Liquid extraction cleaning device and method

• US 9,788,700 B2
• Filed: 01/29/2015
• Issued: 10/17/2017
• 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, Jr., Ernest Matthew, Lau, Vincent, Hill, Jason Edward, Tilk, Jason, Spirk, Evan, Tufts, Lindsey, Saunders, Craig, Stephens, Paul
• Primary Examiner(s): NGUYEN, DUNG V
• Application Number:
  US14/608,634
• Publication Number:
  US 20150245757A1
• Time in Patent Office: 992 Days
• CPC Class Codes: A47L 11/201 with supply of cleaning agents
• CPC Class Codes: A47L 11/202 having separate drive for the cleaning brushes
• CPC Class Codes: A47L 11/307 having reciprocating tools
• 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 11/4008 Arrangements of switches, indicators or the like
• CPC Class Codes: A47L 11/4036 Parts or details of the surface treating tools
• CPC Class Codes: A47L 11/4044 Vacuuming or pick-up tools; Squeegees
• CPC Class Codes: A47L 11/4072 Arrangement of castors or wheels
• CPC Class Codes: A47L 11/4075 Handles; levers
• CPC Class Codes: A47L 11/4088 Supply pumps; Spraying devices; Supply conduits

Abstract

A liquid extraction cleaning device comprises a main unit, a liquid pump, a flexible hose, and a hand tool. The main unit comprises a vacuum pump. The hand tool comprises a vacuum inlet port, an agitator, a spray nozzle, and a grip portion. The vacuum inlet port of the hand tool is operatively connected to the vacuum pump via the hose passageway in a manner such that the vacuum pump is capable of drawing fluid through the vacuum inlet port and into the hose passageway. The spray nozzle is operatively connected to the liquid pump in a manner such that the liquid pump is capable of forcing liquid out of the spray nozzle.

Claims

1. A liquid extraction cleaning device comprising:

a main unit comprising a vacuum pump and a hose storage receptacle;

a liquid pump;

a flexible hose surrounding a hose passageway, the flexible hose being operatively connected to the vacuum pump in a manner such that the vacuum pump is capable of drawing fluid through the hose passageway, at least a majority of the flexible hose being selectively storable in the hose storage receptacle, the hose storage receptacle being oriented on the main unit such that a majority of the flexible hose can be selectively removed from hose storage receptacle from one side of the liquid extraction cleaning device;

a hand tool, the hand tool comprising a vacuum inlet port and a spray nozzle, the hand tool being connected to the main unit by the flexible hose such that the hand tool is movable relative to the main unit, the vacuum inlet port being operatively connected to the vacuum pump via the hose passageway in a manner such that the vacuum pump is capable of drawing fluid through the vacuum inlet port and into the hose passageway, the spray nozzle being operatively connected to the liquid pump in a manner such that the liquid pump is capable of forcing liquid out of the spray nozzle;

wherein the main unit comprises a base and an upper shell, the upper shell is attached to and above the base, and the base and the upper shell collectively form the hose storage receptacle.

2. A liquid extraction cleaning device in accordance with claim 1 wherein the main unit has front, left, right, and rear sides, the liquid extraction cleaning device comprises a pair of wheels, the pair of wheels are mounted to the left and right of the base adjacent the rear of the base, and the hose storage receptacle is formed on the front of the base.

3. A liquid extraction cleaning device in accordance with claim 2 wherein the liquid extraction cleaning device comprises a recovery tank and a cleaning liquid tank, and the upper shell is configured and adapted such that the recovery tank and the cleaning liquid tank can be removably mounted adjacent the front of the upper shell and above the hose storage receptacle.

4. A liquid extraction cleaning device in accordance with claim 3 wherein the liquid extraction cleaning device comprises a telescoping tow handle attached to the rear of the main unit, and the telescoping tow handle is selectively adjustable between a retracted configuration and an extended configuration.