Liquid Extraction Cleaning Device

• US 20150245752A1
• Filed: 02/04/2015
• Published: 09/03/2015
• Est. Priority Date: 02/28/2014
• Status: Active Grant

• Current Assignee: Rug Doctor
• Original Assignee: Rug Doctor
• Inventors: Wall, Timothy, Morrow, Ann Marie, Haug, Walter, Le, Phuong, Ostendorf, Charles Michael, Pereira, Schubert, Chavana, Ernest Matthew Jr., Lau, Vincent, Hill, Jason Edward, Tilk, Jason, Spirk, Evan, Tufts, Lindsey, Saunders, Craig, Stephens, Paul
• Granted Patent: US 9,538,893 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A47L 11/34 Machines for treating carpets in position by liquid, foam, or vapour, e.g. by steam
• CPC Class Codes: A47L 11/4002 Installations of electric equipment
• CPC Class Codes: A47L 11/4036 Parts or details of the surface treating tools
• CPC Class Codes: A47L 11/4075 Handles; levers
• CPC Class Codes: A47L 11/4083 Liquid supply reservoirs; Preparation of the agents, e.g. mixing devices
• CPC Class Codes: A47L 11/4088 Supply pumps; Spraying devices; Supply conduits
• CPC Class Codes: A47L 9/0411 driven by electric motor
• CPC Class Codes: A47L 9/0488 Combinations or arrangements of several tools, e.g. edge cleaning tools

Abstract

A liquid extraction cleaning device comprises a vacuum pump, a liquid pump, a cleaning solution tank, a recovery tank, first and second spray nozzles, a spray selection switch, a vacuum inlet port, an agitator assembly, and a handle. The spray selection switch controls whether liquid is expelled from the second spray nozzle when liquid is expelled from the first spray nozzle. The agitator assembly comprises first and second agitators. The first agitator is configured to rotate. The second agitator is configured to reciprocate. The handle is pivotally connected to the rest of the liquid extraction cleaning device and is lockable in several pivotal orientations. The handle can also be pivoted forward from a rearwardly extending direction to an extent that it extends forward horizontally.

Claims

1-12. -12. (canceled)

13. A liquid extraction cleaning device comprising:

a main unit comprising a vacuum pump,

a liquid pump, an agitator assembly, and a spray nozzle, the agitator assembly comprising an agitator, the spray nozzle being operatively connected to the liquid pump in a manner such that the liquid pump is capable of forcing cleaning liquid out of the spray nozzle;

a cleaning solution tank, the cleaning solution tank being configured and adapted to store a cleaning liquid, the cleaning solution tank being operatively connected to the liquid pump in a manner such that the liquid pump can draw cleaning liquid from the cleaning solution tank;

a recovery tank, the recovery tank being configured and adapted to store soiled cleaning liquid extracted from a floor, the recovery tank being operatively connected to the vacuum pump in a manner such that the vacuum pump can draw air from the recovery tank;

a vacuum inlet port, the vacuum inlet port being operatively connected to the recovery tank and the vacuum pump in a manner such that the vacuum pump is capable of drawing fluid through the vacuum inlet port and into the recovery tank, the agitator being configured and adapted to move relative to the inlet port; and

an adjustable handle, the handle being pivotally connected to the main unit and comprising a locking mechanism and a release member, the locking mechanism being configured and adapted to lock the handle in each of a plurality of pivotal orientations relative to the main unit, the release member being configured and adapted to release the locking mechanism in a manner allowing the handle to pivot relative to the main unit.

14. A liquid extraction cleaning device in accordance with claim 13 wherein the main unit has a front, a rear, a top, and a bottom, the vacuum inlet port is located adjacent to the front and bottom of the main unit, the handle is connected adjacent to the rear and top of the main unit, and the handle can pivot forward to at least an extent that the handle is parallel to the bottom of the main unit.

15. A liquid extraction cleaning device in accordance with claim 14 wherein the front of the main unit is a first distance from the rear of the main unit, and the handle is no more than a second distance from the bottom of the main unit when the handle is pivoted forward to an extent that the handle is parallel to the bottom of the main unit.