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US 6,158,482 AGranted
Apparatus and method for filling carbon dioxide cylinders
OwnerJulius Rubininventor
Life of this patent
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OwnerJulius Rubininventor
Estimating the term…
A device for filling a high-pressure CO.sub.2 cylinder with liquid CO.sub.2 while venting gaseous CO.sub.2 comprises a two-compartment chamber that is installed in the top opening of the cylinder. A first dip tube connected to one compartment extends to the bottom portion of the cylinder and a second dip tube connected to the other compartment extends to the upper portion of the cylinder. Each compartment has a port for flow into or out of the compartment. Liquid CO.sub.2 introduced into the compartment with the first dip tube will flow into the cylinder and cause gaseous CO.sub.2 to exit through the second dip tube and the other compartment. When liquid CO.sub.2 appears in the exiting stream, the introduction of liquid CO.sub.2 is stopped. In a common embodiment, a conventional CO.sub.2 valve has the first dip tube connected to the bottom thereof. A street tee with one end connected to the second dip tube is screwed into the top opening of the cylinder. The CO.sub.2 valve is screwed into the other end of the tee, the first dip tube extending with annular clearance through the second dip tube into the cylinder.
An apparatus for introducing liquid CO.sub.2 into a high-pressure cylinder having a single top opening and simultaneously venting gaseous CO.sub.2 from said cylinder, which comprises sealing means for said top opening, and two flow passageways extending through said sealing means into said cylinder to different levels therein, the passageway extending to a lower level in said cylinder serving for the introduction of liquid CO.sub.2 and the passageway extending to a higher level in said cylinder serving for the venting of gaseous CO.sub.2 from said cylinder.
In a high-pressure CO.sub.2 cylinder having a top threaded opening, the improvement of means for introducing liquid CO.sub.2 into, and simultaneously venting gaseous CO.sub.2 from, said cylinder, which comprises a two-compartment chamber installed in said top opening, a first dip tube for introducing liquid CO.sub.2 connected to one compartment and extending into the bottom portion of said cylinder, a second dip tube for venting gaseous CO.sub.2 connected to the other compartment and extending into the upper portion of said cylinder, and a port to each compartment outside said cylinder.
An apparatus for filling a high-pressure cylinder having a top threaded opening with liquid CO.sub.2 and simultaneously venting gaseous CO.sub.2 from said cylinder, which comprises
The method of filling a high-pressure cylinder having a top opening with liquid CO.sub.2 while venting gaseous CO.sub.2 therefrom, which comprises installing in said top opening a sealing device having two flow passageways extending therethrough to different levels in said cylinder, introducing liquid CO.sub.2 into the passageway that extends to a low level in said cylinder, venting gaseous CO.sub.2 through the passageway that extends to a higher level in said cylinder, and stopping the introduction of liquid CO.sub.2 when the vented CO.sub.2 becomes liquid and/or solid.
Dependencies are inferred from the claim text.