Patent ID: 8109285

Claim:
A roll-over vent valve, comprising: a housing formed with a fluid inlet and a fluid outlet, a valve seating bounding an outlet aperture of the housing, a float member comprising a sealing member, the float member received within the housing and axially displaceable between a sealed position wherein the sealing member sealingly bears against the valve seating of the outlet aperture to seal the fluid outlet, and an open position wherein the sealing member is disengaged from the valve seating whereby the fluid outlet is in flow communication with the fluid inlet; a pressure-retention device extending intermediate the valve seating and the fluid outlet, to thereby shut fluid flow therebetween as long as pressure differential between the fluid inlet and the fluid outlet does not exceed a minimal pressure threshold; and a one-way fluid inlet valve being in flow communication with said fluid outlet to allow fluid flow towards the fluid inlet at a substantially high flow rate in the event of under-pressure at the fluid inlet, the one-way fluid inlet valve comprising a cage having an inlet port provided through a wall portion of the housing and being in flow communication with the fluid outlet of the roll-over vent valve, and an outlet port provided through a cage closure fixed to the housing and being in flow communication with the fluid inlet of the roll-over vent valve, wherein the cage closure and the wall portion define therebetween a gap in which a sealing member is freely retained thereby being displaceable and deformable within the gap between sealing engagement of the inlet port and disengagement therefrom.