Continuous washing system

• US 5,993,739 A
• Filed: 10/29/1997
• Issued: 11/30/1999
• Est. Priority Date: 10/29/1997
• Status: Expired due to Fees

• Current Assignee: Chaircare
• Original Assignee: Chaircare
• Inventors: Lyon, Larry R.
• Primary Examiner(s): Warden, Sr., Robert J.
• Assistant Examiner(s): Moazzam, Fariborz
• Application Number:
  US08/960,156
• Time in Patent Office: 762 Days
• Field of Search: 422/3, 422/28, 422/31, 422/105-111, 422/292, 422/297, 422/300, 422/304, 134/72, 134/123, 134/111, 134/108, 134/99.2, 134/18, 134/26, 134/29, 134/32, 134/34, 134/42, 134/15, 134/36, 134/37, 134/30, 15/63
• US Class Current: 422/31
• CPC Class Codes: B08B 3/022 Cleaning travelling work B08B3/042 takes precedence
• CPC Class Codes: B60S 3/04 for exteriors of land vehicles B60S3/002, B60S3/004 take precedence; specially adapted for railway vehicles B60S3/006

Abstract

The present invention provides a low-cost and practical method for cleaning objects such as wheelchairs on a continuous basis. In one embodiment, the apparatus of the present invention is a mobile, self-contained system in which objects are cleaned and sanitized as they travel in a U-shaped path within a wash chamber. As the objects enter the first side of the wash chamber, suitably located water jets spray the objects with a mixture of detergent and water to remove associated foreign materials until shortly after the objects make a U-turn. At this point, the objects are first sprayed with a mixture containing a rinse agent and water, then with a spray containing disinfectant and water. The objects are thereafter dried by suitable drying means such as a high velocity air curtain system. The continuous washing system of the present invention preferably has a self-contained water heater to pre-heat the water prior to its being sprayed onto the objects. The system preferably also has a recycling path wherein water which has been sprayed onto the objects is collected and filtered in a water reservoir prior to being used again in the system.

Claims

1. A process for cleaning an object with a continuous wash system comprising the steps of:

providing an apparatus for cleaning the object, the apparatus having a wash chamber with a floor and an opening;

moving the object through the wash chamber, wherein the object travels in a relatively horizontal curved path, further wherein the object enters and exits the wash chamber through said opening;

spraying water from a water source onto the object, wherein foreign materials are removed from the object; and

draining water through one or more outlets in the floor while the object is in the wash chamber.

2. The process as recited in claim 1 wherein the relatively horizontal curved path is selected from the group consisting of a generally U-shaped path, a C-shaped path, and a J-shaped path.

3. The process as recited in claim 1 further wherein the continuous wash system is portable.

4. The process as recited in claim 1 wherein the water is sprayed with spraying means connected to the water source, further wherein at least some of the water from the water source is heated with a water heater connected to the spraying means.

5. The process as recited in claim 4 wherein a portion of the water is mixed with one or more cleaning agents.

6. The process as recited in claim 5 further wherein the object is sanitized with a disinfectant.

7. The process as recited in claim 6 further wherein the object is dried with drying means located proximate to the wash chamber.

8. The process as recited in claim 7 wherein the drying means comprises one or more plenum chambers and at least one blower which creates an air curtain proximate to the opening of the wash chamber.

9. The process as recited in claim 4 wherein a substantial amount of the foreign materials contained in the water is removed with at least one filter prior to using the water again in the wash system.

10. The process as recited in claim 9 wherein the at least one filter is located in the water reservoir.

11. The process as recited in claim 9 wherein the guiding means includes a closed loop drive chain onto which the object is connected using a wash arm.

12. The process as recited in claim 1 wherein guiding means cause the object to travel through the wash chamber in the relatively horizontal curved path.

13. The process as recited in claim 1 further comprising a water reservoir for holding water obtained from the water source which has not been sprayed and water which has been sprayed onto the object and has drained through the one or more outlets in the floor.

14. The process as recited in claim 13 wherein the floor is sloped towards one end of the wash chamber and the sprayed water drains by running down the sloped floor and into the water reservoir, further wherein the water reservoir is recessed beneath the floor.

15. The process as recited in claim 1 wherein the object has wheels and is selected from the group consisting of wheel chairs, shopping carts, food service carts, bakery racks, luggage carts, golf carts, bicycles and strollers.

16. A process for cleaning an object with a multi-component wash system comprising the steps of:

providing an apparatus for cleaning the object, the apparatus having a wash chamber with a floor and an opening, the apparatus further having a source of mechanical energy proximate to the wash chamber for drawing water from a water source into an intake line and releasing the water through water jets located inside the wash chamber;

guiding the object with guiding means along a relatively horizontal curved path inside the wash chamber, wherein the object enters and exits the wash chamber through said opening;

draining water through one or more outlets in the floor while the object is in the wash chamber;

placing an electronic sensing device in a location within the wash system for sensing at least one measurable process variable;

receiving an input signal from the electronic sensing device in a machine, the input signal being representative of the measurable process variable; and

opening a flow path within the wash system when the input signal is received by the machine.

17. An apparatus for cleaning an object comprising:

a wash chamber with a floor and an opening, the wash chamber connected to a water source and a power supply

a source of mechanical energy connected to the power supply for using water which has been drawn from the water source;

at least one sprayer connected to the source of mechanical energy for spraying water onto the object as it travels through the wash chamber;

one or more outlets in the floor for draining water while the object is in the wash chamber; and

a relatively horizontal curved path inside the wash chamber along which the object travels, wherein the object enters and exits the wash chamber through said opening.

18. The apparatus as recited in claim 17 wherein the object has wheels and is selected from the group consisting of wheel chairs, shopping carts, food service carts, bakery racks, luggage carts, golf carts, bicycles and strollers.

19. The apparatus of claim 17 and further comprising:

a water reservoir for holding water from the water source and from the at least one sprayer, the water reservoir located proximate to the wash chamber;

a recirculator for recirculating water which has been sprayed on the object for further use in the wash system; and

at least one filter located in the water reservoir to filter out a substantial amount of the foreign materials contained in the water which has been sprayed on the object, prior to using the water again in the wash system.

20. The apparatus of claim 19 wherein the relatively horizontal curved path is selected from the group consisting of a generally U-shaped path, a C-shaped path, and a J-shaped path.

21. The apparatus of claim 19 further wherein the wash system is portable.

22. The apparatus of claim 19 wherein at least some of the water is heated with a water heater connected to the at least one sprayer.

23. The apparatus of claim 19 further comprising:

one or more cleaning agents mixed with a portion of the water for cleaning the object; and

a disinfectant mixed with a portion of the water for disinfecting the object after it has been rinsed, wherein the object is sanitized.

24. The apparatus of claim 19 wherein guiding means cause the object to travel through the wash chamber in a curved path.

25. The apparatus as recited in claim 24 wherein the guiding means includes a closed loop drive chain onto which the object is connected using a wash arm.

26. The apparatus of claim 19 further comprising drying means located proximate to the wash chamber for drying the object which has been sanitized.

27. The apparatus of claim 26 wherein the drying means comprises one or more plenum chambers and at least one blower which creates an air curtain proximate to the opening of the wash chamber.

28. The apparatus as recited in claim 19 wherein the floor is sloped towards one end of the wash chamber and the sprayed water drains by running down the sloped floor and into the water reservoir, further wherein the water reservoir is recessed beneath the floor.