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METHOD AND DEVICE FOR INDICATING FUTURE NEED FOR PRODUCT REPLACEMENT OF RANDOM-USE DISPENSING

  • US 20090204256A1
  • Filed: 04/17/2009
  • Published: 08/13/2009
  • Est. Priority Date: 11/14/2007
  • Status: Active Grant
First Claim
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1. A method for indicating when to replace material in a dispenser:

  • setting an activation count to a number representative of the amount of dispenses remaining;

    setting a service interval for the dispenser over a number of units of time;

    decrementing said activation count upon each activation of the dispenser;

    calculating a running average of material usage representative of one unit of time;

    comparing said activation count with the product of said running average and said service interval; and

    indicating the dispenser requires refilling when said product is greater than said activation count.

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