The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 1997
Filed:
Mar. 30, 1995
Michael Schwichtenberg, Berlin, DE;
Volker Hunnebeck, Berlin, DE;
Auergesellschaft GmbH, , DE;
Abstract
A chemical oxygen device having one or more CO.sub.2 -bonding and O.sub.2 -releasing chemical canisters (2) arranged in a housing (1); a breathing bag (3) for the exhaled air, which itself is arranged in a breathing bag (7) for the inhaled air; an inhalation valve (4); an exhalation valve (5); and a particle filter (6). The usage conditions of chemical oxygen devices is improved by reducing breathing resistances and by an indication of consumption indication in which, at any time, the supply of breathing gas still available is indicated. A bellows (8) is arranged between the breathing bag (3) and chemical canisters (2) to reduce the breathing resistances and the particle filter (6) is arranged at the input of the breathing bag (7). The bellows (8) is connected to an evaluation unit (9), via which the wearer of the chemical oxygen device can check at any time the supply of breathing gas still available.