Exhalation valve for respiratory circuit

Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure

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12820418, A62B 902

Patent

active

050205323

ABSTRACT:
A valve for the expiratory tubing of a ventilator circuit. The valve assembly includes a valve body, diaphragm, top cap and control tubing. The valve body includes a valve seat, annular surface, sealing ribs, along with other annular members. The diaphragm includes a thick center portion, connected by a thin web to a relatively thick annular rim and surrounding flange. The top cap includes a compression ring which clamps the diaphragm annular flange to the valve annular surface. In the valve open position, the valve body supports the diaphragm only at the diaphragm flange.

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patent: 4699137 (1987-10-01), Schroeder

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