Respirator with oxygen enrichment
First Claim
1. A respirator, comprising:
- an inlet line;
an outlet line;
a delivery means for drawing in breathing gas via said inlet line and for pumping the breathing gas into said outlet line;
a discharge opening which branches off from said outlet line;
a discharge valve for setting a partial flow of the gas being delivered through said discharge opening;
a return line extending from said discharge opening to said outlet line for passage of said partial flow from said discharge opening to said inlet line;
an oxygen source connected to a circuit formed by said inlet line, said outlet line and said return line, upstream of said discharge opening.
4 Assignments
0 Petitions
Accused Products
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.
45 Citations
15 Claims
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1. A respirator, comprising:
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an inlet line; an outlet line; a delivery means for drawing in breathing gas via said inlet line and for pumping the breathing gas into said outlet line; a discharge opening which branches off from said outlet line; a discharge valve for setting a partial flow of the gas being delivered through said discharge opening; a return line extending from said discharge opening to said outlet line for passage of said partial flow from said discharge opening to said inlet line; an oxygen source connected to a circuit formed by said inlet line, said outlet line and said return line, upstream of said discharge opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification