Be Intellectual Property, Inc.

Nellcor Puritan Bennett Incorporated

B/e Aerospace, Inc.

Yunchang Zhang

James C Cannon

Girish S Kshirsagar

Michael J Brumely

John E Ellison

Girish Kshirsagar

Rainer Ernst

Gerald Maroske

A chemical oxygen generator includes multiple parallel sequentially connected chemical core sections that extend the duration of operation of the chemical oxygen generator. An end of a first core section is contiguous with a chemical core high reactivity section, and a thermal insulation layer is disposed between an end of a second core section and the chemical core ignition plate, as well as between the bodies of the first and second core sections. A chemical core transition section is disposed between the other end of the first core section and the second core section, to insure that the reaction front propagates properly.

Chemical oxygen generator with chemical cores arranged in parallel

The oxygen generating compositions are formed from a metal powder as a fuel, strontium peroxide as a chlorine suppressant, a catalyst, a reaction rate modifier, and an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof. The oxygen generating compositions can optionally also further comprise a transition metal oxide catalyst, and can optionally further include a binder as a pressing aid for forming an oxygen generating oxygen generating block or core. The oxygen generating compositions can be formed from zero to about 15% by weight of metal powder as a fuel, about 0.1%-20% by weight strontium peroxide, from zero to about 15% by weight of a transition metal oxide catalyst, from zero to about 5% of an optional binder, and the remainder of an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof.

Strontium peroxide catalyzed oxygen generating compositions

The filter contains about 1-15% lithium hydroxide and about 85-99% hopcalite material, having a particle size of approximately 20 to 100 mesh, and can be used in combination with a chemical oxygen generator for removing chlorine gas and carbon monoxide.

Filter for chemical oxygen generators

The oxygen generation compositions include about 0.5-15% by weight of a substantially carbon-free metal fuel, and about 0.1-20% by weight of alkali metal silicate, stannate, titanate or zirconate as a reaction rate and core rheology modifier and chlorine suppresser. The oxygen generating compositions also contain about 0.1-15% by weight of a transition metal oxide catalyst; and the remainder is substantially an alkali metal chlorate or perchlorate.

Low temperature sensitivity oxygen generating compositions

The filer contains about 1-15% lithium hydroxide and about 85-99% hopcalite material, having a particle size approximately 20 to 100 mesh, and can be used in combination with a chemical oxygen generator for removing chlorine gas and carbon monoxide.

The oxygen generation composition utilizes magnesium oxide to modify and smooth the oxygen generation rate, suppress chlorine formation, improve the rheology and uniformity of performance of an operating chemical oxygen candle, and to facilitate the mixing of the candle ingredients. The oxygen generation composition typically comprises a metal powder as a fuel; magnesium oxide; and an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof. The composition can also include a transition metal oxide catalyst, and can include a binder.

Oxygen generating compositions

The chlorate/perchlorate based oxygen generating compositions contain about 0.5-15% by weight of metal powder for use as a fuel selected from the group consisting of iron, nickel, cobalt and mixtures thereof; about 0.1% to about 15% by weight of at least one transition metal oxide catalyst; greater than 5% to about 25% by weight of an alkali metal silicate as a reaction rate and core rheology modifier, binder and chlorine suppresser; and the remainder substantially comprising an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof. The alkali metal silicate can be selected from the group consisting of sodium metasilicate, sodium orthosilicate, lithium metasilicate, potassium silicate, and mixtures thereof. The oxygen generating composition can also optionally contain a binder selected from the group consisting of glass powder, fiber glass and mixtures thereof.

Oxygen generating formulation with high structural integrity

The filter contains about 1-5% lithium hydroxide and about 85-99% hopcalite material, having a particle size of approximately 20 to 100 mesh, and can be used in combination with a chemical oxygen generator for removing chlorine gas and carbon monoxide.

The oxygen generating compositions contain carbon-free metal powder as fuel to minimize generation of carbon monoxide. The carbon-free metal powder can be selected from copper, zinc, and antimony, and mixtures thereof, and can be used in combination with tin or iron. The oxygen generating compositions produce a breathable gas upon ignition of the composition, and comprise about 1-15% by dry weight of the metal powder as a fuel; about 0.1-5% by dry weight of at least one alkaline compound; a transition metal oxide catalyst; and the remainder substantially comprising an oxygen source. The oxygen generating compositions can optionally include a binder. An oxygen generating candle can also have an ignition pellet having a composition of about 25-50% by weight copper, zinc or antimony, 5-20% by weight Co.sub.3 O.sub.4, about 2-5% by weight glass powder, 0-25% by weight KClO.sub.4, and the balance being substantially NaClO.sub.3.

The oxygen generation composition utilizes a catalyst selected from the group consisting of copper oxide, nickel oxide, and mixtures thereof, to catalyze the reaction or a chlorate or perchlorate based oxygen generating composition, smooth oxygen generation, improve the rheology of an operating chemical oxygen candle, and to facilitate the mixing of the candle ingredients. The oxygen generation composition typically comprises about a metal powder as a fuel; a catalyst selected from the group consisting of copper oxide, nickel oxide, and mixtures thereof; an additive as a chlorine remover and reaction rate modifier; and an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof. The oxygen generating composition can optionally further include a binder.

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Overland Park, KS, United States of America

Yunchang Zhang