Digital proportional metering pumping system

Details Digital proportional metering pumping system Digital proportional metering pumping system

1980-02-28

1982-07-27

Rolla, Joseph J.

Dispensing

Automatic control

Motor control

222135, 222145, B67D 508

Patent

active

043413277

ABSTRACT:
A precision controlled variable speed pumping system for controlling the operation of one or more independently driven pump motors includes one or more valveless rotary pumps each having a reciprocating piston directly driven by an individual stepping motor and a digital control circuit for individually directing the operation of each stepping motor whereby the resultant sum output of the pumps may be utilized for mixing, blending or proportioning fluid flow.

REFERENCES:
patent: 3887110 (1975-06-01), Porter
patent: 3908862 (1975-09-01), Chandra et al.
patent: 3935971 (1976-02-01), Papoff et al.

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