Patent ID: 9095677
Filing Date: 2015-08-04
Classification: A61M,B67D

Abstract:
1. A breathing apparatus comprising: a breathing circuit adapted to deliver inspiratory gas to, and receive expiratory gas from, a breathing subject; a reservoir containing a liquid anesthetic agent in an interior of said reservoir; an injector valve in fluid communication with said breathing circuit and with said interior of said reservoir; said reservoir comprising an inlet valve in fluid communication with said interior of said reservoir, above said liquid anesthetic agent in said interior of said reservoir; said reservoir comprising an outlet valve in fluid communication with said interior of said reservoir, above said liquid anesthetic agent in said interior of said reservoir; said reservoir comprising a normally closed refilling port at the reservoir that, when opened by a filling action, allows refilling of said reservoir with said liquid anesthetic agent; a control computer configured, while said refilling port is closed, to open said inlet valve to place said liquid anesthetic agent in said reservoir at an overpressure that is above atmospheric pressure, and to operate said injector valve to inject said liquid anesthetic agent, delivered to said injector valve by said overpressure, into said inspiratory gas; a filling action sensor at said port that detects an occurrence of said filling action and thereupon emits a filling action sensor signal; and said control computer being in communication with said filling action sensor to receive said filling action sensor signal therefrom, said control computer, upon receiving said filling actions sensor signal, being configured to automatically open said outlet valve to relieve said overpressure in said interior of said reservoir until atmospheric pressure is reached in said interior of said reservoir, and thereby automatically precluding said filling action from occurring while said overpressure exists in said interior of said reservoir.