Double shut-off refueling valve

Details Double shut-off refueling valve Double shut-off refueling valve

2011-02-08

2011-02-08

Cronin, Stephen K (Department: 3747)

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

C137S043000, C137S202000, C137S433000

Reexamination Certificate

active

07882823

ABSTRACT:
A double shut-off refueling valve responds to a full fuel tank level by closing the recirculation line and the canister line. The valve includes at least one float having one or more sealing surfaces corresponding with the recirculation line and the canister line, respectively. The sealing surface is on the top of a float in the float valve. When the fuel in the tank reaches a full level, the float moves upward to close the recirculation line and the canister line substantially simultaneously. In one embodiment, the valve is a float valve having a coaxial seal where the two valve openings corresponding to the recirculation line and the canister line are arranged concentrically. In other embodiments, the sealing surfaces can be, for example, a ribbon seal, two separate sealing surfaces, or any other seal configuration that corresponds with the orientation of the recirculation line and the canister line within the fuel system.

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