Patent ID: 7527612

Claim:
A cooling device comprising: a. a garment; b. an inlet attached to the garment for connecting to a source of carbon dioxide (CO 2 ); c. a first set of one of more conduits for distributing CO 2 to one or more areas of the garment such that the garment, and a second set of one or more conduits; is effective to cool the wearer of the garment; d. one or more controls for changing the phase of the CO 2 in order to provide two stage cooling wherein in a first stage the CO 2 assumes a liquid/gas biphasic state and in a second stage the CO 2 assumes a gaseous state; e. the one or more controls including a pressure regulator disposed between the first and second sets of conduits for maintaining the first stage in a generally liquid/gas biphasic state; and f. wherein the device performs a two stage cooling operation wherein in a first stage heat is transferred from the wearer to the CO 2 by conduction while at least a portion of the CO 2 changes from a liquid state to a gaseous state, and wherein in a second stage heat is transferred from the wearer by evaporative cooling while gaseous CO 2 is dispersed into an area adjacent the wearer.