Measuring device for dispensing predetermined quantities of a li

Details Measuring device for dispensing predetermined quantities of a li Measuring device for dispensing predetermined quantities of a li

1991-02-21

1993-02-16

Kashnikow, Andres

Dispensing

Resilient wall

Supply container delivering to receiving chamber

222365, 222453, 222454, 222476, G01F 1100

Patent

active

051863677

ABSTRACT:
A device for dispensing a predetermined quantity of the liquid contents of a container. The container has a neck defining a discharge opening for dispensing contents and a chamber in the neck having an inner end and an outer end adjacent the discharge opening. A piston assembly is mounted in the chamber moveable axially therein to dispense premeasured quantities of the liquid. The piston assembly includes a first piston having a predetermined small clearance with the chamber wall forming a meniscus seal with the chamber whereby the surface tension of the liquid prevents passage of liquid past the piston until the piston extends beyond the outer end of the chamber. A valve for sealing the inner end of the chamber is connected to the piston by a shaft and spaced at a fixed distance therefrom to define the predetermined volume of liquid when the valve seats on a valve seat at the inner end of the chamber.

REFERENCES:
patent: 674230 (1901-05-01), Winnemore
patent: 2408463 (1946-10-01), Wright
patent: 4582230 (1986-04-01), Vierkotter
patent: 4875603 (1989-10-01), Weinstein
patent: 4936490 (1990-06-01), Battegazzore
patent: 4971226 (1990-11-01), Donoghue
patent: 5092497 (1992-03-01), Toedter

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