| 摘要 |
<p>This invention provides an improved liquid measuring and dispensing closure device having axial symmetry and including a tubular body with an internal lock chamber which communicates with the interior of the bottle by way of a narrow coaxial vent tube, the lock chamber also communicating by way of an annular aperture with a first annular coaxial passage which connects the interior of the bottle with a pouring opening. During pouring liquid flows into the lock chamber through a second annular coaxial passage, narrower than the first, and also through the pouring opening until the liquid in the lock chamber closes off the vent tube, direct flow of air into the bottle through the first passage being prevented, and the axial symmetry of the stopper permitting its effective use in any orientation of the bottle.</p> |
