Patent · US Active

Gas-mixing device for respirators

US8047205B2 · kind B2 · utility

8Cited by

29References

15Claims

0Family size

Assignee

Dräger Medical GmbH · DE

Inventors

Tilman von BLUMENTHAL · Wulfen, DE
Judith Löser · Lübeck, DE
Ralf Lorenzen · Wulfen, DE
Bernhard Ludwig · Lübeck, DE
Frank Oelgarth · Gex, FR

Key dates

Filing date	Nov 8, 2007
Grant date	Nov 1, 2011
Priority date	—
Expiry date	Aug 18, 2030

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2202/0208
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A gas-mixing device for respirators can be used both in stationary operation and in mobile operation. The gas-mixing device has a storage tank (5), into which compressed air and oxygen can be introduced by dispensing valves (3, 8). In addition, a blower (10), which draws in gas from the environment (11), is connected to the storage tank (5). To dispense gas from the pressurized gas sources (4, 6) by means of the dispensing valves (3, 8), a first operating pressure level is set in the storage tank (5). When changing over to the blower operation, the operating pressure level is lowered to a pressure level adapted to the maximum respiration pressure.

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