Patent ID: 7824120

Claim:
A handheld surface cleaning apparatus comprising: a housing; a cleaning solution reservoir assembly mounted to the housing and including a solution container for storing a predetermined amount of a cleaning fluid and a solution dispenser assembly connected to the solution container through an orifice in the solution container for delivering the cleaning fluid in the solution container to a surface to be cleaned; the solution dispenser assembly includes a vent tube having a length within the solution dispenser assembly and an end portion adapted to extend into an air space within the solution reservoir when the solution reservoir is less than completely filled with the cleaning fluid; a float mounted to the end portion of the vent tube; wherein the vent tube is configured so that at least the vent tube end portion extends into the air space regardless of the orientation of the housing with respect to the horizontal; and wherein the vent tube has a weight mounted to a central portion of the length thereof and spaced from the float.