Apparatus reponsive to pressure of a medium which effects fluid

Details Apparatus reponsive to pressure of a medium which effects fluid Apparatus reponsive to pressure of a medium which effects fluid

1991-03-29

1993-02-23

Kashnikow, Andres

Dispensing

Automatic control

Of dispensers with fluid pressure discharge assistance

156356, 118684, B65D 8314

Patent

active

051882582

ABSTRACT:
A quantitative fluid discharge device includes an arrangement for pressurizing fluid within a container and discharging the fluid from the container at a predetermined rate. A dispense control apparatus is provided for controlling the rate of fluid discharge from the container. The dispense control apparatus includes a keyboard from which signals for effecting initialization and discharge may be input, and a microcomputer for receiving those signals from the keyboard. An interface receives a digital pressure command signal from the microcomputer, and an electropneumatic regulator receives an analog pressure command signal from this interface. The electropneumatic regulator includes an air channel, and a solenoid valve is disposed in a middle part of this air channel. A pressure sensor for detecting the discharge air pressure acting on the fluid is disposed at a location which permits detection of the discharge air pressure while the fluid is being discharged from the container.

REFERENCES:
patent: 3347418 (1967-10-01), Fefferman
patent: 3666143 (1972-05-01), Weston
patent: 3804299 (1974-04-01), Kain
patent: 4874444 (1989-10-01), Satou et al.
"Electropneumatic Liquid Microdispenser" V. F. Matveer, M. B. Arturov and L. M. Meilakha, Ind. Lab. (USA), vol. 46, No. 7 (Jul. 1980) (Publ. Jan. 1981).

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