Gas and liquid contact apparatus – Fluid distribution – Pumping
Reexamination Certificate
2000-01-04
2001-07-24
Chiesa, Richard L. (Department: 1724)
Gas and liquid contact apparatus
Fluid distribution
Pumping
C261S036100, C261S076000, C261SDIG007
Reexamination Certificate
active
06264174
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an emulsifier, and more specifically to a high-pressure tank for use in an emulsifier, which uses a venturi tube and an air valve to guide outside air into the liquid passing through.
In an emulsifier, a high pressure tank
12
is connected between a bubble generator
11
and a water pipe
14
, a water pump
141
is controlled to pump a liquid from the water pipe
14
into the high pressure tank
12
, and an air pump
151
is controlled to pump air through an air pipe
15
into the high pressure tank
12
for mixing with the liquid, enabling the mixture to be further delivered to the bubble generator
11
. The high-pressure tank
12
further comprises a relief valve
13
at the top for output of excessive high pressure. Because the air and the liquid have different pressures, they cannot be well mixed in the high-pressure tank
12
.
SUMMARY OF THE INVENTION
The present invention eliminates the aforesaid problem. According to the present invention, a venturi tube is connected between the high pressure tank and the water pipe for circulation of the liquid, and an air valve is installed in the venturi tube to let outside air be drawn into the venturi tube for mixing with the liquid. The air mixed liquid is guided into the water pipe, and then pumped by the water pump into the high-pressure tank again. This arrangement eliminates the installation of the air pump and air pipe as used in the prior art design, and enables air to be well mixed with the liquid.
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patent: 5968352 (1999-10-01), Ditzler
patent: 6054046 (2000-04-01), Nelson
Chang Tsun Shin
Chuang Shih Ching
Bacon & Thomas PLLC
Chiesa Richard L.
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