Two-stage roll-over valve

Details Two-stage roll-over valve Two-stage roll-over valve

1986-12-24

1987-10-13

Hart, Charles

Gas separation

Means within gas stream for conducting concentrate to collector

55 88, 55182, 141286, 220 85VR, 220 86R, B01D 5302

Patent

active

046996389

ABSTRACT:
A system is provided for recovering fuel vapors discharged from a vehicle fuel system during refueling. The vehicle fuel system including a fuel tank having a filler neck and a separate outlet. The system includes a venting module mounted in the outlet and configured to divide the outlet into separate first and second fuel vapor flow ports. Pressurized fuel vapor in the fuel tank is exhaustable therefrom through at least one of the first and second ports. The venting module includes a first chamber inside the first tank and a second chamber outside the fuel tank. A vapor delivery system conducts fuel vapor from the first and second ports to a fuel vapor treatment site. A roll-over valve assembly in the first chamber selectively blocks the flow of fuel vapors through the first fuel vapor flow port during vehicle rollover or the like. A vapor recovery valve assembly in the second chamber selectively regulates the flow of fuel vapors through the second fuel vapor flow port so that fuel vapor in the fuel tank can be discharged through the fuel tank outlet and recovered at the fuel vapor treatment site during vehicle refueling.

REFERENCES:
patent: 3617034 (1971-11-01), Skinner
patent: 4261477 (1981-04-01), Casimir et al.

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