Diaphragm assembly for the demand regulator of a breathing appar

Details Diaphragm assembly for the demand regulator of a breathing appar Diaphragm assembly for the demand regulator of a breathing appar

1982-10-07

1985-07-02

Nilson, Robert G.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

92 6D, 137102, 13750546, 137DIG9, A62B 704

Patent

active

RE0319325

ABSTRACT:
A diaphragm assembly for the demand regulator of a breathing apparatus utilizes a diaphragm that gradually flattens down against a conical platform so as to reduce the effective sensing area. Advantageously the diaphragm is used in conjunction with an aspirator opening adjusted for maximum aspiration effect at low flow rates. At increased flow rates the reduced sensing area compensates for increased aspiration, insuring stable operation. The diaphragm periphery cooperates with the conical platform outer edge to serve as the regulator exhaust valve.

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