| 摘要 |
<p>A no-spill cup (22) and valve assembly (31) which provides a secure seal against accidental liquid flow from the cup spout. The act of sucking at the cup spout creates negative pressure or a partial vacuum against a valve (31) near the spout, causing the valve to invert which unblocks an opening in the valve. When the opening is unblocked, liquid can flow freely through the valve (31) and spout. When not in the use, the valve (31) sits in a resting, closed position, with the valve pressed against a center seal-off, sealing off the opening in the valve assembly. The cup (22) assembly further allows liquid flow to be regulated between regular or maximum flow and minimal flow levels or rates by rotating the position of the valve assembly in the cover of the cup.</p> |
