Chemical oxygen generator

• US 5,804,146 A
• Filed: 03/04/1997
• Issued: 09/08/1998
• Est. Priority Date: 04/19/1996
• Status: Expired due to Term

• Current Assignee: B/E Aerospace Systems GmbH (Rtx Corporation)
• Original Assignee: Dragerwerk AG
• Inventors: Ernst, Rainer, Burchardt, Udo, Heyer, Harald
• Primary Examiner(s): TRAN, HIEN THI
• Application Number:
  US08/810,400
• Time in Patent Office: 553 Days
• Field of Search: 422/128, 422/122, 422/120, 422/126, 422/164-165, 95/132, 95/131, 96/135, 128/202.26
• US Class Current: 422/126
• CPC Class Codes: A62B 21/00 Devices for producing oxygen from chemical substances for respiratory apparatus
• CPC Class Codes: B01D 2251/304 of sodium
• CPC Class Codes: B01D 2251/404 of calcium
• CPC Class Codes: B01D 2251/60 Inorganic bases or salts
• CPC Class Codes: B01D 2253/25 Coated, impregnated or composite adsorbents
• CPC Class Codes: B01D 2256/12 Oxygen
• CPC Class Codes: B01D 2257/2025 Chlorine
• CPC Class Codes: B01D 53/0415 Beds in cartridges
• CPC Class Codes: C01B 13/0296 Generators releasing in a self-sustaining way pure oxygen from a solid charge, without interaction of it with a fluid nor external heating, e.g. chlorate candles or canisters containing them charges per se C01B13/02

Abstract

A chemical oxygen generator with a chemical mass, which is accommodated inside a container, generates oxygen by a chemical reaction, and is held in the container by a gas-permeable fibrous material. The fibrous material is arranged around the chemical mass. The fibrous material is designed as a chemical sorption filter.

Claims

1. A chemical oxygen generator, comprising:

a container;

a chemical mass, which is accommodated inside said container, for generating oxygen by a chemical reaction;

a gas-permeable fibrous material arranged around said chemical mass for holding said chemical mass; and

a sorption material impregnated in said gas-permeable fibrous material;

said gas-permeable fibrous material and said sorption material form a sorption filter and a sorbent for chlorine is provided in said sorbent material and is sodium hydroxide or calcium hydroxide.

2. A chemical oxygen generator in accordance with claim 1, wherein said fibrous material is a ceramic fiber.

3. A generator in accordance with claim 1, wherein:

said chemical mass also generates a plurality of impurities;

said sorption material chemically reacts with one of said plurality of impurities.

4. A generator in accordance with claim 3, wherein:

said fibrous material physically blocks another one of said impurities.

5. A generator in accordance with claim 3, wherein:

said one of said impurities is a gas.

6. A generator in accordance with claim 1, wherein;

said sorption material is intermixed with said fibrous material.

7. A chemical oxygen generator comprising:

a container;

a chemical mass, which is accommodated inside said container, for generating oxygen by a chemical reaction; and

a gas-permeable fibrous material arranged around said chemical mass for holding said chemical mass, said fibrous material being impregnated with one of sodium hydroxide and calcium hydroxide as a sorbent for chlorine.

8. A chemical oxygen generator in accordance with claim 7, wherein said fibrous material is a ceramic fiber.