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

Claim 7:
8. 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:
dispensing, by the pump and responsive to actuation of the actuator, at least some of the material from the refill container according to a shot size value maintained by the controller;
updating, by the controller, the cumulative usage value based on the shot size value; and
generating, by the controller, a current quantity value based on a difference between an initial quantity value of the amount of the material in the refill container and the cumulative usage value after the cumulative usage value is updated.