Oxygen self-rescuer apparatus

US5222479A · kind A · utility

Assignee

• Auergesellschaft GmbH · DE

Inventors

• Lothar Brauer · Berlin, DE
• Klaus-Dieter Dahrendorf · Berlin, DE
• Volker Hunnebeck · Berlin, DE
• Klaus Haertle · Berlin, DE
• Werner Mascher · Berlin, DE
• Udo Mushold · Berlin, DE
• Klaus Pampuch · Berlin, DE
• Ulrich Timm · Wauwatosa, US
• Bernd Woicke · Berlin, DE
• Stefan Zloczysti · Berlin, DE

Key dates

• Filing date: Jun 19, 1991
• Grant date: Jun 29, 1993
• Expiry date: Jun 19, 2011

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A62B7/08
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A self-contained portable personal breathing apparatus that has a casing housing a canister containing an oxygen evolving chemical. The casing is disposed inside a cover which is disposed inside a bag. The cover and the casing form a thermal insulating pocket between them, and with the cover material and the casing material, also made of thermally insulating material, a triple layer of thermal insulation is formed around the canister to protect oxygen produced therein from the heat of reaction of the chemical in the canister. A heat exchanger is situated atop the canister to further cool oxygen before inhalation, and breathing tube extends from the bag to the user for channeling exhaled breath and oxygen.