Patent ID: 7784311

Claim:
An instantaneous mixing device ( 10 ) for injection/extraction cleaning machines of the type equipped with at least one washing accessory ( 13 ) and/or at least one pre-washing accessory ( 30 ) connected to the outlet of a hydraulic circuit ( 20 ), said device ( 10 ) comprising: at least one tank for water ( 15 ) and at least one tank for a detergent product ( 16 ), connected to said hydraulic circuit ( 20 )said one tank comprising: at least one spray pump ( 12 ): at least one mixing element ( 14 ) with a Venturi effect connected downstream of said at least one water tank ( 15 ) and at least one tank for a detergent ( 16 ), wherein said spray pump ( 12 ) is positioned downstream of said water tank( 15 ) and upstream of said at least one mixing element ( 14 ): at least one throttle element ( 17 , 17 ′) for effecting the nominal dilution of the detergent, situated upstream of said at least one mixing element ( 14 ); at least one on-off valve ( 18 ) to prevent the circulation of the detergent in the circuit ( 20 ), downstream of said at least one mixing element ( 14 ); an additional branch ( 21 ) for the collection of water from said at least one water tank ( 15 ) and the introduction of said collected water downstream of said at least one mixing element ( 14 ), wherein said additional branch ( 21 ) is adapted to regulate the flow-rate of the solution supplied and a second on-off valve ( 28 ) for preventing the circulation downstream of said additional branch ( 21 ).