Patent ID: 7891199

Claim:
A self-cooling beverage container comprising: a container body having a top and a bottom, a side wall connecting said top and bottom, said top including an openable portion; at least one pressure vessel substantially housed within said container body, said pressure vessel containing a refrigerant under pressure; means for retaining said pressure vessel within said container body; a refrigerant metering device having an inlet in fluid communication with said refrigerant, and an outlet; an actuation valve configurable from a closed configuration wherein said metering device outlet is closed, to an open configuration wherein said metering device outlet is open and exposed to the pressure within the container body; said actuation valve including means for equalizing pressure within said actuation valve to pressure within said container body; said actuation valve maintained in said closed configuration when pressure within said container body is greater than atmospheric pressure; and said actuation valve being automatically configured to said open configuration by pressure therein upon opening of said container body open portion and reduction of pressure within said container body to substantially atmospheric pressure; whereby said actuation valve open configuration allows for refrigerant expansion and flow through said outlet conduit thereby cooling contents of said container.