Granted Patent B2

US 8,087,303 · App. 12/549,778 · Granted Jan 3, 2012

Assignee: DEKA Products Limited Partnership

Abstract

Claims (29)

1. A flow sensor comprising:

a fluid chamber configured to receive a fluid micro-ingredient from a product container;

a diaphragm assembly configured to be displaced whenever the fluid within the fluid chamber is displaced;

a transducer assembly configured to monitor the displacement of the diaphragm assembly and generate a signal; and

a control logic subsystem in communication with a transducer assembly, the control logic subsystem configured to receive the signal from the transducer assembly and ascertain the quantity of fluid passing through the chamber,

wherein the control logic subsystem determines, based on the signal, whether the product container contains a volume of fluid micro-ingredient or whether the product container is empty.

2. The flow sensor of claim 1 wherein the transducer assembly comprising a linear variable differential transformer coupled to the diaphragm assembly by a linkage assembly.

3. The flow sensor of claim 1 wherein the transducer assembly comprising a needle/magnet cartridge assembly.

4. The flow sensor of claim 1 wherein the transducer assembly comprising a magnetic coil assembly.

5. The flow sensor of claim 1 wherein the transducer assembly comprising a Hall Effect sensor assembly.

6. The flow sensor of claim 1 wherein the transducer assembly comprising a piezoelectric buzzer element.

7. The flow sensor of claim 1 wherein the transducer assembly comprising a piezoelectric sheet element.

8. The flow sensor of claim 1 wherein the transducer assembly comprising an audio speaker assembly.

9. The flow sensor of claim 1 wherein the transducer assembly comprising an accelerometer assembly.

10. The flow sensor of claim 1 wherein the transducer assembly comprising a microphone assembly.

11. The flow sensor of claim 1 wherein the transducer assembly comprising an optical displacement assembly.

12. A method for determining a product container is empty comprising:

energizing a pump assembly;

pumping a micro-ingredient from a product container;

displacing a capacitive plate a displacement distance;

measuring the capacitance of a capacitor;

calculating the displacement distance from the measured capacitance; and

determining whether the product container is empty.

13. A method for determining a product container is empty comprising:

energizing a pump assembly;

displacing a diaphragm assembly a displacement distance by pumping a micro ingredient from a product container;

measuring the displacement distance using a transducer assembly;

using the transducer assembly generating a signal based, at least in part, upon the quantity of micro-ingredient pumped from the product container; and

determining, using the signal, whether the product container is empty.

Assignments (1)

Continuity (16)