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Electronic filter status sensor

  • US 5,871,651 A
  • Filed: 04/02/1997
  • Issued: 02/16/1999
  • Est. Priority Date: 04/02/1997
  • Status: Expired due to Term
First Claim
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1. A fuel dispenser having filter status sensing comprising:

  • a fuel delivery path adapted for delivering fuel from a storage tank to a vehicle;

    a fuel filter in said delivery path for filtering fuel flowing in said delivery path;

    a flow monitor in the delivery path for measuring fuel flow in said delivery path; and

    a controller associated with said flow monitor adapted to determine and compare a first flow rate determined during a first cycle with a second flow rate determined during a subsequent cycle and provide a filter status signal when said first and second flow rates differ by more than a predetermined amount indicative of an unclean filter.

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