Patent · US Expired

Respirator with several regeneration cartridges and breather bags

US5042471A · kind A · utility

5Cited by

4References

8Claims

0Family size

Assignee

DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

Wolfgang Drews · Bahrenhof, DE
Ernst-Gunther Kolbe · Mölln, DE
Hasso Weinmann · Lübeck, DE

Key dates

Filing date	Nov 29, 1989
Grant date	Aug 27, 1991
Priority date	—
Expiry date	Nov 29, 2009

Classification

Technology area (CPC A)Human Necessities
CPC primaryA62B7/08
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A respirator with regeneration of the respired air by several chemical fillings, which emit oxygen and bind carbon dioxide and are disposed in parallel in the respiratory passage between a mouthpiece and a breather bag is to be improved, so that a uniform utilization of the chemicals in the fillings is achieved. The different resistances of the respiratory paths of the fillings are to be evened up so that the pollutant load on and the consumption of the fillings can be divided up evenly over the existing fillings during the whole of the period of use. For this purpose, provisions are made so that each filling is connected to its own breather bag for accommodating the exhaled air flowing through it.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.