SHUTOFF VALVE FOR USE IN FUEL DISPENSING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a valve, more specifically, an emergency shutoff valve used in a fuel dispensing system.

SOLUTION: The emergency shutoff valve 20 includes a fluid inlet 50, a fluid outlet 52 and a fluid flow passage 54 extending therebetween. The valve includes a valve element 62 disposed within a housing 30 and releasably latched in an open position by a latching mechanism 74. An expansible member 100 defines at least a portion of a sealed expansible chamber 108 sealed at locations downstream and upstream of a weakened portion 94 of the housing 80. The emergency shutoff valve 20 defines a failure mode wherein the structural integrity of the housing 30 is compromised to an extent wherein fuel can flow into the expansible chamber when a predetermined load is applied to a portion of the housing 30. The expansible member 100 is operable for uncoupling the latching mechanism 78 so that the valve element 62 moves from the open position to the closed position.

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