Device for dispensing a dosed amount of free-flowing material, in particular liquid medication from a container
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United States of America Patent
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-
Aug 6, 1991
Grant Date -
N/A
app pub date -
Sep 25, 1989
filing date -
Feb 5, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved container closure and dosing pump or syringe has a piston formed with a truncated cone-shaped face. A spring-biased operator yieldably holds the piston sealed deeply in a dosing chamber from which it can be shifted to project essentially by the height of the truncated piston face to completely scavenge the chamber. The device is formed of only three injection molded plastic parts and a return spring, to effect inexpensive production.
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