Patent · US Expired

Apparatus for warming and moistening a respiration gas

US4200094A · kind A · utility

60Cited by

3References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Andras Gedeon · Täby, SE
Sven-Gunnar Olsson · Ždírec nad Doubravou, CZ
Georgios Psaros · Tullinge, SE

Key dates

Filing date	Mar 3, 1978
Grant date	Apr 29, 1980
Priority date	—
Expiry date	Mar 3, 1998

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M16/1045
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

In the illustrated embodiment, the moisture reservoir comprises a tube of gas-permeable, hygroscopic material. The exhalation flow path is into a blind axial bore of a spool like member having a series of transverse notches or cuts at the top and bottom which provide interspaces leading from the bore to the tube which covers the notches at their periphery. The notches leave integral fins or lamellae with large surface area exposed to the in-flow of dry respiration gas radially through the tube wall and into the interspaces which provide further reservoirs for moisture and warmth.

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