Static pressure automatic control device for closed circuit resp

Details Static pressure automatic control device for closed circuit resp Static pressure automatic control device for closed circuit resp

1984-12-21

1986-05-27

Kamm, William E.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

A62B 700

Patent

active

045909334

ABSTRACT:
A static pressure automatic control device for respirators of closed-circuit type comprises an exhaled air passage which is branched out of an exhalation system of a respirator and a static pressure discharge valve connected in series to this exhaled air passage. A respiratory dynamic pressure generated by exhalation is attenuated due to resistance encountered while the exhaled air is being passed through the exhaled air passage and substantially the static pressure only is applied to the discharge valve. When the static pressure exceeds a predetermined value, the discharge valve opens to let out a part of gas and thereby decreases the static pressure to the predetermined value.

REFERENCES:
patent: 3129707 (1964-04-01), Becker et al.
patent: 3200818 (1965-08-01), Johannisson
patent: 3366108 (1968-01-01), Blackburn et al.
patent: 4154234 (1979-05-01), Baker

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