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Respirator
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Inventors: Brauer, Lothar W.;
Assignee: Auergesellschaft GmbH (Berlin, DE)
Primary Examiner: Scovronek; Joseph
Assistant Examiner:
Attorney, Agent or Firm: Brown, Flick & Peckham
A chemical canister for use in a respirator has opposed openings, one for connection to a mouthpiece and the other for connection to the rest of the respirator. The canister contains a carbon dioxide removing and oxygen liberating chemical, and there also is a chemical which, upon being heated, will liberate nitrogen to mix with the oxygen liberated in the canister. |
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DETAILED DESCRIPTION I claim: 1.
A chemical unit for use in a respirator, comprising a canister having opposed openings, one of said openings being adapted to be connected to a mouthpiece for inhalation and exhalation through the canister, a body of a carbon dioxide removing and oxygen liberating chemical in the canister between said openings, and a body of a nitrogen liberating chemical inside the canister for supplying nitrogen to the canister, said last-mentioned chemical liberating the nitrogen when ignited.
2.
A chemical unit according to claim 1, in which the relative sizes of said chemical bodies are such that the gas inhaled from the canister will contain from 21% to 90% oxygen, with the rest of the gas consisting principally of nitrogen.
3.
A chemical unit according to claim 2, in which the percentage of oxygen in said gas is between 30% and 70%.
4.
A chemical unit according to claim 1, in which said chemical that liberates nitrogen is ammonium nitrite.
5.
A chemical unit according to claim 1, in which said chemical that liberates nitrogen is sodium azide.
6.
A chemical unit according to claim 1, in which said canister is provided between said opposed openings with an opening exposing a portion of said body of nitrogen liberating chemical for ignition.
Description:
It is known that the inhaling of pure oxygen when a man is doing heavy work, for example, or under conditions that deviate from normal atmospheric pressure, is physiologically detrimental to the person concerned.
Premature symptoms of weariness may become evident or, for example, if the respirator is used for a long time, physiologically-conditioned breakdowns may occur in the user's metabolism.
It is among the objects of this invention to provide respirator oxygen supplying apparatus, with which the premature appearance of weariness and/or metabolic breakdowns are reduced as much as possible.
These objects are accomplished by the use of an additional unit; namely, a chemical body that liberates nitrogen into the inhaled gas
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