Patent ID: 7203994

Claim:
A vacuum cleaning device powered by compressed air, comprising: a canister forming an internal chamber having a top and a bottom; a venturi and nozzle assembly in fluid flow communication with the internal chamber and adapted to be connected to a source of compressed air whereby compressed air is directed from the nozzle through the venturi to create a vacuum in the internal chamber and having an outlet for air passing through the venturi; a vacuum intake pipe connected in fluid flow communication with the internal chamber; a drain opening at the bottom of the chamber for draining liquid and debris from the chamber; means for closing the drain opening to prevent liquid and debris in the chamber from draining through the drain opening and for opening the drain opening when desired to drain liquid and debris from the chamber; and an auxiliary tank for holding a cleaning agent, means for pressurizing the auxiliary tank, a hose extending from the auxiliary tank, and a nozzle and valve assembly on the hose for spraying cleaning agent from the auxiliary tank.