Noise reducing exhalation valve and diaphragm

Details Noise reducing exhalation valve and diaphragm Noise reducing exhalation valve and diaphragm

1978-04-24

1980-02-26

Recla, Henry J.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

137528, 251 611, A61M 1600

Patent

active

041900456

ABSTRACT:
A one-piece, integrally molded diaphragm for use in exhalation valves of respiratory apparatus to prevent the propagation of harmonic acoustic vibrations. High frequency oscillations are prevented from propagating by means of mechanical damping. The damper takes the form of a thin circular flutter sheet molded onto the face of the diaphragm and extending past the sealing area of a valve seat.

REFERENCES:
patent: 3394732 (1968-07-01), Lisciani
patent: 3559676 (1971-02-01), Haskins
patent: 3608574 (1971-09-01), Beaussant
patent: 3861642 (1975-01-01), Maddocks

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