Shutoff valve for mechanically sealed ORVR system

Details Shutoff valve for mechanically sealed ORVR system Shutoff valve for mechanically sealed ORVR system

2007-10-30

2007-10-30

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Processes

Involving pressure control

C123S519000, C137S039000, C137S043000, C137S587000, C141S059000

Reexamination Certificate

active

11102342

ABSTRACT:
A vapor vent/tipping valve has a diaphragm with a bleed therethrough responsive to the differential pressure of bleed flow to control vapor venting to the canister and vapor recirculation to the filler tube. A dip tube causes rising fuel in the tank to close the dip tube and prevent vapor flow to the diaphragm bleed thereby starving the recirculation line and allowing nozzle discharge to create a vacuum in the filler and effect nozzle shutoff. Alternatively, float operated shutoff valves may be employed in the dip tube and vapor vent chamber inlet, the shutoff valves may include inertial members for closing the float valves to afford tipping/rollover protection.

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