Patent ID: 7997293

Claim:
A container including a rollover valve comprising a container body providing an enclosed volume open at a neck; a cap releasably attached to the neck and providing: an outer member; a sealing member; and filtration media disposed between the outer member and the sealing member; wherein the filtration media is configured to resiliently support the sealing member for resilient movement relative to a fluid flow opening between an open position in which the sealing member is spaced apart from the fluid flow opening to thereby permit the ingress of vapors into or egress of vapor out of the fluid flow opening and a closed position in which the sealing member is in sealing engagement with the fluid flow opening to thereby substantially block the fluid flow opening and inhibit the ingress of fluid into or egress of fluid out of the fluid flow opening; wherein the filtration media is configured such that the sealing member is normally in the open position and remains in the open position until a sufficient differential pressure is reached across the filtration media, the sealing member thereafter moving to the closed position and at least one of the filtration media and the outer member is configured for resiliently biasing the sealing member towards the open position, and wherein the sealing member remains in the open position until a sufficient differential pressure is reached across the filtration media for overcoming the biasing force applied by the at least one of the filtration media and the outer member; wherein the filtration media is configured to allow vapors to pass therethrough in a first direction out of the container body and restrict liquid flow therethrough in the first direction out of the container body and wherein the filtration media is caused to move from a first position in which the sealing member in the open position spaced apart from the container opening to a second position in which the sealing member in the closed position in sealing engagement against the container opening when the container is not upright such that liquid produces a first closing force in the first direction on the filtration media and a second closing force in the first direction on the sealing member and the combined first and second closing forces applies sufficient pressure to the filtration media and the sealing member to move the sealing member to the closed position prior to liquid passing through the filtration media, wherein the filtration media further comprises a non-wetting membrane.