Liquid dispensing system with controllably movable cartridge
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United States of America Patent
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-
Jul 4, 2000
Grant Date -
N/A
app pub date -
Aug 24, 1995
filing date -
Aug 24, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
A liquid dispenser has a pump assembly with a housing and a cartridge that is movable relative to the housing between an upper non-dispensing position and a lower dispensing position. The movement is controlled by the selective introduction of air to create a column of air. The dispenser is otherwise biased downward. The movement of the dispenser can be used to avoid repeated upward and downward movement of a pump assembly. In a pump assembly with multiple dispensers, all but one can be raised while only the dispensing cartridge is lowered.
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