초록 ▼

An anesthetic vaporizer comprises a housing having a gas inlet and outlet, a vaporizing chamber, a vaporizing passage for passing carrier gas from the gas inlet to the vaporizing chamber and withdrawing gas enriched with vaporized anesthetic therefrom for passage towards the gas outlet via a flow co

An anesthetic vaporizer comprises a housing having a gas inlet and outlet, a vaporizing chamber, a vaporizing passage for passing carrier gas from the gas inlet to the vaporizing chamber and withdrawing gas enriched with vaporized anesthetic therefrom for passage towards the gas outlet via a flow control valve, a gas bypass passage for passing gas from the gas inlet via a bypass control valve for mixing with anesthetic enriched gas adjacent the gas outlet, wherein the bypass control valve is operated by a Teflon control rod in response to the temperature within the vaporizing chamber. The control rod is physically isolated relative to the vaporizing chamber, but disposed in intimate thermal contact therewith. The vaporizing passage includes an inlet portion in the form of a spiral tube having opposite ends connected to the gas inlet and the vaporizing chamber and an outlet portion defined by a spiral passage bounded by the exterior of the spiral tube and a pair of concentrically disposed wick sleeves disposed in surface engagement with the spiral tube and in fluid communication with the vaporizing chamber; wherein one end of the spiral passage communicates with the vaporizing chamber and an opposite end communicates with the flow control valve.

대표청구항 ▼

An anesthetic vaporizer including in combination: a container for receiving liquid volatilizable anesthetic, said container having a cylindrical side wall and top and bottom walls and is fitted with a space occupying device cooperating with said container to define a lower chamber for receiving said

An anesthetic vaporizer including in combination: a container for receiving liquid volatilizable anesthetic, said container having a cylindrical side wall and top and bottom walls and is fitted with a space occupying device cooperating with said container to define a lower chamber for receiving said liquid volatilizable anesthetic, an upper chamber and an annular passage adjacent said cylindrical side wall extending between said lower and upper chambers; an inlet for receiving a gas and an outlet for discharging a mixture of the gas and volatilized anesthetic; first conduit means for conducting said gas from said inlet to said container so as to entrain vaporized anesthetic therein and create a preliminary mixture of said gas and volatilized anesthetic and conducting said preliminary mixture towards said outlet, and including a spirally wound tube having a fluid impermeable wall with one end thereof disposed in flow communication with said inlet and a second end thereof disposed in flow communication with said lower chamber above the level of said liquid volatilizable anesthetic, a spiral passage bounded by the coils of said tube and a pair of cylindrical wick members extending one between said tube and said cylindrical side wall and the other between said tube and said space occupying device, said pair of wick devices having lower ends thereof extending into said lower chamber for immersion within said liquid volatilizable anesthetic, said spiral passage having one end disposed in flow communication with said lower chamber above the level of said liquid volatilizable anesthetic and a second end disposed in flow communication with said upper chamber, and an adjustable flow control valve for regulating the flow of said preliminary mixture from said upper chamber to said outlet; second conduit means for conducting said gas from said inlet for mixing with said preliminary mixture at a point intermediate said flow control valve and said outlet to create said mixture, and including an adjustable bypass control valve for regulating the flow of said gas prior to mixing thereof with said preliminary mixture; and one of said valves is adjustable in response to the temperature existing within said lower chamber.