Valve for respirator

Details Valve for respirator Valve for respirator

1989-05-09

1990-09-25

Green, Randall L.

Surgery

Respiratory method or device

Means for transmitting, or facilitating, voice communication...

12820524, 12820712, A62B 700

Patent

active

049586335

ABSTRACT:
A valve for a respirator has an elastomeric valve member (18) of generally dished form with an annular channel (25) around its central portion (24). The member (18) is secured at its center by a shouldered conical stem (19) and seals round its periphery (23). The channel (25) allows a sudden collapse of resistance to opening force in the direction of the arrow A above a predetermined amount, but a positive biassing action towards closure. The edges of the channel (26,27) are slightly axially displaced from one another. Both inlet and outlet valves of a respirator may be equipped with such a valve member.

REFERENCES:
patent: 3035574 (1962-05-01), Lytle et al.
patent: 3232304 (1966-02-01), Koester
patent: 3342200 (1967-09-01), Wilcox
patent: 3602219 (1971-08-01), Warncke
patent: 4414973 (1983-11-01), Matheson et al.
patent: 4539983 (1985-09-01), Angell

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