06968868 is referenced by 14 patents and cites 120 patents.

A method and apparatus for monitoring and determining fuel vapor recovery performance. The dispensing of liquid fuel into a tank by a gas pump nozzle displaces a mixture of air and fuel ullage vapor in the tank. These displaced vapors may be recovered at the dispensing point nozzle by a vapor recovery system. A properly functioning vapor recovery system recovers approximately one unit volume of vapor for every unit volume of dispensed liquid fuel. The ratio of recovered vapor to dispensed fuel is termed the A/L ratio, which should ideally be approximately equal to one (1). The A/L ratio, and thus the proper functioning of the vapor recovery system, may be determined by measuring liquid fuel flow and return vapor flow using a vapor flow sensor on a nozzle-by-nozzle basis. The determination of A/L ratios for individual nozzles are calculated using a reduced number of vapor flow sensors.

Title
Fueling system vapor recovery and containment performance monitor and method of operation thereof
Application Number
10/733480
Publication Number
6968868 (B2)
Application Date
December 11, 2003
Publication Date
November 29, 2005
Inventor
Richard K Lucas
Enfield
CT, US
Robert P Hart
East Hampton
CT, US
Agent
Withrow & Terranova PLLC
Assignee
Veeder Root Company
CT, US
IPC
B65B 031/00
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