Automatic low throughput metering apparatus for selecting and co

Details Automatic low throughput metering apparatus for selecting and co Automatic low throughput metering apparatus for selecting and co

1974-11-19

1977-01-04

Caldwell, John W.

Communications: electrical

Systems

Call station

128214E, 128DIG13, 1374875, 222 59, G08B 2100

Patent

active

040018016

ABSTRACT:
An automatic metering apparatus for selecting and controlling the flow rate of liquids, particularly for medical purposes, to be arranged between a liquid feeding container and a perfusion or transfusion line, comprises an electronic timer device capable of being pre-set from the outside in order to pre-select the flow rate of the liquid drops to be metered. A sequential electronic controlling circuit has its inputs connected to the outputs of the timer device, while its outputs control an actuator for causing liquid drops to inflow into the perfusion or transfusion line. An optic-electronic transducer is also provided for detecting the flow rate of the drops, the output of which is fed back to the input of the sequential circuit. The apparatus also comprises a counting device and at least one alarm device.

REFERENCES:
patent: 3197068 (1965-07-01), Corbin et al.
patent: 3623052 (1971-11-01), Spiller

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