Patent ID: 6026853
Filing Date: 2000-02-22
Classification: B60K,Y10T

Abstract:
A check valve for redundant sealing of a fuel tank from outflow of fuel from the tank while allowing inflow of fuel to the tank, said tank including a fuel filler pipe having a fuel input end and a tank connection end, said check valve comprising:an annular housing having an axis, said annular housing including a concentric annular valve seat portion including a valve seat facing in a direction toward said tank end of said fuel filler pipe;a hinge member axially spaced from said concentric annular valve seat, said hinge member engaging at least a portion of an inner surface of said annular housing; anda seal member attached to said hinge member, said seal member being resiliently biased toward engagement of said valve seat via a spring member, said seal member being responsive to a flow of fuel for allowing fuel to pass in a first direction, and for thereafter sealing of the passage of fuel in a second direction the configuration of said hinge member providing effectively low biasing for allowing fuel to pass said first direction during refilling of the fuel.