In one aspect, an autonomous cleaning robot includes a drive configured to propel the robot along the floor surface and a tank assembly. The tank assembly includes a reservoir, left and right receptacles, and a handle extending across a cover of the tank assembly, the handle being moveable between a first position and a second position, wherein when the handle is in the second position, the tank assembly is locked in position. The tank assembly also includes left and right latch assemblies receivable by the left and right receptacles, respectively. Each latch assembly includes a moveable assembly configured to lock the tank assembly in position when the handle is in the second position.

A surface cleaner includes a suction source that generates a suction airflow to draw liquid-laden air along a fluid flow path from a dirty air inlet to a recovery tank. The recovery tank includes a chamber for storing liquid, an inlet along the fluid flow path, an outlet aperture along the fluid flow path, and a float having an indicator. An inflow path upstream of the inlet connects the dirty air inlet to the recovery tank. The float moves between a first position spaced away from the outlet aperture allowing air to exit the recovery tank along the fluid flow path, and a second position adjacent the outlet aperture obstructing the fluid flow path. The indicator is visible to a user when the float is in the second position.

A surface cleaning apparatus is provided with a fluid delivery system for delivering a cleaning fluid to the surface to be cleaned. The fluid delivery system includes one or more fluid supply tanks for storing a supply of cleaning fluid, a fluid distributor for applying the cleaning fluid to the surface to be cleaned, and a fluid supply conduit for delivering the cleaning fluid from the fluid supply tank to the fluid distributor.

A floor cleaner including a recovery. The recovery tank is configured to contain a fluid drawn through a suction inlet from a surface to be cleaned by a vacuum source. The recovery tank includes a shutoff float. The shutoff float is movable between a first position and a second position. The shutoff float includes a float body, a float closure, and a first interconnecting member. The first interconnecting member engages a second interconnecting member to retain the float in the first position. In the first position, the shutoff float is spaced a distance from the suction air outlet, allowing air flow through the suction air outlet. The first interconnecting member engages the second interconnecting member to retain the shutoff float in the first position. In the second position, the shutoff float is adjacent the suction air outlet, inhibiting air flow through the suction air outlet.

A fluid delivery system for a surface cleaning apparatus includes a fluid container configured for storing a fluid, a fluid distributor configured for delivering the fluid to a surface to be cleaned, and a flow controller configured for controlling a flow of the fluid from the fluid container to the fluid distributor. The flow controller includes an adjustable valve and is configured for operating in a first mode of operation that supplies the fluid to the fluid distributor at a first volumetric flow rate; a second mode of operation that supplies the fluid to the fluid distributor at a second volumetric flow rate that is lower than the first volumetric flow rate; and a third mode of operation that supplies the fluid to the fluid distributor at a third volumetric flow rate that is lower than the second volumetric flow rate.

A surface cleaning apparatus includes a recovery tank, a suction nozzle in fluid communication with the recovery tank, and a suction source in fluid communication with the suction nozzle and the recovery tank to generate a working air path to transport debris-containing fluid including air and liquid from the suction nozzle into the recovery tank. An air/liquid separator can be provided within the recovery tank for separating liquid from air in the debris-containing fluid.

A floor cleaner includes a recovery tank including an inflow path allowing liquid-laden air to enter the recovery tank, an outflow path allowing air to exit the recovery tank; and a chamber for storing liquid. The chamber includes an inlet, a separator that separates liquid from the liquid-laden air, an air outlet, and a float. The float includes a base and a valve with an indicator. The float is moveable between a first position and a second position. In the first position the valve is spaced away from the air outlet and air is allowed to exit the chamber. In the second position the valve is adjacent the outlet and impedes air from exiting the chamber. In the second position the indicator is visible when the chamber is full.

A surface cleaning apparatus includes a recovery tank, a suction nozzle in fluid communication with the recovery tank, and a suction source in fluid communication with the suction nozzle and the recovery tank to generate a working air path to transport debris-containing fluid including air and liquid from the suction nozzle into the recovery tank. An air/liquid separator can be provided within the recovery tank for separating liquid from air in the debris-containing fluid.

The present invention relates to the field of floor treatment machines which involve wet treatment of a floor or carpet in which dirty liquid is collected by suction. In one aspect there is provided a float valve assembly for a collection tank in a suction liquid collection device, the assembly comprising: a float constrained in an enclosure which is configured to permit the float to rise in response to a rising liquid level, a closure feature disposed above the float and connected thereto so that as the float rises the closure feature rises from an initial position, wherein a suction port is disposed in the tank vertically spaced apart from the initial position of the closure feature, the suction port being in fluid communication with a suction drive which in use draws air-entrained liquid into the collection tank, the arrangement being such that as liquid fills the tank the liquid acts upon the float to cause the closure feature to travel towards the suction port, and when the closure feature rises sufficiently, the closure feature obturates the suction port, thereby closing the suction port and preventing further air-entrained liquid from entering. The closure feature may be connected to the float by a plunger which is disposed above the float so that the float shunts the plunger to travel in an upwards direction as the float rises.

The present invention is directed to a vacuum including a dust extraction system. The system includes a filter assembly, an airflow generation assembly, and valve assembly. The airflow generation assembly is configured to draw contaminated air toward the filter assembly and exhaust filtered air as a discharge stream. The filter assembly is configured to remove contaminants from the contaminated airflow by capturing particulate material suspended within the airflow. The valve assembly is configured to selectively direct filtered airflow into the filter assembly such that the filtered air stream cleans the filter.