Patent · US Expired

Respirator with blower support and regeneration of the breathing filter

US5036842A · kind A · utility

16Cited by

7References

5Claims

0Family size

Assignee

DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

Carl-Ernst van der Smissen · Lübeck, DE
Wolfgang Eckstein · Sereetz, DE
Hans-Joachim Walther · Lübeck, DE

Key dates

Filing date	Dec 26, 1989
Grant date	Aug 6, 1991
Priority date	—
Expiry date	Dec 26, 2009

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M16/107
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A respirator with blower support for the flow through at least two filters in the breathing gas lead is provided such that the flow of one of the filters temporarily is in the inhalation direction and the other flow is in the exhalation direction respectively and their flow through direction is periodically reversible. This allows flow through of the filter in small volumes without a premature bursting or filter depletion. The wearer comfort should remain and the blower support is not diminished in its operation.

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