Patent ID: 7275665

Claim:
A vented closure for a container for liquid, comprising: a base collar engagable with the container and having an outlet aperture for dispensing of a liquid from the container and spaced therefrom a vent aperture of a size sufficiently small to cause external air passing through the vent aperture to form air bubbles, a primary fluid passageway extending from the outlet aperture and through the base collar to an interior of the container for conveying liquid to the outlet aperture, a secondary fluid passageway at least partly separate from the primary fluid passageway and extending from the vent aperture to the interior of the container for conveying the liquid from the container to the vent aperture and for conveying the air bubbles from the vent aperture and through the liquid in the secondary fluid passageway to the interior of the container to thereby vent the container to exterior air while dispensing liquid, and a baffle surface associated with the secondary fluid passageway for diverting air the bubbles to break up any smooth flow of the air the bubbles through the liquid in the secondary fluid passageway wherein the baffle surface includes a plurality of ribs which are spaced along and extend into the secondary fluid passageway so as to form a no-straight path for the air bubbles and the liquid in the secondary fluid passageway.