Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1981-05-12
1982-10-26
Spiegel, H. Jay
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
137854, 261DIG7, 251 611, G05D 700
Patent
active
043556531
ABSTRACT:
The present invention describes a vented check valve for use with post-mix carbonators. The vented check valve is a fail safe device which will vent carbon dioxide or carbonated water to the atmosphere when a back flow condition occurs. The vented check valve of the present invention includes a flexible valve diaphragm having a first valve seat portion around the annular portion of the diaphragm and a second valve seat portion in the center thereof. The first valve seat portion is utilized to open and close the main water inlet by permitting the edges of the diaphragm to flex in response to the pressure of water flowing in a first direction. The second valve seat portion is disposed in cooperation with a vent passage and seats firmly on the vent passage while water flows in the first direction, but unseats from the vent passage permitting the water to flow out of the valve, through the vent passage to the atmosphere when a back flow condition occurs, i.e., namely, when the water flows in a direction opposite to the first direction.
REFERENCES:
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patent: 3765318 (1973-10-01), Mazza
patent: 3780198 (1973-12-01), Pahl et al.
patent: 4084606 (1978-04-01), Mittleman
Spiegel H. Jay
The Coca-Cola Company
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