Patent ID: 6880199
Filing Date: 2005-04-19
Classification: A47L

Abstract:
1. An extraction cleaning machine comprising: a housing; a cleaning solution dispensing system mounted to the housing and including: a cleaning solution tank for holding a liquid cleaner to be applied to a surface to be cleaned; a fluid dispenser for dispensing the liquid cleaner onto a surface to be cleaned; and a liquid cleaner conduit between the cleaning solution tank and the fluid dispenser for passing liquid from the cleaning solution tank to the fluid dispenser; a fluid recovery system mounted to the housing for recovering expended cleaning solution from the surface to be cleaned and including: a suction nozzle associated with the housing for retrieving soiled liquid from the surface to be cleaned; a recovery tank for collecting recovered soiled liquid; a working air conduit in fluid communication with the suction nozzle and the recovery tank; and a suction source in communication with the suction nozzle, the working air conduit and the recovery tank for withdrawing a liquid and air mixture from the surface to be cleaned through the suction nozzle and the working air conduit and depositing soiled liquid in the recovery tank; the improvement which comprises: the cleaning solution tank and the recovery tank both comprise a flexible membrane whereby the recovery tank can expand as recovered fluid is received therein and the cleaning solution tank can collapse as the cleaning fluid is dispensed therefrom; and wherein the dispensing tank and the recovery tank are adjacent to one another in a common space and positioned so that the dispensing tank collapses as the recovery tank expands.