Gas mixing apparatus

Details Gas mixing apparatus Gas mixing apparatus

A - Human Necessities

62

B

137/1.5

A62B 7/00 (2006.01) A62B 7/14 (2006.01) G05D 11/00 (2006.01)

Patent

CA 1072415

ABSTRACT OF THE DISCLOSURE Apparatus for supplying a mixture of oxygen and air for respiratory purposes and comprising a supply regulator having a first chamber with an inlet and an outlet for oxygen and a second chamber with an inlet and an outlet for air, control means responsive to a higher pressure in said first than said second chambers to permit air to enter said second chamber, adjustment means for modifying the action of said control means, first and second restrictors in the first and second outlets respectively, the second restrictor bore being larger than that of the first, said first and second outlets leading to a common supply duct and thence to a first demand regulator responsive to an inspiration pressure drop to permit a flow of gas therethrough.

278936

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