Garment cooling system

Claim 2

A personal cooling system for protecting a human from high temperature exposure comprising, in combination: an outer garment; heat sink means operatively disposed on the outside of said garment for exchanging heat during vaporization, and including an expendable mass of cryogenic matter for vaporizing into gas in the process of heat exchange; heat transfer means disposed within said garment thermally connected at either end to said heat sink means for transferring heat from said garment to said heat sink means, and including a flexible tubing network disposed within said garment forming a plurality of parallel loop sections commonly joined at the corresponding ends thereof, two closed chambers operatively connected one at each end of said tubing network, said chambers being thermally connected to said heat sink means, and a quantity of heat transfer fluid contained within the volume formed by said network and said chambers; and pressurization means enclosing said heat sink means connected to the ends of said heat transfer means for powering said heat transfer means with the vaporization of said heat sink means, and including a closed housing formed between said two chambers and having respective sides in common therewith, a manifold connecting the upper end of said housing with respective upper ends of said chambers, two floats deployed in respective ones of said chambers and carried by said fluid, two first ball valves operatively connected to respective ones of said floats formed to close said manifold at a predetermined lower levEl of said fluid within said chambers, two second ball valves each respectively connected to said floats formed to open and vent said chambers at said predetermined lower level of said fluid, and limiting means disposed within said chambers for maintaining said floats at respective lower levels until said fluid reaches a predetermined higher level.

Claim 3

A personal cooling system according to claim 1, further comprising: said limiting means including cylindrical float guides vertically disposed within respective chambers containing said floats, said float guides being open at the upper end thereof and having respective lateral passages at the bottom end thereof, corresponding externally closed flapper valves disposed across said passages, whereby an increase in fluid within said chamber is excluded from the inside of said float guides until the fluid level reaches the upper end thereof.

Claim 4

A cooling system comprising: vaporizable heat sink means for exchanging heat during vaporization, and including an expendable mass of cryogenic matter for vaporizing into gas in the process of heat exchange; heat transfer means adapted to be thermally connected to an object to be cooled and thermally connected to said heat sink means for transferring heat from the object to said heat sink means, and including a tubing network adapted to be disposed in thermal contact with the object, two closed chambers operatively connected one at each end of said tubing network, said chambers being thermally connected to said heat sink means, a quantity of heat transfer fluid contained within the volume formed by said network and said chambers; and pressure utilization means enclosing said heat sink means and operatively connected to said transfer means for powering said transfer means with the pressure produced by vaporization of said heat sink means, and including a closed housing formed between said two chambers and having respective sides in common therewith, a manifold connecting the upper end of said housing with respective upper ends of said chambers, two floats deployed in respective ones of said chambers and carried by said fluid, two first ball valves operatively connected to respective ones of said floats formed to close said manifold at a predetermined lower level of said fluid within said chambers, two second ball valves each respectively connected to said floats formed to open and vent said chambers at said predetermined lower level of said fluid and cylindrical float guides vertically disposed within respective chambers containing said floats, said float guides being open at the upper end thereof and having respective lateral passages at the bottom end thereof, corresponding externally closed flapper valves disposed across said passages, whereby an increase in fluid within said chamber is excluded from the inside of said float guides until the fluid level reaches the upper end thereof.

Claim 5

A cooling system comprising: vaporizable heat sink means for exchanging heat during vaporization, and including an expendable mass of cryogenic matter for vaporizing into gas in the process of heat exchange; heat transfer means adapted to be thermally connected to an object to be cooled and thermally connected to said heat sink means for transferring heat from the object to said heat sink means, and including a tubing network adapted to be disposed in thermal contact with the object, two closed chambers operatively connected one at each end of said tubing network, said chambers being thermally connected to said heat sink means, a quantity of heat transfer fluid contained within the volume formed by said network and said chambers; and pressure utilization means enclosing said heat sink means and operatively connected to said transfer means for powering said transfer means with the pressure produced by vaporization of said heat sink means, and including a closed housing formed between said two chambers and having respective sides in common therewith, a manifold connecting the upper end of said housing with respective upper ends of said chambers, two floats deployed in respective ones of said chambers and carried by said fluid, two first ball valves operatively connected to respective ones of said floats formed to close said manifold at a predetermined lower level of said fluid within said chambers, two second ball valves each respectively connected to said floats formed to open and vent said chambers at said predetermined lower level of said fluid and cylindrical float guides vertically disposed within respective chambers containing said floats, said float guides being open at the upper end thereof and having respective lateral passages at the bottom end thereof, corresponding externally closed flapper valves disposed across said passages, whereby an increase in fluid within said chamber is excluded from the inside of said float guides until the fluid level reaches the upper end thereof.