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

Claim 0:
1. 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 an activation count 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:
setting the activation count in the controller;
setting a service interval for the dispenser over a number of units of time;
decrementing the activation count in the controller upon each activation of the actuator for a dispense event whereby the pump causes some of the material to be dispensed from the refill container to establish a decremented activation count;
calculating a running average of material usage representative of an amount of material dispensed per unit of time of the number of units of time;
comparing the decremented activation count with a product of the running average and the service interval; and
indicating the material in the dispenser is to be replaced when the product is greater than the decremented activation count.