Patent ID: 11971286
Assignee: GOJO INDUSTRIES, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC G  A  B | IPC A  B  G

Claim 12:
13. A method for indicating when to replace material in a dispenser, the dispenser comprising:
a refill container carrying an amount of material;
a controller that stores a cumulative usage value as a number representative of a number of dispense events remaining before the amount of material in the refill container is depleted to a point of replacement;
an actuator coupled to the controller; and
a pump coupled to the controller and to the refill container, the method comprising:
initiating, by the controller, a timer to update a total time value from an initial value when the refill container is coupled to the pump, the controller adding a shot size value to the cumulative usage value at each engagement of the actuator whereby the pump causes some of the material to be dispensed from the refill container,
calculating, by the controller, an average usage value by dividing the cumulative usage value by the total time value;
calculating, by the controller, a service interval value by dividing an initial quantity value of the amount of material in the refill container by the average usage value, and
displaying the service interval value on an indicator.