Metering apparatus for dispensing precise volumes of liquid

Details Metering apparatus for dispensing precise volumes of liquid Metering apparatus for dispensing precise volumes of liquid

1984-04-20

1985-08-06

Chambers, A. Michael

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Device including linearly-aligned power stream emitter and...

137565, 13762411, 222639, F15C 1118

Patent

active

045329621

ABSTRACT:
An apparatus is disclosed for dispensing a precise volume of liquid. An emitter dispenses a stream of liquid to an appropriate collector and includes an outlet restriction for generating a positive pressure in the emitter behind the outlet restriction. Liquid is fed to the emitter under pressure. A time delay loop is provided in communication with the emitter behind the outlet restriction for receiving liquid therefrom under the influence of the positive pressure. The exit end of the time delay loop directs liquid received thereby against the stream of liquid dispensed by the emitter and diverts the stream of liquid away from the collector when the time delay loop becomes filled with liquid under pressure from the emitter. A fluid amplifier is provided for generating a laminar liquid power stream to the emitter and for controlling the on-off cycle of the apparatus.

REFERENCES:
patent: Re29715 (1978-08-01), Richards
patent: 3533373 (1970-10-01), King
patent: 3703907 (1972-11-01), Richards
patent: 4148334 (1979-04-01), Richards
patent: 4211249 (1980-07-01), Richards
patent: 4298024 (1981-11-01), McLeod
patent: 4484601 (1984-11-01), Campau

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