Portable cooler using CO.sub.2 for temporary cooling

Details Portable cooler using CO.sub.2 for temporary cooling Portable cooler using CO.sub.2 for temporary cooling

1996-10-25

1998-01-27

Doerrler, William C.

Refrigeration

Cooled enclosure

Portable receptacle

62237, 62401, 624577, F25D 1308, F25D 900

Patent

active

057111642

ABSTRACT:
A portable cooler is provided including a plastic bag or container with inflatable sidewalls into which are placed items for cooling, such as infant feeding bottles, food, soft drinks, etc. Prior to using these items, the sidewalls of the bag are inflated with CO.sub.2 gas, which upon expansion, sufficiently cools the interior of the bag, and chills the food. The plastic bag may also contain a frozen gel package to provide temporary cooling prior to use, and augment cooling by the CO.sub.2. In a similar manner, cooling may be provided using a relatively stiff container having hollow sidewalls and/or a bottom into which may be expanded CO.sub.2 gas to provide cooling prior to use. A frozen gel package may be placed inside the container or in the top portion of the container to augment CO.sub.2 gas cooling. The same technique of cooling may also be accomplished using the expansion of CO.sub.2 gas into the sidewalls of a thermos container.

REFERENCES:
patent: 2900808 (1959-08-01), Wang
patent: 3148515 (1964-09-01), Jentis et al.
patent: 3633381 (1972-01-01), Haaf et al.
patent: 3665728 (1972-05-01), Stoller
patent: 4058384 (1977-11-01), Keefe
patent: 4766740 (1988-08-01), Bradley et al.
patent: 5115940 (1992-05-01), Friedman
patent: 5337579 (1994-08-01), Saia et al.
patent: 5400610 (1995-03-01), Macedo
patent: 5555740 (1996-09-01), Stevenson

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