Patent ID: 6446302
Filing Date: 2002-09-10
Classification: A47L

Abstract:
An extraction surface cleaning apparatus having:a housing; at least two wheels mounted to the housing for supporting the housing for movement along a surface to be cleaned; a liquid dispensing system mounted to the housing and including: a liquid dispensing nozzle for applying liquid to the surface to be cleaned; a fluid supply chamber for holding a supply of cleaning fluid; a fluid supply conduit fluidly connected to the fluid supply chamber and to the dispensing nozzle for supplying fluid to the dispensing nozzle; a fluid recovery system mounted to the housing and including: a recovery chamber for holding recovered fluid, a suction nozzle, a working air conduit extending between the recovery chamber and the suction nozzle; and a vacuum source in fluid communication with the recovery chamber for generating a flow of working air from the suction nozzle through the working air conduit and through the recovery chamber to thereby draw dirty liquid from the surface to be cleaned through the suction nozzle and the working air conduit, and into the recovery chamber; a variable cleaning control element mounted on the housing and adjustable to control the rate of cleaning by the extraction surface cleaning apparatus; the improvement comprising: a sensor mounted to the housing for detecting a condition of the surface to be cleaned and for generating a condition signal representative of the detected condition of the surface to be cleaned.