Control system for controlling the supply of a predetermined qua

Details Control system for controlling the supply of a predetermined qua Control system for controlling the supply of a predetermined qua

1984-04-13

1987-01-20

Rolla, Joseph J.

Dispensing

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

Cutoff set after discharge begins

222 63, 364479, 377 21, B67D 508

Patent

active

046375252

ABSTRACT:
A control system for controlling a supply of a predetermined quantity of fluid comprises a pump for supplying a fluid, a motor for driving the pump, a measuring device for measuring a flow quantity of the fluid which is supplied by the pump, a device for presetting before starting a fluid supplying operation a preset value P which is indicative of a desired fluid supplying quantity, and a control device supplied with a measured flow quantity from the measuring device and the preset value P for controlling the application of a current to the motor. The control device comprises a first circuit for applying the current to the motor until the measured flow quantity from the measuring device becomes equal to P-K, where K is a predetermined value greater than an oversupply quantity .DELTA.Q of the fluid which is supplied by the pump after the current to the motor is cut off, and a second circuit for applying the current to the motor m times in terms of minute current applying durations until a total quantity Q of supplied fluid measured by the measuring device becomes approximately equal to the preset value P, where m is an integer, ##EQU1## and q'n is a quantity inclusive of an oversupply quantity measured by the measuring device in each of the minute current applying durations.

REFERENCES:
patent: 3202317 (1965-08-01), Fath et al.
patent: 4222448 (1980-09-01), Sunkle et al.
patent: 4354620 (1982-10-01), Tsuneda et al.
patent: 4366872 (1983-01-01), Brunnschweiler et al.
patent: 4370779 (1983-02-01), Meier
patent: 4381545 (1983-04-01), Biddle, III et al.
patent: 4442953 (1984-04-01), Miyamoto et al.

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