Fluid dispensing unit having a circulation system and a method for circulating a fluid in a fluid dispensing unit

• US 9,038,856 B2
• Filed: 11/09/2009
• Issued: 05/26/2015
• Est. Priority Date: 11/09/2009
• Status: Active Grant

• Current Assignee: Dover Fueling Solutions UK Ltd. (Dover Corporation)
• Original Assignee: Wayne Fueling Systems LLC (Dover Corporation)
• Inventors: Larsson, Bengt I.
• Primary Examiner(s): Buechner, Patrick M
• Application Number:
  US13/508,364
• Publication Number:
  US 20120305089A1
• Time in Patent Office: 2,024 Days
• Field of Search: 222/54, 222/74, 222/146.5, 222/318, 222/424
• US Class Current: 222/74
• CPC Class Codes: B67D 7/02 for transferring liquids other than fuel or lubricants
• CPC Class Codes: B67D 7/04 for transferring fuels, lubricants or mixed fuels and lubricants
• CPC Class Codes: B67D 7/3209 relating to spillage or leakage, e.g. spill containments, leak detection leak detectors for underground fuel dispensing systems G01M3/2892
• CPC Class Codes: B67D 7/42 Filling nozzles
• CPC Class Codes: B67D 7/428 for delivering at least two different liquids into separate containers
• CPC Class Codes: B67D 7/62 power operated
• CPC Class Codes: B67D 7/80 Arrangements of heating or cooling devices for liquids to be transferred
• CPC Class Codes: B67D 7/82 Heating only
• CPC Class Codes: F16L 53/38 using elongate electric heating elements, e.g. wires or ribbons
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y10T 137/0318 Processes
• CPC Class Codes: Y10T 137/8593 Systems

Abstract

A dispensing unit is provided having a circulation system for circulating a fluid in the dispensing unit. The circulation system includes a circulation circuit and a mechanism for circulating the fluid in the circulation circuit. By circulating the fluid, the fluid is counteracted from crystallizing. A method for circulating a fluid in a dispensing unit is also provided.

Claims

1. A dispensing unit having a circulation system circulating a fluid in the dispensing unit, the circulation system comprising:

a circulation circuit comprising a hose having a coaxially installed fluid channel, and a gauge block configured to control the fluid when the fluid is circulating through the hose and the fluid channel; and

a mechanism configured to circulate the fluid in the circulation circuit, such that the fluid is counteracted from crystallizing.

2. The dispensing unit according to claim 1, wherein the circulation system further comprises a heating element configured to heat the fluid.

3. The dispensing unit according to claim 1, wherein the circulation system further comprises a valve configured to control the fluid when the fluid is circulating through the hose and the fluid channel.

4. The dispensing unit according to claim 1, wherein the circulation circuit comprises a hose, a nozzle, and a nozzle boot.

5. The dispensing unit according to claim 4, wherein the nozzle is configured to attain a leak proof connection for fluid communication with the nozzle boot when inserted in the nozzle boot.

6. The dispensing unit according to claim 4, wherein the circulation circuit further comprises a tube connected to the nozzle boot.

7. The dispensing unit according to claim 1, wherein the circulation system further comprises a reservoir configured to hold the fluid, wherein the reservoir is connected to the circulation circuit.

8. The dispensing unit according to claim 1, wherein the circulation system further comprises a temperature sensor connected to a control unit configured to control the mechanism configured to circulate the fluid.

9. The dispensing unit according to claim 2, further comprising a control unit configured to control:

the mechanism configured to circulate the fluid; and

the heating element.

10. The dispensing unit according to claim 1, wherein the circulation system further comprises a measurement device configured to measure the amount of circulated fluid.

11. The dispensing unit according to claim 1, wherein the fluid is aqueous urea solution.

12. A method for circulating a fluid in a dispensing unit having a circulation system, the method comprising circulating the fluid in a circulation circuit of the circulation system with a pump such that the fluid is counteracted from crystallizing, wherein the circulation circuit comprises a hose having a coaxially installed fluid channel, and a gauge block configured to control the fluid when the fluid is circulated through the hose and the fluid channel.

13. The method according to claim 12, further comprising heating the fluid with a heating element in the circulation system.

14. A dispensing unit having a circulation system for circulating a fluid in the dispensing unit, the circulation system comprising:

a circulation circuit comprising a hose, a nozzle, and a nozzle boot, wherein the nozzle is configured to attain a leak proof connection for fluid communication with the nozzle boot when inserted in the nozzle boot; and

a mechanism configured to circulate the fluid in the circulation circuit, such that the fluid is counteracted from crystallizing.

15. The dispensing unit according to claim 14, wherein the circulation system further comprises a heating element configured to heat the fluid.

16. The dispensing unit according to claim 14, wherein the circulation circuit comprises a hose having a coaxially installed fluid channel.

17. The dispensing unit according to claim 14, wherein the circulation system further comprises a valve configured to control the fluid when the fluid is circulating through the hose and the fluid channel.

18. The dispensing unit according to claim 14, wherein the circulation circuit further comprises a tube connected to the nozzle boot.

19. The dispensing unit according to claim 14, wherein the circulation system further comprises a reservoir configured to hold the fluid, wherein the reservoir is connected to the circulation circuit.

20. The dispensing unit according to claim 14, wherein the circulation system further comprises a temperature sensor connected to a control unit configured to control the mechanism configured to circulate the fluid.

21. The dispensing unit according to claim 14, further comprising a control unit configured to control:

the mechanism configured to circulate the fluid; and

the heating element.

22. The dispensing unit according to claim 14, wherein the circulation system further comprises a measurement device configured to measure the amount of circulated fluid.

23. The dispensing unit according to claim 14, wherein the fluid is aqueous urea solution.

24. A method for circulating a fluid in a dispensing unit having a circulation system, the method comprising:

circulating the fluid in a circulation circuit of the circulation system with a pump such that the fluid is counteracted from crystallizing, wherein the circulation circuit comprises a hose, a nozzle, and a nozzle boot, and wherein the nozzle is configured to attain a leak proof connection for fluid communication with the nozzle boot when inserted in the nozzle boot.

25. The method according to claim 24, further comprising heating the fluid with a heating element in the circulation system.