Combination dirty fluid tank and nozzle for a carpet extractor

• US 6,325,864 B1
• Filed: 08/07/2000
• Issued: 12/04/2001
• Est. Priority Date: 01/08/1999
• Status: Expired due to Term

• Current Assignee: Royal Appliance Manufacturing Company (Techtronic Industries Company Limited)
• Original Assignee: Royal Appliance Manufacturing Company (Techtronic Industries Company Limited)
• Inventors: Stephens, Paul D., Zahuranec, Terry L., Salo, Robert A.
• Primary Examiner(s): Moore, Chris K.
• Application Number:
  US09/633,221
• Time in Patent Office: 484 Days
• Field of Search: 153/20, 153/52, 153/22, 153/28, 153/53, 134/21
• US Class Current: 134/21
• 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 11/4016 specially adapted for collecting fluids
• CPC Class Codes: A47L 11/4075 Handles; levers
• CPC Class Codes: A47L 5/32 with means for connecting a hose hose couplings for suction cleaners A47L9/24
• CPC Class Codes: A47L 7/0009 with means mounted on the nozzle; nozzles specially adapted for the recovery of liquid
• CPC Class Codes: A47L 7/0028 Security means, e.g. float valves or level switches for preventing overflow
• CPC Class Codes: A47L 7/0038 with means for emptying the tanks
• CPC Class Codes: A47L 7/0042 Gaskets; Sealing means

Abstract

An upright carpet extractor for solution cleaning of floor and above floor surfaces has a low profile base assembly (A) including a base housing (10) and a recovery tank and nozzle assembly (18) removably mounted on the housing. The recovery tank and nozzle assembly includes a recovery tank (120, 552) for collecting recovered cleaning solution and a nozzle cover (134) which is attached to a forward portion of the recovery tank exterior to define a nozzle flowpath (138) therebetween. Working air and recovered cleaning solution are drawn through the nozzle flowpath and into the recovery tank by a motor and fan assembly (20,534) mounted to the base housing, rearward of the recovery tank. The nozzle flowpath is removed from the base together with the recovery tank when the recovery tank is to be emptied, allowing the nozzle flowpath to be rinsed conveniently to remove trapped dirt. A carrying handle (250), pivotally mounted to the recovery tank, selectively locks the recovery tank to the housing and locks a removable lid (204) of the recovery tank to the tank to seal a discharge opening (200).

Claims

1. A carpet extractor comprising:

a base including a distributor for selectively applying a cleaning solution to a floor surface to be cleaned;

a cleaning solution supply tank; and

,

a combined recovery tank and nozzle assembly removably mounted to the base including;

a nozzle for vacuuming dirty cleaning solution from the floor surface, and

a recovery tank, received in an upwardly open socket on the base, for receiving the dirty cleaning solution from the nozzle, the nozzle being connected with the recovery tank such that the nozzle and the recovery tank are removable together from the base without removal of the cleaning solution supply tank; and

,

a vacuum source communicating with the recovery tank and nozzle assembly for drawing a vacuum on the recovery tank and hence the nozzle.

2. The extractor of claim 1, wherein the combined recovery tank and nozzle assembly comprises a nozzle cover which is connected to an outer surface of the recovery tank to define a nozzle flowpath therebetween, the flowpath communicating with the nozzle.

3. The assembly of claim 2, wherein the nozzle cover and the outer surface of the recovery tank each includes at least a region formed from a transparent material adjacent the nozzle.

6. The extractor of claim 1, wherein the recovery tank includes a discharge opening for emptying dirty cleaning solution from the recovery tank, the discharge opening being selectively covered by a lid which communicates with the vacuum source.

7. The extractor of claim 6, wherein the lid includes a float cage and a moveable float, the float being confined in the cage and being configured for closing the discharge opening of the recovery tank from the lid when the dirty cleaning solution in the recovery tank reaches a preselected level.

10. The extractor of claim 6, wherein the inlet slot of the recovery tank defines an opening for selectively receiving a vacuum hose outlet tube of an accessory tool therethrough, such that the vacuum hose outlet tube closes the nozzle outlet, a closure member sealing the inlet slot opening when the outlet tube is not received in the inlet slot opening.

4. A carpet extractor comprising:

a base including a distributor for selectively applying a cleaning solution to a floor surface to be cleaned;

a cleaning solution supply tank; and

,

a combined recovery tank and nozzle assembly removably mounted to the base including;

a nozzle for vacuuming dirty cleaning solution from the floor surface,

a recovery tank for receiving the dirty cleaning solution from the nozzle, the nozzle being connected with the recovery tank such that the nozzle and the recovery tank are removable together from the base without removal of the cleaning solution supply tank, the recovery tank including an inlet slot which communicates with an interior of the recovery tank, and

a nozzle cover which is connected to an outer surface of the recovery tank to define a nozzle flowpath therebetween, the flowpath communicating with the nozzle, an upper end of the inlet slot being in fluid communication with the nozzle flowpath; and

a vacuum source communicating with the recovery tank and nozzle assembly for drawing a vacuum on the recovery tank and hence the nozzle.

5. The extractor of claim 4, wherein the inlet slot has an elongated rear wall.

8. A carpet extractor comprising:

a base including a distributor for selectively applying a cleaning solution to a floor surface to be cleaned;

a cleaning solution supply tank; and

a combined recovery tank and nozzle assembly removably mounted to the base including;

a nozzle for vacuuming dirty cleaning solution from the floor surface, and

a recovery tank for receiving the dirty cleaning solution from the nozzle, the nozzle being connected with the recovery tank such that the nozzle and the recovery tank are removable together from the base without removal of the cleaning solution supply tank, the recovery tank including;

a discharge opening for emptying dirty cleaning solution from the recovery tank, the discharge opening being selectively covered by a lid which communicates with the vacuum source, and

a movable handle, the handle being movable between a first functional position, in which the recovery tank is locked to the base, and a second functional position, in which the lid is removable from the recovery tank for emptying the recovery tank; and

a vacuum source communicating with the recovery tank and nozzle assembly for drawing a vacuum on the recovery tank and hence the nozzle.

9. The extractor of claim 8, wherein the recovery tank handle is movable to a third functional position, in which the recovery tank is removable from the base and the lid is locked to the recovery tank.

11. A carpet extractor comprising:

a base including a distributor for selectively applying a cleaning solution to floor surface to be cleaned;

a cleaning solution supply tank; and

a combined recovery tank and nozzle assembly removably mounted to the base including;

a nozzle for vacuuming dirty cleaning solution from the floor surface, and

a recovery tank for receiving the dirty cleaning solution from the nozzle, the nozzle being connected with the recovery tank such that the nozzle and the recovery tank are removable together from the base without removal of the cleaning solution supply tank;

a directing handle for directing the extractor over a floor surface, the directing handle being pivotally connected with the base and being pivotable between an upright position and a working position, the combined recovery tank and nozzle assembly being configured for removal from the extractor in both the upright and working positions; and

a vacuum source communicating with the recovery tank and nozzle assembly for drawing a vacuum on the recovery tank and hence the nozzle.

12. An upright carpet extractor comprising,:

a base assembly including;

a distributor for selectively applying the cleaning solution to a floor surface to be cleaned,

a vacuum source for drawing a vacuum;

a recovery tank,

a nozzle for vacuuming dirty cleaning solution from the floor surface, the nozzle including a nozzle cover a fluid flow path being defined between the nozzle cover and a front wall of the recovery tank and through the recovery tank to an inlet of the vacuum source, wherein the nozzle cover is secured to the recovery tank; and

,

a directing handle pivotally connected to said base assembly for manipulating the base assembly over a surface to be cleaned.

13. A method of extracting a cleaning solution from a floor surface with a carpet extractor having a combined recovery tank and nozzle assembly removably mounted in a base portion and a cleaning solution supply tank mounted on a handle portion, the method comprising the steps of:

delivering the cleaning solution to the floor from the cleaning solution supply tank;

applying a vacuum to a recovery tank of the recovery tank and nozzle assembly to draw the cleaning solution from the floor surface, through a nozzle of the recovery tank and nozzle assembly, and into the recovery tank mounted in a socket in the base portion;

removing the recovery tank and nozzle assembly as a unit from the carpet extractor without removal of the cleaning solution supply tank; and

,

emptying the cleaning solution from the recovery tank.

14. The method of claim 13, further comprising:

rinsing trapped dirt from the nozzle.

15. A method of extracting a cleaning solution from a floor surface with a carpet extractor having a combined recovery tank and nozzle assembly removably mounted in a base portion and a cleaning solution supply tank mounted on a handle portion, the method comprising the steps of:

delivering the cleaning solution to the floor from the cleaning solution supply tank;

applying a vacuum to a recovery tank of the recovery tank and nozzle assembly to draw the cleaning solution from the floor surface, through a nozzle of the recovery tank and nozzle assembly, and into the recovery tank;

removing the recovery tank and nozzle assembly as a unit from the carpet extractor without removal of the cleaning solution supply tank including;

moving a handle which is pivotally mounted to the recovery tank from a first position, in which the recovery tank and nozzle assembly is locked to the carpet extractor, to a second position, in which the recovery tank and nozzle assembly is removable from the extractor; and

emptying the cleaning solution from the recovery tank.

16. The method of claim 15, wherein in the second position, a lid of the recovery tank is locked to the recovery tank to seal a discharge opening in the recovery tank, and the step of emptying the cleaning solution includes:

moving the handle from the second position to a third position, in which the lid is removable from the recovery tank.

17. The method of claim 16, wherein the lid includes a float assembly and the step of emptying the cleaning solution includes removing the float assembly from the recovery tank discharge opening.

18. A carpet extractor comprising:

a base including a distributor for selectively applying a cleaning solution to a floor surface to be cleaned;

a handle pivotably secured to the base;

a cleaning fluid supply tank which supplies the cleaning solution to the distributor; and

a combined recovery tank and nozzle cover removably mounted to the base including;

a recovery tank for receiving the dirty cleaning solution from the floor,

a nozzle cover which is connected to an outer surface of the recovery tank to define a nozzle flowpath therebetween, the flowpath communicating with a nozzle opening adjacent the floor and with the recovery tank to deliver cleaning fluid from the floor to the recovery tank, the nozzle cover and the recovery tank being removable together from the base; and

a vacuum source communicating with the recovery tank and nozzle assembly for drawing a vacuum on the recovery tank and hence the nozzle flowpath and nozzle opening.

19. A combination dirty fluid tank and nozzle assembly for a carpet extractor of the type which applies a cleaning solution to a floor surface and vacuums dirty cleaning solution from the floor surface through a nozzle opening adjacent the floor surface, the dirty fluid tank and nozzle assembly being selectively mounted on a base of the carpet extractor, the dirty fluid tank being receivable in a socket on the base, the assembly comprising:

a recovery tank which includes a chamber for receiving the dirty cleaning solution from the nozzle opening; and

a nozzle cover removably secured to the recovery tank and defining a fluid flowpath between the nozzle cover and a front wall of the recovery tank, the flowpath being in fluid communication with the recovery tank chamber and the nozzle opening.