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Surface cleaning apparatus

  • US 10,376,123 B2
  • Filed: 03/17/2017
  • Issued: 08/13/2019
  • Est. Priority Date: 12/18/2012
  • Status: Active Grant
First Claim
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1. A surface cleaning apparatus, comprising:

  • a housing adapted for movement across a surface to be cleaned;

    a supply tank for holding a supply of liquid;

    a distributor for delivering fluid to the surface to be cleaned;

    a regulator tank fluidly coupled to the supply tank to regulate a flow of liquid from the supply tank to the distributor, the regulator tank comprising;

    a chamber for holding a volume of liquid from the supply tank and a volume of air;

    a vent in fluid communication with ambient air for venting ambient air into the chamber; and

    a tank outlet in fluid communication with the distributor;

    a conduit extending through the chamber of the regulator tank and having an inlet end in fluid communication with the supply tank and an outlet end in fluid communication with the tank outlet; and

    at least one port provided in the conduit between the inlet end and outlet ends of the conduit;

    wherein the at least one port is in fluid communication with the chamber and the conduit is fluidly isolated from the chamber save for the at least one port and wherein as liquid flows out of the supply tank, the at least one port exchanges liquid and air between the chamber and the supply tank to regulate a steady flow of liquid through the outlet regardless of the volume of liquid in the supply tank.

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