Engine cooling system power flush with flush liquid filtering and recirculation

Claim 1

In combination with an internal combustion engine cooling system that includes a liquid coolant heat radiator and liquid coolant pump, flushing apparatus comprising: (a) first means to produce a pressurized flow of flushing liquid and entrained gas bubbles, (b) a series of flow ports selectively connectible to different points in said system, utilizing appropriate adaptors and (c) control means operable to direct said flow from said first means and via said ports in different modes relative to said radiator and to coolant passages in the engine, the improvement comprising: (d) filter means having an intake to receive said flow after it passes through at least one of the engine and radiator and to filter the received flow, (e) means including a pump having an intake operatively connected with the filter means to receive filtered flow therefrom, and having a discharge directly connected to said first means, (f) and additional means for removing air bubbles from the flow re-supplied to said first means, said additional means including a tank having an inlet to directly receive the flow from the pump, and wherein the flow is allowed to release air bubbles to atmosphere, the filter means being outside liquid in the tank, and including a line connecting the tank to the filter means to pass liquid from the tank to the filter means intake, (g) said additional means including additional lines to directly and controllably supply the flow, after it passes through at least one of the engine and radiator, to each of: (i) the filter means intake, an (ii) said tank.