Leak resistant drinking cup
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United States of America Patent
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Aug 18, 2009
Grant Date -
Aug 3, 2006
app pub date -
Jan 28, 2005
filing date -
Jan 28, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A leak resistant drinking cup has a diaphragm seal for normally closing an open top of a liquid container of the cup. The seal can be opened to permit liquid to flow past it and out of the cup upon application of a vacuum pressure by the person, typically a small child, drinking from the cup. The diaphragm seal has a peripheral edge margin that can be deflected upward by the vacuum pressure to open a path out of the drinking cup. A hold down rib may be employed to control the locations where the peripheral edge margin is permitted to deflect.
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Family
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