Pressure relief valve for anesthetic administration

Details Pressure relief valve for anesthetic administration Pressure relief valve for anesthetic administration

1975-08-29

1977-05-31

Michell, Robert W.

Surgery

Truss

Pad

128276, 1376142, A61M 1600

Patent

active

040262847

ABSTRACT:
A "pop-off" valve which is inserted in the patient anesthesia circle controllably relieves pressure build up into a vacuum exhaust system. A vertically disposed housing has a lower chamber accessing the circle, and an interconnected upper chamber connected to the vacuum exhaust. In the lower chamber a nylon ball in a frustoconical cavity provides predetermined back pressure whether opened or seated. A characterized plug in screw engagement with the housing mates with a formed opening between the two cavities, and provides facility to close the valve or to occlude flow by a predetermined amount.

REFERENCES:
patent: 717437 (1902-12-01), McCall
patent: 1919232 (1933-07-01), Lee
patent: 2941542 (1960-06-01), Jacobson
patent: 3084691 (1963-04-01), Stoner
patent: 3360807 (1967-12-01), Haidek et al.
patent: 3575196 (1971-04-01), Marrese
patent: 3761053 (1973-09-01), Bedo et al.
patent: 3908987 (1975-09-01), Boehringer

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