Disposable plastic liquid pump

Details Disposable plastic liquid pump Disposable plastic liquid pump

1995-10-10

1997-10-14

Kaufman, Joseph

Dispensing

With cutter and/or punch

To form dispensing opening in container

2221811, 2223219, 222325, 2225416, 417545, 417547, 417550, B67D 500

Patent

active

056762771

ABSTRACT:
A disposable plastic pump for dispensing liquids is disclosed which comprises two basic unitary, preferably all plastic, elements: a chamber forming body having an open outer end and an inner end in fluid communication with a liquid reservoir, and a piston formed to slidably fit into the chamber. The chamber forms two axially adjacent coaxial chambers, an inner chamber of one diameter and an outer chamber of a different diameter. The piston comprises a stem on which is located two spaced flexing disc each sized to fit in and serving as a one-way valve in the inner chamber and outer chamber, respectively, permitting fluids to flow outwardly past each flexing disc. A sealing disc is located on the stem outwardly of the outermost flexing disc. A passageway is provided from an inlet on the piston between the outermost flexing disc and the sealing disc through which the dispensed liquid flow.

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