Valve assembly for carpet extractor

• US 6,073,300 A
• Filed: 01/08/1999
• Issued: 06/13/2000
• 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: Zahuranec, Terry L., Boll, David J.
• Primary Examiner(s): Snider, Theresa T.
• Application Number:
  US09/227,671
• Time in Patent Office: 522 Days
• Field of Search: 15/320, 15/321, 15/334, 15/328, 239/302, 239/375, 239/443, 239/444, 239/446, 239/569, 137/878, 137/881, 251/149.6
• US Class Current: 15/320
• 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

Abstract

A carpet extractor valve assembly (340,522) alternately directs cleaning solution to a base-mounted spray bar (74,526) or to a remote distributor (438,614) of an accessory tool (16,524). The valve assembly includes an inlet port (344), which receives cleaning fluid from a handle-mounted reservoir (14,574), and first and second discharge ports (400, 442), connected to the spray bar and the accessory tool, respectively. First and second valve members (352,354) include first and second poppets (362, 444), which are biased by a spring (384) to normally-closed positions in which the first and second discharge ports are sealed. A trigger-operated actuation rod (410) actuates the first valve member to release cleaning fluid to the spray bar. A quick connect coupling (464,466,608,610) connects the remote distributor with the second discharge port and opens the second valve member thereby. In one embodiment, a cleaning solution pump (480), mounted in a pump housing (490) over a base assembly A, is coupled between the valve assembly (340) and the remote distributor (438). In another embodiment, a pump (520) is connected between a cleaning solution tank (574) and the valve assembly inlet port and pressurizes cleaning fluid for both the spray bar (526) and the remote distributor (614).

Claims

1. A carpet extractor comprising:

an extractor housing;

a vacuum source mounted on the extractor housing;

a reservoir mounted on the extractor housing for storing and providing a supply of cleaning solution;

a distributor mounted on the extractor housing and communicating with said reservoir for selectively applying the cleaning solution to a floor surface to be cleaned;

a cleaning accessory tool including a cleaning solution supply hose selectively communicating with said reservoir for selectively applying the cleaning solution to a remote surface; and

,

a valve assembly mounted on the extractor housing, in fluid communication with the reservoir, the distributor and selectively in communication with the cleaning solution supply hose of the cleaning accessory tool for selectively delivering cleaning solution to at least one of the distributor and the accessory tool.

2. The carpet extractor of claim 1, wherein the valve assembly comprises:

a valve housing including a chamber;

an inlet port defined on a wall of the chamber, said inlet port being in fluid communication with the reservoir;

a first discharge port defined on a wall of the chamber, said first discharge port being spaced from said inlet port and being in fluid communication with the distributor; and

,

a second discharge port defined on a wall of the chamber, said second discharge port being spaced from said inlet port and said first discharge port and being in fluid communication with the cleaning solution supply hose;

a first discharge valve, located in said valve housing, which selectively seals the first discharge port to control a delivery of cleaning solution to the distributor; and

,

a second discharge valve, located in said valve housing, which selectively seals the second discharge port to control a delivery of cleaning solution to the cleaning solution supply hose.

3. The carpet extractor of claim 2, wherein the first discharge valve includes:

a first valve seat;

a first poppet which selectively engages the first valve seat to seal the first discharge port; and

, the second discharge valve includes;

a second valve seat;

a second poppet which selectively engages the second valve seat to seal the second discharge port.

4. The carpet extractor of claim 3, wherein the valve assembly further includes a compression spring which biases the first poppet to a sealing position in which the first poppet engages the first valve seat and which biases the second poppet to a sealing position in which the second poppet engages the second valve seat.

5. The carpet extractor of claim 3, further including an actuator which selectively engages the first poppet for translating the first poppet between the sealing position and an open position, in which a fluid flow path is defined between the inlet port and the first discharge port.

6. The extractor of claim 5, wherein the actuator comprises a rod and the extractor further including a trigger which selectively applies a force to the rod to move the rod into the engaged position.

7. The extractor of claim 6, wherein the rod includes a biasing spring which biases the trigger to the disengaged position.

8. The carpet extractor of claim 3, further including a coupling assembly in fluid communication with the cleaning solution supply hose wherein the coupling assembly selectively couples and uncouples the cleaning solution supply hose and the second discharge port, the coupling assembly being configured to open the second discharge valve when the cleaning solution supply hose and the second discharge port are coupled.

9. The carpet extractor of claim 8, wherein the second poppet includes a valve stem slidingly received in a valve stem passage in fluid communication with the second discharge port, the valve stem defining an interior bore in fluid communication with the second discharge port and an aperture, the valve stem selectively sealing the second discharge port in a first position and providing fluid communication between the chamber and the discharge port in a second position.

10. The carpet extractor of claim 1, further including a solution supply pump for selectively supplying cleaning solution under pressure to the accessory tool, wherein the solution supply pump is fluidly connected between the cleaning solution supply hose and the valve assembly.

11. The carpet extractor of claim 10, further comprising a recovery tank mounted on the extractor housing wherein the recovery tank defines an inlet slot and the solution supply pump is enclosed in a pump housing which is configured for selectively mounting and dismounting over the inlet slot, the pump housing defining an inlet tube, the inlet slot being configured to receive a first end of the inlet tube, a second end of the inlet tube being in fluid communication with an opening in the pump housing which selectively receives a cleaning accessory tool suction hose.

12. The carpet extractor of claim 11, wherein the inlet tube includes a wall which closes a fluid flow path between a suction nozzle inlet slot and the recovery tank when the pump housing is mounted over the recovery tank.

13. The extractor of claim 1, further including a solution supply pump for selectively supplying cleaning solution under pressure to one of the accessory tool and the distributor, wherein the solution supply pump is fluidly connected between the reservoir and the valve assembly.

14. The carpet extractor of claim 13, wherein the extractor includes wheels mounted on the extractor housing for moving the extractor housing over the floor surface to be cleaned.

15. The carpet extractor of claim 1, wherein the reservoir includes a fluid release valve which includes a grommet for sealing the fluid release valve to a wall of the reservoir and selectively sealing around a reservoir valve actuator when the reservoir is fluidly connected with the valve assembly.

16. A carpet extractor, comprising:

an extractor housing;

a vacuum source mounted on the extractor housing;

a cleaning fluid reservoir mounted, on the extractor housing for holding a cleaning fluid;

a distribution bar mounted on the extractor housing for distributing the cleaning fluid to a floor surface to be cleaned;

a first fluid line located on the extractor housing communicating the distribution bar with the reservoir;

a valve assembly mounted on the extractor housing communicating with the first fluid line for controlling the delivery of cleaning fluid to the distribution bar;

a cleaning accessory tool which is selectively connected to the valve assembly for applying cleaning fluid to an above-floor surface;

a second fluid line, connected to the cleaning accessory tool for communicating with the valve assembly, wherein the valve assembly controls the delivery of cleaning fluid to the cleaning accessory tool; and

,

a pump for pressurizing the cleaning fluid being delivered to the cleaning accessory tool, the pump communicating with at least one of the first fluid line and the second fluid line, said pump being mounted on one of the extractor housing and the cleaning accessory tool.

17. The carpet extractor of claim 16, wherein the valve assembly comprises:

a valve housing including a chamber;

an inlet port defined on a wall of the chamber;

a first discharge port defined on a wall of the chamber and spaced from the inlet port;

a second discharge port defined on a wall of the chamber and spaced from the inlet port and the first discharge port;

a first poppet valve located in the chamber for selectively closing the first discharge port; and

,

a second poppet valve located in the chamber for selectively closing the second discharge port.

18. The carpet extractor of claim 17, further comprising a biasing member for urging the first and second poppet valves into a closed position.

19. The carpet extractor of claim 18, further including an opening element for urging the first poppet valve from a closed position to an open position.

20. The carpet extractor of claim 19, wherein the opening element includes an actuation rod.

21. The carpet extractor of claim 17, further including a quick connect coupling which is selectively coupled between the second fluid line and the valve assembly, and wherein the second poppet valve is translated between the closed position and an open position when the quick connect coupling is coupled.

22. A floor cleaner comprising:

a base housing;

a vacuum source mounted on the extractor housing;

a valve assembly for selectively delivering a fluid through at least a selected one of first and second discharge ports, the valve assembly including;

a first discharge valve which selectively seals the first discharge port in a first position and opens the first discharge port in a second position to deliver the fluid from the first discharge port, and

a second discharge valve which selectively seals the second discharge port in a first position and opens the second discharge port in a second position to deliver the fluid from the second discharge port; and

,

a first distributor mounted on the base housing for applying the fluid to a floor surface, the first distributor being in fluid communication with the first discharge port; and

,

an attachment tool, selectively connectable to the valve assembly, the attachment tool including a second distributor for applying the fluid to a remote surface, the second distributor being in fluid communication with the second discharge port when the tool is connected to the valve assembly.

23. The floor cleaner of claim 22, wherein the valve assembly further comprises a compression spring which biases the first discharge valve to the first discharge valve first position and the second discharge valve to the second discharge valve first position.