Respirator with oxygen enrichment

Details Respirator with oxygen enrichment Respirator with oxygen enrichment

1997-06-02

1998-12-15

Weiss, John G.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820424, 12820421, 12820511, 12820312, A61M 1600

Patent

active

058485910

ABSTRACT:
A respirator with a delivery device, which draws in ambient air via an inlet line and pumps it into an outlet line, with a discharge opening, which branches off from the outlet line and via which a partial flow of the gas being delivered, which can be set with a discharge valve, escapes. Oxygen is added with the smallest possible loss of gas and with good constancy of the concentration by: providing the inlet line with a buffer volume, via which the ambient air drawn in can flow; providing a return line which introduces the partial flow into the buffer volume is present between the discharge opening and the buffer volume; and providing the oxygen source connected to the inlet line and/or to the buffer volume.

REFERENCES:
patent: 2918917 (1959-12-01), Emerson
patent: 4186737 (1980-02-01), Valente et al.
patent: 5103814 (1992-04-01), Mahes
patent: 5694926 (1997-12-01), DeVries et al.

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