Patent · US Expired

Protective breathing device

US4821711A · kind A · utility

10Cited by

10References

6Claims

0Family size

Assignee

Draegerwerk Aktiengesellschaft · DE

Inventors

Wolfgang Eckstein · Sereetz, DE
Wolfgang Drews · Bahrenhof, DE

Key dates

Filing date	Jan 7, 1988
Grant date	Apr 18, 1989
Priority date	—
Expiry date	Jan 7, 2008

Classification

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

Abstract

A protective breathing device with regeneration of the breathed air includes a regeneration cartridge arranged in the flow between a breath intake and a breathing bag. The device provides effective cooling of the inhaled air and the best possible protection of the wearer against touching the heated cartridge while keeping the overall arrangement as compact and easy to wear as possible. For this purpose, a breathing bag 16 is divided into two partial bag, the first being an exhalation pouch containing a regeneration cartridge, which is arranged to force exhaled air into a second partial bag, or inhalation bag through valving the regenerated breathing air is connected back to a breathing mouth piece.

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