Metering apparatus and method

Details Metering apparatus and method Metering apparatus and method

1974-11-20

1976-12-21

Swisher, S. Clement

Measuring and testing

Measuring vessel

222212, 222215, B01L 302, G01N 114

Patent

active

039981037

ABSTRACT:
An elastic tube, having an inlet end adapted to communicate with liquid to be metered incrementally and an outlet end connected to a discharge nozzle having an orifice, is arranged to be collapsed at inlet, outlet and intermediate positions (at least three positions) in a programmed cycle such that liquid is trapped in the intermediate position between collapsed inlet and outlet positions, thereby determining the size of the increment. Air is drawn in through the nozzle upon unloading the inlet position, thereby to suck in any liquid which may have accumulated at the nozzle and thus to prevent any inadvertent dropping off of liquid from the nozzle. The liquid is then discharged through the nozzle by collapsing the intermediate and outlet positions in succession, and liquid is drawn in through the inlet end upon unloading the inlet and intermediate positions, thereby starting the cycle over.

REFERENCES:
patent: 2351828 (1944-06-01), Marsh
patent: 3606596 (1971-09-01), Edwards
patent: 3681030 (1972-08-01), Natelson
patent: 3888125 (1975-06-01), Mochida

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