Patent ID: 8142726

Claim:
A chemical oxygen generator to produce cool oxygen gas comprising: a. a charge housing b. a solidified charge having pores contained in the said housing, the charge being made of a homogenous chemical mixture that generates oxygen upon decomposition and that will undergo a self-sustained exothermal decomposition after initiation, the said charge containing at most 3.0 wt. % of an inorganic binder material selected from the group consisting of sodium silicate, potassium silicate, and a mixture thereof, where the said charge is made from granular material bonded together by said binder material and having a porosity between 41% and 61%, and wherein the charge has a compression strength larger than 0.67 MPa and a Modulus of Elasticity under compression larger than 50 MPa, the said charge allows the generated oxygen to pass through the charge without damaging a virgin material and without creating volumetric burning, the said charge is mounted in the housing in such a way that the generated oxygen passes through the charge and under the pressure difference flows from a moving decomposition front towards the vent, and is cooled down to the ambient temperature due to heat exchange with the charge; c. an ignition device mounted at one end of the cartridge in such a way that it is capable to initiate a self-sustained decomposition of the charge at the charge surface adjacent to the initiator, d. an inert porous mass filter to remove sufficient heat from the oxygen towards the end of the reaction to provide oxygen gas less than 50° C., and e. a vent for discharging the generated oxygen that has passed through the generating-porous charge and filter; f. wherein the temperature of the vented oxygen gas is less than 50° C. substantially throughout the entire use of the generator.