Metering device for a liquid anesthetic via an intermediate container
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United States of America Patent
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-
Sep 14, 1993
Grant Date -
N/A
app pub date -
Feb 10, 1992
filing date -
Mar 6, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A metering device for a liquid anesthetic that is fed from a reservoir via a supply line into a heatable intermediate container maintained under pressure, from which gaseous anesthetic is fed via a metering valve into a fresh gas line. Accurate metering, which can be better monitored, is provided for low-boiling anesthetics. A supply unit 7 is mounted in the supply line 5, and liquid anesthetic is transported by the supply unit 7 into the intermediate container 6 until it is filled up to a predetermined filling level. A heating device 12 stabilizes the temperature of the liquid bath and ensures a sufficiently high vapor pressure of the gaseous anesthetic above the liquid phase. The anesthetic vapor is sent via the metering valve into the fresh gas line.
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