Patent ID: 7793865
Filing Date: 2010-09-14
Classification: E03B

Abstract:
1. A system for antifreeze foam injection into a carwash bay conduit between uses of the conduit to dispense a freezable fluid in a carwash process, the system comprising: a container, the container containing a first mixture of antifreeze liquid and a foam surfactant; an air compressor configured to create pressurized air; a pump operable to pump the first mixture from the container; an antifreeze manifold carrying the first mixture; an air manifold carrying the pressurized air; a junction of the antifreeze manifold and the air manifold, the junction configured to combine the first mixture and the pressurized air to form a second mixture, wherein the second mixture comprises antifreeze foam; and an outlet conduit configured to receive the second mixture, the outlet conduit including an outlet configured to vent the freezable fluid as the freezable fluid is at least partially displaced from the outlet conduit by the second mixture.