Termite control system with multi-fluid proportion metering and batch signal metering

• US 6,568,559 B2
• Filed: 12/06/2000
• Issued: 05/27/2003
• Est. Priority Date: 11/24/2000
• Status: Expired due to Fees

• Current Assignee: Wanner Engineering, Inc.
• Original Assignee: Wanner Engineering, Inc.
• Inventors: Lehrke, Kenneth Eugene, Miller, Michelle Jean, Losey, Scott Cameron
• Primary Examiner(s): Bomberg, Kenneth
• Application Number:
  US09/731,405
• Publication Number:
  US 20030071062A1
• Time in Patent Office: 902 Days
• Field of Search: 222/1, 222/57, 222/63
• US Class Current: 222/1
• CPC Class Codes: A01M 1/2044 Holders or dispensers for liquid insecticide, e.g. using wicks
• CPC Class Codes: A01M 2200/011 Crawling insects
• CPC Class Codes: B01F 2101/30 Mixing paints or paint ingredients, e.g. pigments, dyes, colours, lacquers or enamel
• CPC Class Codes: B01F 2101/305 Treatment of water, waste water or sewage
• CPC Class Codes: B01F 35/883 using flow rate controls for feeding the substances
• CPC Class Codes: G05D 11/133 with discontinuous action

Abstract

The invention provides a system and method for proportion metering multiple fluids together that are output from different pumps. The invention further provides a system and method for batch signal metering that provides feedback on the amount of fluid that has been dispensed. The invention has applications in numerous technologies, including metering together pest control fluids, such as those used for termite control; metering lawn care fluids such as herbicide and fertilizer; blending colors used in dyes, paints and the like; personal care products such as lotions; water treatment; and other technologies in which different fluids are pumped by separate pumps and thereafter mixed together downstream of the pumps prior to being dispensed.

Claims

1. A method of proportion metering first and second fluids that are output from first and second pumps, respectively, over a plurality of proportioning cycles to achieve a selected mix ratio, comprising:

a) simultaneously operating the first and second pumps;

b) monitoring the amounts of the first and second fluids output by the first and second pumps during each proportioning cycle, respectively; and

c) stopping the first pump while the second pump continues operating until the selected mix ratio is achieved for a current proportioning cycle, and then restarting the first pump to begin the next proportioning cycle.

2. The method according to claim 1, wherein the step of monitoring comprises counting electrical pulses that are output from sensors associated with the first and second pumps, each pulse representative of an amount of fluid output by the respective first and second pump.

3. The method according to claim 2, wherein any pulses generated by the first pump after it is stopped are counted in the next proportioning cycle.

4. The method according to claim 1, further including monitoring the time delay between stopping the first pump and achieving the selected mix ratio, and modifying the speed of the first pump in the next proportioning cycle to minimize the time delay.

5. The method according to claim 1, wherein the first and second fluids are different fluids.

6. The method according to claim 5, wherein the first fluid is termiticide fluid and the second fluid is water.

7. The method according to claim 1, further including monitoring the total amounts of the first and second fluids output from the first and second pumps, and generating a sensory signal each time that the first and second pumps output a selected combined amount of the first and second fluids.

8. The method according to claim 7, wherein generating a sensory signal comprises generating an audible signal.

9. A method of proportion metering first and second fluids output from first and second pumps to achieve a predetermined mix ratio, comprising:

pumping the first and second fluids in proportioning batches through operation of the first and second pumps, the ratio of the volumes of the first and second fluids in each proportioning batch equaling the predetermined mix ratio, and, wherein for each proportioning batch, operation of one of the first and second pumps is stopped.

10. A method of controlling first and second pumps that output first and second fluids, respectively, in order to blend the first and second fluids in a selected mix ratio, comprising:

simultaneously operating the first and second pumps over a plurality of proportioning cycles to output the first and second fluids;

monitoring the amounts of the first and second fluids output by the first and second pumps during each proportioning cycle;

stopping operation of the first pump in each proportioning cycle while the second pump continues to operate, operation of the first pump being stopped each time the first pump outputs a selected amount of the first fluid; and

restarting the first pump to begin the next proportioning cycle once the second pump has output enough of the second fluid in a current proportioning cycle to achieve the selected mix ratio.

11. The method according to claim 10, further including adding any fluid that is output by the first pump after it is stopped in each proportioning cycle to the next proportioning cycle.

12. A method of tracking the amount of fluid dispensed from a fluid dispensing system, comprising:

selecting an incremental amount of fluid that is less than a total amount of fluid to be dispensed;

electronically monitoring the amount of fluid being dispensed during dispensing, wherein monitoring occurs at a location remote from the location of dispensing the fluid; and

electronically generating a sensory signal each time that the amount of fluid dispensed equals the incremental amount of fluid, wherein generation of the sensory signal occurs at a location remote from the monitoring.

13. The method according to claim 12, wherein the fluid dispensing system includes first and second pumps that pump first and second fluids, respectively;

and wherein the incremental amount has a selected mix ratio between the first and second fluids.

14. The method according to claim 13, wherein electronically monitoring comprises electronically monitoring the revolutions of the first and second pumps.

15. The method according to claim 12, wherein the sensory signal comprises an audible signal.

16. A method of proportion metering first and second fluids output from first and second pumps to achieve a predetermined mix ratio in a fluid blend formed from the first and second fluids prior to dispensing a batch of the fluid blend, comprising:

pumping the first and second fluids in proportioning batches through operation of the first and second pumps, the ratio of the first and second fluids in each proportioning batch equaling the predetermined mix ratio, and the volume of the first and second fluids in each proportioning batch is small enough so that the dispensed batch comprises at least one of said proportioning batches.

17. The method of claim 16, wherein said dispensed batch comprises more than one of said proportioning batches.

18. A method of proportion metering first and second fluids output from first and second pumps to achieve a predetermined mix ratio in a fluid blend formed from the first and second fluids prior to dispensing a batch of the fluid blend, comprising:

pumping the first and second fluids in proportioning batches through operation of the first and second pumps, each proportioning batch comprising a proportioning batch volume that includes an amount of the first fluid and an amount of the second fluid, and wherein each proportioning batch volume is a fraction of the volume of the dispensed batch, whereby the dispensed batch comprises at least one said proportioning batch volume and the ratio of the first and second fluids in the dispensed batch equals the predetermined mix ratio.

19. The method of claim 18, wherein said dispensed batch comprises more than one of said proportioning batches.