Oxygen-generating breathing apparatus

US8230854B2 · kind B2 · utility

Assignee

• MSA Auer GmbH · DE

Inventors

• Frank Krüger · Könnern, DE
• Karl-Heinz Feldner · Berlin, DE
• Karl-Heinz Kohricht · Berlin, DE

Key dates

• Filing date: Jan 19, 2006
• Grant date: Jul 31, 2012
• Expiry date: Feb 28, 2029

Classification

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

Abstract

The chemical cartridge of a breathing apparatus, through which respiratory air flows to generate oxygen is divided into a plurality of air treatment chambers by retaining grids. An impact-damping member including a multilayer fine wire mesh, which abuts flat against the relevant cover is located in the external air treatment chambers while provided in the middle air treatment chambers is a damping element including a multilayer fine-wire mesh folded in a zigzag fashion, having folded edges running parallel and at a distance from the outer wall of the chemical cartridge, one edge thereof running in a zigzag fashion is fixed to a wire grid. The damping elements of the adjacent air treatment chambers are not in alignment. Potassium hyperoxide granules for oxygen generation are located in the air treatment chambers. One air treatment chamber can be filled with lithium hydroxide tablets for binding excess carbon dioxide.