Suction cleaning apparatus

Claim 1

A suction cleaning device comprising; a cleaning nozzle, a first suction tube attached to said nozzle, a liquid supply tube, one end whereof opens into said nozzle and the other end whereof communicates with a liquid supply reservoir, a container attached to said first suction tube, a second suction tube for connecting said container with a source of suction housed in a recess at the base of said container, said container being arranged so as to function in use as a separator removing and collecting used liquid from air passing through said container from the cleaning nozzle, a cover for said container having a tangential inlet union in the side thereof for detachable connection with said first suction tube, and an inlet port for connecting said container with said suction tube; said liquid supply reservoir being located within said container and suspended from said cover by an elongated neck passing through a central aperture in said cover adapted to provide communication between the atmosphere and said second suction tube, said elongated neck being normally adapted to seal said central aperture, but arranged to unseal said aperture and close the inlet port connecting the container with the second suction tube when the liquid supply reservoir is raised; a tube passing through an aperture in the reservoir opening upwardly into an upper portion of the liquid supply reservoir, one end of said tube communicating with the recess housing the source of suction at the pressure end thereof; the other end communicating with the top of the elongated neck, whereby the liquid supply reservoir is pressurized, the liquid supply reservoir, in operation of the device, being emptied of liquid and the container filled with soiled liquid, whereby the liquid supply reservoir is raised when a predetermined level of liquid in the container is reached, thus causing closure of the inlet port to the second suction tube, so that vacuous conditions are no longer obtained at the nozzle.