Patent · US Expired

Oxygen respirator with oxygen-supplying chemical cartridge

US4154236A · kind A · utility

8Cited by

3References

11Claims

0Family size

Assignee

DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

Wolfgang Eckstein · Sereetz, DE
Gerd Pantaleon-Stemberg · Mölln, DE
Adalbert Pasternack · Bad Schwartau, DE
Bodo Heins · Arfrade, DE

Key dates

Filing date	Jul 11, 1977
Grant date	May 15, 1979
Priority date	—
Expiry date	Jul 11, 1997

Classification

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

Abstract

An oxygen respirator, comprises a portable container having a cartridge chamber with a cylindrical oxygen-supplying chemical cartridge centrally located in the chamber and with a replaceable CO.sub.2 -absorbing cartridge concentrically surrounding the chemical cartridge. The cartridge chamber is closed by a baseplate which includes a mouthpiece connection defining a mouthpiece passage for respirator air for the user which connects downwardly into the chamber through an associated check valve for flow downwardly through the annular CO.sub.2 -absorbing cartridge and upwardly through the oxygen-supplying chemical cartridge which, after initial ignition, supplies oxygen to the respiratory air which is circulated back to the mouthpiece passage either directly or through a breathing bag which is mounted in the respiratory air breathing passages.

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