Disposable plastic liquid pump

Details Disposable plastic liquid pump Disposable plastic liquid pump

1991-05-20

1992-11-24

Kashnikow, Andres

Dispensing

With casing or support

Bracket or suspension supported

222321, 222325, 222340, 417545, 417547, 417550, B67D 506

Patent

active

051655772

ABSTRACT:
A disposable plastic pump for dispensing liquids is disclosed which comprises three basic unitary all plastic elements: a chamber forming body having an open outer end and an inner end in fluid communication with a liquid reservoir, a one-way valve located at the inner end of the chamber between the reservoir and the chamber permitting fluid flow only from the reservoir into the chamber, and a piston formed to slidably fit into the chamber. The piston comprises a stem on which is located an inwardly located flexing element serving as a one-way valve to permit fluid flow outwardly past the flexing element and a sealing element located outwardly of the flexing element. A channel is provided from an inlet on the piston between the flexing element and the sealing element through which the dispensed liquid flows.

REFERENCES:
patent: 3124080 (1964-03-01), Sisson
patent: 3193159 (1965-07-01), Swindler
patent: 4118152 (1978-10-01), Bron
patent: 4360130 (1982-11-01), Nishimura et al.
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patent: 4548340 (1985-10-01), Messer
patent: 4589573 (1986-05-01), Tada
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patent: 4615476 (1986-11-01), Hobbs et al.
patent: 4621749 (1986-11-01), Kanfer
patent: 4651902 (1986-12-01), Hobbs et al.
patent: 4673109 (1987-06-01), Cassia
patent: 5051073 (1991-09-01), Newbold

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