Patent ID: 8376185
Filing Date: 2013-02-19
Classification: B67D,Y10T

Abstract:
1. A fuel dispenser comprising: a. a shear valve coupled to a riser pipe in fluid communication with an underground storage tank, the riser pipe comprising branch fuel piping; b. a primary flow meter in fluid communication with said shear valve and positioned down stream from said shear valve; c. a control system operatively coupled to said shear valve and said flow meter; and d. an auxiliary flow detection device in fluid communication with said riser pipe and positioned at an entrance of the dispenser such that the auxiliary flow detection device is disposed proximate to the shear valve, is positioned upstream from the primary flow meter, and is coupled to the branch fuel piping, wherein said control system is operatively coupled to said auxiliary flow detection device, configured to perform a comparison of a reading obtained from said primary flow meter to a reading obtained from said auxiliary flow detection device, and configured to produce a shutoff signal if a result of said comparison is larger than a predetermined value.