Stopper for a container such as a bottle and including slit valve structure, for use with a pump for altering and thereafter maintaining altered pressure in the container
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United States of America Patent
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-
Mar 12, 1991
Issued Date -
N/A
app pub date -
Jan 30, 1990
filing date -
Jan 20, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Stopper (1) with valve (6) for a bottle, which stopper (1) and valve (6) are integral and of the same elastic material, the valve being surrounded by a circular raised edge (5) and a circular flange (4) for cooperation with a pump (15) made from plastic material.
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