Negative pressure drainage vessel

Details Negative pressure drainage vessel Negative pressure drainage vessel

1975-07-23

1978-02-14

Truluck, Dalton L.

Surgery

Respiratory method or device

Ozone or ion generation

A61M 100

Patent

active

040732940

ABSTRACT:
A negative pressure drainage vessel equipped with an interior resilient flexible diaphragm and means for producing a negative pressure on that side of such diaphragm which is proximate a fluid recovery area. The opposite side of the diaphragm is exposed to atmospheric pressure. A progressive rise of fluid level in the container, as may tend to increase the pressure on the negative-pressure side of the diaphragm, is accompanied by an elastomeric contraction "pull-down" or "pull-up" of the diaphragm so as to maintain essentially the negative pressure required for an essentially constant suction condition for a large progressive rise in fluid level. The negative pressure may be increased by periodic application of vacuum as may be effected by an air-evacuation mechanism. A separate, liquid-filled bag may be employed together with an appropriate valving means.

REFERENCES:
patent: 2890699 (1959-06-01), Miller
patent: 3111145 (1963-11-01), Kerns
patent: 3809086 (1974-05-01), Schachet et al.
patent: 3889677 (1975-06-01), Nehring

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