Patent ID: 6951222

Claim:
A radiator cleaning device comprising: ( 1 , 2 , 3 , 4 , 5 and 6 ) a first tank for preserving fresh fluid adapted to be filled into a radiator; a second tank adapted to collect used fluid from the radiator; a discharge hose adapted to be connected to an outlet of the radiator, the discharge hose being selectively connectable to the second tank for discharging the used fluid into the second tank; an intake hose adapted to be connected to an inlet of the radiator, the intake hose being selectively connectable to the first tank for receiving the fresh fluid therefrom; first means for generating a vacuum inside the second tank to forcibly draw the used fluid from the radiator into the second tank via the discharge hose and for generating a pressure inside the first tank to forcibly drive the fresh fluid from the first tank into the radiator via the intake hose; and second means for switching the used fluid flowing from the discharge hose from moving toward the second tank into moving toward the intake hose; wherein the second means comprises a three-way valve connected to the discharge hose, the three-way valve being connected to the intake hose and the second tank respectively by a ball valve; wherein second means further comprises a filtering device connected between the three-way valve and the intake hose for filtering the fluid flowing from the discharge hose toward the intake hose; wherein an inlet port is mounted to the filtering device for receiving a cleaning agent that entrains the fluid flow from the discharge hose to the intake hose for cleaning the radiator; wherein the filtering device and the first tank are connected to the intake hose by a three-way valve, a ball valve being mounted between the three-way valve and the first tank; and wherein the first means comprises a six-way valve having first, second, third, fourth, fifth and sixth ports, the first port being connected to the first tank, the second port being connected to a vacuum port of a vacuum generating device, the third and fourth ports being connected to each other by a pressure regulator, the fifth port being adapted to connect to an external pressure source, the sixth port being connected to the second tank, the vacuum generating device having a pressure port connected between the first tank and the first port of the six-way valve by a three-way valve whereby a vacuum is applied by the first means to the second tank and a pressure is applied to the first tank by the first means.