Liquid dosing device

Details Liquid dosing device Liquid dosing device

1987-12-11

1989-03-14

Shaver, Kevin P.

Dispensing

Retarded or delayed action flow controllers or closures

222212, 222456, 222500, 222501, 222547, 222548, B65D 4700

Patent

active

048118710

ABSTRACT:
A dosing device for dispensing liquid from a container comprises an outlet passage for the liquid and an obturator, such as a flap or piston, that is adapted to be driven to block the outlet passage, once a quantity of liquid has been dispensed, under the influence of liquid flowing from the container through a small aperture into a space behind the obturator in a chamber in which the obturator is movable. The outlet passage has a convoluted configuration whereby flow of liquid through it is directed at least partly back towards the obturator to exert a back-pressure thereon, the obturator being of a dimension such that it may be acted on by liquid in part of the passage in which the flow is thus directed back. The chamber may have a moveable wall portion that opens up a large aperture to allow rapid restoration of the obturator to its start position.

REFERENCES:
patent: 1279014 (1918-09-01), Schimel
patent: 2331659 (1943-10-01), Cutone
patent: 2581897 (1952-01-01), Allen
patent: 2582026 (1952-01-01), Friedman
patent: 2919056 (1959-12-01), Collins
patent: 3146919 (1964-09-01), Chappell
patent: 3156386 (1964-11-01), Kuechenmeister
patent: 3321113 (1967-05-01), Conry
patent: 3558022 (1971-01-01), Zytko
patent: 3567079 (1971-03-01), Weigand
patent: 4728011 (1988-03-01), Schuster

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