A pressure washer includes a main line through which, via a high-pressure pump, liquid can be conveyed to a spray opening, and a main valve. The main valve, when in a closed state, prevents liquid from flowing through the main line and, when in an open state, allows liquid to flow through the main line. The main valve is switchable between open and closed via an operator-controlled element. The main line has a suction chamber between the connection and the pump and a pressure chamber between the pump and the spray opening. The pressure chamber is fluidically connected to the suction chamber via a bypass line. A free cross-sectional area of the bypass line is settable via a bypass valve in the bypass line for regulating pressure in the pressure chamber. The bypass valve is adjustable via the operator-controlled element for setting the free cross-sectional area of the bypass line.

A manually operated pressure fluid device has a housing structure which receives a motor-pump group and has a fluid inlet connected to the pump on the intake side and a fluid outlet formed on a nozzle unit and connected to the pump on the delivery side, an electrical power source and a control element acting on the power supply of the motor. The motor of the motor-pump group is a brushless DC motor and the pump is a whirling rotor pump having two lock washers, each having an annular face spline, where the number of teeth of the two face splines intermeshing with each other differ from each other by one and the lock washers arranged at an angle relative to each other wander relative to each other such that the face splines delimit a plurality of pump chambers which increase and reduce in size during pump operation.

A system for combining and spraying fluids that includes a principal reservoir for holding a carrier fluid; an electric pump in communication with the principal reservoir; a power source for energizing the pump selectable between a rechargeable 12-volt battery and a 110-volt AC line; at least one auxiliary reservoir for holding an auxiliary fluid to be controllably mixed with carrier fluid being drawn from the principal reservoir; a selector valve for selecting which if any of the auxiliary fluid(s) are to be combined with the carrier fluid; a Venturi tube for combining streams of carrier fluid and selected auxiliary fluid(s) in a predetermined ratio which may be varied as desired; and a spray wand in fluid communication with the Venturi tube for discharging the selected fluids.

A method for stripping a coating off of a blade includes discharging liquid nitrogen through a nozzle onto the blade at a coating to cause lifting of the coating from a substrate of the blade and traversing the nozzle along the blade to cause peeling of the coating off of the substrate of the blade as the nozzle traverses the blade.

The invention relates to a high pressure cleaning system including a high pressure cleaning appliance operable with at least one variable operating parameter that has a pump assembly, at least one accessory that is in or is bringable into flow connection with a high pressure outlet of the pump assembly, an input unit, at least one control unit coupled to the input unit, and an output unit coupled to the at least one control unit, wherein an object to be cleaned is specifiable by the input unit and a cleaning recommendation is providable on the output unit by the at least one control unit in dependence on the specification, and wherein at least one interaction element is provided for the user, linked to the cleaning recommendation, on the output unit for transmitting interaction information to the at least one control unit, in particular in dependence on the cleaning recommendation.

A system for combining and spraying fluids that includes a principal reservoir for holding a carrier fluid; an electric pump in communication with the principal reservoir; a power source for energizing the pump selectable between a rechargeable 12-volt battery and a 110-volt AC line; at least one auxiliary reservoir for holding an auxiliary fluid to be controllably mixed with carrier fluid being drawn from the principal reservoir; a selector valve for selecting which if any of the auxiliary fluid(s) are to be combined with the carrier fluid; a Venturi tube for combining streams of carrier fluid and selected auxiliary fluid(s) in a predetermined ratio which may be varied as desired; and a spray wand in fluid communication with the Venturi tube for discharging the selected fluids.

A method for cleansing a desired skin surface, and a device therefor, can include a base to house a jar for the cleansing liquid, a jar for the removed liquid and debris, a pump to deliver the cleansing liquid to a wand applicator, and a pump to suction the cleansing liquid and debris removed from the desired skin surface. The two pumps can be driven by separate motors to allow a user to separately control the amount of liquid dispensed and the magnitude of the suction force applied. The device can also include an infusion enhancer that assists in the opening of the pores of the desired skin surface or by tightening the desired skin surface. The device can further include a self-cleaning tip that allows a cleaning solution to be immediately recycled through the system into the jar for the removed liquid and debris.

The present invention relates to a hydro auger post hole cleaner. The invention allows for more efficient removal of residual debris from auger-drilled holes. The system can be combined with augers incorporated into engine-mounted machines such as, but not limited to, skid steers, pressure diggers, backhoes and crane diggers. The system uses a toggle-operated pump powered by the machine's battery and controlled with a relay and switch to pump water from water tanks through a water hose to the drill auger on the engine-mounted machine's arm and into an auger-drilled hole. Water causes the debris in the hole to conglomerate and adhere to the auger. The auger is removed from the hole and the adhered conglomeration is removed from the auger, thereby, removing debris from the hole without manual effort.

Provided is a pump apparatus capable of suppressing an unintentional ejection of a high-pressure liquid from a nozzle. A pump apparatus including: an injection chamber having a door; a nozzle arranged in the injection chamber; a pump connected to the nozzle for discharging liquid; a motor for driving the pump; a door sensor for detecting that the door is closed; and a control device capable of communicating with the door sensor, the control device having a motor rotation unit for supplying driving power to the motor only when the door sensor detects that the door is closed.

An adaptive communication system integrated into the wash functions of a carwash is provided. The adaptive communication system embodies a programmable input relay board coupled to a digital sound trigger board retrievably storing a plurality of communication events. Each wash function is adapted to transmit an output signal upon being engaged. The programmable input relay board is adapted to receive such output signals and interface with the digital sound trigger board so as to selectively activate one or more of the plurality of communication events.