Patent Number: 6,332,483

Title: Coaxial vapor flow indicator with pump speed control

Abstract: A method for monitoring vapor-to-liquid flow rate in a fuel dispensingsystem with a vacuum assisted vapor recovery system having a coaxial hosewith an outer fuel conduit for delivery of fuel and an inner vapor conduitfor recovery of vapor includes the steps of: determining vapor flow ratein the inner vapor conduit; issuing a signal indicative of the vapor flowrate; determining liquid fuel flow rate in the outer fuel conduit; issuinga signal indicative of the liquid fuel flow rate; comparing the signalindicative of the vapor flow rate and the signal indicative of the liquidfuel flow rate; and, when vapor-to-liquid flow rate is outside apredetermined range, issuing a signal. A vacuum assist vapor recoverysystem, and a fuel dispensing system equipped with such a vapor recoverysystem are also described.

Inventors: Healy; James W. (Hollis, NH)


International Classification: B67D 5/01 (20060101); B67D 5/04 (20060101); B67D 5/22 (20060101); B67D 005/00 ()

Expiration Date: 12/25/2014