Automated liquid dispenser control

Details Automated liquid dispenser control Automated liquid dispenser control

1981-08-31

1984-10-09

Rolla, Joseph J.

Dispensing

Cutoff operated by selectively preset volume or rate of...

7386416, 222 41, 222 63, 604152, 604155, B67D 530

Patent

active

044756666

ABSTRACT:
A servo controlled actuator for an automated liquid dispenser for dispensing reagents or diluting samples with reagent automatically in accord with a programmed local microprocessor or remote computer control. The dispenser has at least one reciprocable syringe, valving for it and a syringe actuator driven by a hybrid servo control. The actuator includes a bi-directional variable speed motor and an encoder developing a pulse train which in number is representative of the position of the syringe piston and in repetition rate is representative of piston velocity. A microprocessor controls the piston stroke from the pulse train by comparison to a memory-stored count and controls piston velocity in predetermined relation to the terminal end of piston travel.

REFERENCES:
patent: 3173575 (1965-03-01), Gugerli et al.
patent: 3701345 (1972-10-01), Heilman et al.
patent: 3751642 (1973-08-01), Todd et al.
patent: 3756456 (1973-09-01), Georgi
patent: 4346742 (1982-08-01), Chase et al.
patent: 4387374 (1983-06-01), Weiner

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