Patent ID: 8549697
Filing Date: 2013-10-08
Classification: A47L

Abstract:
1. An unattended extraction cleaning machine comprising: a housing with a bottom portion that is adapted to rest on a surface to be cleaned and that defines an opening in an underside of the housing; a fluid delivery system mounted to the housing and including a fluid distributor for delivering a cleaning fluid to the surface to be cleaned beneath the opening in the underside of the housing; a fluid extraction system including a suction nozzle for recovering soiled cleaning fluid from the surface to be cleaned beneath the opening in the underside of the housing; a carriage assembly mounting the suction nozzle to the housing for movement with respect thereto and with respect to the surface to be cleaned; a steam boiler mounted on the housing and comprising a steam delivery system for supplying steam or heated liquid the surface to be cleaned; and a controller programmed with a timed duty cycle and operatively coupled to the steam boiler to selectively control the steam boiler in accordance with the timed duty cycle to generate the steam or heated liquid that is supplied the surface to be cleaned within the timed duty cycle.