Liquid Extraction Cleaning Device

• US 20150245751A1
• 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 9,717,386 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. A liquid extraction cleaning device comprising:

a vacuum pump;

a liquid pump;

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 spray nozzle, 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 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; and

an agitator assembly, the agitator assembly comprising first and second agitators and an electric motor, the first agitator being operatively connected to the electric motor in a manner such that operation of the electric motor causes the first agitator to rotate relative to the vacuum inlet port, the second agitator being operatively connected to the electric motor in a manner such that operation of the electric motor causes the second agitator to reciprocate relative to the vacuum inlet port.

2. A liquid extraction cleaning device in accordance with claim 1 wherein the second agitator is operatively connected to the electric motor via the first agitator in a manner such that rotation of the first agitator mechanically drives reciprocation of the second agitator.

3. A liquid extraction cleaning device in accordance with claim 1 wherein the first and second agitators are located between the vacuum inlet port and the spray nozzle.

4. A liquid extraction cleaning device in accordance with claim 1 wherein the second agitator is operatively connected to the electric motor in a manner such that operation of the electric motor causes the second agitator to pivotally reciprocate about a reciprocation axis.

5. A liquid extraction cleaning device in accordance with claim 1 wherein the first agitator is movable vertically relative to the vacuum inlet port.

6. A liquid extraction cleaning device in accordance with claim 5 wherein the second agitator is operatively connected to the electric motor in a manner such that operation of the electric motor causes the second agitator to pivotally reciprocate about a reciprocation axis, and the reciprocation axis is fixed in position relative to the vacuum inlet port.

7. A liquid extraction cleaning device in accordance with claim 6 wherein the first agitator is confined to move along an arc path when the first agitator moves vertically relative to the vacuum inlet port.

8-15. -15. (canceled)