Dripless dispenser for liquids and viscous fluids
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United States of America Patent
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Jul 7, 1987
Grant Date -
N/A
app pub date -
Aug 2, 1985
filing date -
Aug 2, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dispenser for liquids and viscous fluids has a syringe-like device with a barrel for containing fluid and a nozzle at one end. The plunger is movable axially in the barrel for discharging the fluid. At the inner end of the plunger is a flexible, elastic cap which has an end wall that is normally concave, but which is flattened out under pressure when the fluid is discharged. When pressure on the cap is removed, the cap reassumes its concave shape thereby creating a suction in the barrel which draws fluid back into the nozzle to prevent dripping.
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