Slurry dispensing system having self-purging capabilities

Details Slurry dispensing system having self-purging capabilities Slurry dispensing system having self-purging capabilities

1988-04-27

1988-11-15

Rolla, Joseph J.

Dispensing

With cleaning means

222318, 222424, 239119, 239126, 51263, B65D 8854

Patent

active

047842954

ABSTRACT:
An enclosed slurry dispensing system employs a sealed pressurized reservoir for supplying slurry through a bypass chamber to a dispensing nozzle. Excess slurry is bypassed through the bypass chamber to an intermediate chamber. Slurry is allowed to return to the reservoir through a normally-closed check valve, closed by the higher pressure of the reservoir. The system is purged by opening the reservoir to the atmosphere, creating a sub-atmospheric pressure in the bypass chamber. Air is admitted through the nozzle to purge the nozzle of slurry. At the same time, the check valve opens and excess slurry returns to the reservoir from the intermediate chamber.

REFERENCES:
patent: 3019522 (1962-02-01), Bluth
patent: 4242841 (1981-01-01), Ushakov
patent: 4513894 (1985-04-01), Doyle
patent: 4678119 (1987-07-01), Doyle

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