to the hose connector 112 such that it is not removable. As depicted, an affixed hose can be disconnected from the hose connector 112 via a hose button 114 located on a base of the handle 102.
[0151] The barrel 104, as introduced, extends out from the handle 102. The barrel 104 generally can have an elongate and substantially cylindrical form, as depicted. A central tube or lumen 108 can be disposed within the barrel 104 and can form a fluid pathway through which fluid can travel. The fluid can travel the lumen 108 and be emitted via a nozzle 110 of the barrel 104 located at an end thereof. The cross-section of FIG. 10B depicts the lumen 108 in greater detail. As depicted, the lumen 108 is in fluid communication with both the hose connector 112 and the chemical tank 106 to provide a pathway through the lance 100. The nozzle 110 can take on various forms. For example, the nozzle 110 can be either fixed or removable. In either case, the nozzle 110 can be designed to create a spray pattern as desired, which can provide greater flexibility for the lance 100 for cleaning. For soap coming from a tank in a pressure washer body, or from a tank on the lance, certain spray patterns may be more appropriate for certain types of dirt and / or surface materials. These patterns can include straight jets, conical patterns, fan tips of various angles, oscillating nozzles, turbo nozzles, and more. Examples of nozzles are depicted herein. When the nozzle 110 is fixed, a user may be limited to the spray pattern (s) of that fixed nozzle. When the nozzle 110 is removable, a user can swap out the nozzle 110 for another as desired. Nozzles compatible with the lance 100 and with the pressure washing systems described herein are described in greater detail below.
[0152] The chemical tank 106, as shown, is located a top region of the lance 100 above handle 102, but its location can vary. For example, the chemical tank 106 can be located under the barrel 104, within the handle 102, disposed on a rear of the lance 100, or the chemical tank can be located remote of the lance 100 entirely. So long as the chemical tank 106 is in fluid communication with the nozzle 110, chemical agents stored within the chemical tank 106 can be sourced by the pressure washing systems during a cleaning operation. Nevertheless, reference is made to the chemical tank 106 as shown for clarity. A chemical agent stored within the chemical tank 106 can be selectively sourced during a cleaning operation. Upon release, the stored chemical agent can flow from the chemical tank 106, drawn by fluid flow through the lumen 108, such that the chemical agent mixes with the flowing fluid and is emitted by the nozzle 110 of the lance 100.
[0153] Various switch and valve systems can be utilized to selectively release the chemical agent. An exemplary switch 115 and valve system 116 can be seen in FIGs. 10B-10E. The switch 115 is shown located on a portion of the handle 102 forward of the chemical tank 106. This location provides for ease of manipulation by a user. When the chemical agent is required, a user can adjust the switch 115 to a state in which chemical agent is permitted to flow. When the chemical agent is not required, the user can adjust the switch 115 to a state in which chemical agent is prevented from flowing. FIG. 10C depicts the switch 115 in greater detail, while FIGs. 10D and 10E depict an exemplary valve system 116 in greater detail in respective closed and open states. The switch 115 can be actuated via rotation, but any other means of actuation can be used. Further, any other actuator can be used, including levers, slides, electronic systems, solenoids, etc. The same goes for the valve system 116, which can be any system capable of providing for selective flow of the chemical agent from the chemical tank 106. As depicted, the valve system 116 includes a kind of ball valve, which prevents back flow of the chemical agent and / or another fluid, such as water, into the chemical tank 106 from an exterior thereof. The valve system 116, seen in FIG. 10D, is in a closed state because the ball blocks access to the lumen 108 by a chemical agent, while the valve system 116, seen in FIG. 10E, is in an open state because the ball permits access to the lumen 108 by a chemical agent.
[0154] During operation of a pressure washing systems incorporating the lance 100, a user can hold the lance 100 via the handle 102 and the barrel 104, aim the nozzle 110 of the barrel 104 toward a target located on a surface, and actuate the spray trigger 107 to cause the lance 100 to emit one or more cleaning fluids toward the target. An example is depicted previously in FIG. 1, which shows the user 5 holding the lance 14 (which could be any lance described herein, including lance 100) and spraying fluid. Depending on the state of the switch 115, the emitted fluid may be a base fluid, such as water, and / or the fluid contents of the chemical tank 106.
[0155] A second variation of the lance 100, called lance 200, is depicted in FIGs. 11A-11C. The lance 200 is similar in many ways to the lance 100, and for brevity, like components will not be described in detail. Where the lance 100 has a single chemical tank 106, the lance 200 includes two chemical tanks 206A, 206B, which, as depicted, can be located side-by-side. Each of the two chemical tanks 206A, 206B can store a separate cleaning agent or the like, as introduced above, and the stored agents can be selectively applied to a surface individually and / or in unison. The lance 200 includes a switch 214, shown located in front of both the chemical tanks 206A, 206B. A user can place the switch 214 into one of several positions corresponding to either one of the chemical tanks 206A, 206B only or neither chemical tank 206A, 206B. In some variations, the lance 200 can include a combination switch 214, which, when actuated, causes chemical agent to flow from both chemical tanks 206A, 206B simultaneously. In these variations, both chemicals may have the same or different mix ratios, depending on the feed rates from each chemical tank 206A, 206B. The feed rates may be controlled by restrictions in the chemical tanks 206A, 206B feed lines, varying the chemical viscosity, or any other method known to those skilled in the art, in order to achieve a proper mix ratio between the stored chemical agents. In other variations, the role of the combination switch 214 can be handled by the switch 214 as another setting option.
[0156] In addition to the combination switch 214, the lance 200 can feature an accessory release switch 218. As introduced above, lances generally can come equipped with accessories such as removable nozzles. For convenience, such lances, such as lance 200, can include an accessory release switch in the form of a pull ring 218 or equivalent feature which, when actuated, causes a coupled accessory to eject from the lance 200. As shown in FIG. 11C, an accessory 220 is attached to the lance 200. Actuation of the accessory release switch 218 can cause the accessory 220 to be decoupled from the lance 200. More detail is provided below. The extension 26 of FIG. 2 can also facilitate ease of storage and transportation, as also discussed below.
[0157] Reference is now made to the lance 200 as a general stand-in for any lance described herein. The lance 200, as depicted in FIG. 11A, can be coupled to an extension 330 (interchangeable with extension 26) . With reference to FIGs. 11C and 12A, the extension 330 can couple to an end of a barrel 204 proximate a nozzle 210, and it can provide a longer and more robust lance, which releases high pressure water closer to the surface to be cleaned without requiring the user to bend over in the case of floor cleaning. A longer lance can allow a user to grip the lance 200 at a handle and further down the barrel 204 or even the extension 330 itself to increase leverage during a cleaning operation while making it difficult for the user to reach the end of the extension 330. This makes it safer, as it is difficult to operate the main trigger switch in the lance 200 while simultaneously reaching for the end of the extension 330, thereby keeping the user safe from the high-pressure fluid stream emitted by the lance 200.
[0158] The extension 330 can be coupled to the lance 200 in a number of ways, including via threads, latches, bayonets, and quick connect systems. Lance 200 can include a keyway 336, which can receive a corresponding key 338 from the extension 330, as seen in FIGs. 12B and 12C. Also included in the extension 330 is a first push rod 332, which extends through the extension 330. The first push rod 332 lines up with a corresponding second push rod 334 via linkage 340 in the lance 200 (seen in FIG. 12D) to enable actions occurring in the lance 300 to be carried out at a far end of the extension 330 through, for example, longitudinal translation. These actions can vary and can include a trigger lock, a simple decoupling of an accessory, etc. These actions will be described in greater detail below. The keyway 336 ensures that the lance 200 with second push rod 334 and the extension 330 with first push rod 332 are properly aligned when coupled together so that the first push rod 332 and second push rod 334 are aligned properly to effect the actions. Keying also keeps the extension 330 from rotating relative to the lance 200 while in use. The extension 330 can also include one or more actuators to decouple the extension as desired.
[0159] FIG. 12D depicts cross-sectional views of both the extension 330 and the lance 200 aligned with each other about respective longitudinal axes. There are several common systems to couple the components can be included, including threads, snap fits, etc. As also shown in FIG. 12D, both the extension 330 and the lance 200 depict the first and second push rods 310, 312, which align when the extension 330 and the lance 200 are coupled. Also shown is the linkage 340, which can translate proximal translational movement of the second push rod 334 into distal translational movement of the first push rod 332, or vice versa. Push rods and their function will be described in greater detail below.
[0160] The pressure washing systems described herein can be designed to switch between modes convenient for storage, transport and usage. Additionally, these systems can also be designed to enable a user to quickly equip and unequip an extension (e.g., extension 330) from a lance. Further, they can also be designed such that the lance, which affixed to the pressure washer body, can operate as a handle to improve maneuverability of the entire pressure washing system. An example of these features is depicted in the series shown in FIGs. 13A-13D, which generally depict the coupling and decoupling of the lance to an extension and to the pressure washer body as the pressure washing system is transformed between a storage mode, a transport mode, and back again.
[0161] For example, as shown in FIG. 13A, a pressure washing system 400 (interchangeable with pressure washing system 10 or any other pressure washer system described herein) is depicted including a pressure washing body 402 with an extension 404, and a lance 406, each coupled to the pressure washing body 402. The pressure washing system 400 is shown in an upright storage mode supported on wheels 408 and legs 410. This position can be useful for storage as the pressure washing system 400 takes up a smaller footprint than other systems which may lay more horizontally. The described systems and features thereof are not limited to these FIGs. 13A-13D specifically, and, for example, the lance 406 can be swapped for any other given lance described herein. The same goes for other components of the depicted pressure washing system 400.
[0162] FIG. 13B depicts the lance 406 being removed from its original position and coupled to the extension 404. In this position, the pressure washing system 400 enters a transport mode in which the pressure washing system 400 can be led around and maneuvered by a user using the lance 406 as a handle for convenience, seen in FIG. 13C. When ready, a user can move from the transport mode to a use mode by ejecting the lance 406 and the extension 404. When coupled, the two components, lance 406 and extension 404, can be removed from the pressure washing body 402 together as to arrive at a state similar to that shown in FIG. 1 with respect to pressure washing system 10. A user can actuate some feature, such as a lift away button to decouple the lance 406 and extension 404. When a user has completed their cleaning, the coupled lance 406 and extension 404 can be placed back on the pressure washing body 402, extension 404 first, as shown in FIG. 13B. Upon insertion of the extension 404, the extension 404 can automatically recouple to the pressure washing body 402. FIG. 13D depicts the lance 406 being decoupled from the extension 404 and stowed back on the pressure washing body 402 to reenter a storage mode following breakdown.
[0163] These pressure washing systems can also vary in for such that the transport mode may look differently depending upon the overall design and features of the pressure washing systems themselves. For example, in another transport mode for a pressure washing system, a traditional suitcase-style handle can be used instead. Such pressure washing systems can include a handle extending laterally relative to their respective pressure washing bodies so that the systems can be tipped upright, like the pressure washing system 400, and the suitcase-style handle can be extended relative to the body for maneuvering, akin to a suitcase. A lance can remain fully docked on the pressure washer body during transportation. The handle can be extended and gripped by a user who can then wheel around the pressure washing system as needed.
[0164] As introduced above, push rods can be one way in which a pressure washing system performs certain actions, including a trigger lock and a simple accessory decoupler. These actions are described in greater detail with reference to FIGs. 14A-14B for the trigger lock and FIGs. 15A-15B for the accessory decoupler.
[0165] When a lance is used as a transportation arm, such as in the transport modes described above, there is a risk a user can accidentally acuate the spray trigger on the lance while toting around the pressure washing system. Premature actuation of a lance is not desirable, and high pressure fluids can cause damage or harm to the user and / or to various surfaces. A feature such as an auto trigger lock operates to safely secure the trigger and prevent premature actuation until a user has removed the lance and extension from the pressure washer body and is actually ready to operate the lance for cleaning purposes. When the lance is coupled to a pressure washing body, for example, the auto trigger lock can automatically prevent actuation of the spray trigger without any additional user intervention. This auto trigger lock can be used in conjunction with a separate trigger lock on the lance, which can be selectively actuated by a user while they are operating the lance.
[0166] FIG. 14A depicts an exemplary lance 500, which includes a push rod 530 that operates as an auto trigger lock when the lance 500 is coupled to a pressure washing body (e.g., pressure washing body 12) . The lance 500 can be substituted for any lance described herein, including the lances 100, 200, etc. described above. As depicted, the lance 500 includes features nearly identical to those of lances described previously, and for brevity, those features will not be described again.
[0167] As depicted, the lance 500 is coupled to an extension 501. A push rod 530 runs through the lance 500 and extends between the barrel 504 and the handle 502 all the way to the trigger 506. As depicted below, the push rod 530 can also join with a push rod in the extension 501, similar to the joinder depicted with respect to FIGs. 12A-12D. The push rod 530 is configured to slide longitudinally within the lance 500. When the push rod 530 slides rearward toward the handle 502, the push rod 530 can abut the trigger 506 so that it is unable to pivot forward and actuate spray of the lance 500.
[0168] The push rod 530 can be slid rearward upon coupling to the pressure washing body and / or to the extension 501. For example, as depicted, the extension 501 can include a detent 508 thereon. When the extension 501 is coupled to the pressure washing body, the detent 508 can be pressed. This press can cause the push rod 530 to be slid rearward, thereby blocking actuation of the trigger 506, or at least creating significant resistance for a user and preventing spray. When the lance 500 and the extension 501 are removed from the pressure washing body, such as when a user transitions from a transport mode to a usage mode, the detent 508 is no longer pressed, and the resistance applied to the trigger 506 by the push rod 530 becomes virtually nonexistent. In some variations, the extension 501 and / or the lance 500 can include a spring or other similar mechanism to bias the push rod 530 to a neutral position so that it no longer abuts blocks the trigger 506.
[0169] As also depicted, the push rod 530 can include protrusion 532 extending therefrom in addition to or in place of detent 508. This protrusion 532 can operate similarly to the detent 508 in that, upon coupling the lance 500 to a pressure washing body, the protrusion 532 causes the push rod 530 to slide rearward to abut the spray trigger 506 to prevent actuation. As seen in FIG. 14B, an optional grip 510 can be disposed around a portion of the barrel 504 from which the protrusion 532 extends. A user can actuate the push rod 530 manually by moving this grip 510.
[0170] As introduced previously, accessories can be used with the pressure washing systems, which can alter spray emitted by the lance. These alterations my be more beneficial for certain types of cleaning than others, and a user can swap out accessories as needed to expand the kinds of cleaning they can accomplish with a single pressure washing system. Often, these accessories are coupled to an end of a lance barrel, and they must be secured properly to channel and shape the high-pressure fluid flows encountered during operation of the pressure washing system. What’s more, the fact that the accessories are often coupled to the outlet of the lance means a user may have to use extra care when coupling or decoupling an accessory to ensure they do not spray themselves, potentially causing harm. To address this challenge, the pressure washing systems here can come quipped with a quick release mechanism to easily detach coupled accessories.
[0171] In addition to or in place of a trigger lock, the lance 500 can also feature a quick release mechanism as depicted in FIG. 15A, which can be used to quickly and easily eject an accessory coupled to an end of the extension 501 via actuation passed from the handle 502 through the push rod 530 to the accessory. This quick release mechanism will be elaborated on later with respect to specific nozzle designs. The quick release mechanism can be part of any lance described herein. The lance 500 is provided as a cross-sectional view to highlight the inner mechanism, the push rod 530, which, as explained above, can be used additionally to set a trigger lock. The push rod 530 facilitates the quick release of an attached accessory 516. As depicted, the lance 500 is coupled to an extension 501, which includes a nozzle 600 attached thereto. The nozzle 600 can be designed to receive and couple with a plurality of accessories, and it will be described in greater detail below. For example, these accessories can change spray patterns and types for varied cleaning.
[0172] This action can also occur through a push rod 530. In some variations, only the trigger lock or the quick release mechanism are included in a given lance. In other variations, each action can be included in a lance through either separate push rods or the same push rod. In the variation depicted herein with reference to the lance 500 of FIG. 15A et seq., the latter is true. The push rod 530 can be associated with both a trigger lock, as described previously, as well as a quick release mechanism for coupled accessories. Actuation of the push rod 530 can therefore simultaneously eject a coupled accessory and lock a spray trigger of the lance 500 to prevent it from being prematurely oraccidentally actuated.
[0173] As depicted in FIG. 15A, the lance 500 includes the push rod 530, which is coupled to the barrel 504 on an outer side thereof, and the push rod 530 can be slid relative to the barrel 504 at least partially along its length. Extending from the push rod 530 and toward a handle 502 of the lance 500 is an auto lock portion of the push rod 530, as explained above, which can engage with a spray trigger 506 as described above. Also extending from the push rod 530 but toward the extension 501 and nozzle 600 is a linkage 518. The linkage 518 can translate rearward movement of the slider into forward movement of the extension push rod 534. At a distal end of the push rod 534 is a ramp feature 538, similar to the ramp features described herein. The ramp feature 538 can engage a locking wire 536 in the nozzle 600 such that when the push rod 530 is moved proximally, the linkage 518 translates proximal movement of the push rod 530 to distal movement of the extension push rod 534, which moves the ramp feature 538 distally as well. The ramp feature 538 can splay the locking wire 536 radially outward, causing it to disengage from a coupled accessory. A spring 602 located in the nozzle 600, previously biased by the locking wire 536, can be released to cause the accessory 516 to be ejected from its engagement with the nozzle 600 via this disengagement with the locking wire 536. Through this system, the auto trigger lock and the quick release mechanism are combined in a single action. This interaction is described in more detail with respect to FIG. 15B.
[0174] The exact mechanism for the quick release of the accessory 516 can vary. But as depicted, a user can pull a pull ring (e.g., pull ring 218 of lance 200) , actuate a button, slide a grip 510 or protrusion 532, or other take other actions to cause the push rod 530 to move in a rearward direction toward the handle 502. A linkage 518 can transform the pull of the push rod 530 into a pushing motion toward the accessory 516. In some variations, the pull ring, slider, or other feature, can be biased to an unreleased position such that when a user is not pulling on the pull ring, the pull ring is biased forward opposite the direction of the pull.
[0175] An attached accessory with the nozzle 600 can be seen in greater detail in FIG. 15B. The nozzle 600 is a kind of multi-nozzle with a rotational body 604 used to select different spray modes via a plurality of spray outlets 606 and to automatically facilitate fluid flow to any coupled accessories. This rotational body 604 is described in greater detail below. Generally, the nozzle 600 can include a central flow path 608 through which fluid can flow. Within the flow path 608 can be a sliding shuttle 610, which can be biased distally within the central flow path via the spring 602. As depicted, an accessory 516 can be coupled to the nozzle 600 through insertion into the central flow path 608. The insertion of the accessory 516 moves the sliding shuttle 610 distally against the force of the spring 602, and the inserted accessory 516 can be secured in place against the force of the spring 602 via the locking wire 536, which engages a peripheral groove 517 in the accessory 516. The extension push rod 534 runs through the extension 501 in combination with the push rod 530 running through the lance 500 via their aligned joinder, similar to the joinder described above with respect to FIG. 12D. As depicted, the ramp feature 538 is positioned such that distal movement of the ramp feature 538 via the extension push rod 534 causes the locking wire 536 to splay radially outward and disengage from the groove 517. This radially splaying overcomes tension suppled by the locking wire spring 540, which maintains the locking wire 536 in a radially-inward position such that it can engage any coupled accessory. Through this interaction, a user can actuate some input at the lance 500, the action can travel the length of the lance 500 and extension 501 via the push rod 530 and extension push rod 534 to cause the locking wire 536 to splay outward, thereby freeing the spring 602 to eject the coupled accessory 516.
[0176] FIGs. 16A-16B depict additional features of the nozzle 600 in greater detail independent of the nozzle’s 600 ability to eject coupled accessories. In addition to the features described above, the nozzle 600 generally includes a central flow path 608, and a peripheral flow path 612, and fluid can flow through either flow path 608, 612 to be emitted by the nozzle 600 or through the accessory 516.
[0177] As introduced above, the central flow path 608 includes a spring-loaded inline shuttle 610, which can slide within the central flow path 608 proximally and distally, depending upon the operation of the nozzle 600. When no accessory is equipped to the nozzle 600, the shuttle 610 can be biased distally and can block off the central flow path 608 to prevent fluid flow therethrough. This is shown in FIG. 16A. Fluid flowing through the nozzle 600 can instead be routed to the peripheral flow path 612 and through the selected spray outlet 606. When the accessory 516 is equipped, the shuttle 610 can be biased inward against the spring 602, simultaneously blocking the peripheral flow path 612 and allowing fluid to flow through the central flow path 608 as seen in FIG. 16B. The view in FIG. 16B can be a similar view to the view of FIG. 15A but taken from another cross-sectional perspective, such as one rotated approximately 90 degrees relative to a central longitudinal axis of the nozzle 600.
[0178] As introduced, and seen in FIG. 17A, the rotational body 604 can seat several spray outlets, including the selected spray outlet 606. The spray outlets 606 can cause different spray patterns, including differently-angled spray emissions, jet nozzles, foaming nozzles, etc. Such angles can vary as needed, and can include spray angles of about 0, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 75, 90 or more degrees, as well as nozzles that adjust a size of an opening to allow for higher fluid flow at lower energy levels, such as for soap or rinsing. When a user desires a change, the rotational body 604 can be rotated relative to the rest of the nozzle 600. The newly-selected spray outlet 606 can become fluidly coupled to the peripheral flow path 612 under the force of a spring-biased face 614, and operations can continue as desired.
[0179] In addition to the internal mechanisms described above, the nozzle 600 also features a secondary rotational body 616 disposed proximally of the rotational body 604. Each rotational body 604, 616 can be rotated relative to the rest of the nozzle 600 and to each other, and each rotational body 604, 616 is tied to the selection of a certain variable feature of the nozzle 600. As explained above, the rotational body 604 can be rotated to select from a plurality of spray outlets 606. Similarly, the secondary rotational body 616 can be rotated to maneuver the peripheral flow path 612 relative to the central flow path 608. As seen in FIG. 17B, the peripheral flow path 612 can be in one of several positions. Two positions are shown, each being a 90-degree rotation of the other, but more positions are possible. The two positions are meant to illustrate possible positions the peripheral flow path 612 can occupy when the secondary rotational body 616 is manipulated, and each position cannot be occupied at the same time.
[0180] Normally, the peripheral flow path 612 causes fluid to be emitted from the nozzle such that it generally occupies a single plane as a fan-shaped spray. This can vary, of course, but for pressure washing, a fan-shaped spray can be useful to balance spray power with area of coverage. When the secondary rotational body 616 is rotated to cause the peripheral flow path 612 to rotate 90 degrees, the plane of spray emitted by the peripheral flow path 612 is also rotated 90 degrees. In this way, the emitted plane can transition between a relatively vertical orientation and a relatively horizontal orientation. A user can then rotate the rotational body 604 to select a spray outlet 606 to further adjust the spray. The FIGs. 17C and 17D depict the relative rotation of the secondary rotational body 616 without extraneous features of the nozzle 600 present, in order to highlight the transition.
[0181] Another lance variation is depicted in FIG. 18. As shown, the lance 700 includes a foldable extension 702 rather than a removable extension as described herein. Instead of coupling and decoupling the extension 702, a user can fold and unfold the extension relative to a barrel 804. Operationally, the results can be the same. This variation of the lance 700 provides an alternative arrangement, which can be used with any of the lances described herein.
[0182] Lances described herein can include additional features. For example, FIGS. 19A-19C depict a lance 800 with a bleed switch 810 and a chemical switch 808. Generally, there are a few ways to vary the power of a pressure washing system. First is to adjust an area a flow path in the system. All else equal, a greater area would lead to a pressure drop while a smaller area would lead to a pressure increase. Second, motor power can be adjusted to increase or decrease pump output. Third, some form of spray blocking can be implemented to create obstacles for fluid flowing through the pressure washing system. These variations can all be effective, but they may be impractical when a user is seeking quick and simple adjustments to the power of the system. The bleed switch 810 depicted in FIGs. 19B-19C offers a quick and simple adjustment to adjust power.
[0183] FIG. 19A depicts a lance 800 which can be similar to lance 100 or other lances described herein. The lance 800 generally includes a handle 802, the barrel 804, and a chemical container 806. The lance 800 includes a spray trigger 807 to cause the lance to spray fluid, a chemical switch 808, which can facilitate the flow of one or more stored chemicals from the chemical container 806 into a flow path to mix with a base fluid, such as water, and to be emitted from the lance 800. The lance 800 can also include a bleed switch 810.
[0184] FIGs. 19B-19C depict the inner mechanisms of the lance 800 that relate to the chemical switch 808. When actuated, the chemical switch 808 can cause an internal valve (not shown) to be moved to permit flow. As also shown, the bleed switch 810 is coupled to a plunger 816, which can extend to block access to a bleed flow path 818. For example, when the bleed switch 810 is in a position associated with normal operational power, as seen in FIG. 19B, the plunger 816 can block off the bleed flow path 818. Fluid entering the main flow path 814 travels around the plunger 816 and down the remainder of the main flow path 814. Conversely, when the bleed switch 810 is in a position associated with reduced operational power, as depicted in FIG. 19C, the plunger 816 can be withdrawn so that it no longer blocks the bleed flow path 818. When fluid flows through the lance 800, it can flow through both the main flow path 814 and through the bleed flow path 818. Two flow paths effectively increase the overall area through which fluid can flow, and with greater area through which to flow, pressure will drop in the lance 800, thereby reducing the overall power output of the fluid emitted from the lance 800. While a single bleed flow path 818 is depicted, variations are contemplated herein which may include more than one bleed flow path 818. The more than one bleed flow paths 818 may be selectively accessible via one or more bleed switches 810 to provide a user with additional power level options when operating the lance 800.
[0185] As explained above, the lances described herein can be operable with a number of accessories. Several examples will be described, which are compatible with any of the lances described herein.
[0186] Generally, pressure washing can remove dirt or debris from a cleaning surface through two forces, a shear force substantially parallel to a surface being cleaned and a normal force substantially parallel to the surface being cleaned. The actual force applied to the surface by spray will be some combination of these forces, depending upon the angle of the nozzle relative to the surface. FIG. 20A lays out a diagram to highlight this relationship between shear force, normal force, and nozzle angle. For example, a nozzle angle equal to 45 degrees will be an even balance between shear and normal force. A nozzle angle equal to 90 degrees will be entirely normal force. It is generally thought that shear force is more responsible for cleaning as the applied spray can get underneath dirt and debris applied to a surface and lift it away. Of course, operation of a lance with a nozzle angle equal to zero degrees to maximize shear force is not practical, nor is it necessarily optimal, as normal force does play a role in cleaning. Moreover, certain debris types and certain surfaces may require adjusted nozzle angles to achieve a true optimum. Thus, a user, in operation, will ideally adjust the nozzle angle of their lance relative to the surface to account for these optimizations. This optimization can be tedious for a user.
[0187] Factors for a user to consider when pressure washing include nozzle tip to work surface distance, angle of the spray to the work surface, and nozzle spray angle –the angle of the spray itself. For example, a straight jet of spray may have a spray angle of about zero because the spray does not practically diverge. Conversely, a fan tip nozzle intentionally causes the spray to be emitted at some spray angle to form the intended fan shape. FIG. 20B depicts a diagram highlighting spray angle and nozzle angle. In general, a larger spray angle covers more surface area, but it can result in a weaker spray. Adjusting spray angle, in addition to nozzle angle, for a given surface and dirt or debris type means users must juggle many variables in order to properly clean a surface. Moreover, certain combinations of nozzle distance, angle, and spray angle may actually damage the surface being cleaned. If held too closely to a wooden deck, for example, spray emitted from a pressure washing system may begin to strip the wood from the deck. Accessories that control or aid in control of distances and / or angles of spray for the pressure washing systems can make cleaning easier. Several examples of such guides are described herein with reference to FIGs. 21A-23.
[0188] FIGs. 21A-21C depict a distance and angle guide 900 according to a first variation. The guide 900 can be coupled to a lance barrel and / or to an extension through the various ways described herein. The guide 900 generally includes a stem 902 pivotally coupled to a support 904. The support 904 can include one or more wheels 906, which allow a user to roll the guide 900 along a surface for convenience. The guide 900 can also include an arm 908 with a variable nozzle 910 thereon from which spray can be emitted to the surface. The arm 908 can be held at a fixed angle relative to a surface upon which the guide 900 is placed, this angle being equal to a nozzle angle. The variable nozzle 910 can be actuated between one or more discrete positions, each corresponding to a different nozzle angle. For example, as depicted, the variable nozzle 910 can include an anchor 912 seated within a divot 914 located on the arm 908. As desired, a user can pivot the variable nozzle 910 about a pivot point P1 to move the anchor 912 to another divot 914 located at a predetermined location corresponding to a different nozzle angle (FIG. 21C) . A second pivot point P2, where the stem 902 meets the support 904, allows the angle guide 900 to be pivoted during use as well (FIG. 21C) . Depending on the cleaning required, a user may want to place the anchor 912 in one of the available divots 914 in order to set the nozzle angle properly as seen in the figures. In other variations, the arm 908 may include additional divots to provide a user with a different number of options to set the variable nozzle 910 and the nozzle angle. A further example is depicted in FIG. 21C in which spray can be angled upward for cleaning under certain surfaces, such as the underbody of a car.
[0189] Depending on the design, the exact angles can vary. But for example, the guide 900 can allow a user to set a nozzle angle equal to between about 30 degrees from horizontal to about 75 degrees from horizontal. The actual angle may fall within this range at one or more discrete values (e.g., about 30, 35, 40, 45, 50, 55, 60, 65, 70, and / or 75 degrees) . Or, in some variations where the anchor 912 contacts the arm 908 via a friction fit, for example, the range may provide for a continuous distribution of nozzle angles. A user may be able to loosen the anchor 912 against the arm 908, set the nozzle angle as desired, and then tighten the friction fit to hold the nozzle angle.
[0190] A second variation of a distance and angle guide is depicted in FIGs. 22A-22E. Again, for brevity, like components of the guide 1000 as compared to guide 900 will not be described again in detail. This variation is focused on changing nozzle to work surface distance without changing spray angle. It utilizes a single wheel for a smaller lighter structure to reduce user fatigue. One commonly cleaned surface for users is a deck, which includes a plurality of boards typically extending in the same direction with a slight gap between adjacent boards. When cleaning a deck with a pressure washer, it can be tricky to clean the regions of the boards that form the gaps. The guide 1000 is designed to make this gap cleaning easier.
[0191] The guide 1000 generally includes a body 1002, a leg 1004 supporting a wheel 1006, and a spray nozzle 1008 coupled to the body 1002 and configured to direct spray to a surface. The guide 1000 includes a number of features for gap cleaning, include adjustable height and adjustable spray orientation. Adjustable height can be accomplished a number of ways. For example, the body 1002 and the leg 1004 can be slidable relative to each other such that a distance between the surface being cleaned and the spray nozzle 1008 increases. This adjustable height can be beneficial for certain kinds of cleaning. Having an adjustment range of between about 30 to 100 mm, representing a distance between the spray nozzle 1008 and the surface being sprayed, results in a distance that will not damage typical outdoor surfaces to be cleaned while having enough energy to effectively clean that surface. The nozzle 1008 can also be movable to specific preset distances to simply user selection. Adjustable spray orientation can also be accomplished in a number of ways. For example, the spray nozzle 1008 can be rotatable about an axis N1 such that the pattern of emitted spray can be rotated, and the nozzle 1008 can be pivoted about a joint N2 to adjust emission direction. If the spray is a generally horizontal fan pattern, rotating the spray nozzle 1008 about 90 degrees can result in the spray being a generally vertical fan pattern instead. This adjustment can make gap cleaning easier as the fan pattern can align with a direction of the gap more easily. The difference in spray emission via rotation about axis N1 can be seen through comparison between the depiction of FIG. 22B versus the depiction in FIG. 22C. Pivoting about joint N2 can be seen in the depiction of FIG. 22D. As also shown, the wheel 1006 can include a groove 1007 in an outer surface thereof, which can be sized to correspond to a general shape of the emitted spray. This can be seen especially in FIG. 22E. This groove 1007 can ensure spray is able to reach the surface being cleaned, rather than simply impacting the wheel.
[0192] Further, in a third variation of an angle guide 1100, similar to guide 1000, depicted in FIG. 23, a leg 1104 or a system attached thereto can include a rudder 1112 extending downward therefrom. This rudder 1112 can engage a gap between deck boards to result in easier tracking of the gaps for cleaning. Further, the rudder 1112 can be robust and shaped to force out debris while moving the guide 1100 along the deck boards that may otherwise be trapped in the gap. The rudder 1112 can either remove the trapped debris or loosen it to be removed by spray. The rotatable spray nozzle 1108 and rudder 1112 can be applied to any nozzle described herein.
[0193] Some variations may forgo wheels altogether in favor of an alternative structure, such as a low-friction foot, bristles, etc. These variations are appliable to any guide. Certain kinds of cleaning may not be suited to a handheld lance that requires a user to aim the lance and fight against the force the emitted spray. For example, when a large area must be washed, holding the lance can quickly become tiring. Certain pressure washing systems, rather than taking the form of a handheld lance, instead look more akin to a vacuum cleaner, where larger cleaning mechanism is swept over the surface to be cleaned as the mechanism applies fluid. These mechanisms can vary in a number of ways, but they tend to be large and unwieldy. At the very least, a user must make an additional purchase when deciding between a lance-type washing system and one of these larger mechanisms. However, described herein is an accessory that changes this dynamic, and this an attachable surface cleaning accessory, which allows a user to selectively couple the accessory to a lance in order to transform it into a larger surface cleaner akin to a vacuum cleaner. The exact mechanics and form of these surface cleaners can vary, but an example is depicted in FIGs. 24A-24G.
[0194] A surface cleaning attachment 1200 is provided in FIG. 24A. The surface cleaning attachment 1200 generally includes a substantially round body 1202 supported by a plurality of wheels 1204 via which the attachment 1200 can be maneuvered over a surface. The wheels 1204 can be arranged in number of ways, but as depicted they are generally placed to evenly support the attachment 1200. The attachment 1200 includes a swivel 1206 at which a nozzle passthrough at an extension end of a lance can be coupled. The swivel 1206 can be pivotally coupled to the body 1202 to provide a user with greater flexibility during use. The swivel 1206, for example, can pivot around multiple axes and / or via a multi-directional joint. As depicted, the swivel 1206 can pivot around two axes, a first axis for forward and backward pivoting, and a second axis for left and right pivoting. The swivel 1206 can pivot over each axis in any combination, effectively providing a user with 360-degree pivoting. This ability to pivot in multiple directions in combination with the wheels 1204 results in a surface cleaning accessory that rolls easily and is able to moved in straight front to back movements while allowing for easy steering to direct the surface cleaning attachment 1200 as desired while cleaning. Current surface cleaners rest on either bristles, which require significantly more user force to move, or on caster wheels, which do not allow for proper control of the surface cleaners’ motion as compared to the surface cleaning attachment 1200.
[0195] The attachment 1200 can also include a plurality of ways to emit fluid. For example, the attachment 1200 can include one or more front nozzles 1208 as well as one or more nozzles located on a rotating spray bar 1210, seen especially in FIG. 24E and discussed below.
[0196] To control the attachment 1200, such as controlling the position of the front nozzles 1208 or selecting between the front nozzles 1208 and the rotating spray bar 1210, a user can actuate one or more pedals 1212 (or 1212A, 1212B when referenced individually per the figures for the depicted embodiment) located on the attachment 1200. The one or more pedals 1212 can act as a switch with two more positions corresponding to some kind of output. FIG. 24B depicts a top-down cross-sectional view of the attachment 1200 to depict the internal workings of the attachment 1200 and the way in which they connect together.
[0197] For example, a first pedal 1212A can move the front nozzles 1208 between a downward position and a forward position. The downward position can result in a spray applied closer to the body 1202, as seen in FIG. 24C, while the forward position can result in a spray applied further from the body 1202, as also seen in FIG. 24D. The spray can take any form described herein, but as shown, each spray is generally fan-shaped. When the front nozzles 1208 are in the forward position, the spray can be oriented such that their respective fan-shapes align in a generally homogenous plane. This alignment can result in application of fluid to a large area of the surface being washed and is used to move dirty water and / or large amounts of debris from a surface. It can also be helpful for stain removal. When the front nozzles 1208 are in the downward position, not only can the front nozzles 1208 emit spray closer to the body 1202, but they can also move the spray more inward. Essentially, the front nozzles 1208, when transitioning from the forward position to the downward position, are simultaneously angling down and in via a combination of a pitch and yaw motion. The downward and inward orientation of spray directs fluid more directly at the surface in a pattern that allows for deep stain cleaning right in front of the surface cleaning attachment 1200. In this way, edges and corners not easily reached by a traditional round surface cleaner can be reached via the front nozzles 1208. Further, where the two nozzle fan sprays meet, the spray can be directed into cracks and gaps commonly found on outdoor surfaces, thereby facilitating easy cleaning of such features. A second pedal 1212B can switch fluid output from the front nozzles 1208 to the spray bar 1210 as desired. Depending on the needs of the user, the second pedal 1212B can be actuated as desired.
[0198] Referring now to FIG. 24E, a lower perspective view of the attachment is shown, which better depicts the spray bar 1210. The spray bar 1210 can be rotatably mounted to an underside of the body 1202, and the spray bar 1210 can feature one or more angled nozzles 1211 thereon. As depicted, the nozzles 1211 are located at each end of the spray bar 1210, but the exact position can vary. Further, each nozzle 1211 can be directed to emit fluid at an angle skew from vertical. In operation, fluid emitted by the nozzles 1211 toward the surface can have some horizontal force component, which can propel the nozzles in a direction opposite the direction of spray. This propulsion will cause the spray bar 1210 to rotate about its central pivot point 1214, and fluid can be applied to the surface in a circular pattern. The exact angle at which the nozzles 1211 are set can vary according to the parameters and variables described above in order to generate the desired rotational speed of the nozzles 1211 for the fan spray angle and overall spray angle. As also depicted in FIG. 24E, the body 1202 can include bristles 1216 disposed therein. The bristles 1216 be placed anywhere on the body 1202, including around a circumference thereof as shown. These bristles 1216 can be made of various materials are meant to keep spray under the surface cleaning attachment to minimize egress of dirty water onto the surrounding area, including back at a user.
[0199] The spray bar 1210 can vary in a number of ways. For example, depicted in FIG. 24F is an offset spray bar 1210A with uneven arm lengths. The spray bar 1210A can include a nozzle 1211A located at each end of the spray bar 1210A, but a distance from each nozzle 1211A to the pivot point 1214A varies. When fluid is applied by the spray bar 1210A to a surface being cleaned, rather than being applied in a single ring, the spray bar 1210A can apply fluid in a pattern comprising concentric rings or as a single wider ring of cleaned area. This new pattern can result in greater area coverage by the spray bar 1210A as compared to spray bars having symmetrical nozzles, such as spray bar 1210A. The wider cleaning ring can allow a user to move faster over an area to be cleaned while maintaining a uniform level of cleaning.
[0200] Turning now to FIG. 24G, a rear view of the attachment 1200 and swivel 1206 is depicted. This view showcases the swivel 1206 in greater detail. The swivel 1206 can vary in a number of ways. Most importantly, the swivel 1206 can include features that allow it to couple to a lance or extension, as introduced above. As depicted, the swivel 1206 generally includes a central tube 1218 defining an inlet 1220 through which fluid can be received and transported to the front nozzles 1208 and the spray bar 1210. The swivel 1206 can also include a seat 1222, which can be shaped to receive and support a lance so that the weight of the lance is not applied directly to the extending central tube 1218. This seat 1222 can ensure the central tube 1218 does not flex or bend, which could result in less control of the surface cleaning attachment 1200 or even damage.
[0201] In addition to the accessories described above, other accessories are also contemplated. For example, FIGs. 25-27B illustrate a variety of attachments usable with the pressure washers described herein, as well as with pressure washers generally. As shown in FIG. 25, these attachments can include a so-called duospray nozzle 1300, an extension wand 1302, a secondary grip 1304, a distance guide 1306, and a scrub brush 1308.
[0202] The duospray nozzle 1300, according to a first variation, is depicted in greater detail in FIG. 26. Generally, the duospray nozzle 1300 can be coupled to a pressure washer lance, such as lance 200, and it can include two separate fluid outlets 1310 from which fluid can be emitted. The fluid outlets 1310 can be arranged at separate angles relative to some target region in order to spray that target region at the same time from those angles (e.g., 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, or more degrees) . For example, when cleaning a fence post 1311, the fence post 1311 can be placed within the target region, and the outlets 1310 can be used to spray two or more sides of the fence post 1311 simultaneously. This can make cleaning a rounded or multi-sided object much more convenient. Instead of trekking around the fence to spray a rear side, or instead of maneuvering a lance in creative ways to target an entire outer surface of the fence post 1311, or similar structure, the duospray nozzle 1300 can enable cleaning of the surface with fewer passes and from a more straightforward approach. In some variations, the outlets 1310 can rotate via a pivot 1312 to improve cleaning convenience and to adjust the output trajectories of the outlets 1310.
[0203] FIGs. 27A and 27B depict a duospray nozzle 1300A according to another variation. The duospray nozzle 1300A is similar to the duospray nozzle 1300 in that it features two outlets 1310A at differing angles, except that the outlets 1310A are oriented about 180 degrees relative to each other. This orientation can be used to wash opposing sides of a target object 1311A, such as fence post. Further, the duospray nozzle 1300A can also include a target guide 1312A. The target guide 1312A can be placed against the target object 1311A for stability to ensure the target object 1311A is properly saturated and cleaned.
[0204] In addition to the pressure washing systems described above, pressure washing systems can take other forms, including upright pressure washing systems. Generally, upright pressure washing systems include a support, such as a caddy or frame, a motor and pump to pressurize a cleaning fluid, and a spray nozzle for emitting the pressurized cleaning fluid onto a surface to be cleaned. The spray nozzle can take various forms and may include a handheld spray nozzle in the form of a lance or the like, and the spray nozzle may also be located on the support itself to apply fluid directly to a cleaning surface as the support is moved about that surface. Examples of such systems, and variations thereof, are described herein with reference to FIGs. 28-51. Any of the details depicted herein can be applied to any other pressure washing system, and similarly, and details described above can be applied to the pressure washing systems of FIGs. 28-51.
[0205] FIGs. 28-30 depict views of an upright washing device 1400 for pressure washing, which features a lift-away configuration. When a user desires surface cleaning via an upright unit, akin to a vacuum cleaner, they may maneuver the device 1400 about a surface in the configuration depicted in FIG. 28 or 29. When the user desires surface cleaning via a handheld lance, they may reconfigure the device to a form shown in FIG. 30 in which the lance may be removed and handled separately. Generally, the washing device 1400 can include a support 1410, a spray nozzle 1420 and a pump 1430 that can together be used to wash a surface. The support 1410 can include an upright ergonomic stand 1412 connected to a washing head 1414. The head 1414 can include two or more wheels 1416 resting on a cleaning surface to make maneuvering the support 1410 easier for a user. The head 1414 can include a nozzle in order to clean the surface upon which the support 1410 rests. This nozzle will be described in further detail below. As shown in FIG. 28, the support 1410 can also include supports for a hose 1419A and a power cord 1419B.
[0206] The spray nozzle 1420 can take the form of a removable lance, which can be coupled to the stand 1412 when surface cleaning via the stand 1412 is desired in a configuration shown in FIG. 29, or the spray nozzle 1420 can be removed from the support 1410 and operated directly by a user in a configuration shown in FIG. 30.
[0207] The pump unit 1430 can contain both a motor and a pump and will be described in greater detail below. In general, when the device 1400 is placed within the FIG. 29 configuration, the pump unit 1430 can be placed onto the support 1410 for user convenience. As shown, the pump unit 1430 can be placed directly atop the head 1414. When the device 1400 is placed within the FIG. 30 configuration, the pump unit 1430 can be removed from its position on the support 1410 via a handle located on the pump unit 1430. A user can then operate the spray nozzle 1420 in one hand and handle the pump unit 1430 in the other. Or a user may place the pump unit 1430 down beside them while they handle the spray nozzle 1420. The arrangement of components of the device 1400 provides a user with greater flexibility to clean a variety of cleaning surfaces –the user can orient the device 1400 into a configuration most desirable for them to perform washing.
[0208] Cleaning fluid flows through the device 1400 via the hose through the pump unit 1430 and then through the spray nozzle 1420. When the spray nozzle 1420 is not docked in the support 1410, it can be emitted directly by the spray nozzle 1420. When the spray nozzle 1420 is docked in the support 1410, the two components couple together and the support 1410 becomes part of the fluid pathway. Fluid emitted by the spray nozzle 1420 actually flows through the support 1410 before it is emitted by the support’s 1410 own nozzle, described in greater detail below. Because the spray nozzle 1420 must be usable in both a docked and undocked configuration, and because, when docked, fluid must flow from the spray nozzle 1420 to the support 1410, the connection between the spray nozzle 1420 and support 1410 is an important feature. FIGs. 31-41 depict several variations of features to facilitate this connection. The features described are generalized and can be applied to pressure washers generally and to any of the pressure washing devices described herein, including to the lances, extensions, nozzles, and accessories described above.
[0209] FIGs. 31-36 depict a first connection variation between a spray nozzle 1520 and a support 1510. As shown in FIG. 31, an end of a spray nozzle 1520 can have multiple outlets 1522. The bottom three outlets 1522 can be differentiated by a fan angle of the emitted spray, either 15, 25, or 40 degrees, for example. These values can vary as needed. A fourth outlet 1524 in the form of a protruding nozzle 1524 extending from the spray nozzle 1520 includes a seal 1526, such as a o-ring, and this fourth outlet 1524 can be received by a complementary portion of the support 1510 to join the spray nozzle 1520 with the support 1510. As shown in FIG. 32, this insertion of a protruding nozzle 1524 into a receiver 1512 on a support 1510 is depicted. FIG. 33 depicts a cross-sectional view of the connection. A latch 1514 or other actuator can be actuated to release the spray nozzle 1520 from engagement with the support 1510.
[0210] In some variations, a pump unit can be fluidly connected to the base in an arrangement similar to that shown in FIG. 28 through a valved connection such that the high-pressure cleaning fluid flows directly from the pump unit to a spray nozzle assembly in a head of a washing device (e.g., washing device 1400) bypassing the spray nozzle 1520 and the support 1510. This can result in more efficient flow path with less pressure loss when using the head for cleaning.
[0211] Additional details of this first variation are depicted in FIGs. 34-36. As shown, an end of the spray nozzle 1520 can also rotate about a longitudinal axis while still maintaining consistent spray. A shuttle valve 1525 located within the spray nozzle 1520 ensures that the fourth outlet 1524 –the connecting outlet –remains closed until docking is desired. When the spray nozzle 1520 is docked with a support 1510, alignment features on the spray nozzle 1520 and / or the support 1510 can ensure the fourth outlet 1524 on the spray nozzle 1520 is properly received by the support 1510. Upon reception, the shuttle valve 1525 can be shifted to open the fourth outlet 1524 and close the remaining outlets 1522, ensuring proper fluid flow through the device (e.g., device 1400) . In this way, the engagement between the spray nozzle 1520 and the support 1510 acts as a kind of quick-connect socket.
[0212] A second variation is depicted in FIGs. 37-39. As seen in FIG. 37, a spray nozzle 1620 is shown, which can be twisted for a continuous range of spray angles. In FIG. 38, the spray nozzle 1620 is shown being inserted into a receiver 1611 of a support 1610. The spray nozzle 1620 can auto-rotate upon insertion to a most open position (corresponding to a maximum spray angle) via grooves 1612 or some other guiding mechanism within the support 1610. The spray nozzle 1620 can abut an inlet pipe 1614, and a user can actuate a seal 1616 (shown in the form of a handle on the outside of the stand) in order to seal the spray nozzle 1620 to the inlet pipe 1614. To release the spray nozzle 1620, the seal 1616 can be actuated and the spray nozzle 1620 removed as shown in FIG. 39.
[0213] A third variation is depicted in FIGs. 40-41. FIG. 40 features a spray nozzle 1720 with two separate sides 1722, 1724. A first side 1722 is shaped like a wheel and features a plurality of outlets 1726 corresponding to an equal number of spray types, e.g., fan, stream, etc. A second side 1724 features a fluid outlet 1728 akin to the fluid outlet 1524. This fluid outlet 1728 can couple to a corresponding receiver 1712 in a support 1710 as shown in FIG. 41. Both sides 1722, 1724 are disposed on a valve portion 1730 with a slidable switch 1732. A comparison between FIGs. 40 and 41 reveals that the switch 1732 is slid toward the first side 1722 in FIG. 41, corresponding to fluid being diverted toward this first side 1722 and is slid toward the second side 1724 in FIG. 41 in preparation for coupling with the support 1710.
[0214] FIGs. 42-45 depict variations of the pump unit 1430 in greater detail. As introduced above, the device 1400 is generally configurable to be placed in either an upright configuration, seen in FIG. 28, or in a handheld or grounded configuration, seen in FIG. 30. As shown in FIG. 42, the pump unit 1430 includes an outer housing 1432 containing a motor 1434 and a pump 1436. An inlet 1438 and an outlet 1440 are connected to the pump 1436 to respectively supply and receive cleaning fluid therefrom. FIG. 43 also shows an overpressure valve 1442, which can release pressure if required for safety.
[0215] Many typical motor and pump configurations for pressure washing systems employ an in-line set up in which the motor and pump are aligned around a common drive axis. This arrangement works well with many pressure washing system configurations. But for the motor pump assembly to ride on a floor nozzle, a more cubic structure is desired for lightweight operations. This arrangement, while convenient, results in a bulkier setup. Maneuverability is key for the pump unit 1430, so it employs a side-by-side arrangement with the motor 1434 and pump 1436 as shown in the variations of FIGs. 42-44. The exact arrangement can vary, and three variations are depicted, but in general, the motor 1434 and pump 1436 are placed next to each other while being mechanically coupled by some means such as gears, a belt, etc. The inlet 1438 and outlet 1440 are shown in the variations as varying in size and shape, and the overall space that the motor 1434 and pump 1436 occupy may dictate their arrangement.
[0216] Pressure washers can operate to spray a floor in a number of ways. Some washers are entirely handheld, and they require a user to aim a direct fluid over a surface. Some washers are movable or otherwise rollable over a surface in a line to spray the surface with fluid. These washers may feature nozzles that rotate about a central axis to spray fluid in a circular pattern. While such washers may provide greater coverage than other washers, the coverage on the surface can be streaky and uneven.
[0217] FIGs. 46-51 are directed to variations of pressure washers, compatible with any pressure washing system device described herein such as device 1400, which spray fluid along an arc using an oscillating nozzle.
[0218] As seen in FIG. 46, the outline of a washing head (for example washing head 1414) is shown along with a conceptual map of coverage by a nozzle oscillating along an arced path. As the washing head travels forward, the nozzle oscillates back and forth to spray the surface in stacked arc shapes.
[0219] FIG. 47 depicts an underside of a washing head 1414 with an oscillating nozzle 1450. The nozzle 1450 can oscillate in a number of ways, but as shown, the nozzle 1450 is set at an end of an oscillating arm 1452. The arm 1452 pivots about a pivot axis 1454, and a counterweight 1456 is placed opposite the arm 1452 on a side directly across the pivot axis 1454 therefrom to balance the arm 1452 while it oscillates. The arm 1452 and counterweight 1456 can be arranged such that they are directly tied to each other, i.e., the arm 1452 pivots left while the counterweight 1456 pivots right, or they can be inversely tied to each other, i.e., the arm 1452 pivots left while the counterweight 1456 also pivots left. This inverse relationship can be achieved using a gear system or the like. In operation, the arm 1452 pivots back and forth over an arc range. This range can depend on a size of a frame 1458, shown in FIG. 48, which defines the bounds of the arm’s 1452 range of motion.
[0220] The nozzle 1450 can be seen in greater detail in FIGs. 49A-49C. FIG. 49A depicts the nozzle 1450 in a neutral position. The nozzle 1450 can be aimed slightly in front of its arced path, along its arced path, or rearward of its arced path, depending on a desired kind of cleaning. The nozzle 1450 can be configured to emit fluid in a direct jet, a fan-shaped spray, and / or other variations. FIG. 49B depicts the nozzle when it is traveling along its arc. As shown, the nozzle 1450 is angled to spray in a leftward direction as indicated by the arrow of motion A. This slight horizontal component to the spray causes the arm 1452 to begin oscillating against the force of the spray in a rightward direction, indicated by the arrow of motion B. Eventually, the nozzle will reach the end of its arc. A fin 1451, sticking upward from the nozzle 1450, can be arranged to collide with a portion of the arc frame 1458, and the momentum of the arm 1452 and nozzle 1450 can cause the fin 1451, with the nozzle 1450 attached, to pivot in the opposite direction. This pivot then angles the spray to aim in a rightward direction, shown in the right panel of FIG. 49C, and the force then causes the arm and nozzle to move, against the force of spray, in a leftward direction. Eventually, the fin will collide with the opposite side of the arc frame, pivot the nozzle to face the other direction, and send the arm traveling rearward. In this way, oscillation of the arm and the nozzle is entirely driven by the force of water emitted by the nozzle. Other variations are contemplated where the oscillating is motor-driven, spring driven, or has some other kind of active driver.
[0221] Another view of the oscillating arm 1452 in the washing head 1414 is depicted in FIGs. 50 and 51. A path of movement of the nozzle 1450 is also depicted via arrows H. In this variation, the washing head 1414 also includes agitation or bristle strips 1460 to assist with guiding water and / or debris on the cleaning surface. FIG. 51 depicts a superposition of the arm 1452 at a middle of its path of travel and at a first end of its path of travel.
[0222] In a further variant, there are two oscillating arms, each having a nozzle at an end thereof and functioning as described herein. The second oscillating arm can be somewhat shorter than the first oscillating arm and is geared to the first oscillating arm such that when one arm is traveling to a first side, the other arm is traveling to the other side. In this way, the dual arms resolve much of the internal forces and enable the spray nozzles to operate. With a proper arm length and nozzle location, the nozzles can clean paths next to each other resulting in an overall cleaning path for each oscillation that is twice as wide as a path associated with a single arm concept.
[0223] Certain illustrative implementations have been described to provide an overall understanding of the principles of the structure, function, manufacture, and use of the systems, devices, and methods disclosed herein. One or more examples of these implementations have been illustrated in the accompanying drawings. Those skilled in the art will understand that the systems, devices, and methods specifically described herein and illustrated in the accompanying drawings are non-limiting illustrative implementations and that the scope of the present utility model is defined solely by the claims. The features illustrated or described in connection with one illustrative implementation may be combined with the features of other implementations. Such modifications and variations are intended to be included within the scope of the present utility model. Further, in the present disclosure, like-named components of the implementations generally have similar features, and thus within a particular implementation each feature of each like-named component is not necessarily fully elaborated upon.
[0224] Approximating language, as used herein throughout the specification and claims, may be applied to modify any quantitative representation that could permissibly vary without resulting in a change in the basic function to which it is related. Accordingly, a value modified by a term or terms, such as “about, ” “approximately, ” and “substantially, ” are not to be limited to the precise value specified. In at least some instances, the approximating language may correspond to the precision of an instrument for measuring the value. Here and throughout the specification and claims, range limitations may be combined and / or interchanged, such ranges are identified and include all the sub-ranges contained therein unless context or language indicates otherwise.
[0225] One skilled in the art will appreciate further features and advantages of the utility model based on the above-described implementations. Accordingly, the present application is not to be limited by what has been particularly shown and described, except as indicated by the appended claims. All publications and references cited herein are expressly incorporated by reference in their entirety.
Claims
1.A pressure washing device, comprising:a frame defining a fluid inlet thereon;a drum supported by the frame and rotatable relative to the frame about a rotational axis, the drum being configured to support a hose wrapped therearound; anda motor and pump disposed within the drum and intersecting the rotational axis, the motor and pump being configured to pressurize fluid received via the fluid inlet and deliver pressurized fluid via the hose to a lance coupled to the hose,wherein the drum is configured to rotate about the rotational axis while the motor and regulator remain fixed relative to the frame, andwherein the motor and pump are aligned with each other about the rotational axis.2.The pressure washing device of claim 1, further comprising:a power cord configured to transport power to the motor and pump; anda power cord reel intersecting the rotational axis, the power cord reel being configured to support the power cord around an exterior thereof.3.The pressure washing device of claim 2, wherein the power cord reel is rotatable relative to the rotational axis.4.The pressure washing device of claim 3, wherein the power cord reel is rotatable independently of the drum.5.The pressure washing device of claim 3, wherein the power cord reel is configured to be selectively coupled to the drum such that the drum and the power cord reel can be rotated together.6.The pressure washing device of claim 2, further comprising a spring configured to supply a torque to the power cord reel to automatically wind the power cord.7.The pressure washing device of claim 1, further comprising a crank extending from an end of the drum, wherein actuation of the crank is configured to rotate the drum about the rotational axis.8.The pressure washing device of claim 1 wherein the lance is configured to couple to the frame.9.The pressure washing device of claim 1 further comprising a plurality of wheels coupled to the frame.10.The pressure washing device of claim 1, wherein the lance further comprises a trigger configured to cause the lance to emit pressurized fluid, and wherein coupling the lance to the frame is configured to actuate a trigger lock configured to prevent actuation of the trigger while the lance is coupled to the frame.11.A pressure washing device, comprising:a pressure washing body comprising a frame and a drum rotatably coupled to the frame relative to a rotational axis, the drum defining a central cavity and configured to wind and unwind a hose around an exterior thereof;a motor and a pump disposed within the drum, the motor and the pump being configured to receive and pressurize at least one cleaning fluid; anda lance fluidly coupled to the pressure washing body via the hose, the lance being configured to emit the at least one cleaning fluid pressurized by the motor and the pump.12.The pressure washing device of claim 11, wherein drum is configured to rotate about a rotational axis intersecting the motor and the pump while the motor and the pump are configured to remained fixed relative to the frame.13.The pressure washing device of claim 12, further comprising a crank coupled to the drum, wherein actuation of the crank is configured to rotate the drum about the rotational axis.14.The pressure washing device of claim 11, further comprising:a power cord configured to transport power to the motor and pump; anda power cord reel intersecting the rotational axis, the power cord reel being configured to support the power cord around an exterior thereof.15.The pressure washing device of claim 14, wherein the power cord reel is rotatable relative to the rotational axis.16.The pressure washing device of claim 15, wherein the power cord reel is rotatable independently of the drum.17.The pressure washing device of claim 15, wherein the power cord reel is configured to be selectively coupled to the drum such that the drum and the power cord reel can be rotated together.18.The pressure washing device of claim 14, further comprising a spring configured to supply a torque to the power cord reel to automatically wind the power cord.19.The pressure washing device of claim 11, wherein the lance is configured to be selectively docked on the pressure washing body.20.The pressure washing device of claim 19, wherein the pressure washing body further comprises a plurality of wheels about which the pressure washing device can be maneuvered, and wherein the lance is configured to operate as a handle by which to maneuver the pressure washing device when the lance is docked on the pressure washing body.21.A pressure washing device, comprising:a pressure washing body configured to receive and pressurize a fluid, the pressure washing body having a plurality of wheels thereon; anda lance,wherein the pressure washing device is movable between a use mode in which the lance is decoupled from the pressure washing body and configured to emit the pressurized fluid and a transportation mode in which the lance is coupled to the pressure washing body and configured to operate as a handle by which the pressure washing body can be maneuvered via the plurality of wheels.22.The pressure washing device of claim 21, wherein the lance comprises a trigger lock movable between a first position in which the lance is configured to emit the pressurized fluid and a second position in which the lance is prevented from emitting the pressurized fluid by the trigger lock.23.The pressure washing device of claim 22, wherein the trigger lock is configured to automatically move to the second position when the pressure washing device is in the transportation mode.24.The pressure washing device of claim 21, wherein the pressure washing body comprises a frame and a drum rotatably coupled to the frame, the drum defining a central cavity and configured to wind and unwind a hose around an exterior thereof, the hose fluidly coupling the pressure washing body and the lance.25.The pressure washing device of claim 24, wherein the pressure washing body comprises a pump and a motor disposed within the central cavity, wherein the pump and the motor are fixed to the frame such that the drum is configured to rotate relative to the frame, the pump, and the motor.26.A pressure washing device, comprising:a pressure washing body configured to receive and pressurize and first fluid; anda lance fluidly coupled to the pressure washing body and configured to emit the pressurized first fluid from the pressure washing body, the lance comprising:a handle including a spray trigger;a barrel extending from handle;at least one fluid container coupled to the handle, the at least one fluid container being configured to store and selectively dispense at least one second fluid into a flow path of the first fluid; andan actuator that, upon actuation, is configured to cause the at least one fluid container to selectively dispense the stored at least one second fluid.27.The pressure washing device of claim 23, wherein the at least one fluid container comprises a first fluid container and a second fluid container, wherein the at least one second fluid comprises a second fluid stored and dispensed from the first fluid container and a third fluid stored and disposed from the second fluid container.28.The pressure washing device of claim 27, wherein the actuator, upon actuation, is configured to cause one of:the first fluid container to dispense the second fluid into the flow path,the second fluid container to dispense the third fluid into the flow path, andthe first fluid container and the second fluid container to simultaneously dispense the second and third fluids into the flow path.29.The pressure washing device of claim 23, wherein the pressure washing body comprises:a frame,a drum rotatably coupled to the frame, the drum configured to support a hose on an exterior thereof, anda pump unit disposed in an interior of the drum.30.The pressure washing device of claim 29, wherein the pump unit is fixed to the frame, and the drum is configured to rotate relative to the frame and the pump unit.31.The pressure washing device of claim 29, wherein the drum is supported on a plurality of drum bearings.32.The pressure washing device of claim 29 further comprising a crank disposed on the drum, the crank being configured to be actuated to cause the drum to rotate.33.The pressure washing device of claim 23, wherein the pressure washing body comprises a plurality of wheels.34.The pressure washing device of claim 23, further comprising an extension configured to couple to an end of the barrel, the extension being configured to receive and transmit pressurized fluid emitted by the barrel.35.The pressure washing device of claim 34, further comprising at least one accessory configured to alter an emission pattern pressurized fluid, the at least one accessory being configured to selectively couple to either the end of the barrel or to an end of the extension.36.A pressure washing unit, comprising:a lance comprising:a handle including a spray trigger configured to be actuated by a user,a barrel configured to emit pressurized fluid therefrom upon actuation of the trigger, anda first push rod extending from the handle to an distal end of the barrel, the push rod being slidable along the lance; andan extension configured to removably couple to the distal end of the barrel, the extension defining a flow path and configured to transmit pressurized fluid along the flow path, the extension including a second push rod configured to longitudinally align with the first push rod when the extension is coupled to the barrel.37.The pressure washing unit of claim 36, wherein a distal end of the extension is configured to couple to a removable accessory configured to alter a spray pattern of pressurized fluid transmitted by the barrel.38.The pressure washing unit of claim 37, wherein the lance further comprises an actuator configured to, upon actuation, cause the first push rod and the second push rod to translate and eject a coupled removable accessory.39.The pressure washing unit of claim 36, wherein the lance comprises a linkage configured to convert proximal translation of the first push rod to distal translation of the second push rod.40.The pressure washing unit of claim 39, wherein the lance further comprises an actuator configured to eject an accessory coupled to the extension upon actuation through longitudinal translation of the first and second push rods.41.The pressure washing unit of claim 39, wherein the extension further comprises a detent configured to automatically lock and prevent actuation of the spray trigger upon docking the extension on a pressure washing body through longitudinal translation of the first and second push rods.42.The pressure washing unit of claim 36, wherein the lance further comprises at least one chemical container configured to store and selectively dispense a chemical agent into a flow path of the pressurized fluid.43.The pressure washing unit of claim 42, wherein the at least one chemical container comprises a first chemical container configured to store and selectively dispense a first chemical agent and a second chemical container configured to store and selectively dispense a second chemical agent.44.The pressure washing unit of claim 43, wherein the lance further comprises a chemical actuator that, upon actuation, is configured to:facilitate dispensing of the first chemical agent from the first chemical container into the flow path,facilitate dispensing of the second chemical agent from the second chemical container into the flow path, orfacilitate simultaneous dispensing of the first and second chemical agents from the first and second chemical containers into the flow path.45.A pressure washing unit, comprising:a pressure washing body configured to receive fluid from a fluid source and pressurize the received fluid; anda lance in fluid communication with the pressure washing body, the lance being configured to receive and selective emit fluid pressurized by the pressure washing body, comprising:a handle including a spray trigger configured to cause the lance to emit pressurized fluid upon actuation,a barrel ending distally from the handle, anda push rod extending from the handle proximate the trigger and at least partially along a length of the barrel, the push rod being configured to longitudinally translate relative to the handle and the barrel to selectively contact the spray trigger.46.The pressure washing unit of claim 45, wherein the lance is configured to dock on the pressure washing body.47.The pressure washing unit of claim 46, wherein the push rod, upon docking the lance, is configured to translate and abut the spray trigger thereby preventing actuation of the spray trigger while the lance is docked.48.The pressure washing unit of claim 45, further comprising an extension configured to couple to the end of the barrel, the extension being configured to receive pressurized fluid emitted by the lance and to emit the received pressurized fluid.49.The pressure washing unit of claim 48, wherein the push rod extends to a distal end of the barrel, and wherein the extension includes a second push rod configured to translate longitudinally relative to the extension, the push rod and the second push rod aligning longitudinally when the extension is coupled to the barrel.50.The pressure washing unit of claim 49, wherein the lance further includes a slider and a linkage disposed distally of the push rod and coupled to the push rod, andwherein docking the lance and the extension on the pressure washing body is configured to automatically actuate the slider simultaneously translate the push rod proximally to lock the spray trigger and translate the second push rod distally to eject an accessory coupled to the extension.51.The pressure washing unit of claim 49, wherein the extension is configured to removably couple with at least one accessory configured to alter a spray pattern of the extension, andwherein the lance includes an accessory actuator configured to detach a coupled at least one accessory from the extension, the accessory actuator translating the push rod and the second push rod to detach the at coupled at least one accessory.52.The pressure washing unit of claim 45, wherein the lance further comprises at least one chemical container configured to store and selectively dispense a chemical agent into a flow path of the pressurized fluid.53.The pressure washing unit of claim 52, wherein the at least one chemical container comprises a first chemical container configured to store and selectively dispense a first chemical agent and a second chemical container configured to store and selectively dispense a second chemical agent.54.The pressure washing unit of claim 53, wherein the lance further comprises a chemical actuator that, upon actuation, is configured to:facilitate dispensing of the first chemical agent from the first chemical container into the flow path,facilitate dispensing of the second chemical agent from the second chemical container into the flow path, orfacilitate simultaneous dispensing of the first and second chemical agents from the first and second chemical containers into the flow path.55.A pressure washing device, comprising:a lance configured to emit pressurized fluid; andan accessory coupled to the lance, the accessory configured to transmit pressurized fluid emitted by the lance, the accessory comprising:a central flow path, anda peripheral flow path,wherein pressurized fluid is configured to flow through one of the central flow path and the peripheral flow path at a time.56.The pressure washing device of claim 55, wherein the accessory further includes a shuttle disposed in the central flow path and the peripheral flow path, the shuttle being movable between a proximal position in which the shuttle obstructs the peripheral flow path and a distal position in which the shuttle obstructs the central flow path.57.The pressure washing device of claim 56, wherein the shuttle is biased to the distal position.58.The pressure washing device of claim 56, wherein the accessory is configured to receive at least one attachment within central flow path.59.The pressure washing device of claim 58, wherein the reception of the at least one attachment is configured to move the shuttle to the proximal position.60.The pressure washing device of claim 55, wherein the accessory comprises a first cuff rotationally disposed about the central flow path.61.The pressure washing device of claim 60, wherein the first cuff comprises a plurality of nozzles disposed therein, each nozzle being configured to alter a spray pattern of pressurized fluid flowing through the peripheral flow path, and wherein the first cuff is configured to be rotatable by a user to select a given nozzle in the plurality of nozzles.62.The pressure washing device of claim 61, wherein the accessory comprises a second cuff rotationally disposed about the central flow path, the first cuff and the second cuff being independently rotatable relative to each other.63.The pressure washing device of claim 62, wherein rotation of the second cuff is configured to rotate the peripheral flow path relative to the central flow path, andwherein rotation of the peripheral flow path is configured to alter an orientation of pressurized fluid emitted by the accessory.64.The pressure washing device of claim 63 wherein the second cuff is disposed proximally of the first cuff.65.A pressure washing device, comprising:a lance configured to receive pressurized fluid, the lance including a first trigger and a second trigger; anda multi-nozzle coupled to the lance at a distal end thereof, the multi-nozzle being configured to emit the received pressurized fluid in one or more selectable spray patterns upon actuation of the first trigger, the multi-nozzle being configured to receive an accessory,wherein actuation of the second trigger is configured eject an accessory received by the multi-nozzle.66.The pressure washing device of claim 65, wherein the lance comprises a handle and a barrel extending distally from the handle, and wherein the first trigger and the second trigger are disposed on the handle.67.The pressure washing device of claim 65, wherein the lance comprises:a handle;a barrel extending distally from the handle;an extension removably coupled to a distal end of the barrel,wherein the multi-nozzle is coupled to a distal end of the barrel.68.A pressure washer guide, comprising:a frame;an inlet coupled to the frame, the inlet being configured to couple to a fluid outlet of a pressure washing device and receive pressurized fluid therefrom; andan outlet configured to emit the received pressurized fluid;wherein the frame is configured to contact a surface to be cleaned such that the outlet is disposed at a predefined distance and a predefined angle relative to the contacted surface to control emission of the received pressurized fluid onto the contacted surface; andwherein at least one of the outlet and the frame is adjustable to alter at least one of the predefined distance and predefined angle relative to the contacted surface.69.The pressure washer guide of claim 68, further comprising at least one wheel configured to contact the surface to be cleaned.70.The pressure washer guide of claim 69, wherein the at least one wheel comprises a plurality of inline wheels each configured to contact the surface to be cleaned.71.The pressure washer guide of claim 68, further comprising a brush configured to contact the surface to be cleaned.72.The pressure washer guide of claim 68, wherein the outlet is configured to emit the received pressurized fluid in a fan-shaped spray pattern.73.The pressure washer guide of claim 72, wherein the outlet is rotatable to transform the fan-shaped spray pattern between a substantially horizontal orientation and a substantially vertical orientation.74.The pressure washer guide of claim 73, further comprising at least one wheel configured to contact the surface to be cleaned.75.The pressure washer guide of claim 74, wherein the at least one wheel defines a groove therearound, the fan-shaped spray pattern being configured to flow through the groove when the fan-shaped spray pattern is in the substantially vertical orientation.76.The pressure washer guide of claim 68, wherein the frame comprises an arm, andwherein the outlet is rotatably attached to the arm.77.The pressure washer guide of claim 76, wherein the nozzle is configured to be placed in a plurality of discrete rotational positions corresponding to predetermined emission angles relative to a contacted surface.78.A pressure washing device, comprising:a lance configured to emit pressurized fluid;a surface cleaner attachment configured to couple to an end of the lance and configured to emit pressurized fluid emitted by the lance, the surface cleaner attachment comprising:a body,a rotatable nozzle bar disposed on an underside of the body, the rotatable nozzle bar including one or more nozzles configured to emit the pressurized fluid toward a surface being cleaned, the one or more nozzles configured to cause the rotatable nozzle bar to rotate relative to the body due to the emission of the pressurized fluid, andat least one front nozzle configured to emit pressurized fluid at a target location disposed in front of the surface cleaner attachment.79.The pressure washing device of claim 78, wherein the at least one front nozzle comprises a first front nozzle and a second front nozzle.80.The pressure washing device of claim 78, wherein the at least one front nozzle is configured to emit fluid in a fan-shaped spray pattern.81.The pressure washing device of claim 78, wherein the at least one front nozzle is movable between a forward position in which the at least one front nozzle is configured to target a first region and a downward position in which the at least one front nozzle is configured to target a second region closer to the body than the first region.82.The pressure washing device of claim 81, wherein the surface cleaner attachment comprises at least one actuator configured to selectively transform the at least one front nozzle between the forward position and the downward position.83.The pressure washing device of claim 78, wherein the body includes a first actuator configured to selectively switch fluid supply between the rotatable nozzle bar and the at least one forward nozzle.84.The pressure washing device of claim 83, wherein the body includes a second actuator configured to selectively transform the at least one front nozzle between a forward position and a downward position.85.The pressure washing device of claim 78, wherein the rotatable nozzle bar is configured to pivot about a middle thereof.86.The pressure washing device of claim 78 wherein the rotatable nozzle bar is configured to rotate about a rotational axis such that a first end of the nozzle bar beyond the rotational axis in a first direction is greater than a second end of the nozzle bar beyond the rotational axis in the second direction.87.The pressure washing device of claim 78, further comprising a brush disposed around a circumference of the housing.88.A pressure washing attachment, comprising:a housing having a substantially round form;at least one fluid inlet configured to couple to an end of a pressure washing device and receive pressurized fluid therefrom;a rotatable nozzle bar disposed on an underside of the housing, the rotatable nozzle bar having at least one nozzle configured to emit pressurized fluid received from a coupled end of the pressure washing device to cause the rotatable nozzle bar to rotate relative to the housing;at least one front nozzle disposed on the housing and configured to emit pressurized fluid received from a coupled end of the pressure washing device toward a target location located in front of the housing.89.The pressure washing attachment of claim 88, wherein the fluid inlet is pivotable relative to the housing.90.The pressure washing attachment of claim 89, wherein the fluid inlet is configured to pivot relative to the housing about at least two axes of rotation either separately or simultaneously.91.The pressure washing attachment of claim 88, further comprising a plurality of wheels.92.The pressure washing attachment of claim 88, wherein the at least one front nozzle is movable between a forward position in which the at least one front nozzle is configured to target a first region and a downward position in which the at least one front nozzle is configured to target a second region closer to the body than the first region.93.The pressure washing attachment of claim 92, further comprising at least one actuator configured to selectively transform the at least one front nozzle between the forward position and the downward position.94.The pressure washing attachment of claim 88, further comprising at least one actuator configured to selectively switch fluid supply between the rotatable nozzle bar and the at least one forward nozzle.95.The pressure washing attachment of claim 88, wherein the rotatable nozzle bar is configured to pivot about a middle thereof.96.The pressure washing attachment of claim 88, wherein the rotatable nozzle bar is configured to rotate about a rotational axis such that a first end of the nozzle bar beyond the rotational axis in a first direction is greater than a second end of the nozzle bar beyond the rotational axis in the second direction.97.The pressure washing attachment of claim 88, further comprising a brush disposed around a circumference of the housing.98.A pressure washing attachment, comprising:a housing having a substantially round form;an inlet pivotally coupled to the housing and configured to receive a pressurized fluid, the inlet being configured to pivot relative to the housing about at least two distinct axes, the inlet being configured to couple to a distal end of a pressure washing lance;a rotatable nozzle bar disposed on an underside of the housing, the rotatable nozzle bar having at least one nozzle configured to emit pressurized fluid; andat least one front nozzle disposed on the housing and configured to emit pressurized fluid.99.The pressure washing attachment of claim 98, further comprising a plurality of wheels disposed on the housing.100.The pressure washing attachment of claim 98, wherein the at least one front nozzle is movable between a forward position in which the at least one front nozzle is configured to target a first region and a downward position in which the at least one front nozzle is configured to target a second region closer to the body than the first region.101.The pressure washing attachment of claim 100, further comprising at least one actuator configured to selectively transform the at least one front nozzle between the forward position and the downward position.102.A pressure washing device, comprising:a lance configured to emit pressurized fluid; anda nozzle attachment configured to removably couple to the lance, the nozzle attachment comprising:a fluid inlet configured to receive pressurized fluid emitted by the lance,a first fluid outlet configured to emit received pressurized fluid along a first trajectory, anda second fluid outlet configured to emit received pressurized fluid along a second trajectory different than the first trajectory,wherein the first trajectory and the second trajectory are offset from each other by at least 45 degrees.103.The pressure washing device of claim 102, wherein the lance includes a barrel defining a primary flow axis, and wherein the first trajectory is substantially aligned with the primary flow axis.104.The pressure washing device of claim 102, wherein the first trajectory and the second trajectory are offset from each other by greater than 60 degrees.105.The pressure washing device of claim 104, wherein the first trajectory and the second trajectory are offset from each other by greater than 120 degrees.106.The pressure washing device of claim 105, wherein the first trajectory and the second trajectory are offset from each other by approximately 180 degrees.107.The pressure washing device of claim 102, wherein at least one of the first fluid outlet and the second fluid outlet is individually pivotable relative to the fluid inlet to adjust a respective first trajectory or second trajectory thereof.108.The pressure washing device of claim 102, wherein the nozzle attachment includes at least one target guide configured to contact a target object disposed at an intersection of the first trajectory and the second trajectory.109.The pressure washing device of claim 108, wherein the at least one target guide comprises a plurality of bristles configured to contract the target object.
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