Electronic filter status sensor
US5871651A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Apr 2, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D7/76
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A fuel dispenser having a filter status sensor includes a fuel delivery path for delivering fuel from a station storage tank to a vehicle; a fuel filter in the delivery path for filtering fuel flowing in the delivery path; a flow monitor in the delivery path for measuring fuel flow in the delivery path; and a controller associated with the flow monitor adapted to determine and compare a first flow rate taken during a first cycle with a second flow rate taken during a second cycle. The controller provides a filter status signal when the first and second flow rates differ by more than a predetermined difference indicative of an unclean fuel filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.