Patent ID: 6227460
Filing Date: 2001-05-08
Classification: B08B,B60S,F02B

Abstract:
A mobile cleaning unit for use, selectively, by a single operator or by two operators independently of each other, comprising an engine, a pair of pumps constantly driven by the engine, the pumps each having an inlet and an outlet, a water storage supply, a line for supplying water from the water storage supply to each inlet of each pump, a plurality of chemical additive supply tanks, a separate coupler associated with each pump and adapted to connect a hose and spray nozzle, a separate unloader valve connected between the outlet of each pump and the associated one of said couplers, a separate device for delivery of a selected chemical additive to the water pumped by each pump, a separate return line associated with each unloader valve for returning water pumped by each pump to the water storage supply when the associated unloader valve is in an unloading mode, and a separate control valve associated with each return line operable between first and second positions, said control valve in said first position directing water flow from an associated unloader to the water storage supply and in said second position directing water from the associated unloader to the inlet of the associated pump.