Patent · US Active

Compressed air respirator

US7578293B2 · kind B2 · utility

13Cited by

15References

3Claims

0Family size

Assignee

DRÄGER SAFETY AG & CO. KGAA · DE

Inventors

Hans Matthiessen · Bad Schwartau, DE
Kai Kuck · Hamburg, DE

Key dates

Filing date	Mar 9, 2006
Grant date	Aug 25, 2009
Priority date	—
Expiry date	Jun 5, 2026

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M16/201
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A compressed air respirator has prolonged operating time due to a rebreathing feature. The respirator has a compressed air reserve (1) with a connected demand air supply valve (2), wherein the demand air supply valve (2) is connected with a reversible breathing gas reservoir (4) with adjustable volume. A rebreathing line (25) for the user of the apparatus has an expiration valve (88), wherein the rebreathing line (25) is connected with the breathing gas reservoir (4).

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