Chemical oxygen generator
First Claim
1. In an oxygen-generating candle for producing a breathable gas and including therein an amount of an oxygen source which upon ignition and decomposition thereof will yield oxygen and residual chlorine, the improvement which comprises from about 0.5-15% by weight of a metal powder fuel, from about 20-99% by weight of an oxygen source selected from the group consisting of sodium chlorate, potassium chlorate, lithium chlorate, sodium perchlorate, potassium perchlorate and lithium perchlorate and from about 0.05-10% by weight of a nontoxic additive incorporated into said candle for suppression of said residual chlorine and smoothing the decomposition of said candle, said additive being selected from the group consisting of:
- (1) the oxides, hydroxides and carbonates of calcium and the rare earth elements;
(2) the hydroxides and carbonates of magnesium; and
(3) mixtures of the foregoing, said additive being in intimate admixture with said fuel and oxygen source for suppressing the formation of free chlorine and smoothing the decomposition of said candle upon said ignition thereof, said candle being operable for producing said breathable gas over a period of several minutes.
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Accused Products
Abstract
An improved chemical oxygen generator (10) includes an oxygen generating candle (12) having an oxygen source, which upon decomposition will yield oxygen, and a nontoxic additive to smooth decomposition and suppress formation of toxic free chlorine gas. The nontoxic additive may be taken from the group consisting of: (1) the oxides, hydroxides and carbonates of calcium and the rare earth elements; (2) the hydroxides and carbonates of magnesium; and (3) mixtures of the foregoing. A complete chemical oxygen generator utilizes the candle (12) of the invention. The oxygen generator preferably includes a canister (14), oxygen-generating candle (12), and an ignition device (16). Triggering of the ignition device ignites an ignition pellet (52) which initiates decomposition of the candle body (50). Once initiated, the candle will sustain decomposition to release breathable oxygen until the candle is completely reacted.
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Citations
13 Claims
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1. In an oxygen-generating candle for producing a breathable gas and including therein an amount of an oxygen source which upon ignition and decomposition thereof will yield oxygen and residual chlorine, the improvement which comprises from about 0.5-15% by weight of a metal powder fuel, from about 20-99% by weight of an oxygen source selected from the group consisting of sodium chlorate, potassium chlorate, lithium chlorate, sodium perchlorate, potassium perchlorate and lithium perchlorate and from about 0.05-10% by weight of a nontoxic additive incorporated into said candle for suppression of said residual chlorine and smoothing the decomposition of said candle, said additive being selected from the group consisting of:
- (1) the oxides, hydroxides and carbonates of calcium and the rare earth elements;
(2) the hydroxides and carbonates of magnesium; and
(3) mixtures of the foregoing, said additive being in intimate admixture with said fuel and oxygen source for suppressing the formation of free chlorine and smoothing the decomposition of said candle upon said ignition thereof, said candle being operable for producing said breathable gas over a period of several minutes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- (1) the oxides, hydroxides and carbonates of calcium and the rare earth elements;
Specification