Apparatus and method for producing and injecting sterile cryogen

Details Apparatus and method for producing and injecting sterile cryogen Apparatus and method for producing and injecting sterile cryogen

1995-06-07

1996-07-09

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

Liquified gas transferred as liquid

62908, 422 28, F17C 702

Patent

active

055333419

ABSTRACT:
An apparatus for producing and injecting a sterile cryogenic liquid (for example into a container of food) is provided, as well as a method of use of same. The apparatus includes at least one purge-swept cryogenic liquid filter, the filter including filter media having the capability to effectively sterilize cryogenic liquids, the filter media positioned within a housing to accept non-sterile cryogenic liquid and produce sterile cryogenic liquid, and to recycle an amount of the non-sterile cryogenic liquid. The apparatus further includes at least one sterile cryogenic liquid accumulator, the sterile cryogenic liquid accumulator having a sterile cryogenic liquid outlet for dispensing sterile cryogenic liquid, the sterile cryogenic liquid outlet having a passageway for a sterile cryogenic gas, whereby the sterile cryogenic gas prevents contact of the sterile cryogenic liquid with a non-sterile atmosphere via pressurization and purging during dispensing of same.

REFERENCES:
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"BM Series Bellows Metering And Regulating Valves", NUPRO.
"DS Series Diaphragm Valves", NUPRO.
"Membralox ceramic gas filters", U.S. Filter.

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