Apparatus for pulsewise dispensation of very small amounts of li

Details Apparatus for pulsewise dispensation of very small amounts of li Apparatus for pulsewise dispensation of very small amounts of li

1978-12-21

1980-11-11

Skaggs, H. Grant

Dispensing

Automatic control

Delivery from source controlled by quantity in discharging...

222 64, 222334, 137212, 222394, 417138, B67D 508

Patent

active

042328020

ABSTRACT:
In an apparatus for the pulsewise dispensing of very small amounts of liquid controlled with a measuring instrument comprising an ejecting device for the pulsewise ejection of a desired amount of liquid, a pump is provided for supplying liquid to the vessel from a reservoir. The pump includes a neck portion having an inlet at the bottom thereof and a foot portion, with at least the foot portion immersed in a liquid contained in the reservoir. The foot portion has a volume at least as great as the refill volume of the measuring vessel and a feedline to the measuring vessel is disposed within the neck portion and terminates in proximity to the bottom of the foot portion. A check valve opens and closes the foot portion inlet by means of compressed gas which is controllable by sensing devices at the measuring vessel.

REFERENCES:
patent: 2360038 (1944-10-01), Burton
patent: 3224638 (1965-12-01), Harrell
patent: 3609379 (1971-09-01), Hildebrandt

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